On Linux/x86_64,
96bc77e45c202303b87647a44206c6475f996c5c is the first bad commit
commit 96bc77e45c202303b87647a44206c6475f996c5c
Author: Richard Biener <[email protected]>
Date: Wed Jan 14 10:53:05 2026 +0100
tree-optimization/123190 - allow VF == 1 epilog vectorization
caused
FAIL: gcc.dg/vect/fast-math-slp-38.c -flto -ffat-lto-objects
scan-tree-dump-times vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/fast-math-slp-38.c scan-tree-dump-times vect "vectorizing
stmts using SLP" 1
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-6766/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="vect.exp=gcc.dg/vect/fast-math-slp-38.c
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="vect.exp=gcc.dg/vect/fast-math-slp-38.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.)
