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Fix a crasher bug in my constant folding rewrite
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11044 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -625,11 +625,18 @@ static Instruction::BinaryOps evaluateRelation(const Constant *V1,
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// If the first operand is simple, swap operands.
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assert((isa<ConstantPointerRef>(V2) || isa<ConstantExpr>(V2)) &&
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"Simple cases should have been handled by caller!");
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return SetCondInst::getSwappedCondition(evaluateRelation(V2, V1));
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Instruction::BinaryOps SwappedRelation = evaluateRelation(V2, V1);
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if (SwappedRelation != Instruction::BinaryOpsEnd)
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return SetCondInst::getSwappedCondition(SwappedRelation);
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} else if (const ConstantPointerRef *CPR1 = dyn_cast<ConstantPointerRef>(V1)){
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if (isa<ConstantExpr>(V2)) // Swap as necessary.
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return SetCondInst::getSwappedCondition(evaluateRelation(V2, V1));
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if (isa<ConstantExpr>(V2)) { // Swap as necessary.
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Instruction::BinaryOps SwappedRelation = evaluateRelation(V2, V1);
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if (SwappedRelation != Instruction::BinaryOpsEnd)
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return SetCondInst::getSwappedCondition(SwappedRelation);
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else
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return Instruction::BinaryOpsEnd;
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}
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// Now we know that the RHS is a ConstantPointerRef or simple constant,
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// which (since the types must match) means that it's a ConstantPointerNull.
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