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* add some DEBUG statements
* Properly compile this: struct a {}; int test() { struct a b[2]; if (&b[0] != &b[1]) abort (); return 0; } to 'return 0', not abort(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19875 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2198,14 +2198,17 @@ Instruction *InstCombiner::FoldGEPSetCC(User *GEPLHS, Value *RHS,
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// index is zero or not.
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if (Cond == Instruction::SetEQ || Cond == Instruction::SetNE) {
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Instruction *InVal = 0;
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for (unsigned i = 1, e = GEPLHS->getNumOperands(); i != e; ++i) {
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gep_type_iterator GTI = gep_type_begin(GEPLHS);
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for (unsigned i = 1, e = GEPLHS->getNumOperands(); i != e; ++i, ++GTI) {
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bool EmitIt = true;
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if (Constant *C = dyn_cast<Constant>(GEPLHS->getOperand(i))) {
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if (isa<UndefValue>(C)) // undef index -> undef.
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return ReplaceInstUsesWith(I, UndefValue::get(I.getType()));
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if (C->isNullValue())
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EmitIt = false;
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else if (isa<ConstantInt>(C))
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else if (TD->getTypeSize(GTI.getIndexedType()) == 0) {
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EmitIt = false; // This is indexing into a zero sized array?
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} else if (isa<ConstantInt>(C))
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return ReplaceInstUsesWith(I, // No comparison is needed here.
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ConstantBool::get(Cond == Instruction::SetNE));
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}
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@ -4902,7 +4905,9 @@ bool InstCombiner::runOnFunction(Function &F) {
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AddUsesToWorkList(*I);
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++NumDeadInst;
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I->getParent()->getInstList().erase(I);
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DEBUG(std::cerr << "IC: DCE: " << *I);
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I->eraseFromParent();
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removeFromWorkList(I);
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continue;
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}
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@ -4929,6 +4934,8 @@ bool InstCombiner::runOnFunction(Function &F) {
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}
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}
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DEBUG(std::cerr << "IC: ConstFold to: " << *C << " from: " << *I);
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// Add operands to the worklist...
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AddUsesToWorkList(*I);
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ReplaceInstUsesWith(*I, C);
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