Merge pull request #66 from schweitzpgi/release_70

fixes a bug with COMMON blocks when both debug and optimizations are on

Author: sscalpone

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 */ true));                     \
+  OPTIONAL(name, MDStringField, (/* AllowEmpty */ true));                     \
   OPTIONAL(scope, MDField, );                                                  \
   OPTIONAL(linkageName, MDStringField, );                                      \
   OPTIONAL(file, MDField, );                                                   \