[r16-645 Regression] FAIL: gcc.target/i386/vect-epilogues-5.c scan-tree-dump-times vect "loop vectorized using 64 byte vectors" 2 on Linux/x86_64

"haochen.jiang via Gcc-regression" <[email protected]>
Newsgroups gmane.comp.gcc.regression,gmane.comp.gcc.patches
Message-ID <[email protected]>
On Linux/x86_64,

af7b84d0d02ffa23e4843e9555a888c9e80bd9b5 is the first bad commit
commit af7b84d0d02ffa23e4843e9555a888c9e80bd9b5
Author: Richard Biener <[email protected]>
Date:   Wed May 14 16:45:08 2025 +0200

    Enhance -fopt-info-vec vectorized loop diagnostic

caused

FAIL: gcc.target/i386/vect-epilogues-4.c scan-tree-dump-times vect "loop vectorized using 64 byte vectors" 2
FAIL: gcc.target/i386/vect-epilogues-5.c scan-tree-dump-times vect "loop vectorized using 64 byte vectors" 2

with GCC configured with

../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r16-645/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/vect-epilogues-4.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-4.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-4.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-4.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-5.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-5.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-5.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/vect-epilogues-5.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.)
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