Preserve address space of forward-referenced global variables in the LL parser

Before, the parser would assert on the following code:

@a2 = global i8 addrspace(1)* @a
@a = addrspace(1) global i8 0

because the type of @a was "i8*" instead of "i8 addrspace(1)*" when parsing
the initializer for @a2.

llvm-svn: 168197

llvm/lib/AsmParser/LLParser.cpp

@@ -779,7 +779,9 @@ GlobalValue *LLParser::GetGlobalVal(const std::string &Name, Type *Ty,
     FwdVal = Function::Create(FT, GlobalValue::ExternalWeakLinkage, Name, M);
   else
     FwdVal = new GlobalVariable(*M, PTy->getElementType(), false,
-                                GlobalValue::ExternalWeakLinkage, 0, Name);
+                                GlobalValue::ExternalWeakLinkage, 0, Name,
+                                0, GlobalVariable::NotThreadLocal,
+                                PTy->getAddressSpace());
 
   ForwardRefVals[Name] = std::make_pair(FwdVal, Loc);
   return FwdVal;

llvm/test/Assembler/global-addrspace-forwardref.ll

@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+
+; Make sure the address space of forward decls is preserved
+
+; CHECK: @a2 = global i8 addrspace(1)* @a
+; CHECK: @a = addrspace(1) global i8 0
+@a2 = global i8 addrspace(1)* @a
+@a = addrspace(1) global i8 0