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Constant::IsThreadDependent(): Use dyn_cast<Constant> instead of cast

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It turns out that the operands of a Constant are not always themselves
Constant. For example, one of the operands of BlockAddress is
BasicBlock, which is not a Constant.

This should fix the dragonegg-x86_64-linux-gcc-4.6-test build which
broke in r168037.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168147 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hans Wennborg
2012-11-16 10:33:25 +00:00
parent 63a450a313
commit fbeb956876
2 changed files with 23 additions and 1 deletions
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4
lib/VMCore/Constants.cpp
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@@ -261,7 +261,9 @@ bool Constant::isThreadDependent() const {
}
for (unsigned I = 0, E = C->getNumOperands(); I != E; ++I) {
const Constant *D = cast<Constant>(C->getOperand(I));
const Constant *D = dyn_cast<Constant>(C->getOperand(I));
if (!D)
continue;
if (Visited.insert(D))
WorkList.push_back(D);
}