pre-release fix: sign mismatch

PiperOrigin-RevId: 779093465

Author: jan-wassenberg

hwy/ops/x86_128-inl.h

@@ -7171,8 +7171,8 @@ HWY_API Vec128<T, N> TableLookupLanes(Vec128<T, N> v, Indices128<T, N> idx) {
   Store(v_full, d_full, src_lanes);
   Store(vidx, di_full, indices);
 
-  for (int i = 0; i < N; i++) {
-    result_lanes[i] = src_lanes[indices[i] & 3u];
+  for (size_t i = 0; i < N; i++) {
+    result_lanes[i] = src_lanes[static_cast<size_t>(indices[i] & 3)];
   }
   return Load(d, result_lanes);
 #endif  // HWY_COMPILER_GCC_ACTUAL && HWY_HAS_BUILTIN(__builtin_shuffle)

run_tests.sh

@@ -14,9 +14,9 @@ cmake .. -DHWY_WARNINGS_ARE_ERRORS:BOOL=ON -DCMAKE_BUILD_TYPE=Release
 make -j && ctest -j && cd .. && rm -rf build
 
 #######################################
-echo DEBUG Clang 13
+echo DEBUG Clang 15
 rm -rf build_dbg && mkdir build_dbg && cd build_dbg
-CXX=clang++-13 CC=clang-13 cmake .. -DHWY_WARNINGS_ARE_ERRORS:BOOL=ON -DCMAKE_BUILD_TYPE=Debug
+CXX=clang++-15 CC=clang-15 cmake .. -DHWY_WARNINGS_ARE_ERRORS:BOOL=ON -DCMAKE_BUILD_TYPE=Debug
 make -j && ctest -j && cd .. && rm -rf build_dbg
 
 #######################################