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Fix a bug compimling Ruby, fixing this testcase:

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LowerSetJmp/2005-05-05-OldUses.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21696 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-05-05 15:47:43 +00:00
parent ac0630ff75
commit 3987abdfe3
1 changed files with 11 additions and 3 deletions
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14
lib/Transforms/IPO/LowerSetJmp.cpp
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@ -272,9 +272,17 @@ void LowerSetJmp::TransformLongJmpCall(CallInst* Inst)
else
new UnwindInst(Inst);
// Remove all insts after the branch/unwind inst.
Inst->getParent()->getInstList().erase(Inst,
Inst->getParent()->getInstList().end());
// Remove all insts after the branch/unwind inst. Go from back to front to
// avoid replaceAllUsesWith if possible.
BasicBlock *BB = Inst->getParent();
Instruction *Removed;
do {
Removed = &BB->back();
// If the removed instructions have any users, replace them now.
if (!Removed->use_empty())
Removed->replaceAllUsesWith(UndefValue::get(Removed->getType()));
Removed->eraseFromParent();
} while (Removed != Inst);
++LongJmpsTransformed;
}