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Allow global address space forward decls using IDs in .ll files.

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Summary:
This fixes bugzilla bug 24656. Fixes the case where there is a forward
reference to a global variable using an ID (i.e. @0). It does this by
passing the address space of the initializer pointer for which the
forward referenced global is used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246788 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Karl Schimpf 2015-09-03 18:06:44 +00:00
parent 3610c9fe55
commit b80c5f51a4
2 changed files with 22 additions and 16 deletions
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29
lib/AsmParser/LLParser.cpp
View File

@ -1040,6 +1040,17 @@ bool LLParser::ParseFnAttributeValuePairs(AttrBuilder &B,
// GlobalValue Reference/Resolution Routines. // GlobalValue Reference/Resolution Routines.
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
static inline GlobalValue *createGlobalFwdRef(Module *M, PointerType *PTy,
const std::string &Name) {
if (auto *FT = dyn_cast<FunctionType>(PTy->getElementType()))
return Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
else
return new GlobalVariable(*M, PTy->getElementType(), false,
GlobalValue::ExternalWeakLinkage, nullptr, Name,
nullptr, GlobalVariable::NotThreadLocal,
PTy->getAddressSpace());
}
/// GetGlobalVal - Get a value with the specified name or ID, creating a /// GetGlobalVal - Get a value with the specified name or ID, creating a
/// forward reference record if needed. This can return null if the value /// forward reference record if needed. This can return null if the value
/// exists but does not have the right type. /// exists but does not have the right type.
@ -1073,15 +1084,7 @@ GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty,
} }
// Otherwise, create a new forward reference for this value and remember it. // Otherwise, create a new forward reference for this value and remember it.
GlobalValue *FwdVal; GlobalValue *FwdVal = createGlobalFwdRef(M, PTy, Name);
if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType()))
FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
else
FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
GlobalValue::ExternalWeakLinkage, nullptr, Name,
nullptr, GlobalVariable::NotThreadLocal,
PTy->getAddressSpace());
ForwardRefVals[Name] = std::make_pair(FwdVal, Loc); ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
return FwdVal; return FwdVal;
} }
@ -1113,13 +1116,7 @@ GlobalValue *LLParser::GetGlobalVal(unsigned ID, Type *Ty, LocTy Loc) {
} }
// Otherwise, create a new forward reference for this value and remember it. // Otherwise, create a new forward reference for this value and remember it.
GlobalValue *FwdVal; GlobalValue *FwdVal = createGlobalFwdRef(M, PTy, "");
if (FunctionType *FT = dyn_cast<FunctionType>(PTy->getElementType()))
FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, "", M);
else
FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
GlobalValue::ExternalWeakLinkage, nullptr, "");
ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc); ForwardRefValIDs[ID] = std::make_pair(FwdVal, Loc);
return FwdVal; return FwdVal;
} }

9
test/Assembler/global-addrspace-forwardref.ll
View File

@ -7,3 +7,12 @@
; CHECK: @a = addrspace(1) global i8 0 ; CHECK: @a = addrspace(1) global i8 0
@a2 = global i8 addrspace(1)* @a @a2 = global i8 addrspace(1)* @a
@a = addrspace(1) global i8 0 @a = addrspace(1) global i8 0
; Now test with global IDs instead of global names.
; CHECK: @a3 = global i8 addrspace(1)* @0
; CHECK: @0 = addrspace(1) global i8 0
@a3 = global i8 addrspace(1)* @0
@0 = addrspace(1) global i8 0