ack, I am looking this
Haochen Jiang <[email protected]> 於 2026年5月19日週二 下午4:30寫道： > > On Linux/x86_64, > > 7034f85fb6577ac48693f0606b7e33fef41a1b74 is the first bad commit > commit 7034f85fb6577ac48693f0606b7e33fef41a1b74 > Author: Kito Cheng <[email protected]> > Date: Fri Nov 28 17:58:21 2025 +0800 > > middle-end: Optimize reversed CRC table-based implementation > > caused > > FAIL: gcc.dg/crc-builtin-rev-target32.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_16_polynomial_0x1021" > FAIL: gcc.dg/crc-builtin-rev-target32.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_32_polynomial_0x4002123" > FAIL: gcc.dg/crc-builtin-rev-target32.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_8_polynomial_0x12" > FAIL: gcc.dg/crc-builtin-rev-target64.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_16_polynomial_0x1021" > FAIL: gcc.dg/crc-builtin-rev-target64.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_32_polynomial_0x4002123" > FAIL: gcc.dg/crc-builtin-rev-target64.c scan-rtl-dump expand ";; (?:using > optab for|emitting crc table) crc_8_polynomial_0x12" > > with GCC configured with > > ../../gcc/configure > --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r17-567/usr > --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld > --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl > --enable-libmpx x86_64-linux --disable-bootstrap > > To reproduce: > > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target32.c > --target_board='unix{-m32}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target32.c > --target_board='unix{-m32\ -march=cascadelake}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target32.c > --target_board='unix{-m64}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target32.c > --target_board='unix{-m64\ -march=cascadelake}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target64.c > --target_board='unix{-m64}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="dg.exp=gcc.dg/crc-builtin-rev-target64.c > --target_board='unix{-m64\ -march=cascadelake}'" > > (Please directly reply to this email for question about this report.) > (If you met problems with cascadelake related, disabling AVX512F in command > line might save that.) > (However, please make sure that there is no potential problems with AVX512.)
