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Commit 44487 broke bootstrap of llvm-gcc-4.2. It is

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not yet clear why, but in the meantime work around the
problem by making less use of readnone/readonly info.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44626 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-12-05 21:03:28 +00:00
parent 8c24e74b02
commit 5d84afdc83
2 changed files with 15 additions and 4 deletions
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lib/Analysis/AliasAnalysis.cpp
+12 -4
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@@ -116,13 +116,17 @@ AliasAnalysis::getModRefInfo(StoreInst *S, Value *P, unsigned Size) {
AliasAnalysis::ModRefBehavior
AliasAnalysis::getModRefBehavior(CallSite CS,
std::vector<PointerAccessInfo> *Info) {
if (CS.doesNotAccessMemory())
if (CS.doesNotAccessMemory() &&
// FIXME: workaround gcc bootstrap breakage
CS.getCalledFunction() && CS.getCalledFunction()->isDeclaration())
// Can't do better than this.
return DoesNotAccessMemory;
ModRefBehavior MRB = UnknownModRefBehavior;
if (Function *F = CS.getCalledFunction())
MRB = getModRefBehavior(F, CS, Info);
if (MRB != DoesNotAccessMemory && CS.onlyReadsMemory())
if (MRB != DoesNotAccessMemory && CS.onlyReadsMemory() &&
// FIXME: workaround gcc bootstrap breakage
CS.getCalledFunction() && CS.getCalledFunction()->isDeclaration())
return OnlyReadsMemory;
return MRB;
}
@@ -130,11 +134,15 @@ AliasAnalysis::getModRefBehavior(CallSite CS,
AliasAnalysis::ModRefBehavior
AliasAnalysis::getModRefBehavior(Function *F,
std::vector<PointerAccessInfo> *Info) {
if (F->doesNotAccessMemory())
if (F->doesNotAccessMemory() &&
// FIXME: workaround gcc bootstrap breakage
F->isDeclaration())
// Can't do better than this.
return DoesNotAccessMemory;
ModRefBehavior MRB = getModRefBehavior(F, CallSite(), Info);
if (MRB != DoesNotAccessMemory && F->onlyReadsMemory())
if (MRB != DoesNotAccessMemory && F->onlyReadsMemory() &&
// FIXME: workaround gcc bootstrap breakage
F->isDeclaration())
return OnlyReadsMemory;
return MRB;
}