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llvm.global_[cd]tor is defined to be either external, or appending with an array

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of { i32, void ()* }. Teach the verifier to verify that, deleting copies of
checks strewn about.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129128 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2011-04-08 07:30:21 +00:00
parent dd099e1e55
commit 2c44a80d99
4 changed files with 32 additions and 36 deletions
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17
lib/VMCore/Verifier.cpp
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@@ -471,6 +471,23 @@ void Verifier::visitGlobalVariable(GlobalVariable &GV) {
"invalid linkage type for global declaration", &GV);
}
if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
GV.getName() == "llvm.global_dtors")) {
Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
"invalid linkage for intrinsic global variable", &GV);
// Don't worry about emitting an error for it not being an array,
// visitGlobalValue will complain on appending non-array.
if (const ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
const StructType *STy = dyn_cast<StructType>(ATy->getElementType());
const PointerType *FuncPtrTy =
FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
Assert1(STy && STy->getNumElements() == 2 &&
STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
STy->getTypeAtIndex(1) == FuncPtrTy,
"wrong type for intrinsic global variable", &GV);
}
}
visitGlobalValue(GV);
}