From 90c1123d1c9f02c0c2036053dcf9ad6b35e848da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Wed, 17 Sep 2025 00:23:48 +0200
Subject: [PATCH] std.mem: work around LoongArch inline asm bug in
 doNotOptimizeAway()

https://github.com/llvm/llvm-project/issues/159200
---
 lib/std/mem.zig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/std/mem.zig b/lib/std/mem.zig
index 0b0967a566..6a5e654fab 100644
--- a/lib/std/mem.zig
+++ b/lib/std/mem.zig
@@ -4485,7 +4485,8 @@ pub fn doNotOptimizeAway(val: anytype) void {
             } else doNotOptimizeAway(&val);
         },
         .float => {
-            if ((t.float.bits == 32 or t.float.bits == 64) and builtin.zig_backend != .stage2_c) {
+            // https://github.com/llvm/llvm-project/issues/159200
+            if ((t.float.bits == 32 or t.float.bits == 64) and builtin.zig_backend != .stage2_c and !builtin.cpu.arch.isLoongArch()) {
                 asm volatile (""
                     :
                     : [_] "rm" (val),