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Reject duplicate case values in a switch, PR5450.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86846 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -780,9 +780,13 @@ void Verifier::visitSwitchInst(SwitchInst &SI) {
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// Check to make sure that all of the constants in the switch instruction
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// have the same type as the switched-on value.
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const Type *SwitchTy = SI.getCondition()->getType();
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for (unsigned i = 1, e = SI.getNumCases(); i != e; ++i)
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SmallPtrSet<ConstantInt*, 32> Constants;
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for (unsigned i = 1, e = SI.getNumCases(); i != e; ++i) {
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Assert1(SI.getCaseValue(i)->getType() == SwitchTy,
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"Switch constants must all be same type as switch value!", &SI);
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Assert2(Constants.insert(SI.getCaseValue(i)),
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"Duplicate integer as switch case", &SI, SI.getCaseValue(i));
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}
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visitTerminatorInst(SI);
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}
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