On Linux/x86_64,
bb4fbc0b2d3aed25114ac076b878b9eb82ea6712 is the first bad commit
commit bb4fbc0b2d3aed25114ac076b878b9eb82ea6712
Author: Hongyu Wang <[email protected]>
Date: Fri Jan 9 16:34:55 2026 +0800
[APX] i386: Fix illegal broadcast instruction generated by intrinsic
caused
FAIL: gcc.target/i386/avx2-vbroadcastsi128-1.c scan-assembler-times
vbroadcasti128[ \\t]+[^\n]*%ymm[0-9]+ 2
FAIL: gcc.target/i386/vlddqu_vinserti128.c scan-assembler-times vbroadcasti128 1
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-6987/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="i386.exp=gcc.target/i386/avx2-vbroadcastsi128-1.c
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=gcc.target/i386/avx2-vbroadcastsi128-1.c
--target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=gcc.target/i386/vlddqu_vinserti128.c
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="i386.exp=gcc.target/i386/vlddqu_vinserti128.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.)
