Halide 17.0.2
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Generator.h
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1#ifndef HALIDE_GENERATOR_H_
2#define HALIDE_GENERATOR_H_
3
4/** \file
5 *
6 * Generator is a class used to encapsulate the building of Funcs in user
7 * pipelines. A Generator is agnostic to JIT vs AOT compilation; it can be used for
8 * either purpose, but is especially convenient to use for AOT compilation.
9 *
10 * A Generator explicitly declares the Inputs and Outputs associated for a given
11 * pipeline, and (optionally) separates the code for constructing the outputs from the code from
12 * scheduling them. For instance:
13 *
14 * \code
15 * class Blur : public Generator<Blur> {
16 * public:
17 * Input<Func> input{"input", UInt(16), 2};
18 * Output<Func> output{"output", UInt(16), 2};
19 * void generate() {
20 * blur_x(x, y) = (input(x, y) + input(x+1, y) + input(x+2, y))/3;
21 * blur_y(x, y) = (blur_x(x, y) + blur_x(x, y+1) + blur_x(x, y+2))/3;
22 * output(x, y) = blur(x, y);
23 * }
24 * void schedule() {
25 * blur_y.split(y, y, yi, 8).parallel(y).vectorize(x, 8);
26 * blur_x.store_at(blur_y, y).compute_at(blur_y, yi).vectorize(x, 8);
27 * }
28 * private:
29 * Var x, y, xi, yi;
30 * Func blur_x, blur_y;
31 * };
32 * \endcode
33 *
34 * Halide can compile a Generator into the correct pipeline by introspecting these
35 * values and constructing an appropriate signature based on them.
36 *
37 * A Generator provides implementations of two methods:
38 *
39 * - generate(), which must fill in all Output Func(s); it may optionally also do scheduling
40 * if no schedule() method is present.
41 * - schedule(), which (if present) should contain all scheduling code.
42 *
43 * Inputs can be any C++ scalar type:
44 *
45 * \code
46 * Input<float> radius{"radius"};
47 * Input<int32_t> increment{"increment"};
48 * \endcode
49 *
50 * An Input<Func> is (essentially) like an ImageParam, except that it may (or may
51 * not) not be backed by an actual buffer, and thus has no defined extents.
52 *
53 * \code
54 * Input<Func> input{"input", Float(32), 2};
55 * \endcode
56 *
57 * You can optionally make the type and/or dimensions of Input<Func> unspecified,
58 * in which case the value is simply inferred from the actual Funcs passed to them.
59 * Of course, if you specify an explicit Type or Dimension, we still require the
60 * input Func to match, or a compilation error results.
61 *
62 * \code
63 * Input<Func> input{ "input", 3 }; // require 3-dimensional Func,
64 * // but leave Type unspecified
65 * \endcode
66 *
67 * A Generator must explicitly list the output(s) it produces:
68 *
69 * \code
70 * Output<Func> output{"output", Float(32), 2};
71 * \endcode
72 *
73 * You can specify an output that returns a Tuple by specifying a list of Types:
74 *
75 * \code
76 * class Tupler : Generator<Tupler> {
77 * Input<Func> input{"input", Int(32), 2};
78 * Output<Func> output{"output", {Float(32), UInt(8)}, 2};
79 * void generate() {
80 * Var x, y;
81 * Expr a = cast<float>(input(x, y));
82 * Expr b = cast<uint8_t>(input(x, y));
83 * output(x, y) = Tuple(a, b);
84 * }
85 * };
86 * \endcode
87 *
88 * You can also specify Output<X> for any scalar type (except for Handle types);
89 * this is merely syntactic sugar on top of a zero-dimensional Func, but can be
90 * quite handy, especially when used with multiple outputs:
91 *
92 * \code
93 * Output<float> sum{"sum"}; // equivalent to Output<Func> {"sum", Float(32), 0}
94 * \endcode
95 *
96 * As with Input<Func>, you can optionally make the type and/or dimensions of an
97 * Output<Func> unspecified; any unspecified types must be resolved via an
98 * implicit GeneratorParam in order to use top-level compilation.
99 *
100 * You can also declare an *array* of Input or Output, by using an array type
101 * as the type parameter:
102 *
103 * \code
104 * // Takes exactly 3 images and outputs exactly 3 sums.
105 * class SumRowsAndColumns : Generator<SumRowsAndColumns> {
106 * Input<Func[3]> inputs{"inputs", Float(32), 2};
107 * Input<int32_t[2]> extents{"extents"};
108 * Output<Func[3]> sums{"sums", Float(32), 1};
109 * void generate() {
110 * assert(inputs.size() == sums.size());
111 * // assume all inputs are same extent
112 * Expr width = extent[0];
113 * Expr height = extent[1];
114 * for (size_t i = 0; i < inputs.size(); ++i) {
115 * RDom r(0, width, 0, height);
116 * sums[i]() = 0.f;
117 * sums[i]() += inputs[i](r.x, r.y);
118 * }
119 * }
120 * };
121 * \endcode
122 *
123 * You can also leave array size unspecified, with some caveats:
124 * - For ahead-of-time compilation, Inputs must have a concrete size specified
125 * via a GeneratorParam at build time (e.g., pyramid.size=3)
126 * - For JIT compilation via a Stub, Inputs array sizes will be inferred
127 * from the vector passed.
128 * - For ahead-of-time compilation, Outputs may specify a concrete size
129 * via a GeneratorParam at build time (e.g., pyramid.size=3), or the
130 * size can be specified via a resize() method.
131 *
132 * \code
133 * class Pyramid : public Generator<Pyramid> {
134 * public:
135 * GeneratorParam<int32_t> levels{"levels", 10};
136 * Input<Func> input{ "input", Float(32), 2 };
137 * Output<Func[]> pyramid{ "pyramid", Float(32), 2 };
138 * void generate() {
139 * pyramid.resize(levels);
140 * pyramid[0](x, y) = input(x, y);
141 * for (int i = 1; i < pyramid.size(); i++) {
142 * pyramid[i](x, y) = (pyramid[i-1](2*x, 2*y) +
143 * pyramid[i-1](2*x+1, 2*y) +
144 * pyramid[i-1](2*x, 2*y+1) +
145 * pyramid[i-1](2*x+1, 2*y+1))/4;
146 * }
147 * }
148 * };
149 * \endcode
150 *
151 * A Generator can also be customized via compile-time parameters (GeneratorParams),
152 * which affect code generation.
153 *
154 * GeneratorParams, Inputs, and Outputs are (by convention) always
155 * public and always declared at the top of the Generator class, in the order
156 *
157 * \code
158 * GeneratorParam(s)
159 * Input<Func>(s)
160 * Input<non-Func>(s)
161 * Output<Func>(s)
162 * \endcode
163 *
164 * Note that the Inputs and Outputs will appear in the C function call in the order
165 * they are declared. All Input<Func> and Output<Func> are represented as halide_buffer_t;
166 * all other Input<> are the appropriate C++ scalar type. (GeneratorParams are
167 * always referenced by name, not position, so their order is irrelevant.)
168 *
169 * All Inputs and Outputs must have explicit names, and all such names must match
170 * the regex [A-Za-z][A-Za-z_0-9]* (i.e., essentially a C/C++ variable name, with
171 * some extra restrictions on underscore use). By convention, the name should match
172 * the member-variable name.
173 *
174 * You can dynamically add Inputs and Outputs to your Generator via adding a
175 * configure() method; if present, it will be called before generate(). It can
176 * examine GeneratorParams but it may not examine predeclared Inputs or Outputs;
177 * the only thing it should do is call add_input<>() and/or add_output<>(), or call
178 * set_type()/set_dimensions()/set_array_size() on an Input or Output with an unspecified type.
179 * Added inputs will be appended (in order) after predeclared Inputs but before
180 * any Outputs; added outputs will be appended after predeclared Outputs.
181 *
182 * Note that the pointers returned by add_input() and add_output() are owned
183 * by the Generator and will remain valid for the Generator's lifetime; user code
184 * should not attempt to delete or free them.
185 *
186 * \code
187 * class MultiSum : public Generator<MultiSum> {
188 * public:
189 * GeneratorParam<int32_t> input_count{"input_count", 10};
190 * Output<Func> output{ "output", Float(32), 2 };
191 *
192 * void configure() {
193 * for (int i = 0; i < input_count; ++i) {
194 * extra_inputs.push_back(
195 * add_input<Func>("input_" + std::to_string(i), Float(32), 2);
196 * }
197 * }
198 *
199 * void generate() {
200 * Expr sum = 0.f;
201 * for (int i = 0; i < input_count; ++i) {
202 * sum += (*extra_inputs)[i](x, y);
203 * }
204 * output(x, y) = sum;
205 * }
206 * private:
207 * std::vector<Input<Func>* extra_inputs;
208 * };
209 * \endcode
210 *
211 * All Generators have two GeneratorParams that are implicitly provided
212 * by the base class:
213 *
214 * GeneratorParam<Target> target{"target", Target()};
215 * GeneratorParam<AutoschedulerParams> autoscheduler{"autoscheduler", {}}
216 *
217 * - 'target' is the Halide::Target for which the Generator is producing code.
218 * It is read-only during the Generator's lifetime, and must not be modified;
219 * its value should always be filled in by the calling code: either the Halide
220 * build system (for ahead-of-time compilation), or ordinary C++ code
221 * (for JIT compilation).
222 * - 'autoscheduler' is a string-to-string map that is used to indicates whether
223 * and how an auto-scheduler should be run for this Generator:
224 * - if empty, the Generator should schedule its Funcs as it sees fit; no autoscheduler will be run.
225 * - if the 'name' key is set, it should be one of the known autoschedulers
226 * provided with this release of Halide, which will be used to schedule
227 * the Funcs in the Generator. In this case, the Generator should only
228 * provide estimate()s for its Funcs, and not call any other scheduling methods.
229 * - Other keys may be specified in the params, on a per-autoscheduler
230 * basis, to optimize or enhance the automatically-generated schedule.
231 * See documentation for each autoscheduler for options.
232 *
233 * Generators are added to a global registry to simplify AOT build mechanics; this
234 * is done by simply using the HALIDE_REGISTER_GENERATOR macro at global scope:
235 *
236 * \code
237 * HALIDE_REGISTER_GENERATOR(ExampleGen, jit_example)
238 * \endcode
239 *
240 * The registered name of the Generator is provided must match the same rules as
241 * Input names, above.
242 *
243 * Note that the class name of the generated Stub class will match the registered
244 * name by default; if you want to vary it (typically, to include namespaces),
245 * you can add it as an optional third argument:
246 *
247 * \code
248 * HALIDE_REGISTER_GENERATOR(ExampleGen, jit_example, SomeNamespace::JitExampleStub)
249 * \endcode
250 *
251 * Note that a Generator is always executed with a specific Target assigned to it,
252 * that you can access via the get_target() method. (You should *not* use the
253 * global get_target_from_environment(), etc. methods provided in Target.h)
254 *
255 * (Note that there are older variations of Generator that differ from what's
256 * documented above; these are still supported but not described here. See
257 * https://github.com/halide/Halide/wiki/Old-Generator-Documentation for
258 * more information.)
259 */
260
261#include <algorithm>
262#include <functional>
263#include <iterator>
264#include <limits>
265#include <memory>
266#include <mutex>
267#include <set>
268#include <sstream>
269#include <string>
270#include <type_traits>
271#include <utility>
272#include <vector>
273
274#include "AbstractGenerator.h"
275#include "Func.h"
276#include "ImageParam.h"
277#include "Introspection.h"
279#include "Target.h"
280
281#if !(__cplusplus >= 201703L || _MSVC_LANG >= 201703L)
282#error "Halide requires C++17 or later; please upgrade your compiler."
283#endif
284
285namespace Halide {
286
287class GeneratorContext;
288
289namespace Internal {
290
292
293class GeneratorBase;
294
295std::vector<Expr> parameter_constraints(const Parameter &p);
296
297template<typename T>
298HALIDE_NO_USER_CODE_INLINE std::string enum_to_string(const std::map<std::string, T> &enum_map, const T &t) {
299 for (const auto &key_value : enum_map) {
300 if (t == key_value.second) {
301 return key_value.first;
302 }
303 }
304 user_error << "Enumeration value not found.\n";
305 return "";
306}
307
308template<typename T>
309T enum_from_string(const std::map<std::string, T> &enum_map, const std::string &s) {
310 auto it = enum_map.find(s);
311 user_assert(it != enum_map.end()) << "Enumeration value not found: " << s << "\n";
312 return it->second;
313}
314
315extern const std::map<std::string, Halide::Type> &get_halide_type_enum_map();
316inline std::string halide_type_to_enum_string(const Type &t) {
318}
319
320// Convert a Halide Type into a string representation of its C source.
321// e.g., Int(32) -> "Halide::Int(32)"
322std::string halide_type_to_c_source(const Type &t);
323
324// Convert a Halide Type into a string representation of its C Source.
325// e.g., Int(32) -> "int32_t"
326std::string halide_type_to_c_type(const Type &t);
327
328/** GeneratorFactoryProvider provides a way to customize the Generators
329 * that are visible to generate_filter_main (which otherwise would just
330 * look at the global registry of C++ Generators). */
332public:
334 virtual ~GeneratorFactoryProvider() = default;
335
336 /** Return a list of all registered Generators that are available for use
337 * with the create() method. */
338 virtual std::vector<std::string> enumerate() const = 0;
339
340 /** Create an instance of the Generator that is registered under the given
341 * name. If the name isn't one returned by enumerate(), return nullptr
342 * rather than assert-fail; caller must check for a valid result. */
343 virtual AbstractGeneratorPtr create(const std::string &name,
344 const Halide::GeneratorContext &context) const = 0;
345
350};
351
352/** Return a GeneratorFactoryProvider that knows about all the currently-registered C++ Generators. */
354
355/** generate_filter_main() is a convenient wrapper for GeneratorRegistry::create() +
356 * compile_to_files(); it can be trivially wrapped by a "real" main() to produce a
357 * command-line utility for ahead-of-time filter compilation. */
358int generate_filter_main(int argc, char **argv);
359
360/** This overload of generate_filter_main lets you provide your own provider for how to enumerate and/or create
361 * the generators based on registration name; this is useful if you want to re-use the
362 * 'main' logic but avoid the global Generator registry (e.g. for bindings in languages
363 * other than C++). */
365
366// select_type<> is to std::conditional as switch is to if:
367// it allows a multiway compile-time type definition via the form
368//
369// select_type<cond<condition1, type1>,
370// cond<condition2, type2>,
371// ....
372// cond<conditionN, typeN>>::type
373//
374// Note that the conditions are evaluated in order; the first evaluating to true
375// is chosen.
376//
377// Note that if no conditions evaluate to true, the resulting type is illegal
378// and will produce a compilation error. (You can provide a default by simply
379// using cond<true, SomeType> as the final entry.)
380template<bool B, typename T>
381struct cond {
382 static constexpr bool value = B;
383 using type = T;
384};
385
386template<typename First, typename... Rest>
387struct select_type : std::conditional<First::value, typename First::type, typename select_type<Rest...>::type> {};
388
389template<typename First>
391 using type = typename std::conditional<First::value, typename First::type, void>::type;
392};
393
395
397public:
398 explicit GeneratorParamBase(const std::string &name);
400
401 inline const std::string &name() const {
402 return name_;
403 }
404
405 // overload the set() function to call the right virtual method based on type.
406 // This allows us to attempt to set a GeneratorParam via a
407 // plain C++ type, even if we don't know the specific templated
408 // subclass. Attempting to set the wrong type will assert.
409 // Notice that there is no typed setter for Enums, for obvious reasons;
410 // setting enums in an unknown type must fallback to using set_from_string.
411 //
412 // It's always a bit iffy to use macros for this, but IMHO it clarifies the situation here.
413#define HALIDE_GENERATOR_PARAM_TYPED_SETTER(TYPE) \
414 virtual void set(const TYPE &new_value) = 0;
415
428 HALIDE_GENERATOR_PARAM_TYPED_SETTER(AutoschedulerParams)
431
432#undef HALIDE_GENERATOR_PARAM_TYPED_SETTER
433
434 // Add overloads for string and char*
435 void set(const std::string &new_value) {
437 }
438 void set(const char *new_value) {
439 set_from_string(std::string(new_value));
440 }
441
442protected:
443 friend class GeneratorBase;
444 friend class GeneratorParamInfo;
445 friend class StubEmitter;
446
449
450 // All GeneratorParams are settable from string.
451 virtual void set_from_string(const std::string &value_string) = 0;
452
453 virtual std::string call_to_string(const std::string &v) const = 0;
454 virtual std::string get_c_type() const = 0;
455
456 virtual std::string get_type_decls() const {
457 return "";
458 }
459
460 virtual std::string get_default_value() const = 0;
461
462 virtual bool is_synthetic_param() const {
463 return false;
464 }
465
466 virtual bool is_looplevel_param() const {
467 return false;
468 }
469
470 void fail_wrong_type(const char *type);
471
472private:
473 const std::string name_;
474
475 // Generator which owns this GeneratorParam. Note that this will be null
476 // initially; the GeneratorBase itself will set this field when it initially
477 // builds its info about params. However, since it (generally) isn't
478 // appropriate for GeneratorParam<> to be declared outside of a Generator,
479 // all reasonable non-testing code should expect this to be non-null.
480 GeneratorBase *generator{nullptr};
481
482public:
487};
488
489// This is strictly some syntactic sugar to suppress certain compiler warnings.
490template<typename FROM, typename TO>
491struct Convert {
493 inline static TO2 value(const FROM &from) {
494 return static_cast<TO2>(from);
495 }
496
498 inline static TO2 value(const FROM &from) {
499 return from != 0;
500 }
501};
502
503template<typename T>
505public:
506 using type = T;
507
508 GeneratorParamImpl(const std::string &name, const T &value)
510 }
511
512 T value() const {
513 this->check_value_readable();
514 return value_;
515 }
516
517 operator T() const {
518 return this->value();
519 }
520
521 operator Expr() const {
522 return make_const(type_of<T>(), this->value());
523 }
524
525#define HALIDE_GENERATOR_PARAM_TYPED_SETTER(TYPE) \
526 void set(const TYPE &new_value) override { \
527 typed_setter_impl<TYPE>(new_value, #TYPE); \
528 }
529
545
546#undef HALIDE_GENERATOR_PARAM_TYPED_SETTER
547
548 // Overload for std::string.
549 void set(const std::string &new_value) {
552 }
553
554protected:
555 virtual void set_impl(const T &new_value) {
558 }
559
560 // Needs to be protected to allow GeneratorParam<LoopLevel>::set() override
562
563private:
564 // If FROM->T is not legal, fail
565 template<typename FROM, typename std::enable_if<
566 !std::is_convertible<FROM, T>::value>::type * = nullptr>
567 HALIDE_ALWAYS_INLINE void typed_setter_impl(const FROM &, const char *msg) {
568 fail_wrong_type(msg);
569 }
570
571 // If FROM and T are identical, just assign
572 template<typename FROM, typename std::enable_if<
573 std::is_same<FROM, T>::value>::type * = nullptr>
574 HALIDE_ALWAYS_INLINE void typed_setter_impl(const FROM &value, const char *msg) {
576 value_ = value;
577 }
578
579 // If both FROM->T and T->FROM are legal, ensure it's lossless
580 template<typename FROM, typename std::enable_if<
581 !std::is_same<FROM, T>::value &&
582 std::is_convertible<FROM, T>::value &&
583 std::is_convertible<T, FROM>::value>::type * = nullptr>
584 HALIDE_ALWAYS_INLINE void typed_setter_impl(const FROM &value, const char *msg) {
586 const T t = Convert<FROM, T>::value(value);
588 if (value2 != value) {
589 fail_wrong_type(msg);
590 }
591 value_ = t;
592 }
593
594 // If FROM->T is legal but T->FROM is not, just assign
595 template<typename FROM, typename std::enable_if<
596 !std::is_same<FROM, T>::value &&
597 std::is_convertible<FROM, T>::value &&
598 !std::is_convertible<T, FROM>::value>::type * = nullptr>
599 HALIDE_ALWAYS_INLINE void typed_setter_impl(const FROM &value, const char *msg) {
601 value_ = value;
602 }
603};
604
605// Stubs for type-specific implementations of GeneratorParam, to avoid
606// many complex enable_if<> statements that were formerly spread through the
607// implementation. Note that not all of these need to be templated classes,
608// (e.g. for GeneratorParam_Target, T == Target always), but are declared
609// that way for symmetry of declaration.
610template<typename T>
612public:
613 GeneratorParam_Target(const std::string &name, const T &value)
615 }
616
617 void set_from_string(const std::string &new_value_string) override {
619 }
620
621 std::string get_default_value() const override {
622 return this->value().to_string();
623 }
624
625 std::string call_to_string(const std::string &v) const override {
626 std::ostringstream oss;
627 oss << v << ".to_string()";
628 return oss.str();
629 }
630
631 std::string get_c_type() const override {
632 return "Target";
633 }
634};
635
636class GeneratorParam_AutoSchedulerParams : public GeneratorParamImpl<AutoschedulerParams> {
637public:
639
640 void set_from_string(const std::string &new_value_string) override;
641 std::string get_default_value() const override;
642 std::string call_to_string(const std::string &v) const override;
643 std::string get_c_type() const override;
644
645private:
646 friend class GeneratorBase;
647
648 bool try_set(const std::string &key, const std::string &value);
649};
650
652public:
656
658
659 void set(const LoopLevel &value) override {
660 // Don't call check_value_writable(): It's OK to set a LoopLevel after generate().
661 // check_value_writable();
662
663 // This looks odd, but is deliberate:
664
665 // First, mutate the existing contents to match the value passed in,
666 // so that any existing usage of the LoopLevel now uses the newer value.
667 // (Strictly speaking, this is really only necessary if this method
668 // is called after generate(): before generate(), there is no usage
669 // to be concerned with.)
671
672 // Then, reset the value itself so that it points to the same LoopLevelContents
673 // as the value passed in. (Strictly speaking, this is really only
674 // useful if this method is called before generate(): afterwards, it's
675 // too late to alter the code to refer to a different LoopLevelContents.)
676 value_ = value;
677 }
678
679 void set_from_string(const std::string &new_value_string) override {
680 if (new_value_string == "root") {
681 this->set(LoopLevel::root());
682 } else if (new_value_string == "inlined") {
683 this->set(LoopLevel::inlined());
684 } else {
685 user_error << "Unable to parse " << this->name() << ": " << new_value_string;
686 }
687 }
688
689 std::string get_default_value() const override {
690 // This is dodgy but safe in this case: we want to
691 // see what the value of our LoopLevel is *right now*,
692 // so we make a copy and lock the copy so we can inspect it.
693 // (Note that ordinarily this is a bad idea, since LoopLevels
694 // can be mutated later on; however, this method is only
695 // called by the Generator infrastructure, on LoopLevels that
696 // will never be mutated, so this is really just an elaborate way
697 // to avoid runtime assertions.)
698 LoopLevel copy;
699 copy.set(this->value());
700 copy.lock();
701 if (copy.is_inlined()) {
702 return "LoopLevel::inlined()";
703 } else if (copy.is_root()) {
704 return "LoopLevel::root()";
705 } else {
707 return "";
708 }
709 }
710
711 std::string call_to_string(const std::string &v) const override {
713 return std::string();
714 }
715
716 std::string get_c_type() const override {
717 return "LoopLevel";
718 }
719
720 bool is_looplevel_param() const override {
721 return true;
722 }
723};
724
725template<typename T>
727public:
728 GeneratorParam_Arithmetic(const std::string &name,
729 const T &value,
730 const T &min = std::numeric_limits<T>::lowest(),
731 const T &max = std::numeric_limits<T>::max())
732 : GeneratorParamImpl<T>(name, value), min(min), max(max) {
733 // call set() to ensure value is clamped to min/max
734 this->set(value);
735 }
736
737 void set_impl(const T &new_value) override {
738 user_assert(new_value >= min && new_value <= max) << "Value out of range: " << new_value;
740 }
741
742 void set_from_string(const std::string &new_value_string) override {
743 std::istringstream iss(new_value_string);
744 T t;
745 // All one-byte ints int8 and uint8 should be parsed as integers, not chars --
746 // including 'char' itself. (Note that sizeof(bool) is often-but-not-always-1,
747 // so be sure to exclude that case.)
748 if (sizeof(T) == sizeof(char) && !std::is_same<T, bool>::value) {
749 int i;
750 iss >> i;
751 t = (T)i;
752 } else {
753 iss >> t;
754 }
755 user_assert(!iss.fail() && iss.get() == EOF) << "Unable to parse: " << new_value_string;
756 this->set(t);
757 }
758
759 std::string get_default_value() const override {
760 std::ostringstream oss;
761 oss << this->value();
762 if (std::is_same<T, float>::value) {
763 // If the constant has no decimal point ("1")
764 // we must append one before appending "f"
765 if (oss.str().find('.') == std::string::npos) {
766 oss << ".";
767 }
768 oss << "f";
769 }
770 return oss.str();
771 }
772
773 std::string call_to_string(const std::string &v) const override {
774 std::ostringstream oss;
775 oss << "std::to_string(" << v << ")";
776 return oss.str();
777 }
778
779 std::string get_c_type() const override {
780 std::ostringstream oss;
781 if (std::is_same<T, float>::value) {
782 return "float";
783 } else if (std::is_same<T, double>::value) {
784 return "double";
785 } else if (std::is_integral<T>::value) {
786 if (std::is_unsigned<T>::value) {
787 oss << "u";
788 }
789 oss << "int" << (sizeof(T) * 8) << "_t";
790 return oss.str();
791 } else {
792 user_error << "Unknown arithmetic type\n";
793 return "";
794 }
795 }
796
797private:
798 const T min, max;
799};
800
801template<typename T>
803public:
804 GeneratorParam_Bool(const std::string &name, const T &value)
806 }
807
808 void set_from_string(const std::string &new_value_string) override {
809 bool v = false;
810 if (new_value_string == "true" || new_value_string == "True") {
811 v = true;
812 } else if (new_value_string == "false" || new_value_string == "False") {
813 v = false;
814 } else {
815 user_assert(false) << "Unable to parse bool: " << new_value_string;
816 }
817 this->set(v);
818 }
819
820 std::string get_default_value() const override {
821 return this->value() ? "true" : "false";
822 }
823
824 std::string call_to_string(const std::string &v) const override {
825 std::ostringstream oss;
826 oss << "std::string((" << v << ") ? \"true\" : \"false\")";
827 return oss.str();
828 }
829
830 std::string get_c_type() const override {
831 return "bool";
832 }
833};
834
835template<typename T>
837public:
838 GeneratorParam_Enum(const std::string &name, const T &value, const std::map<std::string, T> &enum_map)
839 : GeneratorParamImpl<T>(name, value), enum_map(enum_map) {
840 }
841
842 // define a "set" that takes our specific enum (but don't hide the inherited virtual functions)
844
846 void set(const T &e) {
847 this->set_impl(e);
848 }
849
850 void set_from_string(const std::string &new_value_string) override {
851 auto it = enum_map.find(new_value_string);
852 user_assert(it != enum_map.end()) << "Enumeration value not found: " << new_value_string;
853 this->set_impl(it->second);
854 }
855
856 std::string call_to_string(const std::string &v) const override {
857 return "Enum_" + this->name() + "_map().at(" + v + ")";
858 }
859
860 std::string get_c_type() const override {
861 return "Enum_" + this->name();
862 }
863
864 std::string get_default_value() const override {
865 return "Enum_" + this->name() + "::" + enum_to_string(enum_map, this->value());
866 }
867
868 std::string get_type_decls() const override {
869 std::ostringstream oss;
870 oss << "enum class Enum_" << this->name() << " {\n";
871 for (auto key_value : enum_map) {
872 oss << " " << key_value.first << ",\n";
873 }
874 oss << "};\n";
875 oss << "\n";
876
877 // TODO: since we generate the enums, we could probably just use a vector (or array!) rather than a map,
878 // since we can ensure that the enum values are a nice tight range.
879 oss << "inline HALIDE_NO_USER_CODE_INLINE const std::map<Enum_" << this->name() << ", std::string>& Enum_" << this->name() << "_map() {\n";
880 oss << " static const std::map<Enum_" << this->name() << ", std::string> m = {\n";
881 for (auto key_value : enum_map) {
882 oss << " { Enum_" << this->name() << "::" << key_value.first << ", \"" << key_value.first << "\"},\n";
883 }
884 oss << " };\n";
885 oss << " return m;\n";
886 oss << "};\n";
887 return oss.str();
888 }
889
890private:
891 const std::map<std::string, T> enum_map;
892};
893
894template<typename T>
896public:
897 GeneratorParam_Type(const std::string &name, const T &value)
899 }
900
901 std::string call_to_string(const std::string &v) const override {
902 return "Halide::Internal::halide_type_to_enum_string(" + v + ")";
903 }
904
905 std::string get_c_type() const override {
906 return "Type";
907 }
908
909 std::string get_default_value() const override {
910 return halide_type_to_c_source(this->value());
911 }
912
913 std::string get_type_decls() const override {
914 return "";
915 }
916};
917
918template<typename T>
920public:
921 GeneratorParam_String(const std::string &name, const std::string &value)
923 }
924 void set_from_string(const std::string &new_value_string) override {
925 this->set(new_value_string);
926 }
927
928 std::string get_default_value() const override {
929 return "\"" + this->value() + "\"";
930 }
931
932 std::string call_to_string(const std::string &v) const override {
933 return v;
934 }
935
936 std::string get_c_type() const override {
937 return "std::string";
938 }
939};
940
941template<typename T>
943 typename select_type<
951
952} // namespace Internal
953
954/** GeneratorParam is a templated class that can be used to modify the behavior
955 * of the Generator at code-generation time. GeneratorParams are commonly
956 * specified in build files (e.g. Makefile) to customize the behavior of
957 * a given Generator, thus they have a very constrained set of types to allow
958 * for efficient specification via command-line flags. A GeneratorParam can be:
959 * - any float or int type.
960 * - bool
961 * - enum
962 * - Halide::Target
963 * - Halide::Type
964 * - std::string
965 * Please don't use std::string unless there's no way to do what you want with some
966 * other type; in particular, don't use this if you can use enum instead.
967 * All GeneratorParams have a default value. Arithmetic types can also
968 * optionally specify min and max. Enum types must specify a string-to-value
969 * map.
970 *
971 * Halide::Type is treated as though it were an enum, with the mappings:
972 *
973 * "int8" Halide::Int(8)
974 * "int16" Halide::Int(16)
975 * "int32" Halide::Int(32)
976 * "int64" Halide::Int(64)
977 * "uint8" Halide::UInt(8)
978 * "uint16" Halide::UInt(16)
979 * "uint32" Halide::UInt(32)
980 * "uint64" Halide::UInt(64)
981 * "float16" Halide::Float(16)
982 * "float32" Halide::Float(32)
983 * "float64" Halide::Float(64)
984 * "bfloat16" Halide::BFloat(16)
985 *
986 * No vector Types are currently supported by this mapping.
987 *
988 */
989template<typename T>
991public:
993 GeneratorParam(const std::string &name, const T &value)
994 : Internal::GeneratorParamImplBase<T>(name, value) {
995 }
996
997 GeneratorParam(const std::string &name, const T &value, const T &min, const T &max)
998 : Internal::GeneratorParamImplBase<T>(name, value, min, max) {
999 }
1000
1001 GeneratorParam(const std::string &name, const T &value, const std::map<std::string, T> &enum_map)
1002 : Internal::GeneratorParamImplBase<T>(name, value, enum_map) {
1003 }
1004
1005 GeneratorParam(const std::string &name, const std::string &value)
1006 : Internal::GeneratorParamImplBase<T>(name, value) {
1007 }
1008};
1009
1010/** Addition between GeneratorParam<T> and any type that supports operator+ with T.
1011 * Returns type of underlying operator+. */
1012// @{
1013template<typename Other, typename T>
1014auto operator+(const Other &a, const GeneratorParam<T> &b) -> decltype(a + (T)b) {
1015 return a + (T)b;
1016}
1017template<typename Other, typename T>
1018auto operator+(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a + b) {
1019 return (T)a + b;
1020}
1021// @}
1022
1023/** Subtraction between GeneratorParam<T> and any type that supports operator- with T.
1024 * Returns type of underlying operator-. */
1025// @{
1026template<typename Other, typename T>
1027auto operator-(const Other &a, const GeneratorParam<T> &b) -> decltype(a - (T)b) {
1028 return a - (T)b;
1029}
1030template<typename Other, typename T>
1031auto operator-(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a - b) {
1032 return (T)a - b;
1033}
1034// @}
1035
1036/** Multiplication between GeneratorParam<T> and any type that supports operator* with T.
1037 * Returns type of underlying operator*. */
1038// @{
1039template<typename Other, typename T>
1040auto operator*(const Other &a, const GeneratorParam<T> &b) -> decltype(a * (T)b) {
1041 return a * (T)b;
1042}
1043template<typename Other, typename T>
1044auto operator*(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a * b) {
1045 return (T)a * b;
1046}
1047// @}
1048
1049/** Division between GeneratorParam<T> and any type that supports operator/ with T.
1050 * Returns type of underlying operator/. */
1051// @{
1052template<typename Other, typename T>
1053auto operator/(const Other &a, const GeneratorParam<T> &b) -> decltype(a / (T)b) {
1054 return a / (T)b;
1055}
1056template<typename Other, typename T>
1057auto operator/(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a / b) {
1058 return (T)a / b;
1059}
1060// @}
1061
1062/** Modulo between GeneratorParam<T> and any type that supports operator% with T.
1063 * Returns type of underlying operator%. */
1064// @{
1065template<typename Other, typename T>
1066auto operator%(const Other &a, const GeneratorParam<T> &b) -> decltype(a % (T)b) {
1067 return a % (T)b;
1068}
1069template<typename Other, typename T>
1070auto operator%(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a % b) {
1071 return (T)a % b;
1072}
1073// @}
1074
1075/** Greater than comparison between GeneratorParam<T> and any type that supports operator> with T.
1076 * Returns type of underlying operator>. */
1077// @{
1078template<typename Other, typename T>
1079auto operator>(const Other &a, const GeneratorParam<T> &b) -> decltype(a > (T)b) {
1080 return a > (T)b;
1081}
1082template<typename Other, typename T>
1083auto operator>(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a > b) {
1084 return (T)a > b;
1085}
1086// @}
1087
1088/** Less than comparison between GeneratorParam<T> and any type that supports operator< with T.
1089 * Returns type of underlying operator<. */
1090// @{
1091template<typename Other, typename T>
1092auto operator<(const Other &a, const GeneratorParam<T> &b) -> decltype(a < (T)b) {
1093 return a < (T)b;
1094}
1095template<typename Other, typename T>
1096auto operator<(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a < b) {
1097 return (T)a < b;
1098}
1099// @}
1100
1101/** Greater than or equal comparison between GeneratorParam<T> and any type that supports operator>= with T.
1102 * Returns type of underlying operator>=. */
1103// @{
1104template<typename Other, typename T>
1105auto operator>=(const Other &a, const GeneratorParam<T> &b) -> decltype(a >= (T)b) {
1106 return a >= (T)b;
1107}
1108template<typename Other, typename T>
1109auto operator>=(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a >= b) {
1110 return (T)a >= b;
1111}
1112// @}
1113
1114/** Less than or equal comparison between GeneratorParam<T> and any type that supports operator<= with T.
1115 * Returns type of underlying operator<=. */
1116// @{
1117template<typename Other, typename T>
1118auto operator<=(const Other &a, const GeneratorParam<T> &b) -> decltype(a <= (T)b) {
1119 return a <= (T)b;
1120}
1121template<typename Other, typename T>
1122auto operator<=(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a <= b) {
1123 return (T)a <= b;
1124}
1125// @}
1126
1127/** Equality comparison between GeneratorParam<T> and any type that supports operator== with T.
1128 * Returns type of underlying operator==. */
1129// @{
1130template<typename Other, typename T>
1131auto operator==(const Other &a, const GeneratorParam<T> &b) -> decltype(a == (T)b) {
1132 return a == (T)b;
1133}
1134template<typename Other, typename T>
1135auto operator==(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a == b) {
1136 return (T)a == b;
1137}
1138// @}
1139
1140/** Inequality comparison between between GeneratorParam<T> and any type that supports operator!= with T.
1141 * Returns type of underlying operator!=. */
1142// @{
1143template<typename Other, typename T>
1144auto operator!=(const Other &a, const GeneratorParam<T> &b) -> decltype(a != (T)b) {
1145 return a != (T)b;
1146}
1147template<typename Other, typename T>
1148auto operator!=(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a != b) {
1149 return (T)a != b;
1150}
1151// @}
1152
1153/** Logical and between between GeneratorParam<T> and any type that supports operator&& with T.
1154 * Returns type of underlying operator&&. */
1155// @{
1156template<typename Other, typename T>
1157auto operator&&(const Other &a, const GeneratorParam<T> &b) -> decltype(a && (T)b) {
1158 return a && (T)b;
1159}
1160template<typename Other, typename T>
1161auto operator&&(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a && b) {
1162 return (T)a && b;
1163}
1164template<typename T>
1165auto operator&&(const GeneratorParam<T> &a, const GeneratorParam<T> &b) -> decltype((T)a && (T)b) {
1166 return (T)a && (T)b;
1167}
1168// @}
1169
1170/** Logical or between between GeneratorParam<T> and any type that supports operator|| with T.
1171 * Returns type of underlying operator||. */
1172// @{
1173template<typename Other, typename T>
1174auto operator||(const Other &a, const GeneratorParam<T> &b) -> decltype(a || (T)b) {
1175 return a || (T)b;
1176}
1177template<typename Other, typename T>
1178auto operator||(const GeneratorParam<T> &a, const Other &b) -> decltype((T)a || b) {
1179 return (T)a || b;
1180}
1181template<typename T>
1182auto operator||(const GeneratorParam<T> &a, const GeneratorParam<T> &b) -> decltype((T)a || (T)b) {
1183 return (T)a || (T)b;
1184}
1185// @}
1186
1187/* min and max are tricky as the language support for these is in the std
1188 * namespace. In order to make this work, forwarding functions are used that
1189 * are declared in a namespace that has std::min and std::max in scope.
1190 */
1191namespace Internal {
1192namespace GeneratorMinMax {
1193
1194using std::max;
1195using std::min;
1196
1197template<typename Other, typename T>
1198auto min_forward(const Other &a, const GeneratorParam<T> &b) -> decltype(min(a, (T)b)) {
1199 return min(a, (T)b);
1200}
1201template<typename Other, typename T>
1202auto min_forward(const GeneratorParam<T> &a, const Other &b) -> decltype(min((T)a, b)) {
1203 return min((T)a, b);
1204}
1205
1206template<typename Other, typename T>
1207auto max_forward(const Other &a, const GeneratorParam<T> &b) -> decltype(max(a, (T)b)) {
1208 return max(a, (T)b);
1209}
1210template<typename Other, typename T>
1211auto max_forward(const GeneratorParam<T> &a, const Other &b) -> decltype(max((T)a, b)) {
1212 return max((T)a, b);
1213}
1214
1215} // namespace GeneratorMinMax
1216} // namespace Internal
1217
1218/** Compute minimum between GeneratorParam<T> and any type that supports min with T.
1219 * Will automatically import std::min. Returns type of underlying min call. */
1220// @{
1221template<typename Other, typename T>
1222auto min(const Other &a, const GeneratorParam<T> &b) -> decltype(Internal::GeneratorMinMax::min_forward(a, b)) {
1224}
1225template<typename Other, typename T>
1226auto min(const GeneratorParam<T> &a, const Other &b) -> decltype(Internal::GeneratorMinMax::min_forward(a, b)) {
1228}
1229// @}
1230
1231/** Compute the maximum value between GeneratorParam<T> and any type that supports max with T.
1232 * Will automatically import std::max. Returns type of underlying max call. */
1233// @{
1234template<typename Other, typename T>
1235auto max(const Other &a, const GeneratorParam<T> &b) -> decltype(Internal::GeneratorMinMax::max_forward(a, b)) {
1237}
1238template<typename Other, typename T>
1239auto max(const GeneratorParam<T> &a, const Other &b) -> decltype(Internal::GeneratorMinMax::max_forward(a, b)) {
1241}
1242// @}
1243
1244/** Not operator for GeneratorParam */
1245template<typename T>
1246auto operator!(const GeneratorParam<T> &a) -> decltype(!(T)a) {
1247 return !(T)a;
1248}
1249
1250namespace Internal {
1251
1252template<typename T2>
1253class GeneratorInput_Buffer;
1254
1255/**
1256 * StubInputBuffer is the placeholder that a Stub uses when it requires
1257 * a Buffer for an input (rather than merely a Func or Expr). It is constructed
1258 * to allow only two possible sorts of input:
1259 * -- Assignment of an Input<Buffer<>>, with compatible type and dimensions,
1260 * essentially allowing us to pipe a parameter from an enclosing Generator to an internal Stub.
1261 * -- Assignment of a Buffer<>, with compatible type and dimensions,
1262 * causing the Input<Buffer<>> to become a precompiled buffer in the generated code.
1263 */
1266 friend class StubInput;
1267 template<typename T2>
1269 template<typename T2, int D2>
1270 friend class StubInputBuffer;
1271
1272 Parameter parameter_;
1273
1275 : parameter_(p) {
1276 // Create an empty 1-element buffer with the right runtime typing and dimensions,
1277 // which we'll use only to pass to can_convert_from() to verify this
1278 // Parameter is compatible with our constraints.
1279 Buffer<> other(p.type(), nullptr, std::vector<int>(p.dimensions(), 1));
1281 }
1282
1283 template<typename T2, int D2>
1284 HALIDE_NO_USER_CODE_INLINE static Parameter parameter_from_buffer(const Buffer<T2, D2> &b) {
1287 Parameter p(b.type(), true, b.dimensions());
1288 p.set_buffer(b);
1289 return p;
1290 }
1291
1292public:
1293 StubInputBuffer() = default;
1294
1295 // *not* explicit -- this ctor should only be used when you want
1296 // to pass a literal Buffer<> for a Stub Input; this Buffer<> will be
1297 // compiled into the Generator's product, rather than becoming
1298 // a runtime Parameter.
1299 template<typename T2, int D2>
1301 : parameter_(parameter_from_buffer(b)) {
1302 }
1303
1304 template<typename T2>
1305 static std::vector<Parameter> to_parameter_vector(const StubInputBuffer<T2> &t) {
1306 return {t.parameter_};
1307 }
1308
1309 template<typename T2>
1310 static std::vector<Parameter> to_parameter_vector(const std::vector<StubInputBuffer<T2>> &v) {
1311 std::vector<Parameter> r;
1312 r.reserve(v.size());
1313 for (const auto &s : v) {
1314 r.push_back(s.parameter_);
1315 }
1316 return r;
1317 }
1318};
1319
1320class AbstractGenerator;
1321
1323protected:
1325 std::shared_ptr<AbstractGenerator> generator;
1326
1328
1330 explicit StubOutputBufferBase(const Func &f, const std::shared_ptr<AbstractGenerator> &generator);
1331
1332public:
1333 Realization realize(std::vector<int32_t> sizes);
1334
1335 template<typename... Args>
1337 return f.realize(std::forward<Args>(args)..., get_target());
1338 }
1339
1340 template<typename Dst>
1341 void realize(Dst dst) {
1342 f.realize(dst, get_target());
1343 }
1344};
1345
1346/**
1347 * StubOutputBuffer is the placeholder that a Stub uses when it requires
1348 * a Buffer for an output (rather than merely a Func). It is constructed
1349 * to allow only two possible sorts of things:
1350 * -- Assignment to an Output<Buffer<>>, with compatible type and dimensions,
1351 * essentially allowing us to pipe a parameter from the result of a Stub to an
1352 * enclosing Generator
1353 * -- Realization into a Buffer<>; this is useful only in JIT compilation modes
1354 * (and shouldn't be usable otherwise)
1355 *
1356 * It is deliberate that StubOutputBuffer is not (easily) convertible to Func.
1357 */
1358template<typename T = void>
1360 template<typename T2>
1362 explicit StubOutputBuffer(const Func &fn, const std::shared_ptr<AbstractGenerator> &gen)
1363 : StubOutputBufferBase(fn, gen) {
1364 }
1365
1366public:
1367 StubOutputBuffer() = default;
1368
1369 static std::vector<StubOutputBuffer<T>> to_output_buffers(const std::vector<Func> &v,
1370 const std::shared_ptr<AbstractGenerator> &gen) {
1371 std::vector<StubOutputBuffer<T>> result;
1372 for (const Func &f : v) {
1373 result.push_back(StubOutputBuffer<T>(f, gen));
1374 }
1375 return result;
1376 }
1377};
1378
1379// This is a union-like class that allows for convenient initialization of Stub Inputs
1380// via initializer-list syntax; it is only used in situations where the
1381// downstream consumer will be able to explicitly check that each value is
1382// of the expected/required kind.
1384 const ArgInfoKind kind_;
1385 // Exactly one of the following fields should be defined:
1386 const Parameter parameter_;
1387 const Func func_;
1388 const Expr expr_;
1389
1390public:
1391 // *not* explicit.
1392 template<typename T2>
1394 : kind_(ArgInfoKind::Buffer), parameter_(b.parameter_), func_(), expr_() {
1395 }
1397 : kind_(ArgInfoKind::Buffer), parameter_(p), func_(), expr_() {
1398 }
1399 StubInput(const Func &f)
1400 : kind_(ArgInfoKind::Function), parameter_(), func_(f), expr_() {
1401 }
1402 StubInput(const Expr &e)
1403 : kind_(ArgInfoKind::Scalar), parameter_(), func_(), expr_(e) {
1404 }
1405
1407 return kind_;
1408 }
1409
1412 return parameter_;
1413 }
1414
1415 Func func() const {
1417 return func_;
1418 }
1419
1420 Expr expr() const {
1422 return expr_;
1423 }
1424};
1425
1426/** GIOBase is the base class for all GeneratorInput<> and GeneratorOutput<>
1427 * instantiations; it is not part of the public API and should never be
1428 * used directly by user code.
1429 *
1430 * Every GIOBase instance can be either a single value or an array-of-values;
1431 * each of these values can be an Expr or a Func. (Note that for an
1432 * array-of-values, the types/dimensions of all values in the array must match.)
1433 *
1434 * A GIOBase can have multiple Types, in which case it represents a Tuple.
1435 * (Note that Tuples are currently only supported for GeneratorOutput, but
1436 * it is likely that GeneratorInput will be extended to support Tuple as well.)
1437 *
1438 * The array-size, type(s), and dimensions can all be left "unspecified" at
1439 * creation time, in which case they may assume values provided by a Stub.
1440 * (It is important to note that attempting to use a GIOBase with unspecified
1441 * values will assert-fail; you must ensure that all unspecified values are
1442 * filled in prior to use.)
1443 */
1444class GIOBase {
1445public:
1446 virtual ~GIOBase() = default;
1447
1448 // These should only be called from configure() methods.
1449 // TODO: find a way to enforce this. Better yet, find a way to remove these.
1450 void set_type(const Type &type);
1452 void set_array_size(int size);
1453
1454protected:
1456 size_t array_size() const;
1457 virtual bool is_array() const;
1458
1459 const std::string &name() const;
1461
1462 bool gio_types_defined() const;
1463 const std::vector<Type> &gio_types() const;
1465
1466 bool dims_defined() const;
1467 int dims() const;
1468
1469 const std::vector<Func> &funcs() const;
1470 const std::vector<Expr> &exprs() const;
1471
1473 const std::string &name,
1475 const std::vector<Type> &types,
1476 int dims);
1477
1478 friend class GeneratorBase;
1480
1481 mutable int array_size_; // always 1 if is_array() == false.
1482 // -1 if is_array() == true but unspecified.
1483
1484 const std::string name_;
1486 mutable std::vector<Type> types_; // empty if type is unspecified
1487 mutable int dims_; // -1 if dim is unspecified
1488
1489 // Exactly one of these will have nonzero length
1490 std::vector<Func> funcs_;
1491 std::vector<Expr> exprs_;
1492
1493 // Generator which owns this Input or Output. Note that this will be null
1494 // initially; the GeneratorBase itself will set this field when it initially
1495 // builds its info about params. However, since it isn't
1496 // appropriate for Input<> or Output<> to be declared outside of a Generator,
1497 // all reasonable non-testing code should expect this to be non-null.
1499
1500 std::string array_name(size_t i) const;
1501
1502 virtual void verify_internals();
1503
1504 void check_matching_array_size(size_t size) const;
1505 void check_matching_types(const std::vector<Type> &t) const;
1506 void check_matching_dims(int d) const;
1507
1508 template<typename ElemType>
1509 const std::vector<ElemType> &get_values() const;
1510
1511 void check_gio_access() const;
1512
1513 virtual void check_value_writable() const = 0;
1514
1515 virtual const char *input_or_output() const = 0;
1516
1517private:
1518 template<typename T>
1520 friend class GeneratorStub;
1521
1522public:
1523 GIOBase(const GIOBase &) = delete;
1524 GIOBase &operator=(const GIOBase &) = delete;
1525 GIOBase(GIOBase &&) = delete;
1527};
1528
1529template<>
1530inline const std::vector<Expr> &GIOBase::get_values<Expr>() const {
1531 return exprs();
1532}
1533
1534template<>
1535inline const std::vector<Func> &GIOBase::get_values<Func>() const {
1536 return funcs();
1537}
1538
1540protected:
1542 const std::string &name,
1544 const std::vector<Type> &t,
1545 int d);
1546
1547 GeneratorInputBase(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d);
1548
1549 friend class GeneratorBase;
1551
1552 std::vector<Parameter> parameters_;
1553
1555
1557 void set_inputs(const std::vector<StubInput> &inputs);
1558 bool inputs_set = false;
1559
1560 virtual void set_def_min_max();
1561
1562 void verify_internals() override;
1563
1564 friend class StubEmitter;
1565
1566 virtual std::string get_c_type() const = 0;
1567
1568 void check_value_writable() const override;
1569
1570 const char *input_or_output() const override {
1571 return "Input";
1572 }
1573
1574 void set_estimate_impl(const Var &var, const Expr &min, const Expr &extent);
1575 void set_estimates_impl(const Region &estimates);
1576
1577public:
1579};
1580
1581template<typename T, typename ValueType>
1583protected:
1584 using TBase = typename std::remove_all_extents<T>::type;
1585
1586 bool is_array() const override {
1587 return std::is_array<T>::value;
1588 }
1589
1590 template<typename T2 = T, typename std::enable_if<
1591 // Only allow T2 not-an-array
1592 !std::is_array<T2>::value>::type * = nullptr>
1593 GeneratorInputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
1594 : GeneratorInputBase(name, kind, t, d) {
1595 }
1596
1597 template<typename T2 = T, typename std::enable_if<
1598 // Only allow T2[kSomeConst]
1599 std::is_array<T2>::value && std::rank<T2>::value == 1 && (std::extent<T2, 0>::value > 0)>::type * = nullptr>
1600 GeneratorInputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
1601 : GeneratorInputBase(std::extent<T2, 0>::value, name, kind, t, d) {
1602 }
1603
1604 template<typename T2 = T, typename std::enable_if<
1605 // Only allow T2[]
1606 std::is_array<T2>::value && std::rank<T2>::value == 1 && std::extent<T2, 0>::value == 0>::type * = nullptr>
1607 GeneratorInputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
1608 : GeneratorInputBase(-1, name, kind, t, d) {
1609 }
1610
1611public:
1613 size_t size() const {
1614 this->check_gio_access();
1615 return get_values<ValueType>().size();
1616 }
1617
1619 const ValueType &operator[](size_t i) const {
1620 this->check_gio_access();
1621 return get_values<ValueType>()[i];
1622 }
1623
1625 const ValueType &at(size_t i) const {
1626 this->check_gio_access();
1627 return get_values<ValueType>().at(i);
1628 }
1629
1631 typename std::vector<ValueType>::const_iterator begin() const {
1632 this->check_gio_access();
1633 return get_values<ValueType>().begin();
1634 }
1635
1637 typename std::vector<ValueType>::const_iterator end() const {
1638 this->check_gio_access();
1639 return get_values<ValueType>().end();
1640 }
1641};
1642
1643// When forwarding methods to ImageParam, Func, etc., we must take
1644// care with the return types: many of the methods return a reference-to-self
1645// (e.g., ImageParam&); since we create temporaries for most of these forwards,
1646// returning a ref will crater because it refers to a now-defunct section of the
1647// stack. Happily, simply removing the reference is solves this, since all of the
1648// types in question satisfy the property of copies referring to the same underlying
1649// structure (returning references is just an optimization). Since this is verbose
1650// and used in several places, we'll use a helper macro:
1651#define HALIDE_FORWARD_METHOD(Class, Method) \
1652 template<typename... Args> \
1653 inline auto Method(Args &&...args)->typename std::remove_reference<decltype(std::declval<Class>().Method(std::forward<Args>(args)...))>::type { \
1654 return this->template as<Class>().Method(std::forward<Args>(args)...); \
1655 }
1656
1657#define HALIDE_FORWARD_METHOD_CONST(Class, Method) \
1658 template<typename... Args> \
1659 inline auto Method(Args &&...args) const-> \
1660 typename std::remove_reference<decltype(std::declval<Class>().Method(std::forward<Args>(args)...))>::type { \
1661 this->check_gio_access(); \
1662 return this->template as<Class>().Method(std::forward<Args>(args)...); \
1663 }
1664
1665template<typename T>
1667private:
1669
1670protected:
1671 using TBase = typename Super::TBase;
1672
1673 friend class ::Halide::Func;
1674 friend class ::Halide::Stage;
1675
1676 std::string get_c_type() const override {
1677 if (TBase::has_static_halide_type) {
1678 return "Halide::Internal::StubInputBuffer<" +
1679 halide_type_to_c_type(TBase::static_halide_type()) +
1680 ">";
1681 } else {
1682 return "Halide::Internal::StubInputBuffer<>";
1683 }
1684 }
1685
1686 template<typename T2>
1687 inline T2 as() const {
1688 return (T2) * this;
1689 }
1690
1691public:
1692 explicit GeneratorInput_Buffer(const std::string &name)
1694 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
1695 TBase::has_static_dimensions ? TBase::static_dimensions() : -1) {
1696 }
1697
1698 GeneratorInput_Buffer(const std::string &name, const Type &t, int d)
1699 : Super(name, ArgInfoKind::Buffer, {t}, d) {
1700 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Input<Buffer<T>> if T is void or omitted.");
1701 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Input<Buffer<T, D>> if D is -1 or omitted.");
1702 }
1703
1704 GeneratorInput_Buffer(const std::string &name, const Type &t)
1705 : Super(name, ArgInfoKind::Buffer, {t}, -1) {
1706 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Input<Buffer<T>> if T is void or omitted.");
1707 }
1708
1709 GeneratorInput_Buffer(const std::string &name, int d)
1711 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
1712 d) {
1713 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Input<Buffer<T, D>> if D is -1 or omitted.");
1714 }
1715
1716 template<typename... Args>
1717 Expr operator()(Args &&...args) const {
1718 this->check_gio_access();
1719 return Func(*this)(std::forward<Args>(args)...);
1720 }
1721
1722 Expr operator()(std::vector<Expr> args) const {
1723 this->check_gio_access();
1724 return Func(*this)(std::move(args));
1725 }
1726
1727 template<typename T2>
1728 operator StubInputBuffer<T2>() const {
1729 user_assert(!this->is_array()) << "Cannot assign an array type to a non-array type for Input " << this->name();
1730 return StubInputBuffer<T2>(this->parameters_.at(0));
1731 }
1732
1733 operator Func() const {
1734 this->check_gio_access();
1735 return this->funcs().at(0);
1736 }
1737
1738 operator ExternFuncArgument() const {
1739 this->check_gio_access();
1740 return ExternFuncArgument(this->parameters_.at(0));
1741 }
1742
1744 this->check_gio_access();
1745 this->set_estimate_impl(var, min, extent);
1746 return *this;
1747 }
1748
1750 this->check_gio_access();
1751 this->set_estimates_impl(estimates);
1752 return *this;
1753 }
1754
1756 this->check_gio_access();
1757 return Func(*this).in();
1758 }
1759
1760 Func in(const Func &other) {
1761 this->check_gio_access();
1762 return Func(*this).in(other);
1763 }
1764
1765 Func in(const std::vector<Func> &others) {
1766 this->check_gio_access();
1767 return Func(*this).in(others);
1768 }
1769
1770 operator ImageParam() const {
1771 this->check_gio_access();
1772 user_assert(!this->is_array()) << "Cannot convert an Input<Buffer<>[]> to an ImageParam; use an explicit subscript operator: " << this->name();
1773 return ImageParam(this->parameters_.at(0), Func(*this));
1774 }
1775
1777 size_t size() const {
1778 this->check_gio_access();
1779 return this->parameters_.size();
1780 }
1781
1783 ImageParam operator[](size_t i) const {
1784 this->check_gio_access();
1785 return ImageParam(this->parameters_.at(i), this->funcs().at(i));
1786 }
1787
1789 ImageParam at(size_t i) const {
1790 this->check_gio_access();
1791 return ImageParam(this->parameters_.at(i), this->funcs().at(i));
1792 }
1793
1795 typename std::vector<ImageParam>::const_iterator begin() const {
1796 user_error << "Input<Buffer<>>::begin() is not supported.";
1797 return {};
1798 }
1799
1801 typename std::vector<ImageParam>::const_iterator end() const {
1802 user_error << "Input<Buffer<>>::end() is not supported.";
1803 return {};
1804 }
1805
1806 /** Forward methods to the ImageParam. */
1807 // @{
1811 HALIDE_FORWARD_METHOD(ImageParam, set_host_alignment)
1824 // }@
1825};
1826
1827template<typename T>
1829private:
1831
1832protected:
1833 using TBase = typename Super::TBase;
1834
1835 std::string get_c_type() const override {
1836 return "Func";
1837 }
1838
1839 template<typename T2>
1840 inline T2 as() const {
1841 return (T2) * this;
1842 }
1843
1844public:
1845 GeneratorInput_Func(const std::string &name, const Type &t, int d)
1846 : Super(name, ArgInfoKind::Function, {t}, d) {
1847 }
1848
1849 // unspecified type
1850 GeneratorInput_Func(const std::string &name, int d)
1851 : Super(name, ArgInfoKind::Function, {}, d) {
1852 }
1853
1854 // unspecified dimension
1855 GeneratorInput_Func(const std::string &name, const Type &t)
1856 : Super(name, ArgInfoKind::Function, {t}, -1) {
1857 }
1858
1859 // unspecified type & dimension
1860 explicit GeneratorInput_Func(const std::string &name)
1861 : Super(name, ArgInfoKind::Function, {}, -1) {
1862 }
1863
1864 GeneratorInput_Func(size_t array_size, const std::string &name, const Type &t, int d)
1865 : Super(array_size, name, ArgInfoKind::Function, {t}, d) {
1866 }
1867
1868 // unspecified type
1869 GeneratorInput_Func(size_t array_size, const std::string &name, int d)
1871 }
1872
1873 // unspecified dimension
1874 GeneratorInput_Func(size_t array_size, const std::string &name, const Type &t)
1875 : Super(array_size, name, ArgInfoKind::Function, {t}, -1) {
1876 }
1877
1878 // unspecified type & dimension
1879 GeneratorInput_Func(size_t array_size, const std::string &name)
1880 : Super(array_size, name, ArgInfoKind::Function, {}, -1) {
1881 }
1882
1883 template<typename... Args>
1884 Expr operator()(Args &&...args) const {
1885 this->check_gio_access();
1886 return this->funcs().at(0)(std::forward<Args>(args)...);
1887 }
1888
1889 Expr operator()(const std::vector<Expr> &args) const {
1890 this->check_gio_access();
1891 return this->funcs().at(0)(args);
1892 }
1893
1894 operator Func() const {
1895 this->check_gio_access();
1896 return this->funcs().at(0);
1897 }
1898
1899 operator ExternFuncArgument() const {
1900 this->check_gio_access();
1901 return ExternFuncArgument(this->parameters_.at(0));
1902 }
1903
1905 this->check_gio_access();
1906 this->set_estimate_impl(var, min, extent);
1907 return *this;
1908 }
1909
1911 this->check_gio_access();
1912 this->set_estimates_impl(estimates);
1913 return *this;
1914 }
1915
1917 this->check_gio_access();
1918 return Func(*this).in();
1919 }
1920
1921 Func in(const Func &other) {
1922 this->check_gio_access();
1923 return Func(*this).in(other);
1924 }
1925
1926 Func in(const std::vector<Func> &others) {
1927 this->check_gio_access();
1928 return Func(*this).in(others);
1929 }
1930
1931 /** Forward const methods to the underlying Func. (Non-const methods
1932 * aren't available for Input<Func>.) */
1933 // @{
1937 HALIDE_FORWARD_METHOD_CONST(Func, has_update_definition)
1938 HALIDE_FORWARD_METHOD_CONST(Func, num_update_definitions)
1943 HALIDE_FORWARD_METHOD_CONST(Func, update_args)
1944 HALIDE_FORWARD_METHOD_CONST(Func, update_value)
1945 HALIDE_FORWARD_METHOD_CONST(Func, update_values)
1948 // }@
1949};
1950
1951template<typename T>
1953private:
1955
1956 static_assert(std::is_same<typename std::remove_all_extents<T>::type, Expr>::value, "GeneratorInput_DynamicScalar is only legal to use with T=Expr for now");
1957
1958protected:
1959 std::string get_c_type() const override {
1960 return "Expr";
1961 }
1962
1963public:
1964 explicit GeneratorInput_DynamicScalar(const std::string &name)
1965 : Super(name, ArgInfoKind::Scalar, {}, 0) {
1966 user_assert(!std::is_array<T>::value) << "Input<Expr[]> is not allowed";
1967 }
1968
1969 /** You can use this Input as an expression in a halide
1970 * function definition */
1971 operator Expr() const {
1972 this->check_gio_access();
1973 return this->exprs().at(0);
1974 }
1975
1976 /** Using an Input as the argument to an external stage treats it
1977 * as an Expr */
1978 operator ExternFuncArgument() const {
1979 this->check_gio_access();
1980 return ExternFuncArgument(this->exprs().at(0));
1981 }
1982
1983 void set_estimate(const Expr &value) {
1984 this->check_gio_access();
1985 for (Parameter &p : this->parameters_) {
1986 p.set_estimate(value);
1987 }
1988 }
1989
1990 Type type() const {
1991 return Expr(*this).type();
1992 }
1993};
1994
1995template<typename T>
1997private:
1999
2000protected:
2001 using TBase = typename Super::TBase;
2002
2003 const TBase def_{TBase()};
2005
2006 void set_def_min_max() override {
2007 for (Parameter &p : this->parameters_) {
2008 // No: we want to leave the Parameter unset here.
2009 // p.set_scalar<TBase>(def_);
2011 }
2012 }
2013
2014 std::string get_c_type() const override {
2015 return "Expr";
2016 }
2017
2018 // Expr() doesn't accept a pointer type in its ctor; add a SFINAE adapter
2019 // so that pointer (aka handle) Inputs will get cast to uint64.
2021 static Expr TBaseToExpr(const TBase2 &value) {
2022 return cast<TBase>(Expr(value));
2023 }
2024
2026 static Expr TBaseToExpr(const TBase2 &value) {
2027 user_assert(value == 0) << "Zero is the only legal default value for Inputs which are pointer types.\n";
2028 return Expr();
2029 }
2030
2031public:
2032 explicit GeneratorInput_Scalar(const std::string &name)
2033 : Super(name, ArgInfoKind::Scalar, {type_of<TBase>()}, 0), def_(static_cast<TBase>(0)), def_expr_(Expr()) {
2034 }
2035
2036 GeneratorInput_Scalar(const std::string &name, const TBase &def)
2038 }
2039
2041 const std::string &name)
2042 : Super(array_size, name, ArgInfoKind::Scalar, {type_of<TBase>()}, 0), def_(static_cast<TBase>(0)), def_expr_(Expr()) {
2043 }
2044
2046 const std::string &name,
2047 const TBase &def)
2049 }
2050
2051 /** You can use this Input as an expression in a halide
2052 * function definition */
2053 operator Expr() const {
2054 this->check_gio_access();
2055 return this->exprs().at(0);
2056 }
2057
2058 /** Using an Input as the argument to an external stage treats it
2059 * as an Expr */
2060 operator ExternFuncArgument() const {
2061 this->check_gio_access();
2062 return ExternFuncArgument(this->exprs().at(0));
2063 }
2064
2066 void set_estimate(const TBase &value) {
2067 this->check_gio_access();
2068 user_assert(value == nullptr) << "nullptr is the only valid estimate for Input<PointerType>";
2070 for (Parameter &p : this->parameters_) {
2071 p.set_estimate(e);
2072 }
2073 }
2074
2076 void set_estimate(const TBase &value) {
2077 this->check_gio_access();
2078 Expr e = Expr(value);
2079 if (std::is_same<T2, bool>::value) {
2080 e = cast<bool>(e);
2081 }
2082 for (Parameter &p : this->parameters_) {
2083 p.set_estimate(e);
2084 }
2085 }
2086
2088 void set_estimate(size_t index, const TBase &value) {
2089 this->check_gio_access();
2090 Expr e = Expr(value);
2091 if (std::is_same<T2, bool>::value) {
2092 e = cast<bool>(e);
2093 }
2094 this->parameters_.at(index).set_estimate(e);
2095 }
2096
2097 Type type() const {
2098 return Expr(*this).type();
2099 }
2100};
2101
2102template<typename T>
2104private:
2106
2107protected:
2108 using TBase = typename Super::TBase;
2109
2111
2112 void set_def_min_max() override {
2114 // Don't set min/max for bool
2115 if (!std::is_same<TBase, bool>::value) {
2116 for (Parameter &p : this->parameters_) {
2117 if (min_.defined()) {
2118 p.set_min_value(min_);
2119 }
2120 if (max_.defined()) {
2121 p.set_max_value(max_);
2122 }
2123 }
2124 }
2125 }
2126
2127public:
2128 explicit GeneratorInput_Arithmetic(const std::string &name)
2129 : Super(name), min_(Expr()), max_(Expr()) {
2130 }
2131
2133 const TBase &def)
2134 : Super(name, def), min_(Expr()), max_(Expr()) {
2135 }
2136
2138 const std::string &name)
2139 : Super(array_size, name), min_(Expr()), max_(Expr()) {
2140 }
2141
2143 const std::string &name,
2144 const TBase &def)
2145 : Super(array_size, name, def), min_(Expr()), max_(Expr()) {
2146 }
2147
2149 const TBase &def,
2150 const TBase &min,
2151 const TBase &max)
2152 : Super(name, def), min_(min), max_(max) {
2153 }
2154
2156 const std::string &name,
2157 const TBase &def,
2158 const TBase &min,
2159 const TBase &max)
2160 : Super(array_size, name, def), min_(min), max_(max) {
2161 }
2162};
2163
2164template<typename>
2166 typedef void type;
2167};
2168
2169template<typename T2, typename = void>
2170struct has_static_halide_type_method : std::false_type {};
2171
2172template<typename T2>
2173struct has_static_halide_type_method<T2, typename type_sink<decltype(T2::static_halide_type())>::type> : std::true_type {};
2174
2177 typename select_type<
2183
2184} // namespace Internal
2185
2186template<typename T>
2188private:
2190
2191protected:
2192 using TBase = typename Super::TBase;
2193
2194 // Trick to avoid ambiguous ctor between Func-with-dim and int-with-default-value;
2195 // since we can't use std::enable_if on ctors, define the argument to be one that
2196 // can only be properly resolved for TBase=Func.
2197 struct Unused;
2199 typename Internal::select_type<
2203
2204public:
2205 // Mark all of these explicit (not just single-arg versions) so that
2206 // we disallow copy-list-initialization form (i.e., Input foo{"foo"} is ok,
2207 // but Input foo = {"foo"} is not).
2208 explicit GeneratorInput(const std::string &name)
2209 : Super(name) {
2210 }
2211
2212 explicit GeneratorInput(const std::string &name, const TBase &def)
2213 : Super(name, def) {
2214 }
2215
2216 explicit GeneratorInput(size_t array_size, const std::string &name, const TBase &def)
2217 : Super(array_size, name, def) {
2218 }
2219
2220 explicit GeneratorInput(const std::string &name,
2221 const TBase &def, const TBase &min, const TBase &max)
2222 : Super(name, def, min, max) {
2223 }
2224
2225 explicit GeneratorInput(size_t array_size, const std::string &name,
2226 const TBase &def, const TBase &min, const TBase &max)
2227 : Super(array_size, name, def, min, max) {
2228 }
2229
2230 explicit GeneratorInput(const std::string &name, const Type &t, int d)
2231 : Super(name, t, d) {
2232 }
2233
2234 explicit GeneratorInput(const std::string &name, const Type &t)
2235 : Super(name, t) {
2236 }
2237
2238 // Avoid ambiguity between Func-with-dim and int-with-default
2239 explicit GeneratorInput(const std::string &name, IntIfNonScalar d)
2240 : Super(name, d) {
2241 }
2242
2243 explicit GeneratorInput(size_t array_size, const std::string &name, const Type &t, int d)
2244 : Super(array_size, name, t, d) {
2245 }
2246
2247 explicit GeneratorInput(size_t array_size, const std::string &name, const Type &t)
2248 : Super(array_size, name, t) {
2249 }
2250
2251 // Avoid ambiguity between Func-with-dim and int-with-default
2252 // template <typename T2 = T, typename std::enable_if<std::is_same<TBase, Func>::value>::type * = nullptr>
2253 explicit GeneratorInput(size_t array_size, const std::string &name, IntIfNonScalar d)
2254 : Super(array_size, name, d) {
2255 }
2256
2257 explicit GeneratorInput(size_t array_size, const std::string &name)
2258 : Super(array_size, name) {
2259 }
2260};
2261
2262namespace Internal {
2263
2265protected:
2268 static_assert(std::is_same<T2, Func>::value, "Only Func allowed here");
2270 internal_assert(exprs_.empty());
2271 user_assert(!funcs_.empty()) << "No funcs_ are defined yet";
2272 user_assert(funcs_.size() == 1) << "Use [] to access individual Funcs in Output<Func[]>";
2273 return funcs_[0];
2274 }
2275
2276public:
2277 /** Forward schedule-related methods to the underlying Func. */
2278 // @{
2279 HALIDE_FORWARD_METHOD(Func, add_trace_tag)
2280 HALIDE_FORWARD_METHOD(Func, align_bounds)
2281 HALIDE_FORWARD_METHOD(Func, align_extent)
2282 HALIDE_FORWARD_METHOD(Func, align_storage)
2283 HALIDE_FORWARD_METHOD(Func, always_partition)
2284 HALIDE_FORWARD_METHOD(Func, always_partition_all)
2287 HALIDE_FORWARD_METHOD(Func, bound_extent)
2288 HALIDE_FORWARD_METHOD(Func, compute_at)
2289 HALIDE_FORWARD_METHOD(Func, compute_inline)
2290 HALIDE_FORWARD_METHOD(Func, compute_root)
2291 HALIDE_FORWARD_METHOD(Func, compute_with)
2292 HALIDE_FORWARD_METHOD(Func, copy_to_device)
2293 HALIDE_FORWARD_METHOD(Func, copy_to_host)
2294 HALIDE_FORWARD_METHOD(Func, define_extern)
2297 HALIDE_FORWARD_METHOD(Func, fold_storage)
2300 HALIDE_FORWARD_METHOD(Func, gpu_blocks)
2301 HALIDE_FORWARD_METHOD(Func, gpu_single_thread)
2302 HALIDE_FORWARD_METHOD(Func, gpu_threads)
2303 HALIDE_FORWARD_METHOD(Func, gpu_tile)
2304 HALIDE_FORWARD_METHOD_CONST(Func, has_update_definition)
2305 HALIDE_FORWARD_METHOD(Func, hexagon)
2307 HALIDE_FORWARD_METHOD(Func, memoize)
2308 HALIDE_FORWARD_METHOD(Func, never_partition)
2309 HALIDE_FORWARD_METHOD(Func, never_partition_all)
2310 HALIDE_FORWARD_METHOD_CONST(Func, num_update_definitions)
2312 HALIDE_FORWARD_METHOD(Func, parallel)
2313 HALIDE_FORWARD_METHOD(Func, partition)
2314 HALIDE_FORWARD_METHOD(Func, prefetch)
2317 HALIDE_FORWARD_METHOD(Func, reorder)
2318 HALIDE_FORWARD_METHOD(Func, reorder_storage)
2321 HALIDE_FORWARD_METHOD(Func, set_estimate)
2322 HALIDE_FORWARD_METHOD(Func, specialize)
2323 HALIDE_FORWARD_METHOD(Func, specialize_fail)
2325 HALIDE_FORWARD_METHOD(Func, store_at)
2326 HALIDE_FORWARD_METHOD(Func, store_root)
2328 HALIDE_FORWARD_METHOD(Func, trace_stores)
2333 HALIDE_FORWARD_METHOD_CONST(Func, update_args)
2334 HALIDE_FORWARD_METHOD_CONST(Func, update_value)
2335 HALIDE_FORWARD_METHOD_CONST(Func, update_values)
2338 HALIDE_FORWARD_METHOD(Func, vectorize)
2339
2340 // }@
2341
2342#undef HALIDE_OUTPUT_FORWARD
2343#undef HALIDE_OUTPUT_FORWARD_CONST
2344
2345protected:
2347 const std::string &name,
2349 const std::vector<Type> &t,
2350 int d);
2351
2352 GeneratorOutputBase(const std::string &name,
2354 const std::vector<Type> &t,
2355 int d);
2356
2357 friend class GeneratorBase;
2358 friend class StubEmitter;
2359
2361 void resize(size_t size);
2362
2363 virtual std::string get_c_type() const {
2364 return "Func";
2365 }
2366
2367 void check_value_writable() const override;
2368
2369 const char *input_or_output() const override {
2370 return "Output";
2371 }
2372
2373public:
2375};
2376
2377template<typename T>
2379protected:
2380 using TBase = typename std::remove_all_extents<T>::type;
2382
2383 bool is_array() const override {
2384 return std::is_array<T>::value;
2385 }
2386
2387 template<typename T2 = T, typename std::enable_if<
2388 // Only allow T2 not-an-array
2389 !std::is_array<T2>::value>::type * = nullptr>
2390 GeneratorOutputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
2391 : GeneratorOutputBase(name, kind, t, d) {
2392 }
2393
2394 template<typename T2 = T, typename std::enable_if<
2395 // Only allow T2[kSomeConst]
2396 std::is_array<T2>::value && std::rank<T2>::value == 1 && (std::extent<T2, 0>::value > 0)>::type * = nullptr>
2397 GeneratorOutputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
2398 : GeneratorOutputBase(std::extent<T2, 0>::value, name, kind, t, d) {
2399 }
2400
2401 template<typename T2 = T, typename std::enable_if<
2402 // Only allow T2[]
2403 std::is_array<T2>::value && std::rank<T2>::value == 1 && std::extent<T2, 0>::value == 0>::type * = nullptr>
2404 GeneratorOutputImpl(const std::string &name, ArgInfoKind kind, const std::vector<Type> &t, int d)
2405 : GeneratorOutputBase(-1, name, kind, t, d) {
2406 }
2407
2408public:
2409 template<typename... Args, typename T2 = T, typename std::enable_if<!std::is_array<T2>::value>::type * = nullptr>
2410 FuncRef operator()(Args &&...args) const {
2411 this->check_gio_access();
2412 return get_values<ValueType>().at(0)(std::forward<Args>(args)...);
2413 }
2414
2416 FuncRef operator()(std::vector<ExprOrVar> args) const {
2417 this->check_gio_access();
2418 return get_values<ValueType>().at(0)(args);
2419 }
2420
2422 operator Func() const {
2423 this->check_gio_access();
2424 return get_values<ValueType>().at(0);
2425 }
2426
2428 operator Stage() const {
2429 this->check_gio_access();
2430 return get_values<ValueType>().at(0);
2431 }
2432
2434 size_t size() const {
2435 this->check_gio_access();
2436 return get_values<ValueType>().size();
2437 }
2438
2440 const ValueType &operator[](size_t i) const {
2441 this->check_gio_access();
2442 return get_values<ValueType>()[i];
2443 }
2444
2446 const ValueType &at(size_t i) const {
2447 this->check_gio_access();
2448 return get_values<ValueType>().at(i);
2449 }
2450
2452 typename std::vector<ValueType>::const_iterator begin() const {
2453 this->check_gio_access();
2454 return get_values<ValueType>().begin();
2455 }
2456
2458 typename std::vector<ValueType>::const_iterator end() const {
2459 this->check_gio_access();
2460 return get_values<ValueType>().end();
2461 }
2462
2463 template<typename T2 = T, typename std::enable_if<
2464 // Only allow T2[]
2465 std::is_array<T2>::value && std::rank<T2>::value == 1 && std::extent<T2, 0>::value == 0>::type * = nullptr>
2466 void resize(size_t size) {
2467 this->check_gio_access();
2469 }
2470};
2471
2472template<typename T>
2474private:
2476
2477 HALIDE_NO_USER_CODE_INLINE void assign_from_func(const Func &f) {
2478 this->check_value_writable();
2479
2481
2482 if (this->gio_types_defined()) {
2483 const auto &my_types = this->gio_types();
2484 user_assert(my_types.size() == f.types().size())
2485 << "Cannot assign Func \"" << f.name()
2486 << "\" to Output \"" << this->name() << "\"\n"
2487 << "Output " << this->name()
2488 << " is declared to have " << my_types.size() << " tuple elements"
2489 << " but Func " << f.name()
2490 << " has " << f.types().size() << " tuple elements.\n";
2491 for (size_t i = 0; i < my_types.size(); i++) {
2492 user_assert(my_types[i] == f.types().at(i))
2493 << "Cannot assign Func \"" << f.name()
2494 << "\" to Output \"" << this->name() << "\"\n"
2495 << (my_types.size() > 1 ? "In tuple element " + std::to_string(i) + ", " : "")
2496 << "Output " << this->name()
2497 << " has declared type " << my_types[i]
2498 << " but Func " << f.name()
2499 << " has type " << f.types().at(i) << "\n";
2500 }
2501 }
2502 if (this->dims_defined()) {
2503 user_assert(f.dimensions() == this->dims())
2504 << "Cannot assign Func \"" << f.name()
2505 << "\" to Output \"" << this->name() << "\"\n"
2506 << "Output " << this->name()
2507 << " has declared dimensionality " << this->dims()
2508 << " but Func " << f.name()
2509 << " has dimensionality " << f.dimensions() << "\n";
2510 }
2511
2512 internal_assert(this->exprs_.empty() && this->funcs_.size() == 1);
2513 user_assert(!this->funcs_.at(0).defined());
2514 this->funcs_[0] = f;
2515 }
2516
2517protected:
2518 using TBase = typename Super::TBase;
2519
2520 explicit GeneratorOutput_Buffer(const std::string &name)
2522 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
2523 TBase::has_static_dimensions ? TBase::static_dimensions() : -1) {
2524 }
2525
2526 GeneratorOutput_Buffer(const std::string &name, const std::vector<Type> &t, int d)
2527 : Super(name, ArgInfoKind::Buffer, t, d) {
2528 internal_assert(!t.empty());
2529 internal_assert(d != -1);
2530 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Output<Buffer<T, D>> if T is void or omitted.");
2531 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Output<Buffer<T, D>> if D is -1 or omitted.");
2532 }
2533
2534 GeneratorOutput_Buffer(const std::string &name, const std::vector<Type> &t)
2535 : Super(name, ArgInfoKind::Buffer, t, -1) {
2536 internal_assert(!t.empty());
2537 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Output<Buffer<T, D>> if T is void or omitted.");
2538 }
2539
2540 GeneratorOutput_Buffer(const std::string &name, int d)
2542 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
2543 d) {
2544 internal_assert(d != -1);
2545 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Output<Buffer<T, D>> if D is -1 or omitted.");
2546 }
2547
2548 GeneratorOutput_Buffer(size_t array_size, const std::string &name)
2550 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
2551 TBase::has_static_dimensions ? TBase::static_dimensions() : -1) {
2552 }
2553
2554 GeneratorOutput_Buffer(size_t array_size, const std::string &name, const std::vector<Type> &t, int d)
2555 : Super(array_size, name, ArgInfoKind::Buffer, t, d) {
2556 internal_assert(!t.empty());
2557 internal_assert(d != -1);
2558 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Output<Buffer<T, D>> if T is void or omitted.");
2559 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Output<Buffer<T, D>> if D is -1 or omitted.");
2560 }
2561
2562 GeneratorOutput_Buffer(size_t array_size, const std::string &name, const std::vector<Type> &t)
2563 : Super(array_size, name, ArgInfoKind::Buffer, t, -1) {
2564 internal_assert(!t.empty());
2565 static_assert(!TBase::has_static_halide_type, "You can only specify a Type argument for Output<Buffer<T, D>> if T is void or omitted.");
2566 }
2567
2568 GeneratorOutput_Buffer(size_t array_size, const std::string &name, int d)
2570 TBase::has_static_halide_type ? std::vector<Type>{TBase::static_halide_type()} : std::vector<Type>{},
2571 d) {
2572 internal_assert(d != -1);
2573 static_assert(!TBase::has_static_dimensions, "You can only specify a dimension argument for Output<Buffer<T, D>> if D is -1 or omitted.");
2574 }
2575
2576 HALIDE_NO_USER_CODE_INLINE std::string get_c_type() const override {
2577 if (TBase::has_static_halide_type) {
2578 return "Halide::Internal::StubOutputBuffer<" +
2579 halide_type_to_c_type(TBase::static_halide_type()) +
2580 ">";
2581 } else {
2582 return "Halide::Internal::StubOutputBuffer<>";
2583 }
2584 }
2585
2588 return (T2) * this;
2589 }
2590
2591public:
2592 // Allow assignment from a Buffer<> to an Output<Buffer<>>;
2593 // this allows us to use a statically-compiled buffer inside a Generator
2594 // to assign to an output.
2595 // TODO: This used to take the buffer as a const ref. This no longer works as
2596 // using it in a Pipeline might change the dev field so it is currently
2597 // not considered const. We should consider how this really ought to work.
2598 template<typename T2, int D2>
2600 this->check_gio_access();
2601 this->check_value_writable();
2602
2603 user_assert(T::can_convert_from(buffer))
2604 << "Cannot assign to the Output \"" << this->name()
2605 << "\": the expression is not convertible to the same Buffer type and/or dimensions.\n";
2606
2607 if (this->gio_types_defined()) {
2608 user_assert(Type(buffer.type()) == this->gio_type())
2609 << "Output " << this->name() << " should have type=" << this->gio_type() << " but saw type=" << Type(buffer.type()) << "\n";
2610 }
2611 if (this->dims_defined()) {
2612 user_assert(buffer.dimensions() == this->dims())
2613 << "Output " << this->name() << " should have dim=" << this->dims() << " but saw dim=" << buffer.dimensions() << "\n";
2614 }
2615
2616 internal_assert(this->exprs_.empty() && this->funcs_.size() == 1);
2617 user_assert(!this->funcs_.at(0).defined());
2618 this->funcs_.at(0)(_) = buffer(_);
2619
2620 return *this;
2621 }
2622
2623 // Allow assignment from a StubOutputBuffer to an Output<Buffer>;
2624 // this allows us to pipeline the results of a Stub to the results
2625 // of the enclosing Generator.
2626 template<typename T2>
2628 this->check_gio_access();
2629 assign_from_func(stub_output_buffer.f);
2630 return *this;
2631 }
2632
2633 // Allow assignment from a Func to an Output<Buffer>;
2634 // this allows us to use helper functions that return a plain Func
2635 // to simply set the output(s) without needing a wrapper Func.
2637 this->check_gio_access();
2638 assign_from_func(f);
2639 return *this;
2640 }
2641
2642 operator OutputImageParam() const {
2643 this->check_gio_access();
2644 user_assert(!this->is_array()) << "Cannot convert an Output<Buffer<>[]> to an ImageParam; use an explicit subscript operator: " << this->name();
2645 internal_assert(this->exprs_.empty() && this->funcs_.size() == 1);
2646 return this->funcs_.at(0).output_buffer();
2647 }
2648
2649 // Forward set_estimates() to Func (rather than OutputImageParam) so that it can
2650 // handle Tuple-valued outputs correctly.
2652 user_assert(!this->is_array()) << "Cannot call set_estimates() on an array Output; use an explicit subscript operator: " << this->name();
2653 internal_assert(this->exprs_.empty() && this->funcs_.size() == 1);
2654 this->funcs_.at(0).set_estimates(estimates);
2655 return *this;
2656 }
2657
2659 const Func &operator[](size_t i) const {
2660 this->check_gio_access();
2661 return this->template get_values<Func>()[i];
2662 }
2663
2664 // Allow Output<Buffer[]>.compute_root() (or other scheduling directive that requires nonconst)
2667 this->check_gio_access();
2668 return this->template get_values<Func>()[i];
2669 }
2670
2671 /** Forward methods to the OutputImageParam. */
2672 // @{
2676 HALIDE_FORWARD_METHOD(OutputImageParam, set_host_alignment)
2686 // }@
2687};
2688
2689template<typename T>
2691private:
2693
2694 HALIDE_NO_USER_CODE_INLINE Func &get_assignable_func_ref(size_t i) {
2695 internal_assert(this->exprs_.empty() && this->funcs_.size() > i);
2696 return this->funcs_.at(i);
2697 }
2698
2699protected:
2700 using TBase = typename Super::TBase;
2701
2702 explicit GeneratorOutput_Func(const std::string &name)
2703 : Super(name, ArgInfoKind::Function, std::vector<Type>{}, -1) {
2704 }
2705
2706 GeneratorOutput_Func(const std::string &name, const std::vector<Type> &t, int d)
2707 : Super(name, ArgInfoKind::Function, t, d) {
2708 }
2709
2710 GeneratorOutput_Func(const std::string &name, const std::vector<Type> &t)
2711 : Super(name, ArgInfoKind::Function, t, -1) {
2712 }
2713
2714 GeneratorOutput_Func(const std::string &name, int d)
2715 : Super(name, ArgInfoKind::Function, {}, d) {
2716 }
2717
2718 GeneratorOutput_Func(size_t array_size, const std::string &name, const std::vector<Type> &t, int d)
2719 : Super(array_size, name, ArgInfoKind::Function, t, d) {
2720 }
2721
2722public:
2723 // Allow Output<Func> = Func
2726 this->check_gio_access();
2727 this->check_value_writable();
2728
2729 // Don't bother verifying the Func type, dimensions, etc., here:
2730 // That's done later, when we produce the pipeline.
2731 get_assignable_func_ref(0) = f;
2732 return *this;
2733 }
2734
2735 // Allow Output<Func[]> = Func
2737 Func &operator[](size_t i) {
2738 this->check_gio_access();
2739 this->check_value_writable();
2740 return get_assignable_func_ref(i);
2741 }
2742
2743 // Allow Func = Output<Func[]>
2745 const Func &operator[](size_t i) const {
2746 this->check_gio_access();
2747 return Super::operator[](i);
2748 }
2749
2750 GeneratorOutput_Func<T> &set_estimate(const Var &var, const Expr &min, const Expr &extent) {
2751 this->check_gio_access();
2752 internal_assert(this->exprs_.empty() && !this->funcs_.empty());
2753 for (Func &f : this->funcs_) {
2754 f.set_estimate(var, min, extent);
2755 }
2756 return *this;
2757 }
2758
2760 this->check_gio_access();
2761 internal_assert(this->exprs_.empty() && !this->funcs_.empty());
2762 for (Func &f : this->funcs_) {
2763 f.set_estimates(estimates);
2764 }
2765 return *this;
2766 }
2767};
2768
2769template<typename T>
2771private:
2773
2774protected:
2775 using TBase = typename Super::TBase;
2776
2777 explicit GeneratorOutput_Arithmetic(const std::string &name)
2779 }
2780
2781 GeneratorOutput_Arithmetic(size_t array_size, const std::string &name)
2783 }
2784};
2785
2788 typename select_type<
2792
2793} // namespace Internal
2794
2795template<typename T>
2797private:
2799
2800protected:
2801 using TBase = typename Super::TBase;
2802
2803public:
2804 // Mark all of these explicit (not just single-arg versions) so that
2805 // we disallow copy-list-initialization form (i.e., Output foo{"foo"} is ok,
2806 // but Output foo = {"foo"} is not).
2807 explicit GeneratorOutput(const std::string &name)
2808 : Super(name) {
2809 }
2810
2811 explicit GeneratorOutput(const char *name)
2812 : GeneratorOutput(std::string(name)) {
2813 }
2814
2815 explicit GeneratorOutput(size_t array_size, const std::string &name)
2816 : Super(array_size, name) {
2817 }
2818
2819 explicit GeneratorOutput(const std::string &name, int d)
2820 : Super(name, d) {
2821 }
2822
2823 explicit GeneratorOutput(const std::string &name, const Type &t)
2824 : Super(name, {t}) {
2825 }
2826
2827 explicit GeneratorOutput(const std::string &name, const std::vector<Type> &t)
2828 : Super(name, t) {
2829 }
2830
2831 explicit GeneratorOutput(const std::string &name, const Type &t, int d)
2832 : Super(name, {t}, d) {
2833 }
2834
2835 explicit GeneratorOutput(const std::string &name, const std::vector<Type> &t, int d)
2836 : Super(name, t, d) {
2837 }
2838
2839 explicit GeneratorOutput(size_t array_size, const std::string &name, int d)
2840 : Super(array_size, name, d) {
2841 }
2842
2843 explicit GeneratorOutput(size_t array_size, const std::string &name, const Type &t)
2844 : Super(array_size, name, {t}) {
2845 }
2846
2847 explicit GeneratorOutput(size_t array_size, const std::string &name, const std::vector<Type> &t)
2848 : Super(array_size, name, t) {
2849 }
2850
2851 explicit GeneratorOutput(size_t array_size, const std::string &name, const Type &t, int d)
2852 : Super(array_size, name, {t}, d) {
2853 }
2854
2855 explicit GeneratorOutput(size_t array_size, const std::string &name, const std::vector<Type> &t, int d)
2856 : Super(array_size, name, t, d) {
2857 }
2858
2859 // TODO: This used to take the buffer as a const ref. This no longer works as
2860 // using it in a Pipeline might change the dev field so it is currently
2861 // not considered const. We should consider how this really ought to work.
2862 template<typename T2, int D2>
2864 Super::operator=(buffer);
2865 return *this;
2866 }
2867
2868 template<typename T2>
2870 Super::operator=(stub_output_buffer);
2871 return *this;
2872 }
2873
2875 Super::operator=(f);
2876 return *this;
2877 }
2878};
2879
2880namespace Internal {
2881
2882template<typename T>
2883T parse_scalar(const std::string &value) {
2884 std::istringstream iss(value);
2885 T t;
2886 iss >> t;
2887 user_assert(!iss.fail() && iss.get() == EOF) << "Unable to parse: " << value;
2888 return t;
2889}
2890
2891std::vector<Type> parse_halide_type_list(const std::string &types);
2892
2894 Dim,
2895 ArraySize };
2896
2897// This is a type of GeneratorParam used internally to create 'synthetic' params
2898// (e.g. image.type, image.dim); it is not possible for user code to instantiate it.
2899template<typename T>
2901public:
2902 void set_from_string(const std::string &new_value_string) override {
2903 // If error_msg is not empty, this is unsettable:
2904 // display error_msg as a user error.
2905 if (!error_msg.empty()) {
2906 user_error << error_msg;
2907 }
2909 }
2910
2911 std::string get_default_value() const override {
2913 return std::string();
2914 }
2915
2916 std::string call_to_string(const std::string &v) const override {
2918 return std::string();
2919 }
2920
2921 std::string get_c_type() const override {
2923 return std::string();
2924 }
2925
2926 bool is_synthetic_param() const override {
2927 return true;
2928 }
2929
2930private:
2932
2933 static std::unique_ptr<Internal::GeneratorParamBase> make(
2934 GeneratorBase *generator,
2935 const std::string &generator_name,
2936 const std::string &gpname,
2937 GIOBase &gio,
2938 SyntheticParamType which,
2939 bool defined) {
2940 std::string error_msg = defined ? "Cannot set the GeneratorParam " + gpname + " for " + generator_name + " because the value is explicitly specified in the C++ source." : "";
2941 return std::unique_ptr<GeneratorParam_Synthetic<T>>(
2942 new GeneratorParam_Synthetic<T>(gpname, gio, which, error_msg));
2943 }
2944
2945 GeneratorParam_Synthetic(const std::string &name, GIOBase &gio, SyntheticParamType which, const std::string &error_msg = "")
2946 : GeneratorParamImpl<T>(name, T()), gio(gio), which(which), error_msg(error_msg) {
2947 }
2948
2950 void set_from_string_impl(const std::string &new_value_string) {
2953 }
2954
2956 void set_from_string_impl(const std::string &new_value_string) {
2957 if (which == SyntheticParamType::Dim) {
2959 } else if (which == SyntheticParamType::ArraySize) {
2961 } else {
2963 }
2964 }
2965
2966 GIOBase &gio;
2967 const SyntheticParamType which;
2968 const std::string error_msg;
2969};
2970
2971} // namespace Internal
2972
2973/** GeneratorContext is a class that is used when using Generators (or Stubs) directly;
2974 * it is used to allow the outer context (typically, either a Generator or "top-level" code)
2975 * to specify certain information to the inner context to ensure that inner and outer
2976 * Generators are compiled in a compatible way.
2977 *
2978 * If you are using this at "top level" (e.g. with the JIT), you can construct a GeneratorContext
2979 * with a Target:
2980 * \code
2981 * auto my_stub = MyStub(
2982 * GeneratorContext(get_target_from_environment()),
2983 * // inputs
2984 * { ... },
2985 * // generator params
2986 * { ... }
2987 * );
2988 * \endcode
2989 *
2990 * Note that all Generators embed a GeneratorContext, so if you are using a Stub
2991 * from within a Generator, you can just pass 'context()' for the GeneratorContext:
2992 * \code
2993 * struct SomeGen : Generator<SomeGen> {
2994 * void generate() {
2995 * ...
2996 * auto my_stub = MyStub(
2997 * context(), // GeneratorContext
2998 * // inputs
2999 * { ... },
3000 * // generator params
3001 * { ... }
3002 * );
3003 * ...
3004 * }
3005 * };
3006 * \endcode
3007 */
3009public:
3011
3012 explicit GeneratorContext(const Target &t);
3013 explicit GeneratorContext(const Target &t,
3015
3016 GeneratorContext() = default;
3021
3022 const Target &target() const {
3023 return target_;
3024 }
3026 return autoscheduler_params_;
3027 }
3028
3029 // Return a copy of this GeneratorContext that uses the given Target.
3030 // This method is rarely needed; it's really provided as a convenience
3031 // for use with init_from_context().
3033
3034 template<typename T>
3035 inline std::unique_ptr<T> create() const {
3036 return T::create(*this);
3037 }
3038 template<typename T, typename... Args>
3039 inline std::unique_ptr<T> apply(const Args &...args) const {
3040 auto t = this->create<T>();
3041 t->apply(args...);
3042 return t;
3043 }
3044
3045private:
3046 Target target_;
3047 AutoschedulerParams autoscheduler_params_;
3048};
3049
3051 // Names in this class are only intended for use in derived classes.
3052protected:
3053 // Import a consistent list of Halide names that can be used in
3054 // Halide generators without qualification.
3074 template<typename T>
3075 static Expr cast(Expr e) {
3076 return Halide::cast<T>(e);
3077 }
3078 static inline Expr cast(Halide::Type t, Expr e) {
3079 return Halide::cast(t, std::move(e));
3080 }
3081 template<typename T>
3083 template<typename T = void, int D = -1>
3085 template<typename T>
3087 static inline Type Bool(int lanes = 1) {
3088 return Halide::Bool(lanes);
3089 }
3090 static inline Type Float(int bits, int lanes = 1) {
3091 return Halide::Float(bits, lanes);
3092 }
3093 static inline Type Int(int bits, int lanes = 1) {
3094 return Halide::Int(bits, lanes);
3095 }
3096 static inline Type UInt(int bits, int lanes = 1) {
3097 return Halide::UInt(bits, lanes);
3098 }
3099};
3100
3101namespace Internal {
3102
3103template<typename... Args>
3104struct NoRealizations : std::false_type {};
3105
3106template<>
3107struct NoRealizations<> : std::true_type {};
3108
3109template<typename T, typename... Args>
3110struct NoRealizations<T, Args...> {
3111 static const bool value = !std::is_convertible<T, Realization>::value && NoRealizations<Args...>::value;
3112};
3113
3114// Note that these functions must never return null:
3115// if they cannot return a valid Generator, they must assert-fail.
3116using GeneratorFactory = std::function<AbstractGeneratorPtr(const GeneratorContext &context)>;
3117
3119 // names used across all params, inputs, and outputs.
3120 std::set<std::string> names;
3121
3122 // Ordered-list of non-null ptrs to GeneratorParam<> fields.
3123 std::vector<Internal::GeneratorParamBase *> filter_generator_params;
3124
3125 // Ordered-list of non-null ptrs to Input<> fields.
3126 std::vector<Internal::GeneratorInputBase *> filter_inputs;
3127
3128 // Ordered-list of non-null ptrs to Output<> fields; empty if old-style Generator.
3129 std::vector<Internal::GeneratorOutputBase *> filter_outputs;
3130
3131 // list of synthetic GP's that we dynamically created; this list only exists to simplify
3132 // lifetime management, and shouldn't be accessed directly outside of our ctor/dtor,
3133 // regardless of friend access.
3134 std::vector<std::unique_ptr<Internal::GeneratorParamBase>> owned_synthetic_params;
3135
3136 // list of dynamically-added inputs and outputs, here only for lifetime management.
3137 std::vector<std::unique_ptr<Internal::GIOBase>> owned_extras;
3138
3139public:
3140 friend class GeneratorBase;
3141
3142 GeneratorParamInfo(GeneratorBase *generator, size_t size);
3143
3144 const std::vector<Internal::GeneratorParamBase *> &generator_params() const {
3145 return filter_generator_params;
3146 }
3147 const std::vector<Internal::GeneratorInputBase *> &inputs() const {
3148 return filter_inputs;
3149 }
3150 const std::vector<Internal::GeneratorOutputBase *> &outputs() const {
3151 return filter_outputs;
3152 }
3153};
3154
3156public:
3157 ~GeneratorBase() override;
3158
3159 /** Given a data type, return an estimate of the "natural" vector size
3160 * for that data type when compiling for the current target. */
3162 return get_target().natural_vector_size(t);
3163 }
3164
3165 /** Given a data type, return an estimate of the "natural" vector size
3166 * for that data type when compiling for the current target. */
3167 template<typename data_t>
3170 }
3171
3172 /**
3173 * set_inputs is a variadic wrapper around set_inputs_vector, which makes usage much simpler
3174 * in many cases, as it constructs the relevant entries for the vector for you, which
3175 * is often a bit unintuitive at present. The arguments are passed in Input<>-declaration-order,
3176 * and the types must be compatible. Array inputs are passed as std::vector<> of the relevant type.
3177 *
3178 * Note: at present, scalar input types must match *exactly*, i.e., for Input<uint8_t>, you
3179 * must pass an argument that is actually uint8_t; an argument that is int-that-will-fit-in-uint8
3180 * will assert-fail at Halide compile time.
3181 */
3182 template<typename... Args>
3183 void set_inputs(const Args &...args) {
3184 // set_inputs_vector() checks this too, but checking it here allows build_inputs() to avoid out-of-range checks.
3185 GeneratorParamInfo &pi = this->param_info();
3186 user_assert(sizeof...(args) == pi.inputs().size())
3187 << "Expected exactly " << pi.inputs().size()
3188 << " inputs but got " << sizeof...(args) << "\n";
3189 set_inputs_vector(build_inputs(std::forward_as_tuple<const Args &...>(args...), std::make_index_sequence<sizeof...(Args)>{}));
3190 }
3191
3192 Realization realize(std::vector<int32_t> sizes) {
3193 this->check_scheduled("realize");
3194 return get_pipeline().realize(std::move(sizes), get_target());
3195 }
3196
3197 // Only enable if none of the args are Realization; otherwise we can incorrectly
3198 // select this method instead of the Realization-as-outparam variant
3199 template<typename... Args, typename std::enable_if<NoRealizations<Args...>::value>::type * = nullptr>
3201 this->check_scheduled("realize");
3202 return get_pipeline().realize(std::forward<Args>(args)..., get_target());
3203 }
3204
3206 this->check_scheduled("realize");
3208 }
3209
3210 // Return the Pipeline that has been built by the generate() method.
3211 // This method can only be called from the schedule() method.
3212 // (This may be relaxed in the future to allow calling from generate() as
3213 // long as all Outputs have been defined.)
3215
3216 // Create Input<Func> with dynamic type & dimensions
3217 template<typename T,
3218 typename std::enable_if<std::is_same<T, Halide::Func>::value>::type * = nullptr>
3219 GeneratorInput<T> *add_input(const std::string &name, const Type &t, int dimensions) {
3221 auto *p = new GeneratorInput<T>(name, t, dimensions);
3222 p->generator = this;
3223 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3224 param_info_ptr->filter_inputs.push_back(p);
3225 return p;
3226 }
3227
3228 // Create Input<Buffer> with dynamic type & dimensions
3229 template<typename T,
3230 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3231 GeneratorInput<T> *add_input(const std::string &name, const Type &t, int dimensions) {
3232 static_assert(!T::has_static_halide_type, "You can only call this version of add_input() for a Buffer<T, D> where T is void or omitted .");
3233 static_assert(!T::has_static_dimensions, "You can only call this version of add_input() for a Buffer<T, D> where D is -1 or omitted.");
3235 auto *p = new GeneratorInput<T>(name, t, dimensions);
3236 p->generator = this;
3237 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3238 param_info_ptr->filter_inputs.push_back(p);
3239 return p;
3240 }
3241
3242 // Create Input<Buffer> with compile-time type
3243 template<typename T,
3244 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3245 GeneratorInput<T> *add_input(const std::string &name, int dimensions) {
3246 static_assert(T::has_static_halide_type, "You can only call this version of add_input() for a Buffer<T, D> where T is not void.");
3247 static_assert(!T::has_static_dimensions, "You can only call this version of add_input() for a Buffer<T, D> where D is -1 or omitted.");
3249 auto *p = new GeneratorInput<T>(name, dimensions);
3250 p->generator = this;
3251 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3252 param_info_ptr->filter_inputs.push_back(p);
3253 return p;
3254 }
3255
3256 // Create Input<Buffer> with compile-time type & dimensions
3257 template<typename T,
3258 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3259 GeneratorInput<T> *add_input(const std::string &name) {
3260 static_assert(T::has_static_halide_type, "You can only call this version of add_input() for a Buffer<T, D> where T is not void.");
3261 static_assert(T::has_static_dimensions, "You can only call this version of add_input() for a Buffer<T, D> where D is not -1.");
3263 auto *p = new GeneratorInput<T>(name);
3264 p->generator = this;
3265 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3266 param_info_ptr->filter_inputs.push_back(p);
3267 return p;
3268 }
3269 // Create Input<scalar>
3270 template<typename T,
3271 typename std::enable_if<std::is_arithmetic<T>::value>::type * = nullptr>
3272 GeneratorInput<T> *add_input(const std::string &name) {
3274 auto *p = new GeneratorInput<T>(name);
3275 p->generator = this;
3276 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3277 param_info_ptr->filter_inputs.push_back(p);
3278 return p;
3279 }
3280 // Create Input<Expr> with dynamic type
3281 template<typename T,
3282 typename std::enable_if<std::is_same<T, Expr>::value>::type * = nullptr>
3283 GeneratorInput<T> *add_input(const std::string &name, const Type &type) {
3285 auto *p = new GeneratorInput<Expr>(name);
3286 p->generator = this;
3287 p->set_type(type);
3288 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3289 param_info_ptr->filter_inputs.push_back(p);
3290 return p;
3291 }
3292
3293 // Create Output<Func> with dynamic type & dimensions
3294 template<typename T,
3295 typename std::enable_if<std::is_same<T, Halide::Func>::value>::type * = nullptr>
3296 GeneratorOutput<T> *add_output(const std::string &name, const Type &t, int dimensions) {
3298 auto *p = new GeneratorOutput<T>(name, t, dimensions);
3299 p->generator = this;
3300 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3301 param_info_ptr->filter_outputs.push_back(p);
3302 return p;
3303 }
3304
3305 // Create Output<Buffer> with dynamic type & dimensions
3306 template<typename T,
3307 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3308 GeneratorOutput<T> *add_output(const std::string &name, const Type &t, int dimensions) {
3309 static_assert(!T::has_static_halide_type, "You can only call this version of add_output() for a Buffer<T, D> where T is void or omitted .");
3310 static_assert(!T::has_static_dimensions, "You can only call this version of add_output() for a Buffer<T, D> where D is -1 or omitted.");
3312 auto *p = new GeneratorOutput<T>(name, t, dimensions);
3313 p->generator = this;
3314 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3315 param_info_ptr->filter_outputs.push_back(p);
3316 return p;
3317 }
3318
3319 // Create Output<Buffer> with compile-time type
3320 template<typename T,
3321 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3322 GeneratorOutput<T> *add_output(const std::string &name, int dimensions) {
3323 static_assert(T::has_static_halide_type, "You can only call this version of add_output() for a Buffer<T, D> where T is not void.");
3324 static_assert(!T::has_static_dimensions, "You can only call this version of add_output() for a Buffer<T, D> where D is -1 or omitted.");
3326 auto *p = new GeneratorOutput<T>(name, dimensions);
3327 p->generator = this;
3328 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3329 param_info_ptr->filter_outputs.push_back(p);
3330 return p;
3331 }
3332
3333 // Create Output<Buffer> with compile-time type & dimensions
3334 template<typename T,
3335 typename std::enable_if<!std::is_arithmetic<T>::value && !std::is_same<T, Halide::Func>::value>::type * = nullptr>
3336 GeneratorOutput<T> *add_output(const std::string &name) {
3337 static_assert(T::has_static_halide_type, "You can only call this version of add_output() for a Buffer<T, D> where T is not void.");
3338 static_assert(T::has_static_dimensions, "You can only call this version of add_output() for a Buffer<T, D> where D is not -1.");
3340 auto *p = new GeneratorOutput<T>(name);
3341 p->generator = this;
3342 param_info_ptr->owned_extras.push_back(std::unique_ptr<Internal::GIOBase>(p));
3343 param_info_ptr->filter_outputs.push_back(p);
3344 return p;
3345 }
3346
3347 void add_requirement(const Expr &condition, const std::vector<Expr> &error_args);
3348
3349 template<typename... Args,
3350 typename = typename std::enable_if<Internal::all_are_printable_args<Args...>::value>::type>
3351 inline HALIDE_NO_USER_CODE_INLINE void add_requirement(const Expr &condition, Args &&...error_args) {
3352 std::vector<Expr> collected_args;
3353 Internal::collect_print_args(collected_args, std::forward<Args>(error_args)...);
3354 add_requirement(condition, collected_args);
3355 }
3356
3359 }
3360
3361protected:
3362 GeneratorBase(size_t size, const void *introspection_helper);
3363 void set_generator_names(const std::string &registered_name, const std::string &stub_name);
3364
3365 // Note that it is explicitly legal to override init_from_context(), so that you can (say)
3366 // create a modified context with a different Target (eg with features enabled or disabled), but...
3367 //
3368 // *** WARNING ***
3369 //
3370 // Modifying the context here can be fraught with subtle hazards, especially when used
3371 // in conjunction with compiling to multitarget output. Adding or removing Feature
3372 // flags could break your build (if you are lucky), or cause subtle runtime failures (if unlucky)...
3373 //
3374 // e.g. in the latter case, say you decided to enable AVX512_SapphireRapids as an experiment,
3375 // and override init_from_context() to do just that. You'd end up being crashy on pre-AVX512
3376 // hardware, because the code that Halide injects to do runtime CPU feature detection at runtime
3377 // doesn't know it needs to do the runtime detection for this flag.
3378 //
3379 // Even if you are using multitarget output, using this as a 'hook' to enable or disable Features
3380 // can produce hard-to-maintain code in the long term: Halide has dozens of feature flags now,
3381 // many of which are orthogonal to each other and/or specific to a certain architecture
3382 // (or sub-architecture). The interaction between 'orthogonal' flags like this is essentially
3383 // Undefined Behavior (e.g. if I enable the SSE41 Feature on a Target where arch = RISCV, what happens?
3384 // Is it ignored? Does it fail to compile? Something else?). The point here is that adding Features
3385 // here may end up eventually getting added to a Target you didn't anticipate and have adverse consequences.
3386 //
3387 // With all that in mind, here are some guidelines we think will make long-term code maintenance
3388 // less painful for you:
3389 //
3390 // - Override this method *only* for temporary debugging purposes; e.g. if you
3391 // need to add the `profile` feature to a specific Generator, but your build system doesn't easily
3392 // let you specify per-Generator target features, this is the right tool for the job.
3393 //
3394 // - If your build system makes it infeasible to customize the build Target in a reasonable way,
3395 // it may be appropriate to permanently override this method to enable specific Features for
3396 // specific Generators (e.g., enabling `strict_float` is a likely example). In that case,
3397 // we would suggest:
3398 //
3399 // - *NEVER* change the arch/bits/os of the Target.
3400 // - Only add Features; don't remove Features.
3401 // - For Features that are architecture-specific, always check the arch/bits/os
3402 // of the Target to be sure it's what you expect... e.g. if you are enabling
3403 // AVX512, only do so if compiling for an x86-64 Target. Even if your code
3404 // doesn't target any other architecture at the present time, Future You will be
3405 // happier.
3406 // - If you mutate a target conditionally based on the incoming target, try to do so
3407 // so based only on the Target's arch/bits/os, and not at the Features set on the target.
3408 // If examining Features is unavoidable (e.g. enable $FOO only if $BAR is enabled),
3409 // do so as conservatively as possible, and always validate that the rest of the Target
3410 // is sensible for what you are doing.
3411 //
3412 // Furthermore, if you override this, please don't try to directly set the `target` (etc) GeneratorParams
3413 // directly; instead, construct the new GeneratorContext you want and call the superclass
3414 // implementation of init_from_context.
3415 //
3416 // TL;DR: overrides to this method should probably never be checked in to your source control system
3417 // (rather, the override should be temporary and local, for experimentation). If you must check in
3418 // overrides to this method, be paranoid that the Target you get could be something you don't expect.
3419 //
3421
3422 virtual void call_configure() = 0;
3423 virtual void call_generate() = 0;
3424 virtual void call_schedule() = 0;
3425
3434
3435 template<typename T>
3437
3438 template<typename T>
3440
3441 // A Generator's creation and usage must go in a certain phase to ensure correctness;
3442 // the state machine here is advanced and checked at various points to ensure
3443 // this is the case.
3444 enum Phase {
3445 // Generator has just come into being.
3447
3448 // Generator has had its configure() method called. (For Generators without
3449 // a configure() method, this phase will be skipped and will advance
3450 // directly to InputsSet.)
3452
3453 // All Input<>/Param<> fields have been set. (Applicable only in JIT mode;
3454 // in AOT mode, this can be skipped, going Created->GenerateCalled directly.)
3456
3457 // Generator has had its generate() method called.
3459
3460 // Generator has had its schedule() method (if any) called.
3463
3467
3469
3471 return target;
3472 }
3473 bool using_autoscheduler() const {
3474 return !autoscheduler_.value().name.empty();
3475 }
3476
3477 // These must remain here for legacy code that access the fields directly.
3480
3481private:
3482 friend void ::Halide::Internal::generator_test();
3484 friend class GIOBase;
3489
3490 const size_t size;
3491
3492 // Lazily-allocated-and-inited struct with info about our various Params.
3493 // Do not access directly: use the param_info() getter.
3494 std::unique_ptr<GeneratorParamInfo> param_info_ptr;
3495
3496 std::string generator_registered_name, generator_stub_name;
3497 Pipeline pipeline;
3498
3499 struct Requirement {
3500 Expr condition;
3501 std::vector<Expr> error_args;
3502 };
3503 std::vector<Requirement> requirements;
3504
3505 // Return our GeneratorParamInfo.
3506 GeneratorParamInfo &param_info();
3507
3508 template<typename T>
3509 T *find_by_name(const std::string &name, const std::vector<T *> &v) {
3510 for (T *t : v) {
3511 if (t->name() == name) {
3512 return t;
3513 }
3514 }
3515 return nullptr;
3516 }
3517
3518 Internal::GeneratorInputBase *find_input_by_name(const std::string &name);
3519 Internal::GeneratorOutputBase *find_output_by_name(const std::string &name);
3520
3521 void check_scheduled(const char *m) const;
3522
3523 void build_params(bool force = false);
3524
3525 // Provide private, unimplemented, wrong-result-type methods here
3526 // so that Generators don't attempt to call the global methods
3527 // of the same name by accident: use the get_target() method instead.
3528 void get_host_target();
3529 void get_jit_target_from_environment();
3530 void get_target_from_environment();
3531
3532 void set_inputs_vector(const std::vector<std::vector<StubInput>> &inputs);
3533
3534 static void check_input_is_singular(Internal::GeneratorInputBase *in);
3535 static void check_input_is_array(Internal::GeneratorInputBase *in);
3536 static void check_input_kind(Internal::GeneratorInputBase *in, Internal::ArgInfoKind kind);
3537
3538 // Allow Buffer<> if:
3539 // -- we are assigning it to an Input<Buffer<>> (with compatible type and dimensions),
3540 // causing the Input<Buffer<>> to become a precompiled buffer in the generated code.
3541 // -- we are assigningit to an Input<Func>, in which case we just Func-wrap the Buffer<>.
3542 template<typename T, int Dims>
3543 std::vector<StubInput> build_input(size_t i, const Buffer<T, Dims> &arg) {
3544 auto *in = param_info().inputs().at(i);
3545 check_input_is_singular(in);
3546 const auto k = in->kind();
3548 Halide::Buffer<> b = arg;
3550 StubInput si(sib);
3551 return {si};
3552 } else if (k == Internal::ArgInfoKind::Function) {
3553 Halide::Func f(arg.name() + "_im");
3554 f(Halide::_) = arg(Halide::_);
3555 StubInput si(f);
3556 return {si};
3557 } else {
3558 check_input_kind(in, Internal::ArgInfoKind::Buffer); // just to trigger assertion
3559 return {};
3560 }
3561 }
3562
3563 // Allow Input<Buffer<>> if:
3564 // -- we are assigning it to another Input<Buffer<>> (with compatible type and dimensions),
3565 // allowing us to simply pipe a parameter from an enclosing Generator to the Invoker.
3566 // -- we are assigningit to an Input<Func>, in which case we just Func-wrap the Input<Buffer<>>.
3567 template<typename T, int Dims>
3568 std::vector<StubInput> build_input(size_t i, const GeneratorInput<Buffer<T, Dims>> &arg) {
3569 auto *in = param_info().inputs().at(i);
3570 check_input_is_singular(in);
3571 const auto k = in->kind();
3573 StubInputBuffer<> sib = arg;
3574 StubInput si(sib);
3575 return {si};
3576 } else if (k == Internal::ArgInfoKind::Function) {
3577 Halide::Func f = arg.funcs().at(0);
3578 StubInput si(f);
3579 return {si};
3580 } else {
3581 check_input_kind(in, Internal::ArgInfoKind::Buffer); // just to trigger assertion
3582 return {};
3583 }
3584 }
3585
3586 // Allow Func iff we are assigning it to an Input<Func> (with compatible type and dimensions).
3587 std::vector<StubInput> build_input(size_t i, const Func &arg) {
3588 auto *in = param_info().inputs().at(i);
3589 check_input_kind(in, Internal::ArgInfoKind::Function);
3590 check_input_is_singular(in);
3591 const Halide::Func &f = arg;
3592 StubInput si(f);
3593 return {si};
3594 }
3595
3596 // Allow vector<Func> iff we are assigning it to an Input<Func[]> (with compatible type and dimensions).
3597 std::vector<StubInput> build_input(size_t i, const std::vector<Func> &arg) {
3598 auto *in = param_info().inputs().at(i);
3599 check_input_kind(in, Internal::ArgInfoKind::Function);
3600 check_input_is_array(in);
3601 // My kingdom for a list comprehension...
3602 std::vector<StubInput> siv;
3603 siv.reserve(arg.size());
3604 for (const auto &f : arg) {
3605 siv.emplace_back(f);
3606 }
3607 return siv;
3608 }
3609
3610 // Expr must be Input<Scalar>.
3611 std::vector<StubInput> build_input(size_t i, const Expr &arg) {
3612 auto *in = param_info().inputs().at(i);
3613 check_input_kind(in, Internal::ArgInfoKind::Scalar);
3614 check_input_is_singular(in);
3615 StubInput si(arg);
3616 return {si};
3617 }
3618
3619 // (Array form)
3620 std::vector<StubInput> build_input(size_t i, const std::vector<Expr> &arg) {
3621 auto *in = param_info().inputs().at(i);
3622 check_input_kind(in, Internal::ArgInfoKind::Scalar);
3623 check_input_is_array(in);
3624 std::vector<StubInput> siv;
3625 siv.reserve(arg.size());
3626 for (const auto &value : arg) {
3627 siv.emplace_back(value);
3628 }
3629 return siv;
3630 }
3631
3632 // Any other type must be convertible to Expr and must be associated with an Input<Scalar>.
3633 // Use is_arithmetic since some Expr conversions are explicit.
3634 template<typename T,
3635 typename std::enable_if<std::is_arithmetic<T>::value>::type * = nullptr>
3636 std::vector<StubInput> build_input(size_t i, const T &arg) {
3637 auto *in = param_info().inputs().at(i);
3638 check_input_kind(in, Internal::ArgInfoKind::Scalar);
3639 check_input_is_singular(in);
3640 // We must use an explicit Expr() ctor to preserve the type
3641 Expr e(arg);
3642 StubInput si(e);
3643 return {si};
3644 }
3645
3646 // (Array form)
3647 template<typename T,
3648 typename std::enable_if<std::is_arithmetic<T>::value>::type * = nullptr>
3649 std::vector<StubInput> build_input(size_t i, const std::vector<T> &arg) {
3650 auto *in = param_info().inputs().at(i);
3651 check_input_kind(in, Internal::ArgInfoKind::Scalar);
3652 check_input_is_array(in);
3653 std::vector<StubInput> siv;
3654 siv.reserve(arg.size());
3655 for (const auto &value : arg) {
3656 // We must use an explicit Expr() ctor to preserve the type;
3657 // otherwise, implicit conversions can downgrade (e.g.) float -> int
3658 Expr e(value);
3659 siv.emplace_back(e);
3660 }
3661 return siv;
3662 }
3663
3664 template<typename... Args, size_t... Indices>
3665 std::vector<std::vector<StubInput>> build_inputs(const std::tuple<const Args &...> &t, std::index_sequence<Indices...>) {
3666 return {build_input(Indices, std::get<Indices>(t))...};
3667 }
3668
3669 // Note that this deliberately ignores inputs/outputs with multiple array values
3670 // (ie, one name per input or output, regardless of array_size())
3671 template<typename T>
3672 static void get_arguments(std::vector<AbstractGenerator::ArgInfo> &args, ArgInfoDirection dir, const T &t) {
3673 for (auto *e : t) {
3674 args.push_back({e->name(),
3675 dir,
3676 e->kind(),
3677 e->gio_types_defined() ? e->gio_types() : std::vector<Type>{},
3678 e->dims_defined() ? e->dims() : 0});
3679 }
3680 }
3681
3682public:
3683 // AbstractGenerator methods
3684 std::string name() override;
3685 GeneratorContext context() const override;
3686 std::vector<ArgInfo> arginfos() override;
3688
3689 void set_generatorparam_value(const std::string &name, const std::string &value) override;
3690 void set_generatorparam_value(const std::string &name, const LoopLevel &loop_level) override;
3691
3692 std::vector<Parameter> input_parameter(const std::string &name) override;
3693 std::vector<Func> output_func(const std::string &name) override;
3694
3695 // This is overridden in the concrete Generator<> subclass.
3696 // Pipeline build_pipeline() override;
3697
3698 void bind_input(const std::string &name, const std::vector<Parameter> &v) override;
3699 void bind_input(const std::string &name, const std::vector<Func> &v) override;
3700 void bind_input(const std::string &name, const std::vector<Expr> &v) override;
3701
3702 bool emit_cpp_stub(const std::string &stub_file_path) override;
3703 bool emit_hlpipe(const std::string &hlpipe_file_path) override;
3704
3705 GeneratorBase(const GeneratorBase &) = delete;
3709};
3710
3712public:
3713 static void register_factory(const std::string &name, GeneratorFactory generator_factory);
3714 static void unregister_factory(const std::string &name);
3715 static std::vector<std::string> enumerate();
3716 // This method returns nullptr if it cannot return a valid Generator;
3717 // the caller is responsible for checking the result.
3718 static AbstractGeneratorPtr create(const std::string &name,
3719 const Halide::GeneratorContext &context);
3720
3721private:
3722 using GeneratorFactoryMap = std::map<const std::string, GeneratorFactory>;
3723
3724 GeneratorFactoryMap factories;
3725 std::mutex mutex;
3726
3727 static GeneratorRegistry &get_registry();
3728
3729 GeneratorRegistry() = default;
3730
3731public:
3736};
3737
3738} // namespace Internal
3739
3740template<class T>
3742protected:
3745 Internal::Introspection::get_introspection_helper<T>()) {
3746 }
3747
3748public:
3749 static std::unique_ptr<T> create(const Halide::GeneratorContext &context) {
3750 // We must have an object of type T (not merely GeneratorBase) to call a protected method,
3751 // because CRTP is a weird beast.
3752 auto g = std::make_unique<T>();
3753 g->init_from_context(context);
3754 return g;
3755 }
3756
3757 // This is public but intended only for use by the HALIDE_REGISTER_GENERATOR() macro.
3758 static std::unique_ptr<T> create(const Halide::GeneratorContext &context,
3759 const std::string &registered_name,
3760 const std::string &stub_name) {
3761 auto g = create(context);
3762 g->set_generator_names(registered_name, stub_name);
3763 return g;
3764 }
3765
3766 template<typename... Args>
3767 void apply(const Args &...args) {
3769 set_inputs(args...);
3770 call_generate();
3771 call_schedule();
3772 }
3773
3774 template<typename T2>
3775 std::unique_ptr<T2> create() const {
3776 return T2::create(context());
3777 }
3778
3779 template<typename T2, typename... Args>
3780 inline std::unique_ptr<T2> apply(const Args &...args) const {
3781 auto t = this->create<T2>();
3782 t->apply(args...);
3783 return t;
3784 }
3785
3786private:
3787 // std::is_member_function_pointer will fail if there is no member of that name,
3788 // so we use a little SFINAE to detect if there are method-shaped members.
3789 template<typename>
3790 struct type_sink {
3791 typedef void type;
3792 };
3793
3794 template<typename T2, typename = void>
3795 struct has_configure_method : std::false_type {};
3796
3797 template<typename T2>
3798 struct has_configure_method<T2, typename type_sink<decltype(std::declval<T2>().configure())>::type> : std::true_type {};
3799
3800 template<typename T2, typename = void>
3801 struct has_generate_method : std::false_type {};
3802
3803 template<typename T2>
3804 struct has_generate_method<T2, typename type_sink<decltype(std::declval<T2>().generate())>::type> : std::true_type {};
3805
3806 template<typename T2, typename = void>
3807 struct has_schedule_method : std::false_type {};
3808
3809 template<typename T2>
3810 struct has_schedule_method<T2, typename type_sink<decltype(std::declval<T2>().schedule())>::type> : std::true_type {};
3811
3812 Pipeline build_pipeline_impl() {
3813 T *t = (T *)this;
3814 // No: configure() must be called prior to this
3815 // (and in fact, prior to calling set_inputs).
3816 //
3817 // t->call_configure_impl();
3818
3819 t->call_generate_impl();
3820 t->call_schedule_impl();
3821 return get_pipeline();
3822 }
3823
3824 void call_configure_impl() {
3825 pre_configure();
3826 if constexpr (has_configure_method<T>::value) {
3827 T *t = (T *)this;
3828 static_assert(std::is_void<decltype(t->configure())>::value, "configure() must return void");
3829 t->configure();
3830 }
3832 }
3833
3834 void call_generate_impl() {
3835 pre_generate();
3836 static_assert(has_generate_method<T>::value, "Expected a generate() method here.");
3837 T *t = (T *)this;
3838 static_assert(std::is_void<decltype(t->generate())>::value, "generate() must return void");
3839 t->generate();
3840 post_generate();
3841 }
3842
3843 void call_schedule_impl() {
3844 pre_schedule();
3845 if constexpr (has_schedule_method<T>::value) {
3846 T *t = (T *)this;
3847 static_assert(std::is_void<decltype(t->schedule())>::value, "schedule() must return void");
3848 t->schedule();
3849 }
3850 post_schedule();
3851 }
3852
3853protected:
3856 return this->build_pipeline_impl();
3857 }
3858
3859 void call_configure() override {
3860 this->call_configure_impl();
3861 }
3862
3863 void call_generate() override {
3864 this->call_generate_impl();
3865 }
3866
3867 void call_schedule() override {
3868 this->call_schedule_impl();
3869 }
3870
3871private:
3872 friend void ::Halide::Internal::generator_test();
3873 friend void ::Halide::Internal::generator_test();
3874 friend class ::Halide::GeneratorContext;
3875
3876public:
3877 Generator(const Generator &) = delete;
3878 Generator &operator=(const Generator &) = delete;
3881};
3882
3883namespace Internal {
3884
3889
3890// -----------------------------
3891
3892/** ExecuteGeneratorArgs is the set of arguments to execute_generator().
3893 */
3895 // Output directory for all files generated. Must not be empty.
3896 std::string output_dir;
3897
3898 // Type(s) of outputs to produce. Must not be empty.
3899 std::set<OutputFileType> output_types;
3900
3901 // Target(s) to use when generating. Must not be empty.
3902 // If list contains multiple entries, a multitarget output will be produced.
3903 std::vector<Target> targets;
3904
3905 // When generating multitarget output, use these as the suffixes for each Target
3906 // specified by the targets field. If empty, the canonical string form of
3907 // each Target will be used. If nonempty, it must be the same length as the
3908 // targets vector.
3909 std::vector<std::string> suffixes;
3910
3911 // Name of the generator to execute (or empty if none, e.g. if generating a runtime)
3912 // Must be one recognized by the specified GeneratorFactoryProvider.
3913 std::string generator_name;
3914
3915 // Name to use for the generated function. May include C++ namespaces,
3916 // e.g. "HalideTest::AnotherNamespace::cxx_mangling". If empty, use `generator_name`.
3917 std::string function_name;
3918
3919 // Base filename for all outputs (differentated by file extension).
3920 // If empty, use `function_name` (ignoring any C++ namespaces).
3921 std::string file_base_name;
3922
3923 // The name of a standalone runtime to generate. Only honors EMIT_OPTIONS 'o'
3924 // and 'static_library'. When multiple targets are specified, it picks a
3925 // runtime that is compatible with all of the targets, or fails if it cannot
3926 // find one. Flags across all of the targets that do not affect runtime code
3927 // generation, such as `no_asserts` and `no_runtime`, are ignored.
3928 std::string runtime_name;
3929
3930 // The mode in which to build the Generator.
3932 // Build it as written.
3934
3935 // Build a version suitable for using for gradient descent calculation.
3938
3939 // The fn that will produce Generator(s) from the name specified.
3940 // (Note that `generator_name` is the only value that will ever be passed
3941 // for name here; it is provided for ease of interoperation with existing code.)
3942 //
3943 // If null, the default global registry of Generators will be used.
3944 using CreateGeneratorFn = std::function<AbstractGeneratorPtr(const std::string &name, const GeneratorContext &context)>;
3946
3947 // Values to substitute for GeneratorParams in the selected Generator.
3948 // Should not contain `target`.
3949 //
3950 // If any of the generator param names specified in this map are unknown
3951 // to the Generator created, an error will occur.
3953
3954 // Compiler Logger to use, for diagnostic work. If null, don't do any logging.
3956
3957 // If true, log the path of all output files to stdout.
3958 bool log_outputs = false;
3959};
3960
3961/**
3962 * Execute a Generator for AOT compilation -- this provides the implementation of
3963 * the command-line Generator interface `generate_filter_main()`, but with a structured
3964 * API that is more suitable for calling directly from code (vs command line).
3965 */
3967
3968// -----------------------------
3969
3970} // namespace Internal
3971
3972/** Create a Generator from the currently-registered Generators, use it to create a Callable.
3973 * Any GeneratorParams specified will be applied to the Generator before compilation.
3974 * If the name isn't registered, assert-fail. */
3975// @{
3977 const std::string &name,
3978 const GeneratorParamsMap &generator_params = {});
3980 const std::string &name,
3981 const GeneratorParamsMap &generator_params = {});
3982// @}
3983
3984} // namespace Halide
3985
3986// Define this namespace at global scope so that anonymous namespaces won't
3987// defeat our static_assert check; define a dummy type inside so we can
3988// check for type aliasing injected by anonymous namespace usage
3990struct halide_global_ns;
3991};
3992
3993#define _HALIDE_REGISTER_GENERATOR_IMPL(GEN_CLASS_NAME, GEN_REGISTRY_NAME, FULLY_QUALIFIED_STUB_NAME) \
3994 namespace halide_register_generator { \
3995 struct halide_global_ns; \
3996 namespace GEN_REGISTRY_NAME##_ns { \
3997 std::unique_ptr<Halide::Internal::AbstractGenerator> factory(const Halide::GeneratorContext &context); \
3998 std::unique_ptr<Halide::Internal::AbstractGenerator> factory(const Halide::GeneratorContext &context) { \
3999 using GenType = std::remove_pointer<decltype(new GEN_CLASS_NAME)>::type; /* NOLINT(bugprone-macro-parentheses) */ \
4000 return GenType::create(context, #GEN_REGISTRY_NAME, #FULLY_QUALIFIED_STUB_NAME); \
4001 } \
4002 } \
4003 namespace { \
4004 auto reg_##GEN_REGISTRY_NAME = Halide::Internal::RegisterGenerator(#GEN_REGISTRY_NAME, GEN_REGISTRY_NAME##_ns::factory); \
4005 } \
4006 } \
4007 static_assert(std::is_same<::halide_register_generator::halide_global_ns, halide_register_generator::halide_global_ns>::value, \
4008 "HALIDE_REGISTER_GENERATOR must be used at global scope");
4009
4010#define _HALIDE_REGISTER_GENERATOR2(GEN_CLASS_NAME, GEN_REGISTRY_NAME) \
4011 _HALIDE_REGISTER_GENERATOR_IMPL(GEN_CLASS_NAME, GEN_REGISTRY_NAME, GEN_REGISTRY_NAME)
4012
4013#define _HALIDE_REGISTER_GENERATOR3(GEN_CLASS_NAME, GEN_REGISTRY_NAME, FULLY_QUALIFIED_STUB_NAME) \
4014 _HALIDE_REGISTER_GENERATOR_IMPL(GEN_CLASS_NAME, GEN_REGISTRY_NAME, FULLY_QUALIFIED_STUB_NAME)
4015
4016// MSVC has a broken implementation of variadic macros: it expands __VA_ARGS__
4017// as a single token in argument lists (rather than multiple tokens).
4018// Jump through some hoops to work around this.
4019#define __HALIDE_REGISTER_ARGCOUNT_IMPL(_1, _2, _3, COUNT, ...) \
4020 COUNT
4021
4022#define _HALIDE_REGISTER_ARGCOUNT_IMPL(ARGS) \
4023 __HALIDE_REGISTER_ARGCOUNT_IMPL ARGS
4024
4025#define _HALIDE_REGISTER_ARGCOUNT(...) \
4026 _HALIDE_REGISTER_ARGCOUNT_IMPL((__VA_ARGS__, 3, 2, 1, 0))
4027
4028#define ___HALIDE_REGISTER_CHOOSER(COUNT) \
4029 _HALIDE_REGISTER_GENERATOR##COUNT
4030
4031#define __HALIDE_REGISTER_CHOOSER(COUNT) \
4032 ___HALIDE_REGISTER_CHOOSER(COUNT)
4033
4034#define _HALIDE_REGISTER_CHOOSER(COUNT) \
4035 __HALIDE_REGISTER_CHOOSER(COUNT)
4036
4037#define _HALIDE_REGISTER_GENERATOR_PASTE(A, B) \
4038 A B
4039
4040#define HALIDE_REGISTER_GENERATOR(...) \
4041 _HALIDE_REGISTER_GENERATOR_PASTE(_HALIDE_REGISTER_CHOOSER(_HALIDE_REGISTER_ARGCOUNT(__VA_ARGS__)), (__VA_ARGS__))
4042
4043// HALIDE_REGISTER_GENERATOR_ALIAS() can be used to create an an alias-with-a-particular-set-of-param-values
4044// for a given Generator in the build system. Normally, you wouldn't want to do this;
4045// however, some existing Halide clients have build systems that make it challenging to
4046// specify GeneratorParams inside the build system, and this allows a somewhat simpler
4047// customization route for them. It's highly recommended you don't use this for new code.
4048//
4049// The final argument is really an initializer-list of GeneratorParams, in the form
4050// of an initializer-list for map<string, string>:
4051//
4052// { { "gp-name", "gp-value"} [, { "gp2-name", "gp2-value" }] }
4053//
4054// It is specified as a variadic template argument to allow for the fact that the embedded commas
4055// would otherwise confuse the preprocessor; since (in this case) all we're going to do is
4056// pass it thru as-is, this is fine (and even MSVC's 'broken' __VA_ARGS__ should be OK here).
4057#define HALIDE_REGISTER_GENERATOR_ALIAS(GEN_REGISTRY_NAME, ORIGINAL_REGISTRY_NAME, ...) \
4058 namespace halide_register_generator { \
4059 struct halide_global_ns; \
4060 namespace ORIGINAL_REGISTRY_NAME##_ns { \
4061 std::unique_ptr<Halide::Internal::AbstractGenerator> factory(const Halide::GeneratorContext &context); \
4062 } \
4063 namespace GEN_REGISTRY_NAME##_ns { \
4064 std::unique_ptr<Halide::Internal::AbstractGenerator> factory(const Halide::GeneratorContext &context) { \
4065 auto g = ORIGINAL_REGISTRY_NAME##_ns::factory(context); \
4066 const Halide::GeneratorParamsMap m = __VA_ARGS__; \
4067 g->set_generatorparam_values(m); \
4068 return g; \
4069 } \
4070 } \
4071 namespace { \
4072 auto reg_##GEN_REGISTRY_NAME = Halide::Internal::RegisterGenerator(#GEN_REGISTRY_NAME, GEN_REGISTRY_NAME##_ns::factory); \
4073 } \
4074 } \
4075 static_assert(std::is_same<::halide_register_generator::halide_global_ns, halide_register_generator::halide_global_ns>::value, \
4076 "HALIDE_REGISTER_GENERATOR_ALIAS must be used at global scope");
4077
4078// The HALIDE_GENERATOR_PYSTUB macro is used to produce "PyStubs" -- i.e., CPython wrappers to let a C++ Generator
4079// be called from Python. It shouldn't be necessary to use by anything but the build system in most cases.
4080
4081#define HALIDE_GENERATOR_PYSTUB(GEN_REGISTRY_NAME, MODULE_NAME) \
4082 static_assert(PY_MAJOR_VERSION >= 3, "Python bindings for Halide require Python 3+"); \
4083 extern "C" PyObject *_halide_pystub_impl(const char *module_name, const Halide::Internal::GeneratorFactory &factory); \
4084 namespace halide_register_generator::GEN_REGISTRY_NAME##_ns { \
4085 extern std::unique_ptr<Halide::Internal::AbstractGenerator> factory(const Halide::GeneratorContext &context); \
4086 } \
4087 extern "C" HALIDE_EXPORT_SYMBOL PyObject *PyInit_##MODULE_NAME() { \
4088 const auto factory = halide_register_generator::GEN_REGISTRY_NAME##_ns::factory; \
4089 return _halide_pystub_impl(#MODULE_NAME, factory); \
4090 }
4091
4092#endif // HALIDE_GENERATOR_H_
#define internal_error
Definition Errors.h:23
#define user_error
Definition Errors.h:7
#define internal_assert(c)
Definition Errors.h:19
Defines Func - the front-end handle on a halide function, and related classes.
#define HALIDE_GENERATOR_PARAM_TYPED_SETTER(TYPE)
Definition Generator.h:413
#define HALIDE_FORWARD_METHOD(Class, Method)
Definition Generator.h:1651
#define HALIDE_FORWARD_METHOD_CONST(Class, Method)
Definition Generator.h:1657
#define HALIDE_ALWAYS_INLINE
Classes for declaring image parameters to halide pipelines.
Defines methods for introspecting in C++.
Provides a single global registry of Generators, GeneratorParams, and Params indexed by this pointer.
Defines the structure that describes a Halide target.
#define HALIDE_NO_USER_CODE_INLINE
Definition Util.h:46
Type type() const
Definition Buffer.h:533
bool defined() const
Check if this Buffer refers to an existing Buffer.
Definition Buffer.h:381
Helper class for identifying purpose of an Expr passed to memoize.
Definition Func.h:691
A halide function.
Definition Func.h:706
bool defined() const
Does this function have at least a pure definition.
int dimensions() const
The dimensionality (number of arguments) of this function.
const std::vector< Type > & types() const
Realization realize(std::vector< int32_t > sizes={}, const Target &target=Target())
Evaluate this function over some rectangular domain and return the resulting buffer or buffers.
const std::string & name() const
The name of this function, either given during construction, or automatically generated.
Func in(const Func &f)
Creates and returns a new identity Func that wraps this Func.
A fragment of front-end syntax of the form f(x, y, z), where x, y, z are Vars or Exprs.
Definition Func.h:497
GeneratorContext is a class that is used when using Generators (or Stubs) directly; it is used to all...
Definition Generator.h:3008
GeneratorContext with_target(const Target &t) const
GeneratorContext(const Target &t)
std::unique_ptr< T > apply(const Args &...args) const
Definition Generator.h:3039
std::unique_ptr< T > create() const
Definition Generator.h:3035
GeneratorContext & operator=(GeneratorContext &&)=default
GeneratorContext & operator=(const GeneratorContext &)=default
const Target & target() const
Definition Generator.h:3022
GeneratorContext(const Target &t, const AutoschedulerParams &autoscheduler_params)
GeneratorContext(const GeneratorContext &)=default
const AutoschedulerParams & autoscheduler_params() const
Definition Generator.h:3025
GeneratorContext(GeneratorContext &&)=default
void call_generate() override
Definition Generator.h:3863
Generator(Generator &&that)=delete
static std::unique_ptr< T > create(const Halide::GeneratorContext &context, const std::string &registered_name, const std::string &stub_name)
Definition Generator.h:3758
void call_schedule() override
Definition Generator.h:3867
std::unique_ptr< T2 > apply(const Args &...args) const
Definition Generator.h:3780
static std::unique_ptr< T > create(const Halide::GeneratorContext &context)
Definition Generator.h:3749
Generator & operator=(Generator &&that)=delete
Generator & operator=(const Generator &)=delete
void apply(const Args &...args)
Definition Generator.h:3767
void call_configure() override
Definition Generator.h:3859
std::unique_ptr< T2 > create() const
Definition Generator.h:3775
Pipeline build_pipeline() override
Build and return the Pipeline for this AbstractGenerator.
Definition Generator.h:3854
Generator(const Generator &)=delete
typename Internal::select_type< Internal::cond< Internal::has_static_halide_type_method< TBase >::value, int >, Internal::cond< std::is_same< TBase, Func >::value, int >, Internal::cond< true, Unused > >::type IntIfNonScalar
Definition Generator.h:2202
GeneratorInput(size_t array_size, const std::string &name, const Type &t)
Definition Generator.h:2247
GeneratorInput(const std::string &name, const TBase &def)
Definition Generator.h:2212
GeneratorInput(const std::string &name, const TBase &def, const TBase &min, const TBase &max)
Definition Generator.h:2220
typename Super::TBase TBase
Definition Generator.h:2192
GeneratorInput(size_t array_size, const std::string &name, const TBase &def, const TBase &min, const TBase &max)
Definition Generator.h:2225
GeneratorInput(size_t array_size, const std::string &name, IntIfNonScalar d)
Definition Generator.h:2253
GeneratorInput(const std::string &name, const Type &t)
Definition Generator.h:2234
GeneratorInput(size_t array_size, const std::string &name)
Definition Generator.h:2257
GeneratorInput(size_t array_size, const std::string &name, const Type &t, int d)
Definition Generator.h:2243
GeneratorInput(const std::string &name)
Definition Generator.h:2208
GeneratorInput(const std::string &name, const Type &t, int d)
Definition Generator.h:2230
GeneratorInput(size_t array_size, const std::string &name, const TBase &def)
Definition Generator.h:2216
GeneratorInput(const std::string &name, IntIfNonScalar d)
Definition Generator.h:2239
typename Super::TBase TBase
Definition Generator.h:2801
GeneratorOutput(const std::string &name)
Definition Generator.h:2807
GeneratorOutput(const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2835
GeneratorOutput< T > & operator=(const Internal::StubOutputBuffer< T2 > &stub_output_buffer)
Definition Generator.h:2869
GeneratorOutput(const char *name)
Definition Generator.h:2811
GeneratorOutput(const std::string &name, const std::vector< Type > &t)
Definition Generator.h:2827
GeneratorOutput(size_t array_size, const std::string &name, int d)
Definition Generator.h:2839
GeneratorOutput(size_t array_size, const std::string &name, const Type &t, int d)
Definition Generator.h:2851
GeneratorOutput(const std::string &name, const Type &t, int d)
Definition Generator.h:2831
GeneratorOutput< T > & operator=(Buffer< T2, D2 > &buffer)
Definition Generator.h:2863
GeneratorOutput(size_t array_size, const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2855
GeneratorOutput(const std::string &name, int d)
Definition Generator.h:2819
GeneratorOutput(size_t array_size, const std::string &name)
Definition Generator.h:2815
GeneratorOutput(const std::string &name, const Type &t)
Definition Generator.h:2823
GeneratorOutput(size_t array_size, const std::string &name, const std::vector< Type > &t)
Definition Generator.h:2847
GeneratorOutput(size_t array_size, const std::string &name, const Type &t)
Definition Generator.h:2843
GeneratorOutput< T > & operator=(const Func &f)
Definition Generator.h:2874
GeneratorParam is a templated class that can be used to modify the behavior of the Generator at code-...
Definition Generator.h:990
GeneratorParam(const std::string &name, const std::string &value)
Definition Generator.h:1005
GeneratorParam(const std::string &name, const T &value, const T &min, const T &max)
Definition Generator.h:997
GeneratorParam(const std::string &name, const T &value)
Definition Generator.h:993
GeneratorParam(const std::string &name, const T &value, const std::map< std::string, T > &enum_map)
Definition Generator.h:1001
An Image parameter to a halide pipeline.
Definition ImageParam.h:23
AbstractGenerator is an ABC that defines the API a Generator must provide to work with the existing G...
A reference-counted handle to Halide's internal representation of a function.
Definition Function.h:38
GIOBase is the base class for all GeneratorInput<> and GeneratorOutput<> instantiations; it is not pa...
Definition Generator.h:1444
const std::string & name() const
GIOBase & operator=(const GIOBase &)=delete
size_t array_size() const
virtual const char * input_or_output() const =0
GIOBase(size_t array_size, const std::string &name, ArgInfoKind kind, const std::vector< Type > &types, int dims)
void check_matching_dims(int d) const
ArgInfoKind kind() const
bool array_size_defined() const
const std::vector< Type > & gio_types() const
GIOBase & operator=(GIOBase &&)=delete
const std::vector< Func > & funcs() const
std::vector< Type > types_
Definition Generator.h:1486
void check_matching_types(const std::vector< Type > &t) const
std::string array_name(size_t i) const
virtual void check_value_writable() const =0
GIOBase(const GIOBase &)=delete
void check_matching_array_size(size_t size) const
GIOBase(GIOBase &&)=delete
void check_gio_access() const
void set_dimensions(int dims)
void set_array_size(int size)
std::vector< Func > funcs_
Definition Generator.h:1490
const std::string name_
Definition Generator.h:1484
const ArgInfoKind kind_
Definition Generator.h:1485
virtual bool is_array() const
virtual void verify_internals()
virtual ~GIOBase()=default
std::vector< Expr > exprs_
Definition Generator.h:1491
void set_type(const Type &type)
bool gio_types_defined() const
GeneratorBase * generator
Definition Generator.h:1498
const std::vector< Expr > & exprs() const
const std::vector< ElemType > & get_values() const
GeneratorContext context() const override
Return the Target and autoscheduler info that this Generator was created with.
std::string name() override
Return the name of this Generator.
bool allow_out_of_order_inputs_and_outputs() const override
By default, a Generator must declare all Inputs before all Outputs.
GeneratorParam< Target > target
Definition Generator.h:3478
GeneratorBase(size_t size, const void *introspection_helper)
void bind_input(const std::string &name, const std::vector< Parameter > &v) override
Rebind a specified Input to refer to the given piece of IR, replacing the default ImageParam / Param ...
GeneratorInput< T > * add_input(const std::string &name)
Definition Generator.h:3259
std::vector< Func > output_func(const std::string &name) override
Given the name of an output, return the Func(s) for that output.
std::vector< Parameter > input_parameter(const std::string &name) override
Given the name of an input, return the Parameter(s) for that input.
void bind_input(const std::string &name, const std::vector< Func > &v) override
void bind_input(const std::string &name, const std::vector< Expr > &v) override
bool emit_hlpipe(const std::string &hlpipe_file_path) override
Emit a Serialized Halide Pipeline (.hlpipe) file to the given path.
Realization realize(Args &&...args)
Definition Generator.h:3200
GeneratorBase(const GeneratorBase &)=delete
GeneratorOutput< T > * add_output(const std::string &name)
Definition Generator.h:3336
int natural_vector_size() const
Given a data type, return an estimate of the "natural" vector size for that data type when compiling ...
Definition Generator.h:3168
virtual void init_from_context(const Halide::GeneratorContext &context)
void check_exact_phase(Phase expected_phase) const
void set_generatorparam_value(const std::string &name, const LoopLevel &loop_level) override
void check_min_phase(Phase expected_phase) const
void realize(Realization r)
Definition Generator.h:3205
enum Halide::Internal::GeneratorBase::Phase Created
void set_generator_names(const std::string &registered_name, const std::string &stub_name)
Realization realize(std::vector< int32_t > sizes)
Definition Generator.h:3192
GeneratorInput< T > * add_input(const std::string &name, int dimensions)
Definition Generator.h:3245
std::vector< ArgInfo > arginfos() override
Return a list of all the ArgInfos for this generator.
GeneratorInput< T > * add_input(const std::string &name, const Type &type)
Definition Generator.h:3283
void set_generatorparam_value(const std::string &name, const std::string &value) override
Set the value for a specific GeneratorParam for an AbstractGenerator instance.
GeneratorBase(GeneratorBase &&that)=delete
GeneratorOutput< T > * add_output(const std::string &name, int dimensions)
Definition Generator.h:3322
bool emit_cpp_stub(const std::string &stub_file_path) override
Emit a Generator Stub (.stub.h) file to the given path.
GeneratorBase & operator=(const GeneratorBase &)=delete
GeneratorBase & operator=(GeneratorBase &&that)=delete
void set_inputs(const Args &...args)
set_inputs is a variadic wrapper around set_inputs_vector, which makes usage much simpler in many cas...
Definition Generator.h:3183
GeneratorParam_AutoSchedulerParams autoscheduler_
Definition Generator.h:3479
HALIDE_NO_USER_CODE_INLINE void add_requirement(const Expr &condition, Args &&...error_args)
Definition Generator.h:3351
GeneratorInput< T > * add_input(const std::string &name, const Type &t, int dimensions)
Definition Generator.h:3219
void add_requirement(const Expr &condition, const std::vector< Expr > &error_args)
int natural_vector_size(Halide::Type t) const
Given a data type, return an estimate of the "natural" vector size for that data type when compiling ...
Definition Generator.h:3161
void advance_phase(Phase new_phase)
GeneratorOutput< T > * add_output(const std::string &name, const Type &t, int dimensions)
Definition Generator.h:3296
GeneratorFactoryProvider provides a way to customize the Generators that are visible to generate_filt...
Definition Generator.h:331
virtual AbstractGeneratorPtr create(const std::string &name, const Halide::GeneratorContext &context) const =0
Create an instance of the Generator that is registered under the given name.
GeneratorFactoryProvider(const GeneratorFactoryProvider &)=delete
GeneratorFactoryProvider & operator=(GeneratorFactoryProvider &&)=delete
GeneratorFactoryProvider(GeneratorFactoryProvider &&)=delete
GeneratorFactoryProvider & operator=(const GeneratorFactoryProvider &)=delete
virtual std::vector< std::string > enumerate() const =0
Return a list of all registered Generators that are available for use with the create() method.
GeneratorInput_Arithmetic(size_t array_size, const std::string &name)
Definition Generator.h:2137
GeneratorInput_Arithmetic(const std::string &name, const TBase &def, const TBase &min, const TBase &max)
Definition Generator.h:2148
GeneratorInput_Arithmetic(size_t array_size, const std::string &name, const TBase &def)
Definition Generator.h:2142
GeneratorInput_Arithmetic(const std::string &name)
Definition Generator.h:2128
GeneratorInput_Arithmetic(size_t array_size, const std::string &name, const TBase &def, const TBase &min, const TBase &max)
Definition Generator.h:2155
GeneratorInput_Arithmetic(const std::string &name, const TBase &def)
Definition Generator.h:2132
std::string get_c_type() const override
Definition Generator.h:1676
GeneratorInput_Buffer< T > & set_estimate(Var var, Expr min, Expr extent)
Definition Generator.h:1743
GeneratorInput_Buffer(const std::string &name, const Type &t)
Definition Generator.h:1704
GeneratorInput_Buffer(const std::string &name)
Definition Generator.h:1692
GeneratorInput_Buffer(const std::string &name, const Type &t, int d)
Definition Generator.h:1698
std::vector< ImageParam >::const_iterator end() const
Definition Generator.h:1801
Expr operator()(std::vector< Expr > args) const
Definition Generator.h:1722
std::vector< ImageParam >::const_iterator begin() const
Definition Generator.h:1795
Expr operator()(Args &&...args) const
Definition Generator.h:1717
Func in(const std::vector< Func > &others)
Definition Generator.h:1765
GeneratorInput_Buffer< T > & set_estimates(const Region &estimates)
Definition Generator.h:1749
ImageParam operator[](size_t i) const
Definition Generator.h:1783
ImageParam at(size_t i) const
Definition Generator.h:1789
GeneratorInput_Buffer(const std::string &name, int d)
Definition Generator.h:1709
std::string get_c_type() const override
Definition Generator.h:1959
GeneratorInput_DynamicScalar(const std::string &name)
Definition Generator.h:1964
GeneratorInput_Func(size_t array_size, const std::string &name, int d)
Definition Generator.h:1869
Expr operator()(Args &&...args) const
Definition Generator.h:1884
Func in(const std::vector< Func > &others)
Definition Generator.h:1926
GeneratorInput_Func< T > & set_estimates(const Region &estimates)
Definition Generator.h:1910
GeneratorInput_Func< T > & set_estimate(Var var, Expr min, Expr extent)
Definition Generator.h:1904
GeneratorInput_Func(size_t array_size, const std::string &name, const Type &t, int d)
Definition Generator.h:1864
GeneratorInput_Func(const std::string &name, int d)
Definition Generator.h:1850
GeneratorInput_Func(const std::string &name, const Type &t)
Definition Generator.h:1855
GeneratorInput_Func(size_t array_size, const std::string &name, const Type &t)
Definition Generator.h:1874
Expr operator()(const std::vector< Expr > &args) const
Definition Generator.h:1889
std::string get_c_type() const override
Definition Generator.h:1835
GeneratorInput_Func(const std::string &name, const Type &t, int d)
Definition Generator.h:1845
GeneratorInput_Func(const std::string &name)
Definition Generator.h:1860
GeneratorInput_Func(size_t array_size, const std::string &name)
Definition Generator.h:1879
GeneratorInput_Scalar(size_t array_size, const std::string &name)
Definition Generator.h:2040
static Expr TBaseToExpr(const TBase2 &value)
Definition Generator.h:2021
void set_estimate(const TBase &value)
Definition Generator.h:2066
void set_estimate(size_t index, const TBase &value)
Definition Generator.h:2088
GeneratorInput_Scalar(size_t array_size, const std::string &name, const TBase &def)
Definition Generator.h:2045
GeneratorInput_Scalar(const std::string &name)
Definition Generator.h:2032
GeneratorInput_Scalar(const std::string &name, const TBase &def)
Definition Generator.h:2036
std::string get_c_type() const override
Definition Generator.h:2014
void set_inputs(const std::vector< StubInput > &inputs)
virtual std::string get_c_type() const =0
void set_estimate_impl(const Var &var, const Expr &min, const Expr &extent)
std::vector< Parameter > parameters_
Definition Generator.h:1552
const char * input_or_output() const override
Definition Generator.h:1570
GeneratorInputBase(const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
void set_estimates_impl(const Region &estimates)
void check_value_writable() const override
GeneratorInputBase(size_t array_size, const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
const ValueType & operator[](size_t i) const
Definition Generator.h:1619
GeneratorInputImpl(const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
Definition Generator.h:1593
const ValueType & at(size_t i) const
Definition Generator.h:1625
typename std::remove_all_extents< T >::type TBase
Definition Generator.h:1584
std::vector< ValueType >::const_iterator end() const
Definition Generator.h:1637
std::vector< ValueType >::const_iterator begin() const
Definition Generator.h:1631
GeneratorOutput_Arithmetic(const std::string &name)
Definition Generator.h:2777
GeneratorOutput_Arithmetic(size_t array_size, const std::string &name)
Definition Generator.h:2781
GeneratorOutput_Buffer(const std::string &name, int d)
Definition Generator.h:2540
GeneratorOutput_Buffer(size_t array_size, const std::string &name)
Definition Generator.h:2548
GeneratorOutput_Buffer(size_t array_size, const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2554
GeneratorOutput_Buffer< T > & operator=(const StubOutputBuffer< T2 > &stub_output_buffer)
Definition Generator.h:2627
GeneratorOutput_Buffer(const std::string &name)
Definition Generator.h:2520
HALIDE_NO_USER_CODE_INLINE std::string get_c_type() const override
Definition Generator.h:2576
GeneratorOutput_Buffer< T > & set_estimates(const Region &estimates)
Definition Generator.h:2651
HALIDE_NO_USER_CODE_INLINE T2 as() const
Definition Generator.h:2587
GeneratorOutput_Buffer(const std::string &name, const std::vector< Type > &t)
Definition Generator.h:2534
GeneratorOutput_Buffer(size_t array_size, const std::string &name, int d)
Definition Generator.h:2568
GeneratorOutput_Buffer< T > & operator=(const Func &f)
Definition Generator.h:2636
HALIDE_NO_USER_CODE_INLINE GeneratorOutput_Buffer< T > & operator=(Buffer< T2, D2 > &buffer)
Definition Generator.h:2599
const Func & operator[](size_t i) const
Definition Generator.h:2659
GeneratorOutput_Buffer(size_t array_size, const std::string &name, const std::vector< Type > &t)
Definition Generator.h:2562
GeneratorOutput_Buffer(const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2526
const Func & operator[](size_t i) const
Definition Generator.h:2745
GeneratorOutput_Func(const std::string &name)
Definition Generator.h:2702
GeneratorOutput_Func< T > & operator=(const Func &f)
Definition Generator.h:2725
GeneratorOutput_Func(const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2706
GeneratorOutput_Func(size_t array_size, const std::string &name, const std::vector< Type > &t, int d)
Definition Generator.h:2718
GeneratorOutput_Func(const std::string &name, int d)
Definition Generator.h:2714
GeneratorOutput_Func< T > & set_estimate(const Var &var, const Expr &min, const Expr &extent)
Definition Generator.h:2750
GeneratorOutput_Func(const std::string &name, const std::vector< Type > &t)
Definition Generator.h:2710
GeneratorOutput_Func< T > & set_estimates(const Region &estimates)
Definition Generator.h:2759
const char * input_or_output() const override
Definition Generator.h:2369
GeneratorOutputBase(const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
virtual std::string get_c_type() const
Definition Generator.h:2363
HALIDE_NO_USER_CODE_INLINE T2 as() const
Definition Generator.h:2267
void check_value_writable() const override
GeneratorOutputBase(size_t array_size, const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
Forward schedule-related methods to the underlying Func.
std::vector< ValueType >::const_iterator end() const
Definition Generator.h:2458
const ValueType & operator[](size_t i) const
Definition Generator.h:2440
GeneratorOutputImpl(const std::string &name, ArgInfoKind kind, const std::vector< Type > &t, int d)
Definition Generator.h:2390
const ValueType & at(size_t i) const
Definition Generator.h:2446
std::vector< ValueType >::const_iterator begin() const
Definition Generator.h:2452
FuncRef operator()(std::vector< ExprOrVar > args) const
Definition Generator.h:2416
typename std::remove_all_extents< T >::type TBase
Definition Generator.h:2380
FuncRef operator()(Args &&...args) const
Definition Generator.h:2410
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:742
std::string get_c_type() const override
Definition Generator.h:779
GeneratorParam_Arithmetic(const std::string &name, const T &value, const T &min=std::numeric_limits< T >::lowest(), const T &max=std::numeric_limits< T >::max())
Definition Generator.h:728
std::string get_default_value() const override
Definition Generator.h:759
std::string call_to_string(const std::string &v) const override
Definition Generator.h:773
void set_impl(const T &new_value) override
Definition Generator.h:737
void set_from_string(const std::string &new_value_string) override
std::string call_to_string(const std::string &v) const override
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:808
std::string get_default_value() const override
Definition Generator.h:820
std::string call_to_string(const std::string &v) const override
Definition Generator.h:824
GeneratorParam_Bool(const std::string &name, const T &value)
Definition Generator.h:804
std::string get_c_type() const override
Definition Generator.h:830
std::string call_to_string(const std::string &v) const override
Definition Generator.h:856
std::string get_default_value() const override
Definition Generator.h:864
GeneratorParam_Enum(const std::string &name, const T &value, const std::map< std::string, T > &enum_map)
Definition Generator.h:838
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:850
std::string get_c_type() const override
Definition Generator.h:860
std::string get_type_decls() const override
Definition Generator.h:868
GeneratorParam_LoopLevel(const std::string &name, const LoopLevel &value)
Definition Generator.h:653
std::string get_c_type() const override
Definition Generator.h:716
std::string call_to_string(const std::string &v) const override
Definition Generator.h:711
void set(const LoopLevel &value) override
Definition Generator.h:659
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:679
std::string get_default_value() const override
Definition Generator.h:689
GeneratorParam_String(const std::string &name, const std::string &value)
Definition Generator.h:921
std::string get_c_type() const override
Definition Generator.h:936
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:924
std::string get_default_value() const override
Definition Generator.h:928
std::string call_to_string(const std::string &v) const override
Definition Generator.h:932
std::string call_to_string(const std::string &v) const override
Definition Generator.h:2916
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:2902
std::string get_default_value() const override
Definition Generator.h:2911
std::string get_c_type() const override
Definition Generator.h:2921
void set_from_string(const std::string &new_value_string) override
Definition Generator.h:617
GeneratorParam_Target(const std::string &name, const T &value)
Definition Generator.h:613
std::string get_c_type() const override
Definition Generator.h:631
std::string get_default_value() const override
Definition Generator.h:621
std::string call_to_string(const std::string &v) const override
Definition Generator.h:625
std::string get_type_decls() const override
Definition Generator.h:913
std::string get_c_type() const override
Definition Generator.h:905
std::string call_to_string(const std::string &v) const override
Definition Generator.h:901
std::string get_default_value() const override
Definition Generator.h:909
GeneratorParam_Type(const std::string &name, const T &value)
Definition Generator.h:897
virtual bool is_synthetic_param() const
Definition Generator.h:462
GeneratorParamBase(GeneratorParamBase &&)=delete
virtual std::string call_to_string(const std::string &v) const =0
void fail_wrong_type(const char *type)
virtual std::string get_type_decls() const
Definition Generator.h:456
GeneratorParamBase(const std::string &name)
virtual std::string get_default_value() const =0
void set(const std::string &new_value)
Definition Generator.h:435
GeneratorParamBase(const GeneratorParamBase &)=delete
virtual std::string get_c_type() const =0
virtual bool is_looplevel_param() const
Definition Generator.h:466
virtual void set_from_string(const std::string &value_string)=0
GeneratorParamBase & operator=(GeneratorParamBase &&)=delete
const std::string & name() const
Definition Generator.h:401
GeneratorParamBase & operator=(const GeneratorParamBase &)=delete
void set(const char *new_value)
Definition Generator.h:438
void set(const std::string &new_value)
Definition Generator.h:549
GeneratorParamImpl(const std::string &name, const T &value)
Definition Generator.h:508
virtual void set_impl(const T &new_value)
Definition Generator.h:555
const std::vector< Internal::GeneratorInputBase * > & inputs() const
Definition Generator.h:3147
const std::vector< Internal::GeneratorParamBase * > & generator_params() const
Definition Generator.h:3144
GeneratorParamInfo(GeneratorBase *generator, size_t size)
const std::vector< Internal::GeneratorOutputBase * > & outputs() const
Definition Generator.h:3150
GeneratorRegistry(const GeneratorRegistry &)=delete
static AbstractGeneratorPtr create(const std::string &name, const Halide::GeneratorContext &context)
GeneratorRegistry & operator=(GeneratorRegistry &&that)=delete
GeneratorRegistry(GeneratorRegistry &&that)=delete
GeneratorRegistry & operator=(const GeneratorRegistry &)=delete
static void register_factory(const std::string &name, GeneratorFactory generator_factory)
static std::vector< std::string > enumerate()
static void unregister_factory(const std::string &name)
RegisterGenerator(const char *registered_name, GeneratorFactory generator_factory)
StubInputBuffer is the placeholder that a Stub uses when it requires a Buffer for an input (rather th...
Definition Generator.h:1265
static std::vector< Parameter > to_parameter_vector(const StubInputBuffer< T2 > &t)
Definition Generator.h:1305
StubInputBuffer(const Buffer< T2, D2 > &b)
Definition Generator.h:1300
static std::vector< Parameter > to_parameter_vector(const std::vector< StubInputBuffer< T2 > > &v)
Definition Generator.h:1310
ArgInfoKind kind() const
Definition Generator.h:1406
StubInput(const StubInputBuffer< T2 > &b)
Definition Generator.h:1393
StubInput(const Parameter &p)
Definition Generator.h:1396
Parameter parameter() const
Definition Generator.h:1410
std::shared_ptr< AbstractGenerator > generator
Definition Generator.h:1325
Realization realize(Args &&...args)
Definition Generator.h:1336
StubOutputBufferBase(const Func &f, const std::shared_ptr< AbstractGenerator > &generator)
Realization realize(std::vector< int32_t > sizes)
StubOutputBuffer is the placeholder that a Stub uses when it requires a Buffer for an output (rather ...
Definition Generator.h:1359
static std::vector< StubOutputBuffer< T > > to_output_buffers(const std::vector< Func > &v, const std::shared_ptr< AbstractGenerator > &gen)
Definition Generator.h:1369
A reference to a site in a Halide statement at the top of the body of a particular for loop.
Definition Schedule.h:203
static LoopLevel root()
Construct a special LoopLevel value which represents the location outside of all for loops.
static LoopLevel inlined()
Construct a special LoopLevel value that implies that a function should be inlined away.
void set(const LoopLevel &other)
Mutate our contents to match the contents of 'other'.
bool is_root() const
bool is_inlined() const
LoopLevel & lock()
Halide::Target Target
Definition Generator.h:3070
static Type Bool(int lanes=1)
Definition Generator.h:3087
static Expr cast(Expr e)
Definition Generator.h:3075
static Expr cast(Halide::Type t, Expr e)
Definition Generator.h:3078
static Type UInt(int bits, int lanes=1)
Definition Generator.h:3096
static Type Int(int bits, int lanes=1)
Definition Generator.h:3093
static Type Float(int bits, int lanes=1)
Definition Generator.h:3090
Halide::Pipeline Pipeline
Definition Generator.h:3065
A handle on the output buffer of a pipeline.
A scalar parameter to a halide pipeline.
Definition Param.h:22
A reference-counted handle to a parameter to a halide pipeline.
Definition Parameter.h:40
void set_default_value(const Expr &e)
Get and set the default values for scalar parameters.
void set_estimate(Expr e)
A class representing a Halide pipeline.
Definition Pipeline.h:107
void trace_pipeline()
Generate begin_pipeline and end_pipeline tracing calls for this pipeline.
Realization realize(std::vector< int32_t > sizes={}, const Target &target=Target())
See Func::realize.
A multi-dimensional domain over which to iterate.
Definition RDom.h:193
A reduction variable represents a single dimension of a reduction domain (RDom).
Definition RDom.h:29
A Realization is a vector of references to existing Buffer objects.
Definition Realization.h:19
A single definition of a Func.
Definition Func.h:69
Create a small array of Exprs for defining and calling functions with multiple outputs.
Definition Tuple.h:18
A Halide variable, to be used when defining functions.
Definition Var.h:19
auto max_forward(const Other &a, const GeneratorParam< T > &b) -> decltype(max(a,(T) b))
Definition Generator.h:1207
auto min_forward(const Other &a, const GeneratorParam< T > &b) -> decltype(min(a,(T) b))
Definition Generator.h:1198
std::function< AbstractGeneratorPtr(const GeneratorContext &context)> GeneratorFactory
Definition Generator.h:3116
int generate_filter_main(int argc, char **argv)
generate_filter_main() is a convenient wrapper for GeneratorRegistry::create() + compile_to_files(); ...
std::string halide_type_to_enum_string(const Type &t)
Definition Generator.h:316
std::vector< Expr > parameter_constraints(const Parameter &p)
Expr make_const(Type t, int64_t val)
Construct an immediate of the given type from any numeric C++ type.
std::string halide_type_to_c_source(const Type &t)
HALIDE_NO_USER_CODE_INLINE std::string enum_to_string(const std::map< std::string, T > &enum_map, const T &t)
Definition Generator.h:298
std::vector< Type > parse_halide_type_list(const std::string &types)
std::string halide_type_to_c_type(const Type &t)
std::string print_loop_nest(const std::vector< Function > &output_funcs)
Emit some simple pseudocode that shows the structure of the loop nest specified by this pipeline's sc...
typename select_type< cond< has_static_halide_type_method< TBase >::value, GeneratorOutput_Buffer< T > >, cond< std::is_same< TBase, Func >::value, GeneratorOutput_Func< T > >, cond< std::is_arithmetic< TBase >::value, GeneratorOutput_Arithmetic< T > > >::type GeneratorOutputImplBase
Definition Generator.h:2791
typename select_type< cond< has_static_halide_type_method< TBase >::value, GeneratorInput_Buffer< T > >, cond< std::is_same< TBase, Func >::value, GeneratorInput_Func< T > >, cond< std::is_arithmetic< TBase >::value, GeneratorInput_Arithmetic< T > >, cond< std::is_scalar< TBase >::value, GeneratorInput_Scalar< T > >, cond< std::is_same< TBase, Expr >::value, GeneratorInput_DynamicScalar< T > > >::type GeneratorInputImplBase
Definition Generator.h:2182
typename select_type< cond< std::is_same< T, Target >::value, GeneratorParam_Target< T > >, cond< std::is_same< T, LoopLevel >::value, GeneratorParam_LoopLevel >, cond< std::is_same< T, std::string >::value, GeneratorParam_String< T > >, cond< std::is_same< T, Type >::value, GeneratorParam_Type< T > >, cond< std::is_same< T, bool >::value, GeneratorParam_Bool< T > >, cond< std::is_arithmetic< T >::value, GeneratorParam_Arithmetic< T > >, cond< std::is_enum< T >::value, GeneratorParam_Enum< T > > >::type GeneratorParamImplBase
Definition Generator.h:950
std::unique_ptr< AbstractGenerator > AbstractGeneratorPtr
void execute_generator(const ExecuteGeneratorArgs &args)
Execute a Generator for AOT compilation – this provides the implementation of the command-line Genera...
HALIDE_NO_USER_CODE_INLINE void collect_print_args(std::vector< Expr > &args)
Definition IROperator.h:335
const GeneratorFactoryProvider & get_registered_generators()
Return a GeneratorFactoryProvider that knows about all the currently-registered C++ Generators.
T parse_scalar(const std::string &value)
Definition Generator.h:2883
const std::map< std::string, Halide::Type > & get_halide_type_enum_map()
T enum_from_string(const std::map< std::string, T > &enum_map, const std::string &s)
Definition Generator.h:309
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
auto operator>=(const Other &a, const GeneratorParam< T > &b) -> decltype(a >=(T) b)
Greater than or equal comparison between GeneratorParam<T> and any type that supports operator>= with...
Definition Generator.h:1105
Type UInt(int bits, int lanes=1)
Constructing an unsigned integer type.
Definition Type.h:535
Expr reinterpret(Type t, Expr e)
Reinterpret the bits of one value as another type.
Type Float(int bits, int lanes=1)
Construct a floating-point type.
Definition Type.h:540
auto operator==(const Other &a, const GeneratorParam< T > &b) -> decltype(a==(T) b)
Equality comparison between GeneratorParam<T> and any type that supports operator== with T.
Definition Generator.h:1131
@ Internal
Not visible externally, similar to 'static' linkage in C.
auto operator<(const Other &a, const GeneratorParam< T > &b) -> decltype(a<(T) b)
Less than comparison between GeneratorParam<T> and any type that supports operator< with T.
Definition Generator.h:1092
std::map< std::string, std::string > GeneratorParamsMap
auto operator*(const Other &a, const GeneratorParam< T > &b) -> decltype(a *(T) b)
Multiplication between GeneratorParam<T> and any type that supports operator* with T.
Definition Generator.h:1040
auto operator||(const Other &a, const GeneratorParam< T > &b) -> decltype(a||(T) b)
Logical or between between GeneratorParam<T> and any type that supports operator|| with T.
Definition Generator.h:1174
PrefetchBoundStrategy
Different ways to handle accesses outside the original extents in a prefetch.
auto operator-(const Other &a, const GeneratorParam< T > &b) -> decltype(a -(T) b)
Subtraction between GeneratorParam<T> and any type that supports operator- with T.
Definition Generator.h:1027
Expr cast(Expr a)
Cast an expression to the halide type corresponding to the C++ type T.
Definition IROperator.h:364
auto operator!(const GeneratorParam< T > &a) -> decltype(!(T) a)
Not operator for GeneratorParam.
Definition Generator.h:1246
TailStrategy
Different ways to handle a tail case in a split when the factor does not provably divide the extent.
Definition Schedule.h:33
std::function< std::unique_ptr< Internal::CompilerLogger >(const std::string &fn_name, const Target &target)> CompilerLoggerFactory
Definition Module.h:243
Type Int(int bits, int lanes=1)
Constructing a signed integer type.
Definition Type.h:530
auto operator+(const Other &a, const GeneratorParam< T > &b) -> decltype(a+(T) b)
Addition between GeneratorParam<T> and any type that supports operator+ with T.
Definition Generator.h:1014
Callable create_callable_from_generator(const GeneratorContext &context, const std::string &name, const GeneratorParamsMap &generator_params={})
Create a Generator from the currently-registered Generators, use it to create a Callable.
Expr min(const FuncRef &a, const FuncRef &b)
Explicit overloads of min and max for FuncRef.
Definition Func.h:603
auto operator&&(const Other &a, const GeneratorParam< T > &b) -> decltype(a &&(T) b)
Logical and between between GeneratorParam<T> and any type that supports operator&& with T.
Definition Generator.h:1157
auto operator%(const Other &a, const GeneratorParam< T > &b) -> decltype(a %(T) b)
Modulo between GeneratorParam<T> and any type that supports operator% with T.
Definition Generator.h:1066
NameMangling
An enum to specify calling convention for extern stages.
Definition Function.h:25
auto operator<=(const Other &a, const GeneratorParam< T > &b) -> decltype(a<=(T) b)
Less than or equal comparison between GeneratorParam<T> and any type that supports operator<= with T.
Definition Generator.h:1118
auto operator>(const Other &a, const GeneratorParam< T > &b) -> decltype(a >(T) b)
Greater than comparison between GeneratorParam<T> and any type that supports operator> with T.
Definition Generator.h:1079
auto operator!=(const Other &a, const GeneratorParam< T > &b) -> decltype(a !=(T) b)
Inequality comparison between between GeneratorParam<T> and any type that supports operator!...
Definition Generator.h:1144
Type Bool(int lanes=1)
Construct a boolean type.
Definition Type.h:550
std::vector< Range > Region
A multi-dimensional box.
Definition Expr.h:345
auto operator/(const Other &a, const GeneratorParam< T > &b) -> decltype(a/(T) b)
Division between GeneratorParam<T> and any type that supports operator/ with T.
Definition Generator.h:1053
Expr max(const FuncRef &a, const FuncRef &b)
Definition Func.h:606
MemoryType
An enum describing different address spaces to be used with Func::store_in.
Definition Expr.h:348
Partition
Different ways to handle loops with a potentially optimizable boundary conditions.
unsigned __INT64_TYPE__ uint64_t
signed __INT64_TYPE__ int64_t
signed __INT32_TYPE__ int32_t
unsigned __INT8_TYPE__ uint8_t
unsigned __INT16_TYPE__ uint16_t
unsigned __INT32_TYPE__ uint32_t
signed __INT16_TYPE__ int16_t
signed __INT8_TYPE__ int8_t
Special the Autoscheduler to be used (if any), along with arbitrary additional arguments specific to ...
Definition Pipeline.h:48
A fragment of Halide syntax.
Definition Expr.h:258
HALIDE_ALWAYS_INLINE Type type() const
Get the type of this expression node.
Definition Expr.h:322
HALIDE_ALWAYS_INLINE const Internal::BaseExprNode * get() const
Override get() to return a BaseExprNode * instead of an IRNode *.
Definition Expr.h:316
An argument to an extern-defined Func.
static TO2 value(const FROM &from)
Definition Generator.h:493
The Dim struct represents one loop in the schedule's representation of a loop nest.
Definition Schedule.h:457
ExecuteGeneratorArgs is the set of arguments to execute_generator().
Definition Generator.h:3894
CompilerLoggerFactory compiler_logger_factory
Definition Generator.h:3955
enum Halide::Internal::ExecuteGeneratorArgs::BuildMode build_mode
std::set< OutputFileType > output_types
Definition Generator.h:3899
std::vector< std::string > suffixes
Definition Generator.h:3909
std::function< AbstractGeneratorPtr(const std::string &name, const GeneratorContext &context)> CreateGeneratorFn
Definition Generator.h:3944
HALIDE_ALWAYS_INLINE bool defined() const
static constexpr bool value
Definition Generator.h:382
typename std::conditional< First::value, typename First::type, void >::type type
Definition Generator.h:391
A struct representing a target machine and os to generate code for.
Definition Target.h:19
int natural_vector_size(const Halide::Type &t) const
Given a data type, return an estimate of the "natural" vector size for that data type when compiling ...
Types in the halide type system.
Definition Type.h:276
#define user_assert(c)
Definition test.h:10