[r14-5759 Regression] FAIL: gcc.dg/Wstringop-overflow-17.c (test for warnings, line 9) on Linux/x86_64

[r14-5759 Regression] FAIL: gcc.dg/Wstringop-overflow-17.c (test for warnings, line 9) on Linux/x86_64

[haochen.jiang]

On Linux/x86_64,

6bf66276e3e41d5d92f7b7260e98b6a111653805 is the first bad commit
commit 6bf66276e3e41d5d92f7b7260e98b6a111653805
Author: Richard Biener <rguenther@suse.de>
Date:   Wed Nov 22 11:10:41 2023 +0100

    tree-optimization/112344 - wrong final value replacement

caused

FAIL: gcc.dg/vect/no-scevccp-noreassoc-outer-4.c scan-tree-dump-times vect "OUTER LOOP VECTORIZED." 1
FAIL: gcc.dg/Wstringop-overflow-17.c  (test for warnings, line 16)
FAIL: gcc.dg/Wstringop-overflow-17.c  (test for warnings, line 9)

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-5759/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/no-scevccp-noreassoc-outer-4.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/no-scevccp-noreassoc-outer-4.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/no-scevccp-noreassoc-outer-4.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/no-scevccp-noreassoc-outer-4.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-17.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-17.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-17.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-17.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.)