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The two-callsite form of AliasAnalysis::getModRefInfo is documented

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to return Ref if the left callsite only reads memory read or written
by the right callsite; fix BasicAliasAnalysis to implement this.

Add AliasAnalysisEvaluator support for testing the two-callsite
form of getModRefInfo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110270 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-08-04 22:56:29 +00:00
parent abf7bdffd6
commit 3dcc91ee8c
4 changed files with 50 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Analysis/AliasAnalysisEvaluator.cpp
+32
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@@ -107,6 +107,15 @@ PrintModRefResults(const char *Msg, bool P, Instruction *I, Value *Ptr,
}
}
static inline void
PrintModRefResults(const char *Msg, bool P, CallSite CSA, CallSite CSB,
Module *M) {
if (P) {
errs() << " " << Msg << ": " << *CSA.getInstruction()
<< " <-> " << *CSB.getInstruction() << '\n';
}
}
static inline bool isInterestingPointer(Value *V) {
return V->getType()->isPointerTy()
&& !isa<ConstantPointerNull>(V);
@@ -209,6 +218,29 @@ bool AAEval::runOnFunction(Function &F) {
}
}
// Mod/ref alias analysis: compare all pairs of calls
for (SetVector<CallSite>::iterator C = CallSites.begin(),
Ce = CallSites.end(); C != Ce; ++C) {
for (SetVector<CallSite>::iterator D = CallSites.begin(); D != Ce; ++D) {
if (D == C)
continue;
switch (AA.getModRefInfo(*C, *D)) {
case AliasAnalysis::NoModRef:
PrintModRefResults("NoModRef", PrintNoModRef, *C, *D, F.getParent());
++NoModRef; break;
case AliasAnalysis::Mod:
PrintModRefResults(" Mod", PrintMod, *C, *D, F.getParent());
++Mod; break;
case AliasAnalysis::Ref:
PrintModRefResults(" Ref", PrintRef, *C, *D, F.getParent());
++Ref; break;
case AliasAnalysis::ModRef:
PrintModRefResults(" ModRef", PrintModRef, *C, *D, F.getParent());
++ModRef; break;
}
}
}
return false;
}