change to global variable metadata to improve COMMON block debug user experience

Author: schweitzpgi

lib/AsmParser/LLParser.cpp

@@ -4726,7 +4726,7 @@ bool LLParser::ParseDITemplateValueParameter(MDNode *&Result, bool IsDistinct) {
 ///                         isDefinition: true, declaration: !3, align: 8)
 bool LLParser::ParseDIGlobalVariable(MDNode *&Result, bool IsDistinct) {
 #define VISIT_MD_FIELDS(OPTIONAL, REQUIRED)                                    \
-  REQUIRED(name, MDStringField, (/* AllowEmpty */ false));                     \
+  REQUIRED(name, MDStringField, (/* AllowEmpty */ true));                     \
   OPTIONAL(scope, MDField, );                                                  \
   OPTIONAL(linkageName, MDStringField, );                                      \
   OPTIONAL(file, MDField, );                                                   \

lib/IR/Verifier.cpp

@@ -1244,7 +1244,7 @@ void Verifier::visitDIGlobalVariable(const DIGlobalVariable &N) {
   visitDIVariable(N);
 
   AssertDI(N.getTag() == dwarf::DW_TAG_variable, "invalid tag", &N);
-  AssertDI(!N.getName().empty(), "missing global variable name", &N);
+  //AssertDI(!N.getName().empty(), "missing global variable name", &N);
   AssertDI(isType(N.getRawType()), "invalid type ref", &N, N.getRawType());
   AssertDI(N.getType(), "missing global variable type", &N);
   if (auto *Member = N.getRawStaticDataMemberDeclaration()) {