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Re-commit 141203, but much more conservative.
Just pull the instruction name, but don't change the order of anything else. That keeps --debug happy and non-crashing, but doesn't change how the worklist gets built. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141210 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2017,13 +2017,13 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
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// Everything uses the new instruction now.
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I->replaceAllUsesWith(Result);
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// Move the name to the new instruction first.
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Result->takeName(I);
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// Push the new instruction and any users onto the worklist.
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Worklist.Add(Result);
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Worklist.AddUsersToWorkList(*Result);
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// Move the name to the new instruction first.
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Result->takeName(I);
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// Insert the new instruction into the basic block...
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BasicBlock *InstParent = I->getParent();
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BasicBlock::iterator InsertPos = I;
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