Revision 6f5dc6bec58bf0a6305113166bfdcfeb80af3c5f authored by Steven Johnson on 07 December 2020, 19:27:17 UTC, committed by Steven Johnson on 07 December 2020, 19:27:17 UTC
Currently, it can contain garbage after parsing
1 parent 4f554a7
ApplySplit.h
#ifndef APPLY_SPLIT_H
#define APPLY_SPLIT_H
/** \file
*
* Defines method that returns a list of let stmts, substitutions, and
* predicates to be added given a split schedule.
*/
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "Expr.h"
#include "Schedule.h"
namespace Halide {
namespace Internal {
struct ApplySplitResult {
// If type is "Substitution", then this represents a substitution of
// variable "name" to value. If type is "LetStmt", we should insert a new
// let stmt defining "name" with value "value". If type is "Predicate", we
// should ignore "name" and the predicate is "value".
std::string name;
Expr value;
enum Type { Substitution = 0,
LetStmt,
Predicate };
Type type;
ApplySplitResult(const std::string &n, Expr val, Type t)
: name(n), value(std::move(val)), type(t) {
}
ApplySplitResult(Expr val)
: name(""), value(std::move(val)), type(Predicate) {
}
bool is_substitution() const {
return (type == Substitution);
}
bool is_let() const {
return (type == LetStmt);
}
bool is_predicate() const {
return (type == Predicate);
}
};
/** Given a Split schedule on a definition (init or update), return a list of
* of predicates on the definition, substitutions that needs to be applied to
* the definition (in ascending order of application), and let stmts which
* defined the values of variables referred by the predicates and substitutions
* (ordered from innermost to outermost let). */
std::vector<ApplySplitResult> apply_split(
const Split &split, bool is_update, const std::string &prefix,
std::map<std::string, Expr> &dim_extent_alignment);
/** Compute the loop bounds of the new dimensions resulting from applying the
* split schedules using the loop bounds of the old dimensions. */
std::vector<std::pair<std::string, Expr>> compute_loop_bounds_after_split(
const Split &split, const std::string &prefix);
} // namespace Internal
} // namespace Halide
#endif
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