2 files changed, 33 insertions, 1 deletions

diff --git a/meta/recipes-devtools/rust/rust-llvm.inc b/meta/recipes-devtools/rust/rust-llvm.inc
index 0f8fb785b7..5c2ccdac9a 100644
--- a/meta/recipes-devtools/rust/rust-llvm.inc
+++ b/meta/recipes-devtools/rust/rust-llvm.inc
@@ -2,7 +2,8 @@ SUMMARY = "LLVM compiler framework (packaged with rust)"
 LICENSE ?= "Apache-2.0-with-LLVM-exception"
 HOMEPAGE = "http://www.rust-lang.org"
 
-SRC_URI += "file://0002-llvm-allow-env-override-of-exe-path.patch;striplevel=2"
+SRC_URI += "file://0002-llvm-allow-env-override-of-exe-path.patch;striplevel=2 \
+            file://0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch;striplevel=2"
 
 S = "${RUSTSRC}/src/llvm-project/llvm"
 
diff --git a/meta/recipes-devtools/rust/rust-llvm/0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch b/meta/recipes-devtools/rust/rust-llvm/0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch
new file mode 100644
index 0000000000..48af6fc283
--- /dev/null
+++ b/meta/recipes-devtools/rust/rust-llvm/0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch
@@ -0,0 +1,31 @@
+From 86940d87026432683fb6741cd8a34d3b9b18e40d 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 ccf0959389b..1f801e83b7d 100644
+--- a/llvm/utils/TableGen/AsmMatcherEmitter.cpp
++++ b/llvm/utils/TableGen/AsmMatcherEmitter.cpp
+@@ -359,7 +359,10 @@ 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;
+   }
+ };
+