bug 122:

- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass
- Remove tabs
- Fix coments refering to ConstantPointerRef


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14937 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AsmParser/llvmAsmParser.y

@@ -79,7 +79,7 @@ static struct PerModuleInfo {
   // GlobalRefs - This maintains a mapping between <Type, ValID>'s and forward
   // references to global values.  Global values may be referenced before they
   // are defined, and if so, the temporary object that they represent is held
-  // here.  This is used for forward references of ConstantPointerRefs.
+  // here.  This is used for forward references of GlobalValues.
   //
   typedef std::map<std::pair<const PointerType *,
                              ValID>, GlobalValue*> GlobalRefsType;
@@ -1195,7 +1195,7 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
       ThrowException("Global const reference must be a pointer type!");
 
     // ConstExprs can exist in the body of a function, thus creating
-    // ConstantPointerRefs whenever they refer to a variable.  Because we are in
+    // GlobalValues whenever they refer to a variable.  Because we are in
     // the context of a function, getValNonImprovising will search the functions
     // symbol table instead of the module symbol table for the global symbol,
     // which throws things all off.  To get around this, we just tell
@@ -1245,8 +1245,7 @@ ConstVal: Types '[' ConstVector ']' { // Nonempty unsized arr
       }
     }
 
-    GlobalValue *GV = cast<GlobalValue>(V);
-    $$ = ConstantPointerRef::get(GV);
+    $$ = cast<GlobalValue>(V);
     delete $1;            // Free the type handle
   }
   | Types ConstExpr {