Re: [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
Avinash Jayakar via Gcc-regression <[email protected]>
| Newsgroups | gmane.comp.gcc.regression,gmane.comp.gcc.patches |
|---|---|
| Message-ID | <[email protected]> |
On Tue, 2025-10-21 at 02:22 +0000, Jiang, Haochen wrote: > 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.) Looks like an extra loop is also vectorized, I will disable optimization for all those loops and send a patch. aarch64 also has similar failure: https://linaro.atlassian.net/browse/GNU-1707 Thanks, Avinash