From c13c1d2c30b3b2f9068f1a3b7c239e2264f329e0 Mon Sep 17 00:00:00 2001
From: Disservin <disservin.social@gmail.com>
Date: Thu, 22 May 2025 18:41:53 +0200
Subject: [PATCH] Silence "may be used uninitialized" GCC 15 warning

closes https://github.com/official-stockfish/Stockfish/pull/6083

No functional change
---
 src/nnue/nnue_accumulator.cpp | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/nnue/nnue_accumulator.cpp b/src/nnue/nnue_accumulator.cpp
index 83128436..83b09637 100644
--- a/src/nnue/nnue_accumulator.cpp
+++ b/src/nnue/nnue_accumulator.cpp
@@ -33,12 +33,16 @@
 namespace Stockfish::Eval::NNUE {
 
 #if defined(__GNUC__) && !defined(__clang__)
-    #define sf_assume(cond) \
-        do \
-        { \
-            if (!(cond)) \
-                __builtin_unreachable(); \
-        } while (0)
+    #if __GNUC__ >= 13
+        #define sf_assume(cond) __attribute__((assume(cond)))
+    #else
+        #define sf_assume(cond) \
+            do \
+            { \
+                if (!(cond)) \
+                    __builtin_unreachable(); \
+            } while (0)
+    #endif
 #else
     // do nothing for other compilers
     #define sf_assume(cond)