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Teach AliasSetTracker about VAArgInst.

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llvm-svn: 49674
This commit is contained in:
Dan Gohman 2008-04-14 18:34:50 +00:00
parent 3e7d0f3882
commit 14dce3e51c
2 changed files with 20 additions and 0 deletions
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3
include/llvm/Analysis/AliasSetTracker.h
View File

@ -29,6 +29,7 @@ class AliasAnalysis;
class LoadInst;
class StoreInst;
class FreeInst;
class VAArgInst;
class AliasSetTracker;
class AliasSet;
@ -281,6 +282,7 @@ public:
bool add(LoadInst *LI);
bool add(StoreInst *SI);
bool add(FreeInst *FI);
bool add(VAArgInst *VAAI);
bool add(CallSite CS); // Call/Invoke instructions
bool add(CallInst *CI) { return add(CallSite(CI)); }
bool add(InvokeInst *II) { return add(CallSite(II)); }
@ -295,6 +297,7 @@ public:
bool remove(LoadInst *LI);
bool remove(StoreInst *SI);
bool remove(FreeInst *FI);
bool remove(VAArgInst *VAAI);
bool remove(CallSite CS);
bool remove(CallInst *CI) { return remove(CallSite(CI)); }
bool remove(InvokeInst *II) { return remove(CallSite(II)); }

17
lib/Analysis/AliasSetTracker.cpp
View File

@ -292,6 +292,12 @@ bool AliasSetTracker::add(FreeInst *FI) {
return NewPtr;
}
bool AliasSetTracker::add(VAArgInst *VAAI) {
bool NewPtr;
addPointer(VAAI->getOperand(0), ~0, AliasSet::ModRef, NewPtr);
return NewPtr;
}
bool AliasSetTracker::add(CallSite CS) {
if (AA.doesNotAccessMemory(CS))
@ -321,6 +327,8 @@ bool AliasSetTracker::add(Instruction *I) {
return add(II);
else if (FreeInst *FI = dyn_cast<FreeInst>(I))
return add(FI);
else if (VAArgInst *VAAI = dyn_cast<VAArgInst>(I))
return add(VAAI);
return true;
}
@ -414,6 +422,13 @@ bool AliasSetTracker::remove(FreeInst *FI) {
return true;
}
bool AliasSetTracker::remove(VAArgInst *VAAI) {
AliasSet *AS = findAliasSetForPointer(VAAI->getOperand(0), ~0);
if (!AS) return false;
remove(*AS);
return true;
}
bool AliasSetTracker::remove(CallSite CS) {
if (AA.doesNotAccessMemory(CS))
return false; // doesn't alias anything
@ -434,6 +449,8 @@ bool AliasSetTracker::remove(Instruction *I) {
return remove(CI);
else if (FreeInst *FI = dyn_cast<FreeInst>(I))
return remove(FI);
else if (VAArgInst *VAAI = dyn_cast<VAArgInst>(I))
return remove(VAAI);
return true;
}