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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@712 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -456,6 +456,12 @@ static bool setValueName(Value *V, char *NameStr) {
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// cerr << "Type: " << Ty->getDescription() << " != "
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// << cast<const Type>(V)->getDescription() << "!\n";
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} else if (GlobalVariable *EGV = dyn_cast<GlobalVariable>(Existing)) {
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// We are allowed to redefine a global variable in two circumstances:
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// 1. If at least one of the globals is uninitialized or
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// 2. If both initializers have the same value.
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//
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// This can only be done if the const'ness of the vars is the same.
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//
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if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
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if (EGV->isConstant() == GV->isConstant() &&
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(!EGV->hasInitializer() || !GV->hasInitializer() ||
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