From 3b30a9bda88374e8f03bf96e972aee5bd214b98b Mon Sep 17 00:00:00 2001
From: Alexander Kanavin <alex.kanavin@gmail.com>
Date: Fri, 27 Nov 2020 10:11:08 +0000
Subject: [PATCH] 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 <alex.kanavin@gmail.com>
---
 llvm/utils/TableGen/AsmMatcherEmitter.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/llvm/utils/TableGen/AsmMatcherEmitter.cpp b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
index 73724e662f9e..1ca9c73415db 100644
--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
@@ -361,7 +361,10 @@ public:
     // 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;
   }
 };
 
