Halide 19.0.0
Halide compiler and libraries
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Monotonic.h
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1#ifndef HALIDE_MONOTONIC_H
2#define HALIDE_MONOTONIC_H
3
4/** \file
5 *
6 * Methods for computing whether expressions are monotonic
7 */
8#include <iostream>
9#include <string>
10
11#include "ConstantInterval.h"
12#include "Scope.h"
13
14namespace Halide {
15namespace Internal {
16
17/** Find the bounds of the derivative of an expression. The scope gives the
18 * bounds on the derivatives of any variables found. */
19ConstantInterval derivative_bounds(const Expr &e, const std::string &var,
21
22/**
23 * Detect whether an expression is monotonic increasing in a variable,
24 * decreasing, or unknown.
25 */
26enum class Monotonic { Constant,
29 Unknown };
30Monotonic is_monotonic(const Expr &e, const std::string &var,
32Monotonic is_monotonic(const Expr &e, const std::string &var, const Scope<Monotonic> &scope);
33
34/** Emit the monotonic class in human-readable form for debugging. */
35std::ostream &operator<<(std::ostream &stream, const Monotonic &m);
36
38
39} // namespace Internal
40} // namespace Halide
41
42#endif
Defines the ConstantInterval class, and operators on it.
Defines the Scope class, which is used for keeping track of names in a scope while traversing IR.
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
ConstantInterval derivative_bounds(const Expr &e, const std::string &var, const Scope< ConstantInterval > &scope=Scope< ConstantInterval >::empty_scope())
Find the bounds of the derivative of an expression.
Monotonic is_monotonic(const Expr &e, const std::string &var, const Scope< ConstantInterval > &scope=Scope< ConstantInterval >::empty_scope())
Monotonic
Detect whether an expression is monotonic increasing in a variable, decreasing, or unknown.
Definition Monotonic.h:26
ConstantInterval operator<<(const ConstantInterval &a, const ConstantInterval &b)
void is_monotonic_test()
This file defines the class FunctionDAG, which is our representation of a Halide pipeline,...
@ Internal
Not visible externally, similar to 'static' linkage in C.
A fragment of Halide syntax.
Definition Expr.h:258
A class to represent ranges of integers.