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Give ScalarEvolution access to the DominatorTree. It'll need this

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to make more intellegent AddRec folding decisions.

llvm-svn: 93930
This commit is contained in:
Dan Gohman 2010-01-19 22:21:27 +00:00
parent 1b0d0247b2
commit 273322a12b
2 changed files with 6 additions and 0 deletions
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4
include/llvm/Analysis/ScalarEvolution.h
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@ -181,6 +181,10 @@ namespace llvm {
///
TargetData *TD;
/// DT - The dominator tree.
///
DominatorTree *DT;
/// CouldNotCompute - This SCEV is used to represent unknown trip
/// counts and things.
SCEVCouldNotCompute CouldNotCompute;

2
lib/Analysis/ScalarEvolution.cpp
View File

@ -5167,6 +5167,7 @@ ScalarEvolution::ScalarEvolution()
bool ScalarEvolution::runOnFunction(Function &F) {
this->F = &F;
LI = &getAnalysis<LoopInfo>();
DT = &getAnalysis<DominatorTree>();
TD = getAnalysisIfAvailable<TargetData>();
return false;
}
@ -5183,6 +5184,7 @@ void ScalarEvolution::releaseMemory() {
void ScalarEvolution::getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequiredTransitive<LoopInfo>();
AU.addRequiredTransitive<DominatorTree>();
}
bool ScalarEvolution::hasLoopInvariantBackedgeTakenCount(const Loop *L) {