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Fix PR1487 and Transforms/IndVar/2007-06-06-DeleteDanglesPtr.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37459 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1196,9 +1196,28 @@ namespace {
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/// client before it removes an instruction from the program, to make sure
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/// that no dangling references are left around.
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void ScalarEvolutionsImpl::deleteInstructionFromRecords(Instruction *I) {
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Scalars.erase(I);
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if (PHINode *PN = dyn_cast<PHINode>(I))
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ConstantEvolutionLoopExitValue.erase(PN);
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SmallVector<Instruction *, 16> Worklist;
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if (Scalars.erase(I)) {
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if (PHINode *PN = dyn_cast<PHINode>(I))
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ConstantEvolutionLoopExitValue.erase(PN);
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Worklist.push_back(I);
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}
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while (!Worklist.empty()) {
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Instruction *II = Worklist.back();
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Worklist.pop_back();
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for (Instruction::use_iterator UI = II->use_begin(), UE = II->use_end();
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UI != UE; ++UI) {
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Instruction *Inst = dyn_cast<Instruction>(*UI);
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if (Inst && hasSCEV(Inst) && Scalars.erase(Inst)) {
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if (PHINode *PN = dyn_cast<PHINode>(II))
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ConstantEvolutionLoopExitValue.erase(PN);
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Worklist.push_back(Inst);
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}
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}
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}
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}
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