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Intrinsics don't touch internal global variables

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(unless passed one via a parameter), even if they
are IntrWriteMem.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56115 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-09-11 19:35:55 +00:00
parent bcb37fd22f
commit 892b84007c
1 changed files with 4 additions and 2 deletions
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6
lib/Analysis/IPA/GlobalsModRef.cpp
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@ -392,8 +392,10 @@ void GlobalsModRef::AnalyzeCallGraph(CallGraph &CG, Module &M) {
FR.GlobalInfo[*GI] |= Ref;
}
} else {
// Can't say anything useful.
KnowNothing = true;
FunctionEffect |= ModRef;
// Can't say anything useful unless it's an intrinsic - they don't
// read or write global variables of the kind considered here.
KnowNothing = !F->isIntrinsic();
}
continue;
}