[r16-4464 Regression] FAIL: gcc.dg/vect/pr104116-round-umod-2.c scan-tree-dump-times vect "optimized: loop vectorized" 1 on Linux/x86_64

"Jiang, Haochen via Gcc-regression" <[email protected]>
Newsgroups gmane.comp.gcc.regression,gmane.comp.gcc.patches
Message-ID <SJ5PPF77D28E3C2B0AA7EAE6868DFF00640ECF2A@SJ5PPF77D28E3C2.namprd11.prod.outlook.com>
On Linux/x86_64,

6883d51304f1aa852da3f2b4eb26bdf2e12bbcb9 is the first bad commit
commit 6883d51304f1aa852da3f2b4eb26bdf2e12bbcb9
Author: Avinash Jayakar <[email protected]>
Date:   Fri Oct 17 12:38:59 2025 +0530

    vect: Add pattern recognition for vectorizing {FLOOR,CEIL,ROUND}_{MOD, DIV}_EXPR

caused

FAIL: gcc.dg/vect/pr104116-ceil-umod-2.c -flto -ffat-lto-objects  scan-tree-dump-times vect "optimized: loop vectorized" 1
FAIL: gcc.dg/vect/pr104116-ceil-umod-2.c scan-tree-dump-times vect "optimized: loop vectorized" 1
FAIL: gcc.dg/vect/pr104116-ceil-umod-pow2.c -flto -ffat-lto-objects  scan-tree-dump-times vect "optimized: loop vectorized" 1
FAIL: gcc.dg/vect/pr104116-ceil-umod-pow2.c scan-tree-dump-times vect "optimized: loop vectorized" 1
FAIL: gcc.dg/vect/pr104116-round-umod-2.c -flto -ffat-lto-objects  scan-tree-dump-times vect "optimized: loop vectorized" 1
FAIL: gcc.dg/vect/pr104116-round-umod-2.c scan-tree-dump-times vect "optimized: loop vectorized" 1

with GCC configured with

../../gcc/configure --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-4464/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/pr104116-ceil-umod-2.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr104116-ceil-umod-2.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr104116-ceil-umod-pow2.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr104116-ceil-umod-pow2.c --target_board='unix{-m64\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr104116-round-umod-2.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="vect.exp=gcc.dg/vect/pr104116-round-umod-2.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.)
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