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Fix a stale pointer issue that caused 300.twolf to fail to build on zion

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last night.

llvm-svn: 28916
This commit is contained in:
Chris Lattner 2006-06-26 19:20:48 +00:00
parent 70a5120be9
commit e2d4b2f3e2
1 changed files with 11 additions and 0 deletions
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11
lib/Analysis/AliasSetTracker.cpp
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@ -435,6 +435,17 @@ void AliasSetTracker::deleteValue(Value *PtrVal) {
// Notify the alias analysis implementation that this value is gone.
AA.deleteValue(PtrVal);
// If this is a call instruction, remove the callsite from the appropriate
// AliasSet.
CallSite CS = CallSite::get(PtrVal);
if (CS.getInstruction()) {
Function *F = CS.getCalledFunction();
if (!F || !AA.doesNotAccessMemory(F)) {
if (AliasSet *AS = findAliasSetForCallSite(CS))
AS->removeCallSite(CS);
}
}
// First, look up the PointerRec for this pointer.
hash_map<Value*, AliasSet::PointerRec>::iterator I = PointerMap.find(PtrVal);
if (I == PointerMap.end()) return; // Noop