From 2d453939161d5bdd3d45128858935e38e0bac48e Mon Sep 17 00:00:00 2001
From: LLVM Packaging Team <pkg-llvm-team@lists.alioth.debian.org>
Date: Fri, 18 Sep 2020 10:47:25 +0100
Subject: [PATCH] mips-force-nomadd4

The MIPS port aims to support the Loongson 3 family of CPUs in addition
of the other MIPS CPUs. On the Loongson 3 family the MADD4 instructions
are fused, while they are not fused on the other MIPS CPUs. In order to
support both, we have to disabled those instructions.

For that, the patch below basically corresponds to the --with-madd4=no
used on the GCC side.


Gbp-Pq: Name mips-force-nomadd4.diff
---
 clang/lib/Basic/Targets/Mips.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index 11e9ac914..c666eea7d 100644
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -306,6 +306,7 @@ public:
     FloatABI = HardFloat;
     DspRev = NoDSP;
     HasFP64 = isFP64Default();
+    DisableMadd4 = true;
 
     for (const auto &Feature : Features) {
       if (Feature == "+single-float")
-- 
2.30.2