Halide 17.0.2
Halide compiler and libraries
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Pipeline.h
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1#ifndef HALIDE_PIPELINE_H
2#define HALIDE_PIPELINE_H
3
4/** \file
5 *
6 * Defines the front-end class representing an entire Halide imaging
7 * pipeline.
8 */
9
10#include <initializer_list>
11#include <map>
12#include <memory>
13#include <vector>
14
15#include "IROperator.h"
16#include "IntrusivePtr.h"
17#include "JITModule.h"
18#include "Module.h"
19#include "Realization.h"
20#include "Target.h"
21#include "Tuple.h"
22
23namespace Halide {
24
25struct Argument;
26class Callable;
27class Func;
28struct PipelineContents;
29
30/** Special the Autoscheduler to be used (if any), along with arbitrary
31 * additional arguments specific to the given Autoscheduler.
32 *
33 * The 'name' field specifies the type of Autoscheduler
34 * to be used (e.g. Adams2019, Mullapudi2016). If this is an empty string,
35 * no autoscheduling will be done; if not, it mustbe the name of a known Autoscheduler.
36 *
37 * At this time, well-known autoschedulers include:
38 * "Mullapudi2016" -- heuristics-based; the first working autoscheduler; currently built in to libHalide
39 * see http://graphics.cs.cmu.edu/projects/halidesched/
40 * "Adams2019" -- aka "the ML autoscheduler"; currently located in apps/autoscheduler
41 * see https://halide-lang.org/papers/autoscheduler2019.html
42 * "Li2018" -- aka "the gradient autoscheduler"; currently located in apps/gradient_autoscheduler.
43 * see https://people.csail.mit.edu/tzumao/gradient_halide
44 *
45 * The key/value pairs in 'extra' are defined on a per-autoscheduler basis.
46 * An autoscheduler can have any number of required or optional keys.
47 */
49 std::string name;
50 std::map<std::string, std::string> extra;
51
53 /*not-explicit*/ AutoschedulerParams(const std::string &name)
54 : name(name) {
55 }
56 AutoschedulerParams(const std::string &name, const std::map<std::string, std::string> &extra)
57 : name(name), extra(extra) {
58 }
59
60 std::string to_string() const;
61};
62
63namespace Internal {
64class IRMutator;
65struct JITCache;
66struct JITCallArgs;
67} // namespace Internal
68
69/**
70 * Used to determine if the output printed to file should be as a normal string
71 * or as an HTML file which can be opened in a browerser and manipulated via JS and CSS.*/
74 HTML
75};
76
77namespace {
78// Helper for deleting custom lowering passes. In the header so that
79// it goes in user code on windows, where you can have multiple heaps.
80template<typename T>
81void delete_lowering_pass(T *pass) {
82 delete pass;
83}
84} // namespace
85
86/** A custom lowering pass. See Pipeline::add_custom_lowering_pass. */
89 std::function<void()> deleter;
90};
91
92struct JITExtern;
93
95 Target target; // Target specified to the autoscheduler
96 AutoschedulerParams autoscheduler_params; // The autoscheduler used, along with its params
97 std::string schedule_source; // The C++ source code of the generated schedule
98 std::vector<uint8_t> featurization; // The featurization of the pipeline (if any)
99};
100
101class Pipeline;
102
103using AutoSchedulerFn = std::function<void(const Pipeline &, const Target &, const AutoschedulerParams &, AutoSchedulerResults *outputs)>;
104
105/** A class representing a Halide pipeline. Constructed from the Func
106 * or Funcs that it outputs. */
107class Pipeline {
108public:
110 // Only one of the following may be non-null
111 Realization *r{nullptr};
113 std::unique_ptr<std::vector<Buffer<>>> buffer_list;
114
116 : r(&r) {
117 }
119 : r(&r) {
120 }
122 : buf(buf) {
123 }
124 template<typename T, int Dims>
126 : buf(dst.raw_buffer()) {
127 }
128 template<typename T, int Dims>
130 : buf(dst.raw_buffer()) {
131 }
132 template<typename T, int Dims, typename... Args,
133 typename = typename std::enable_if<Internal::all_are_convertible<Buffer<>, Args...>::value>::type>
134 RealizationArg(Buffer<T, Dims> &a, Args &&...args)
135 : buffer_list(std::make_unique<std::vector<Buffer<>>>(std::initializer_list<Buffer<>>{a, std::forward<Args>(args)...})) {
136 }
138
139 size_t size() const {
140 if (r != nullptr) {
141 return r->size();
142 } else if (buffer_list) {
143 return buffer_list->size();
144 }
145 return 1;
146 }
147 };
148
149private:
151
152 // For the three method below, precisely one of the first two args should be non-null
153 void prepare_jit_call_arguments(RealizationArg &output, const Target &target,
154 JITUserContext **user_context, bool is_bounds_inference, Internal::JITCallArgs &args_result);
155
156 static std::vector<Internal::JITModule> make_externs_jit_module(const Target &target,
157 std::map<std::string, JITExtern> &externs_in_out);
158
159 static std::map<std::string, AutoSchedulerFn> &get_autoscheduler_map();
160
161 static AutoSchedulerFn find_autoscheduler(const std::string &autoscheduler_name);
162
163 int call_jit_code(const Target &target, const Internal::JITCallArgs &args);
164
165 // Get the value of contents->jit_target, but reality-check that the contents
166 // sensibly match the value. Return Target() if not jitted.
167 Target get_compiled_jit_target() const;
168
169 static Internal::JITCache compile_jit_cache(const Module &module,
170 std::vector<Argument> args,
171 const std::vector<Internal::Function> &outputs,
172 const std::map<std::string, JITExtern> &jit_externs,
173 const Target &target_arg);
174
175public:
176 /** Make an undefined Pipeline object. */
178
179 /** Make a pipeline that computes the given Func. Schedules the
180 * Func compute_root(). */
181 Pipeline(const Func &output);
182
183 /** Make a pipeline that computes the givens Funcs as
184 * outputs. Schedules the Funcs compute_root(). */
185 Pipeline(const std::vector<Func> &outputs);
186
187 /** Make a pipeline from deserialization. */
188 Pipeline(const std::vector<Func> &outputs, const std::vector<Internal::Stmt> &requirements);
189
190 std::vector<Argument> infer_arguments(const Internal::Stmt &body);
191
192 /** Get the Funcs this pipeline outputs. */
193 std::vector<Func> outputs() const;
194
195 /** Get the requirements of this pipeline. */
196 std::vector<Internal::Stmt> requirements() const;
197
198 /** Generate a schedule for the pipeline using the specified autoscheduler. */
200 const AutoschedulerParams &autoscheduler_params) const;
201
202 /** Add a new the autoscheduler method with the given name. Does not affect the current default autoscheduler.
203 * It is an error to call this with the same name multiple times. */
204 static void add_autoscheduler(const std::string &autoscheduler_name, const AutoSchedulerFn &autoscheduler);
205
206 /** Return handle to the index-th Func within the pipeline based on the
207 * topological order. */
208 Func get_func(size_t index);
209
210 /** Compile and generate multiple target files with single call.
211 * Deduces target files based on filenames specified in
212 * output_files map.
213 */
214 void compile_to(const std::map<OutputFileType, std::string> &output_files,
215 const std::vector<Argument> &args,
216 const std::string &fn_name,
217 const Target &target);
218
219 /** Statically compile a pipeline to llvm bitcode, with the given
220 * filename (which should probably end in .bc), type signature,
221 * and C function name. If you're compiling a pipeline with a
222 * single output Func, see also Func::compile_to_bitcode. */
223 void compile_to_bitcode(const std::string &filename,
224 const std::vector<Argument> &args,
225 const std::string &fn_name,
226 const Target &target = get_target_from_environment());
227
228 /** Statically compile a pipeline to llvm assembly, with the given
229 * filename (which should probably end in .ll), type signature,
230 * and C function name. If you're compiling a pipeline with a
231 * single output Func, see also Func::compile_to_llvm_assembly. */
232 void compile_to_llvm_assembly(const std::string &filename,
233 const std::vector<Argument> &args,
234 const std::string &fn_name,
235 const Target &target = get_target_from_environment());
236
237 /** Statically compile a pipeline with multiple output functions to an
238 * object file, with the given filename (which should probably end in
239 * .o or .obj), type signature, and C function name (which defaults to
240 * the same name as this halide function. You probably don't want to
241 * use this directly; call compile_to_static_library or compile_to_file instead. */
242 void compile_to_object(const std::string &filename,
243 const std::vector<Argument> &,
244 const std::string &fn_name,
245 const Target &target = get_target_from_environment());
246
247 /** Emit a header file with the given filename for a pipeline. The
248 * header will define a function with the type signature given by
249 * the second argument, and a name given by the third. You don't
250 * actually have to have defined any of these functions yet to
251 * call this. You probably don't want to use this directly; call
252 * compile_to_static_library or compile_to_file instead. */
253 void compile_to_header(const std::string &filename,
254 const std::vector<Argument> &,
255 const std::string &fn_name,
256 const Target &target = get_target_from_environment());
257
258 /** Statically compile a pipeline to text assembly equivalent to
259 * the object file generated by compile_to_object. This is useful
260 * for checking what Halide is producing without having to
261 * disassemble anything, or if you need to feed the assembly into
262 * some custom toolchain to produce an object file. */
263 void compile_to_assembly(const std::string &filename,
264 const std::vector<Argument> &args,
265 const std::string &fn_name,
266 const Target &target = get_target_from_environment());
267
268 /** Statically compile a pipeline to C source code. This is useful
269 * for providing fallback code paths that will compile on many
270 * platforms. Vectorization will fail, and parallelization will
271 * produce serial code. */
272 void compile_to_c(const std::string &filename,
273 const std::vector<Argument> &,
274 const std::string &fn_name,
275 const Target &target = get_target_from_environment());
276
277 /** Write out an internal representation of lowered code. Useful
278 * for analyzing and debugging scheduling. Can emit html or plain
279 * text. */
280 void compile_to_lowered_stmt(const std::string &filename,
281 const std::vector<Argument> &args,
283 const Target &target = get_target_from_environment());
284
285 /** Write out the loop nests specified by the schedule for this
286 * Pipeline's Funcs. Helpful for understanding what a schedule is
287 * doing. */
289
290 /** Compile to object file and header pair, with the given
291 * arguments. */
292 void compile_to_file(const std::string &filename_prefix,
293 const std::vector<Argument> &args,
294 const std::string &fn_name,
295 const Target &target = get_target_from_environment());
296
297 /** Compile to static-library file and header pair, with the given
298 * arguments. */
299 void compile_to_static_library(const std::string &filename_prefix,
300 const std::vector<Argument> &args,
301 const std::string &fn_name,
302 const Target &target = get_target_from_environment());
303
304 /** Compile to static-library file and header pair once for each target;
305 * each resulting function will be considered (in order) via halide_can_use_target_features()
306 * at runtime, with the first appropriate match being selected for subsequent use.
307 * This is typically useful for specializations that may vary unpredictably by machine
308 * (e.g., SSE4.1/AVX/AVX2 on x86 desktop machines).
309 * All targets must have identical arch-os-bits.
310 */
311 void compile_to_multitarget_static_library(const std::string &filename_prefix,
312 const std::vector<Argument> &args,
313 const std::vector<Target> &targets);
314
315 /** Like compile_to_multitarget_static_library(), except that the object files
316 * are all output as object files (rather than bundled into a static library).
317 *
318 * `suffixes` is an optional list of strings to use for as the suffix for each object
319 * file. If nonempty, it must be the same length as `targets`. (If empty, Target::to_string()
320 * will be used for each suffix.)
321 *
322 * Note that if `targets.size()` > 1, the wrapper code (to select the subtarget)
323 * will be generated with the filename `${filename_prefix}_wrapper.o`
324 *
325 * Note that if `targets.size()` > 1 and `no_runtime` is not specified, the runtime
326 * will be generated with the filename `${filename_prefix}_runtime.o`
327 */
328 void compile_to_multitarget_object_files(const std::string &filename_prefix,
329 const std::vector<Argument> &args,
330 const std::vector<Target> &targets,
331 const std::vector<std::string> &suffixes);
332
333 /** Create an internal representation of lowered code as a self
334 * contained Module suitable for further compilation. */
335 Module compile_to_module(const std::vector<Argument> &args,
336 const std::string &fn_name,
337 const Target &target = get_target_from_environment(),
339
340 /** Eagerly jit compile the function to machine code. This
341 * normally happens on the first call to realize. If you're
342 * running your halide pipeline inside time-sensitive code and
343 * wish to avoid including the time taken to compile a pipeline,
344 * then you can call this ahead of time. Default is to use the Target
345 * returned from Halide::get_jit_target_from_environment()
346 */
348
349 /** Eagerly jit compile the function to machine code and return a callable
350 * struct that behaves like a function pointer. The calling convention
351 * will exactly match that of an AOT-compiled version of this Func
352 * with the same Argument list.
353 */
354 Callable compile_to_callable(const std::vector<Argument> &args,
355 const Target &target = get_jit_target_from_environment());
356
357 /** Install a set of external C functions or Funcs to satisfy
358 * dependencies introduced by HalideExtern and define_extern
359 * mechanisms. These will be used by calls to realize,
360 * infer_bounds, and compile_jit. */
361 void set_jit_externs(const std::map<std::string, JITExtern> &externs);
362
363 /** Return the map of previously installed externs. Is an empty
364 * map unless set otherwise. */
365 const std::map<std::string, JITExtern> &get_jit_externs();
366
367 /** Get a struct containing the currently set custom functions
368 * used by JIT. This can be mutated. Changes will take effect the
369 * next time this Pipeline is realized. */
371
372 /** Add a custom pass to be used during lowering. It is run after
373 * all other lowering passes. Can be used to verify properties of
374 * the lowered Stmt, instrument it with extra code, or otherwise
375 * modify it. The Func takes ownership of the pass, and will call
376 * delete on it when the Func goes out of scope. So don't pass a
377 * stack object, or share pass instances between multiple
378 * Funcs. */
379 template<typename T>
381 // Template instantiate a custom deleter for this type, then
382 // wrap in a lambda. The custom deleter lives in user code, so
383 // that deletion is on the same heap as construction (I hate Windows).
384 add_custom_lowering_pass(pass, [pass]() { delete_lowering_pass<T>(pass); });
385 }
386
387 /** Add a custom pass to be used during lowering, with the
388 * function that will be called to delete it also passed in. Set
389 * it to nullptr if you wish to retain ownership of the object. */
390 void add_custom_lowering_pass(Internal::IRMutator *pass, std::function<void()> deleter);
391
392 /** Remove all previously-set custom lowering passes */
394
395 /** Get the custom lowering passes. */
396 const std::vector<CustomLoweringPass> &custom_lowering_passes();
397
398 /** See Func::realize */
399 Realization realize(std::vector<int32_t> sizes = {}, const Target &target = Target());
400
401 /** Same as above, but takes a custom user-provided context to be
402 * passed to runtime functions. A nullptr context is legal, and is
403 * equivalent to calling the variant of realize that does not take
404 * a context. */
406 std::vector<int32_t> sizes = {},
407 const Target &target = Target());
408
409 /** Evaluate this Pipeline into an existing allocated buffer or
410 * buffers. If the buffer is also one of the arguments to the
411 * function, strange things may happen, as the pipeline isn't
412 * necessarily safe to run in-place. The realization should
413 * contain one Buffer per tuple component per output Func. For
414 * each individual output Func, all Buffers must have the same
415 * shape, but the shape can vary across the different output
416 * Funcs. This form of realize does *not* automatically copy data
417 * back from the GPU. */
418 void realize(RealizationArg output, const Target &target = Target());
419
420 /** Same as above, but takes a custom user-provided context to be
421 * passed to runtime functions. A nullptr context is legal, and
422 * is equivalent to calling the variant of realize that does not
423 * take a context. */
424 void realize(JITUserContext *context,
425 RealizationArg output,
426 const Target &target = Target());
427
428 /** For a given size of output, or a given set of output buffers,
429 * determine the bounds required of all unbound ImageParams
430 * referenced. Communicates the result by allocating new buffers
431 * of the appropriate size and binding them to the unbound
432 * ImageParams. */
433 // @{
434 void infer_input_bounds(const std::vector<int32_t> &sizes,
435 const Target &target = get_jit_target_from_environment());
437 const Target &target = get_jit_target_from_environment());
438 // @}
439
440 /** Variants of infer_inputs_bounds that take a custom user context */
441 // @{
443 const std::vector<int32_t> &sizes,
444 const Target &target = get_jit_target_from_environment());
446 RealizationArg output,
447 const Target &target = get_jit_target_from_environment());
448 // @}
449
450 /** Infer the arguments to the Pipeline, sorted into a canonical order:
451 * all buffers (sorted alphabetically by name), followed by all non-buffers
452 * (sorted alphabetically by name).
453 This lets you write things like:
454 \code
455 pipeline.compile_to_assembly("/dev/stdout", pipeline.infer_arguments());
456 \endcode
457 */
458 std::vector<Argument> infer_arguments();
459
460 /** Check if this pipeline object is defined. That is, does it
461 * have any outputs? */
462 bool defined() const;
463
464 /** Invalidate any internal cached state, e.g. because Funcs have
465 * been rescheduled. */
467
468 /** Add a top-level precondition to the generated pipeline,
469 * expressed as a boolean Expr. The Expr may depend on parameters
470 * only, and may not call any Func or use a Var. If the condition
471 * is not true at runtime, the pipeline will call halide_error
472 * with the remaining arguments, and return
473 * halide_error_code_requirement_failed. Requirements are checked
474 * in the order added. */
475 // @{
476 void add_requirement(const Expr &condition, const std::vector<Expr> &error_args);
477
478 template<typename... Args,
479 typename = typename std::enable_if<Internal::all_are_printable_args<Args...>::value>::type>
480 inline HALIDE_NO_USER_CODE_INLINE void add_requirement(const Expr &condition, Args &&...error_args) {
481 std::vector<Expr> collected_args;
482 Internal::collect_print_args(collected_args, std::forward<Args>(error_args)...);
483 add_requirement(condition, collected_args);
484 }
485 // @}
486
487 /** Generate begin_pipeline and end_pipeline tracing calls for this pipeline. */
489
490private:
491 std::string generate_function_name() const;
492};
493
495private:
496 Type ret_type_; // Only meaningful if is_void_return is false; must be default value otherwise
497 bool is_void_return_{false};
498 std::vector<Type> arg_types_;
499
500public:
501 ExternSignature() = default;
502
503 ExternSignature(const Type &ret_type, bool is_void_return, const std::vector<Type> &arg_types)
504 : ret_type_(ret_type),
505 is_void_return_(is_void_return),
506 arg_types_(arg_types) {
507 internal_assert(!(is_void_return && ret_type != Type()));
508 }
509
510 template<typename RT, typename... Args>
511 explicit ExternSignature(RT (*f)(Args... args))
512 : ret_type_(type_of<RT>()),
513 is_void_return_(std::is_void<RT>::value),
514 arg_types_({type_of<Args>()...}) {
515 }
516
517 const Type &ret_type() const {
518 internal_assert(!is_void_return());
519 return ret_type_;
520 }
521
522 bool is_void_return() const {
523 return is_void_return_;
524 }
525
526 const std::vector<Type> &arg_types() const {
527 return arg_types_;
528 }
529
530 friend std::ostream &operator<<(std::ostream &stream, const ExternSignature &sig) {
531 if (sig.is_void_return_) {
532 stream << "void";
533 } else {
534 stream << sig.ret_type_;
535 }
536 stream << " (*)(";
537 bool comma = false;
538 for (const auto &t : sig.arg_types_) {
539 if (comma) {
540 stream << ", ";
541 }
542 stream << t;
543 comma = true;
544 }
545 stream << ")";
546 return stream;
547 }
548};
549
551private:
552 void *address_{nullptr};
553 ExternSignature signature_;
554
555public:
556 ExternCFunction() = default;
557
559 : address_(address), signature_(signature) {
560 }
561
562 template<typename RT, typename... Args>
563 ExternCFunction(RT (*f)(Args... args))
564 : ExternCFunction((void *)f, ExternSignature(f)) {
565 }
566
567 void *address() const {
568 return address_;
569 }
570 const ExternSignature &signature() const {
571 return signature_;
572 }
573};
574
575struct JITExtern {
576private:
577 // Note that exactly one of pipeline_ and extern_c_function_
578 // can be set in a given JITExtern instance.
579 Pipeline pipeline_;
580 ExternCFunction extern_c_function_;
581
582public:
584 explicit JITExtern(const Func &func);
586
587 template<typename RT, typename... Args>
588 explicit JITExtern(RT (*f)(Args... args))
590 }
591
592 const Pipeline &pipeline() const {
593 return pipeline_;
594 }
596 return extern_c_function_;
597 }
598};
599
600} // namespace Halide
601
602#endif
#define internal_assert(c)
Definition Errors.h:19
Defines various operator overloads and utility functions that make it more pleasant to work with Hali...
Support classes for reference-counting via intrusive shared pointers.
Defines the struct representing lifetime and dependencies of a JIT compiled halide pipeline.
Defines Module, an IR container that fully describes a Halide program.
Defines Realization - a vector of Buffer for use in pipelines with multiple outputs.
Defines the structure that describes a Halide target.
Defines Tuple - the front-end handle on small arrays of expressions.
#define HALIDE_NO_USER_CODE_INLINE
Definition Util.h:46
A Halide::Buffer is a named shared reference to a Halide::Runtime::Buffer.
Definition Buffer.h:122
A halide function.
Definition Func.h:706
A base class for passes over the IR which modify it (e.g.
Definition IRMutator.h:26
A halide module.
Definition Module.h:142
A class representing a Halide pipeline.
Definition Pipeline.h:107
void compile_to_bitcode(const std::string &filename, const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment())
Statically compile a pipeline to llvm bitcode, with the given filename (which should probably end in ...
void compile_to_c(const std::string &filename, const std::vector< Argument > &, const std::string &fn_name, const Target &target=get_target_from_environment())
Statically compile a pipeline to C source code.
void compile_jit(const Target &target=get_jit_target_from_environment())
Eagerly jit compile the function to machine code.
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.
void compile_to_file(const std::string &filename_prefix, const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment())
Compile to object file and header pair, with the given arguments.
Realization realize(JITUserContext *context, std::vector< int32_t > sizes={}, const Target &target=Target())
Same as above, but takes a custom user-provided context to be passed to runtime functions.
void realize(JITUserContext *context, RealizationArg output, const Target &target=Target())
Same as above, but takes a custom user-provided context to be passed to runtime functions.
Func get_func(size_t index)
Return handle to the index-th Func within the pipeline based on the topological order.
void compile_to_header(const std::string &filename, const std::vector< Argument > &, const std::string &fn_name, const Target &target=get_target_from_environment())
Emit a header file with the given filename for a pipeline.
std::vector< Argument > infer_arguments()
Infer the arguments to the Pipeline, sorted into a canonical order: all buffers (sorted alphabeticall...
void infer_input_bounds(JITUserContext *context, const std::vector< int32_t > &sizes, const Target &target=get_jit_target_from_environment())
Variants of infer_inputs_bounds that take a custom user context.
void compile_to_lowered_stmt(const std::string &filename, const std::vector< Argument > &args, StmtOutputFormat fmt=Text, const Target &target=get_target_from_environment())
Write out an internal representation of lowered code.
const std::map< std::string, JITExtern > & get_jit_externs()
Return the map of previously installed externs.
static void add_autoscheduler(const std::string &autoscheduler_name, const AutoSchedulerFn &autoscheduler)
Add a new the autoscheduler method with the given name.
void set_jit_externs(const std::map< std::string, JITExtern > &externs)
Install a set of external C functions or Funcs to satisfy dependencies introduced by HalideExtern and...
void add_custom_lowering_pass(Internal::IRMutator *pass, std::function< void()> deleter)
Add a custom pass to be used during lowering, with the function that will be called to delete it also...
const std::vector< CustomLoweringPass > & custom_lowering_passes()
Get the custom lowering passes.
Pipeline()
Make an undefined Pipeline object.
void compile_to_llvm_assembly(const std::string &filename, const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment())
Statically compile a pipeline to llvm assembly, with the given filename (which should probably end in...
std::vector< Argument > infer_arguments(const Internal::Stmt &body)
Pipeline(const std::vector< Func > &outputs)
Make a pipeline that computes the givens Funcs as outputs.
Callable compile_to_callable(const std::vector< Argument > &args, const Target &target=get_jit_target_from_environment())
Eagerly jit compile the function to machine code and return a callable struct that behaves like a fun...
void infer_input_bounds(const std::vector< int32_t > &sizes, const Target &target=get_jit_target_from_environment())
For a given size of output, or a given set of output buffers, determine the bounds required of all un...
Pipeline(const std::vector< Func > &outputs, const std::vector< Internal::Stmt > &requirements)
Make a pipeline from deserialization.
void compile_to_multitarget_object_files(const std::string &filename_prefix, const std::vector< Argument > &args, const std::vector< Target > &targets, const std::vector< std::string > &suffixes)
Like compile_to_multitarget_static_library(), except that the object files are all output as object f...
void compile_to_multitarget_static_library(const std::string &filename_prefix, const std::vector< Argument > &args, const std::vector< Target > &targets)
Compile to static-library file and header pair once for each target; each resulting function will be ...
AutoSchedulerResults apply_autoscheduler(const Target &target, const AutoschedulerParams &autoscheduler_params) const
Generate a schedule for the pipeline using the specified autoscheduler.
void compile_to_object(const std::string &filename, const std::vector< Argument > &, const std::string &fn_name, const Target &target=get_target_from_environment())
Statically compile a pipeline with multiple output functions to an object file, with the given filena...
void invalidate_cache()
Invalidate any internal cached state, e.g.
void add_requirement(const Expr &condition, const std::vector< Expr > &error_args)
Add a top-level precondition to the generated pipeline, expressed as a boolean Expr.
std::vector< Func > outputs() const
Get the Funcs this pipeline outputs.
void infer_input_bounds(RealizationArg output, const Target &target=get_jit_target_from_environment())
void print_loop_nest()
Write out the loop nests specified by the schedule for this Pipeline's Funcs.
Module compile_to_module(const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment(), LinkageType linkage_type=LinkageType::ExternalPlusMetadata)
Create an internal representation of lowered code as a self contained Module suitable for further com...
std::vector< Internal::Stmt > requirements() const
Get the requirements of this pipeline.
HALIDE_NO_USER_CODE_INLINE void add_requirement(const Expr &condition, Args &&...error_args)
Definition Pipeline.h:480
void infer_input_bounds(JITUserContext *context, RealizationArg output, const Target &target=get_jit_target_from_environment())
void compile_to_assembly(const std::string &filename, const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment())
Statically compile a pipeline to text assembly equivalent to the object file generated by compile_to_...
JITHandlers & jit_handlers()
Get a struct containing the currently set custom functions used by JIT.
void realize(RealizationArg output, const Target &target=Target())
Evaluate this Pipeline into an existing allocated buffer or buffers.
void clear_custom_lowering_passes()
Remove all previously-set custom lowering passes.
bool defined() const
Check if this pipeline object is defined.
void compile_to_static_library(const std::string &filename_prefix, const std::vector< Argument > &args, const std::string &fn_name, const Target &target=get_target_from_environment())
Compile to static-library file and header pair, with the given arguments.
Pipeline(const Func &output)
Make a pipeline that computes the given Func.
void add_custom_lowering_pass(T *pass)
Add a custom pass to be used during lowering.
Definition Pipeline.h:380
void compile_to(const std::map< OutputFileType, std::string > &output_files, const std::vector< Argument > &args, const std::string &fn_name, const Target &target)
Compile and generate multiple target files with single call.
A Realization is a vector of references to existing Buffer objects.
Definition Realization.h:19
size_t size() const
The number of images in the Realization.
A templated Buffer class that wraps halide_buffer_t and adds functionality.
HALIDE_NO_USER_CODE_INLINE void collect_print_args(std::vector< Expr > &args)
Definition IROperator.h:335
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
LinkageType
Type of linkage a function in a lowered Halide module can have.
Definition Module.h:52
@ ExternalPlusMetadata
Visible externally. Argument metadata and an argv wrapper are also generated.
@ Internal
Not visible externally, similar to 'static' linkage in C.
Type type_of()
Construct the halide equivalent of a C type.
Definition Type.h:561
std::function< void(const Pipeline &, const Target &, const AutoschedulerParams &, AutoSchedulerResults *outputs)> AutoSchedulerFn
Definition Pipeline.h:103
Target get_jit_target_from_environment()
Return the target that Halide will use for jit-compilation.
Target get_target_from_environment()
Return the target that Halide will use.
StmtOutputFormat
Used to determine if the output printed to file should be as a normal string or as an HTML file which...
Definition Pipeline.h:72
@ HTML
Definition Pipeline.h:74
@ Text
Definition Pipeline.h:73
std::vector< uint8_t > featurization
Definition Pipeline.h:98
AutoschedulerParams autoscheduler_params
Definition Pipeline.h:96
Special the Autoscheduler to be used (if any), along with arbitrary additional arguments specific to ...
Definition Pipeline.h:48
AutoschedulerParams(const std::string &name, const std::map< std::string, std::string > &extra)
Definition Pipeline.h:56
AutoschedulerParams(const std::string &name)
Definition Pipeline.h:53
std::string to_string() const
std::map< std::string, std::string > extra
Definition Pipeline.h:50
A custom lowering pass.
Definition Pipeline.h:87
Internal::IRMutator * pass
Definition Pipeline.h:88
std::function< void()> deleter
Definition Pipeline.h:89
A fragment of Halide syntax.
Definition Expr.h:258
void * address() const
Definition Pipeline.h:567
ExternCFunction(void *address, const ExternSignature &signature)
Definition Pipeline.h:558
const ExternSignature & signature() const
Definition Pipeline.h:570
ExternCFunction(RT(*f)(Args... args))
Definition Pipeline.h:563
ExternSignature(const Type &ret_type, bool is_void_return, const std::vector< Type > &arg_types)
Definition Pipeline.h:503
friend std::ostream & operator<<(std::ostream &stream, const ExternSignature &sig)
Definition Pipeline.h:530
const Type & ret_type() const
Definition Pipeline.h:517
const std::vector< Type > & arg_types() const
Definition Pipeline.h:526
ExternSignature(RT(*f)(Args... args))
Definition Pipeline.h:511
bool is_void_return() const
Definition Pipeline.h:522
Intrusive shared pointers have a reference count (a RefCount object) stored in the class itself.
A reference-counted handle to a statement node.
Definition Expr.h:419
JITExtern(const Func &func)
const Pipeline & pipeline() const
Definition Pipeline.h:592
const ExternCFunction & extern_c_function() const
Definition Pipeline.h:595
JITExtern(Pipeline pipeline)
JITExtern(RT(*f)(Args... args))
Definition Pipeline.h:588
JITExtern(const ExternCFunction &extern_c_function)
A set of custom overrides of runtime functions.
Definition JITModule.h:35
A context to be passed to Pipeline::realize.
Definition JITModule.h:136
RealizationArg(Buffer< T, Dims > &a, Args &&...args)
Definition Pipeline.h:134
RealizationArg(halide_buffer_t *buf)
Definition Pipeline.h:121
HALIDE_NO_USER_CODE_INLINE RealizationArg(Buffer< T, Dims > &dst)
Definition Pipeline.h:129
RealizationArg(RealizationArg &&from)=default
RealizationArg(Runtime::Buffer< T, Dims > &dst)
Definition Pipeline.h:125
RealizationArg(Realization &&r)
Definition Pipeline.h:118
std::unique_ptr< std::vector< Buffer<> > > buffer_list
Definition Pipeline.h:113
A struct representing a target machine and os to generate code for.
Definition Target.h:19
Types in the halide type system.
Definition Type.h:276
The raw representation of an image passed around by generated Halide code.