Halide 22.0.0 Halide compiler and libraries

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PartitionLoops.h
Go to the documentation of this file.
1#ifndef PARTITION_LOOPS_H
2#define PARTITION_LOOPS_H
3
4/** \file
5 * Defines a lowering pass that partitions loop bodies into three
6 * to handle boundary conditions: A prologue, a simplified
7 * steady-stage, and an epilogue.
8 */
9
10#include "Expr.h"
11#include "Scope.h"
12
13 namespace Halide {
14 namespace Internal {
15
16/** Return true if an expression uses a likely tag that isn't captured by an
17 * enclosing Select, Min, or Max. The scope contains all vars that should be
18 * considered to have uncaptured likelies. */
19 bool has_uncaptured_likely_tag(const Expr &e, const Scope<> &scope);
20
21/** Return true if an expression uses a likely tag. The scope contains all vars
22 * in scope that should be considered to have likely tags. */
23 bool has_likely_tag(const Expr &e, const Scope<> &scope);
24
25/** Partitions loop bodies into a prologue, a steady state, and an
26 * epilogue. Finds the steady state by hunting for use of clamped
27 * ramps, or the 'likely' intrinsic. */
28 Stmt partition_loops(Stmt s);
29
30} // namespace Internal
31} // namespace Halide
32
33#endif
Expr.h
Base classes for Halide expressions (Halide::Expr) and statements (Halide::Internal::Stmt)
Scope.h
Defines the Scope class, which is used for keeping track of names in a scope while traversing IR.
Halide::Internal::Scope
A common pattern when traversing Halide IR is that you need to keep track of stuff when you find a Le...
Definition Scope.h:94
Halide::Internal::has_likely_tag
bool has_likely_tag(const Expr &e, const Scope<> &scope)
Return true if an expression uses a likely tag.
Halide::Internal::partition_loops
Stmt partition_loops(Stmt s)
Partitions loop bodies into a prologue, a steady state, and an epilogue.
Halide::Internal::has_uncaptured_likely_tag
bool has_uncaptured_likely_tag(const Expr &e, const Scope<> &scope)
Return true if an expression uses a likely tag that isn't captured by an enclosing Select,...
Halide
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
Definition AbstractGenerator.h:19
Halide::LinkageType::Internal
@ Internal
Not visible externally, similar to 'static' linkage in C.
Halide::cast
Internal::ConstantInterval cast(Type t, const Internal::ConstantInterval &a)
Cast operators for ConstantIntervals.
Halide::Expr
A fragment of Halide syntax.
Definition Expr.h:258
Halide::Internal::Stmt
A reference-counted handle to a statement node.
Definition Expr.h:427