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Potential bug in RewriteLoopBodyWithConditionConstant: use iterator should not be changed inside the uses enumeration loop.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145432 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Stepan Dyatkovskiy 2011-11-29 20:34:39 +00:00
parent fe2cb3e37f
commit be4c844648
1 changed files with 5 additions and 1 deletions
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6
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -907,9 +907,13 @@ void LoopUnswitch::RewriteLoopBodyWithConditionConstant(Loop *L, Value *LIC,
Instruction *U = dyn_cast<Instruction>(*UI);
if (!U || !L->contains(U))
continue;
U->replaceUsesOfWith(LIC, Replacement);
Worklist.push_back(U);
}
for (std::vector<Instruction*>::iterator UI = Worklist.begin();
UI != Worklist.end(); ++UI)
(*UI)->replaceUsesOfWith(LIC, Replacement);
SimplifyCode(Worklist, L);
return;
}