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Extend the AliasAnalysis::pointsToConstantMemory interface to allow it

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to optionally look for constant or local (alloca) memory.

Teach BasicAliasAnalysis::pointsToConstantMemory to look through Select
and Phi nodes, and to support looking for local memory.

Remove FunctionAttrs' PointsToLocalOrConstantMemory function, now that
AliasAnalysis knows all the tricks that it knew.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118412 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-11-08 16:45:26 +00:00
parent c80cbf2540
commit a25e5dbcc2
9 changed files with 85 additions and 83 deletions
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5
lib/Analysis/AliasAnalysis.cpp
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@ -49,9 +49,10 @@ AliasAnalysis::alias(const Location &LocA, const Location &LocB) {
return AA->alias(LocA, LocB);
}
bool AliasAnalysis::pointsToConstantMemory(const Location &Loc) {
bool AliasAnalysis::pointsToConstantMemory(const Location &Loc,
bool OrLocal) {
assert(AA && "AA didn't call InitializeAliasAnalysis in its run method!");
return AA->pointsToConstantMemory(Loc);
return AA->pointsToConstantMemory(Loc, OrLocal);
}
void AliasAnalysis::deleteValue(Value *V) {