AsmMatcherEmitter: sort ClassInfo lists by name as well

Otherwise, there are instances which are identical in
every other field and therefore sort non-reproducibly
(which breaks binary and source reproducibiliy).

Upstream-Status: Submitted [https://reviews.llvm.org/D97477]
Signed-off-by: Alexander Kanavin <[email protected]>

Author: kanavin

llvm/utils/TableGen/AsmMatcherEmitter.cpp

@@ -384,7 +384,10 @@ struct ClassInfo {
     // name of a class shouldn't be significant. However, some of the backends
     // accidentally rely on this behaviour, so it will have to stay like this
     // until they are fixed.
-    return ValueName < RHS.ValueName;
+    if (ValueName != RHS.ValueName)
+        return ValueName < RHS.ValueName;
+    // All else being equal, we should sort by name, for source and binary reproducibility
+    return Name < RHS.Name;
   }
 };