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TBAA: try to fix the dragonegg bots.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191585 91177308-0d34-0410-b5e6-96231b3b80d8
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Manman Ren 2013-09-27 22:59:21 +00:00
parent 0b15e9893d
commit e5f32cf320
1 changed files with 3 additions and 1 deletions
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4
lib/Analysis/TypeBasedAliasAnalysis.cpp
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@ -326,7 +326,9 @@ TypeBasedAliasAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
/// it as struct-path aware TBAA format, otherwise, we treat it as scalar TBAA
/// format.
static bool isStructPathTBAA(const MDNode *MD) {
return isa<MDNode>(MD->getOperand(0));
// Anonymous TBAA root starts with a MDNode and dragonegg uses it as
// a TBAA tag.
return isa<MDNode>(MD->getOperand(0)) && MD->getNumOperands() >= 3;
}
/// Aliases - Test whether the type represented by A may alias the