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IslAst: Expose run-time check generation as individual function 

This allows to construct run-time checks for a scop without having to generate
a full AST. This is currently not taken advantage of in Polly itself, but
external users may benefit from this feature.

llvm-svn: 262009
This commit is contained in:
Tobias Grosser 2016-02-26 12:59:38 +00:00
parent 470734b512
commit 64ca00c344
2 changed files with 16 additions and 4 deletions
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11
polly/include/polly/CodeGen/IslAst.h
View File

@ -56,6 +56,15 @@ public:
/// @brief Get the run-time conditions for the Scop.
__isl_give isl_ast_expr *getRunCondition();
/// @brief Build run-time condition for scop.
///
/// @param S The scop to build the condition for.
/// @param Build The isl_build object to use to build the condition.
///
/// @returns An ast expression that describes the necessary run-time check.
static isl_ast_expr *buildRunCondition(Scop *S,
__isl_keep isl_ast_build *Build);
private:
Scop *S;
isl_ast_node *Root;
@ -64,8 +73,6 @@ private:
IslAst(Scop *Scop);
void init(const Dependences &D);
void buildRunCondition(__isl_keep isl_ast_build *Build);
};
class IslAstInfo : public ScopPass {

9
polly/lib/CodeGen/IslAst.cpp
View File

@ -329,7 +329,10 @@ buildCondition(__isl_keep isl_ast_build *Build, const Scop::MinMaxAccessTy *It0,
return NonAliasGroup;
}
void IslAst::buildRunCondition(__isl_keep isl_ast_build *Build) {
__isl_give isl_ast_expr *
IslAst::buildRunCondition(Scop *S, __isl_keep isl_ast_build *Build) {
isl_ast_expr *RunCondition;
// The conditions that need to be checked at run-time for this scop are
// available as an isl_set in the runtime check context from which we can
// directly derive a run-time condition.
@ -355,6 +358,8 @@ void IslAst::buildRunCondition(__isl_keep isl_ast_build *Build) {
RunCondition, buildCondition(Build, RWAccIt0, &ROAccIt));
}
}
return RunCondition;
}
/// @brief Simple cost analysis for a given SCoP
@ -418,7 +423,7 @@ void IslAst::init(const Dependences &D) {
&BuildInfo);
}
buildRunCondition(Build);
RunCondition = buildRunCondition(S, Build);
Root = isl_ast_build_node_from_schedule(Build, S->getScheduleTree());