From d0e72c19fa878645afd3d2f573a2587b02e26d47 Mon Sep 17 00:00:00 2001
From: Gahtan Nahdi <155860115+gahtan-syarif@users.noreply.github.com>
Date: Mon, 15 Apr 2024 11:55:28 +0700
Subject: [PATCH] fix clang compiler warning for avx512 build

Initialize variable in constexpr function to get rid of clang compiler warning for avx512 build.

closes https://github.com/official-stockfish/Stockfish/pull/5176

Non-functional change
---
 src/nnue/nnue_feature_transformer.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/nnue/nnue_feature_transformer.h b/src/nnue/nnue_feature_transformer.h
index 3101c8d2..0a0f4217 100644
--- a/src/nnue/nnue_feature_transformer.h
+++ b/src/nnue/nnue_feature_transformer.h
@@ -229,8 +229,7 @@ class FeatureTransformer {
 
     static constexpr void order_packs([[maybe_unused]] uint64_t* v) {
 #if defined(USE_AVX512)  // _mm512_packs_epi16 ordering
-        uint64_t tmp0, tmp1;
-        tmp0 = v[2], tmp1 = v[3];
+        uint64_t tmp0 = v[2], tmp1 = v[3];
         v[2] = v[8], v[3] = v[9];
         v[8] = v[4], v[9] = v[5];
         v[4] = tmp0, v[5] = tmp1;
@@ -246,8 +245,7 @@ class FeatureTransformer {
 
     static constexpr void inverse_order_packs([[maybe_unused]] uint64_t* v) {
 #if defined(USE_AVX512)  // Inverse _mm512_packs_epi16 ordering
-        uint64_t tmp0, tmp1;
-        tmp0 = v[2], tmp1 = v[3];
+        uint64_t tmp0 = v[2], tmp1 = v[3];
         v[2] = v[4], v[3] = v[5];
         v[4] = v[8], v[5] = v[9];
         v[8] = tmp0, v[9] = tmp1;