[r14-7139 Regression] FAIL: gcc.dg/pr15784-1.c scan-tree-dump-times gimple "ABS_EXPR" 0 on Linux/x86_64

[r14-7139 Regression] FAIL: gcc.dg/pr15784-1.c scan-tree-dump-times gimple "ABS_EXPR" 0 on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

897b95a12b7fe549ec2cb8ef3a3f0e4fbabf9737 is the first bad commit
commit 897b95a12b7fe549ec2cb8ef3a3f0e4fbabf9737
Author: Richard Biener <rguenther@suse.de>
Date:   Thu Jan 11 12:02:43 2024 +0100

    tree-optimization/113126 - vector extension compare optimization

caused

FAIL: gcc.dg/pr15784-1.c scan-tree-dump-times gimple "ABS_EXPR" 0

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-7139/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/pr15784-1.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr15784-1.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr15784-1.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/pr15784-1.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.)