--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/g++.dg/lto/odr-3_1.C	Thu Feb 13 11:34:05 2020 +0900
@@ -0,0 +1,16 @@
+typedef struct YYSTYPE { // { dg-lto-message "type" 2 }
+   // We get two notes here:
+   // note: a different type is defined in another translation unit
+   // note: a type with different number of fields is defined in another translation unit
+} YYSTYPE;
+union yyalloc { // { dg-lto-message "type" 2 }
+   // We get here three notes:
+   // note: a different type is defined in another translation unit
+   // note: type 'union yyalloc' itself violates the C++ One Definition Rule
+  short yyss;
+  YYSTYPE yyvs; // { dg-lto-message "field of same name but different type is defined in another translation unit" }
+
+}; 
+
+yyalloc a;  // { dg-lto-message "'a' was previously declared here" }
+