On Linux/x86_64,
7b4849ec79873fa6de98436deda47e19cbac32ef is the first bad commit
commit 7b4849ec79873fa6de98436deda47e19cbac32ef
Author: Andrew Pinski <[email protected]>
Date: Mon Feb 24 12:33:32 2025 -0800
gimple-fold: Improve optimize_memcpy_to_memset by walking back until
aliasing says the ref is a may clobber. [PR118947]
caused
FAIL: gcc.dg/pr118947-1.c scan-tree-dump-times forwprop1 "after previous" 1
with GCC configured with
../../gcc/configure
--prefix=/export/users/haochenj/src/gcc-bisect/master/master/r16-23/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/pr118947-1.c
--target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr118947-1.c
--target_board='unix{-m64\ -march=cascadelake}'"
(Please do not reply to this email, for question about this report, contact me
at haochen dot jiang at intel.com.)
(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.)
