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Add AssertingVH which makes PR7647 break consistently.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108401 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman 2010-07-15 04:46:14 +00:00
parent 4baa8ebc93
commit 3ed60a2a22
1 changed files with 3 additions and 1 deletions
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4
lib/Analysis/InstructionSimplify.cpp
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@ -443,7 +443,9 @@ void llvm::ReplaceAndSimplifyAllUses(Instruction *From, Value *To,
// FromHandle - This keeps a weakvh on the from value so that we can know if
// it gets deleted out from under us in a recursive simplification.
WeakVH FromHandle(From);
// Double-check that To isn't deleted.
AssertingVH<> CheckedTo = To;
while (!From->use_empty()) {
// Update the instruction to use the new value.
Use &U = From->use_begin().getUse();