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Reland r223754

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The commit is identical except a reference to `GV' should have been to
`GVal'.

llvm-svn: 223756
This commit is contained in:
David Majnemer 2014-12-09 05:56:09 +00:00
parent a165fae214
commit db0e82a418
2 changed files with 13 additions and 6 deletions
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15
lib/AsmParser/LLParser.cpp
View File

@ -787,33 +787,36 @@ bool LLParser::ParseGlobal(const std::string &Name, LocTy NameLoc,
if (Ty->isFunctionTy() || Ty->isLabelTy())
return Error(TyLoc, "invalid type for global variable");
GlobalVariable *GV = nullptr;
GlobalValue *GVal = nullptr;
// See if the global was forward referenced, if so, use the global.
if (!Name.empty()) {
if (GlobalValue *GVal = M->getNamedValue(Name)) {
GVal = M->getNamedValue(Name);
if (GVal) {
if (!ForwardRefVals.erase(Name) || !isa<GlobalValue>(GVal))
return Error(NameLoc, "redefinition of global '@" + Name + "'");
GV = cast<GlobalVariable>(GVal);
}
} else {
std::map<unsigned, std::pair<GlobalValue*, LocTy> >::iterator
I = ForwardRefValIDs.find(NumberedVals.size());
if (I != ForwardRefValIDs.end()) {
GV = cast<GlobalVariable>(I->second.first);
GVal = I->second.first;
ForwardRefValIDs.erase(I);
}
}
if (!GV) {
GlobalVariable *GV;
if (!GVal) {
GV = new GlobalVariable(*M, Ty, false, GlobalValue::ExternalLinkage, nullptr,
Name, nullptr, GlobalVariable::NotThreadLocal,
AddrSpace);
} else {
if (GV->getType()->getElementType() != Ty)
if (GVal->getType()->getElementType() != Ty)
return Error(TyLoc,
"forward reference and definition of global have different types");
GV = cast<GlobalVariable>(GVal);
// Move the forward-reference to the correct spot in the module.
M->getGlobalList().splice(M->global_end(), M->getGlobalList(), GV);
}

4
test/Assembler/invalid-fwdref2.ll Normal file
View File

@ -0,0 +1,4 @@
; RUN: not llvm-as %s -disable-output 2>&1 | grep "forward reference and definition of global have different types"
@a2 = alias void ()* @g2
@g2 = internal global i8 42