Example my assembly with gcc -02 flag Before:  After:  -- v5: d3dcompiler_43: micro-optimization using strstr -> strchr implementation if possible wusa: micro-optimization using strstr -> strchr implementation if possible oledb32: micro-optimization using strstr -> strchr implementation if possible wbemprox: micro-optimization using strstr -> strchr implementation if possible oledb32: micro-optimization using strstr -> strchr implementation if possible wusa: micro-optimization using strstr -> strchr implementation if possible msidb: micro-optimization using strstr -> strchr implementation if possible https://gitlab.winehq.org/wine/wine/-/merge_requests/6158