From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id C73EC385AC22; Tue, 9 Aug 2022 14:02:02 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C73EC385AC22 From: "malat at debian dot org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106322] [12/13 Regression] tree-vectorize: Wrong code at O2 level (-fno-tree-vectorize is working) since r12-2404-ga1d27560770818c5 Date: Tue, 09 Aug 2022 14:01:38 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 12.1.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: malat at debian dot org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: linkw at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.2 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Aug 2022 14:02:02 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322 --- Comment #35 from Mathieu Malaterre --- (In reply to Mathieu Malaterre from comment #33) > (In reply to Kewen Lin from comment #32) > > (In reply to Mathieu Malaterre from comment #30) > > > (In reply to Martin Li=C5=A1ka from comment #29) > > > > (In reply to Kewen Lin from comment #28) > > > > > Sorry for the breakage, I'll have a look tomorrow. > > > > >=20 > > > > > btw, is it able to reproduce the issue on ppc64 (or ppc64le) as w= ell? > > > >=20 > > > > No for gcc112 machine (ppc64le). Seems to be related to 32-bit targ= ets. > > >=20 > > > I could see unit-test failures of highway on most 32bits arch, as wel= l as > > > mips64el and ppc64be. > >=20 > > Thanks to both guys! I'll try with ppc64 32bit first. >=20 > Watch out that I've reduced the original test case on my local x86/32bits > arch. >=20 > It appears that I've lifted way too much code to reproduce the issue on > ppc32/be. Is is ok for you to use instead, reproducer from previous comme= nt: >=20 > * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322#c16 Nevermind; I was using gcc-11. I can reproduce the issue on ppc32/be using the (somewhat) reduced example: * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106322#c19 For reference: % g++ -O2 -fno-tree-vectorize *.cc && ./a.out && echo "ok" ok But: % g++ --verbose -O2 *.cc && ./a.out && echo "ok" Using built-in specs. COLLECT_GCC=3Dg++ COLLECT_LTO_WRAPPER=3D/usr/lib/gcc/powerpc-linux-gnu/12/lto-wrapper Target: powerpc-linux-gnu Configured with: ../src/configure -v --with-pkgversion=3D'Debian 12.1.0-7' --with-bugurl=3Dfile:///usr/share/doc/gcc-12/README.Bugs --enable-languages=3Dc,ada,c++,go,d,fortran,objc,obj-c++ --prefix=3D/usr --with-gcc-major-version-only --program-suffix=3D-12 --program-prefix=3Dpowerpc-linux-gnu- --enable-shared --enable-linker-build= -id --libexecdir=3D/usr/lib --without-included-gettext --enable-threads=3Dposix --libdir=3D/usr/lib --enable-nls --enable-clocale=3Dgnu --enable-libstdcxx-= debug --enable-libstdcxx-time=3Dyes --with-default-libstdcxx-abi=3Dnew --enable-gnu-unique-object --disable-libitm --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-libphobos-checking=3Drelease --with-target-system-zlib=3Dauto --with-libphobos-druntime-only=3Dyes --enable-objc-gc=3Dauto --enable-secureplt --disable-softfloat --with-cpu=3Ddefault32 --disable-softfloat --enable-targets=3Dpowerpc-linux,powerpc64-linux --enable-multiarch --disable-werror --with-long-double-128 --enable-multilib --enable-checking=3Drelease --build=3Dpowerpc-linux-gnu --host=3Dpowerpc-li= nux-gnu --target=3Dpowerpc-linux-gnu Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.1.0 (Debian 12.1.0-7) COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a-' /usr/lib/gcc/powerpc-linux-gnu/12/cc1plus -quiet -v -imultiarch powerpc-linux-gnu -D_GNU_SOURCE bytes.cc -msecure-plt -quiet -dumpdir a- -dumpbase bytes.cc -dumpbase-ext .cc -O2 -version -o /tmp/ccXa9nGd.s GNU C++17 (Debian 12.1.0-7) version 12.1.0 (powerpc-linux-gnu) compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP GGC heuristics: --param ggc-min-expand=3D100 --param ggc-min-heapsize=3D131= 072 ignoring duplicate directory "/usr/include/powerpc-linux-gnu/c++/12" ignoring nonexistent directory "/usr/local/include/powerpc-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/powerpc-linux-gnu/12/include-fixed" ignoring nonexistent directory "/usr/lib/gcc/powerpc-linux-gnu/12/../../../../powerpc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/include/c++/12 /usr/include/powerpc-linux-gnu/c++/12 /usr/include/c++/12/backward /usr/lib/gcc/powerpc-linux-gnu/12/include /usr/local/include /usr/include/powerpc-linux-gnu /usr/include End of search list. GNU C++17 (Debian 12.1.0-7) version 12.1.0 (powerpc-linux-gnu) compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP GGC heuristics: --param ggc-min-expand=3D100 --param ggc-min-heapsize=3D131= 072 Compiler executable checksum: 56cdbc606649bdc6108da73e5dd1af6f COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a-' as -v -a32 -K PIC -mppc -many -mbig -o /tmp/ccKx6rlb.o /tmp/ccXa9nGd.s GNU assembler version 2.38.90 (powerpc-linux-gnu) using BFD version (GNU Binutils for Debian) 2.38.90.20220713 COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a-' /usr/lib/gcc/powerpc-linux-gnu/12/cc1plus -quiet -v -imultiarch powerpc-linux-gnu -D_GNU_SOURCE demo.cc -msecure-plt -quiet -dumpdir a- -dumpbase demo.cc -dumpbase-ext .cc -O2 -version -o /tmp/ccXa9nGd.s GNU C++17 (Debian 12.1.0-7) version 12.1.0 (powerpc-linux-gnu) compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP GGC heuristics: --param ggc-min-expand=3D100 --param ggc-min-heapsize=3D131= 072 ignoring duplicate directory "/usr/include/powerpc-linux-gnu/c++/12" ignoring nonexistent directory "/usr/local/include/powerpc-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/powerpc-linux-gnu/12/include-fixed" ignoring nonexistent directory "/usr/lib/gcc/powerpc-linux-gnu/12/../../../../powerpc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /usr/include/c++/12 /usr/include/powerpc-linux-gnu/c++/12 /usr/include/c++/12/backward /usr/lib/gcc/powerpc-linux-gnu/12/include /usr/local/include /usr/include/powerpc-linux-gnu /usr/include End of search list. GNU C++17 (Debian 12.1.0-7) version 12.1.0 (powerpc-linux-gnu) compiled by GNU C version 12.1.0, GMP version 6.2.1, MPFR version 4.1.0, MPC version 1.2.1, isl version isl-0.25-GMP GGC heuristics: --param ggc-min-expand=3D100 --param ggc-min-heapsize=3D131= 072 Compiler executable checksum: 56cdbc606649bdc6108da73e5dd1af6f COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a-' as -v -a32 -K PIC -mppc -many -mbig -o /tmp/ccTxltFy.o /tmp/ccXa9nGd.s GNU assembler version 2.38.90 (powerpc-linux-gnu) using BFD version (GNU Binutils for Debian) 2.38.90.20220713 COMPILER_PATH=3D/usr/lib/gcc/powerpc-linux-gnu/12/:/usr/lib/gcc/powerpc-lin= ux-gnu/12/:/usr/lib/gcc/powerpc-linux-gnu/:/usr/lib/gcc/powerpc-linux-gnu/1= 2/:/usr/lib/gcc/powerpc-linux-gnu/ LIBRARY_PATH=3D/usr/lib/gcc/powerpc-linux-gnu/12/:/usr/lib/gcc/powerpc-linu= x-gnu/12/../../../powerpc-linux-gnu/:/usr/lib/gcc/powerpc-linux-gnu/12/../.= ./../../lib/:/lib/powerpc-linux-gnu/:/lib/../lib/:/usr/lib/powerpc-linux-gn= u/:/usr/lib/../lib/:/usr/lib/gcc/powerpc-linux-gnu/12/../../../:/lib/:/usr/= lib/ COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a.' /usr/lib/gcc/powerpc-linux-gnu/12/collect2 -plugin /usr/lib/gcc/powerpc-linux-gnu/12/liblto_plugin.so -plugin-opt=3D/usr/lib/gcc/powerpc-linux-gnu/12/lto-wrapper -plugin-opt=3D-fresolution=3D/tmp/ccfJV0ms.res -plugin-opt=3D-pass-through= =3D-lgcc_s -plugin-opt=3D-pass-through=3D-lgcc -plugin-opt=3D-pass-through=3D-lc -plugin-opt=3D-pass-through=3D-lgcc_s -plugin-opt=3D-pass-through=3D-lgcc -= -build-id --eh-frame-hdr -V --secure-plt -m elf32ppclinux --hash-style=3Dgnu --as-nee= ded -dynamic-linker /lib/ld.so.1 -pie /usr/lib/gcc/powerpc-linux-gnu/12/../../../powerpc-linux-gnu/Scrt1.o /usr/lib/gcc/powerpc-linux-gnu/12/../../../powerpc-linux-gnu/crti.o /usr/lib/gcc/powerpc-linux-gnu/12/crtbeginS.o -L/usr/lib/gcc/powerpc-linux-gnu/12 -L/usr/lib/gcc/powerpc-linux-gnu/12/../../../powerpc-linux-gnu -L/usr/lib/gcc/powerpc-linux-gnu/12/../../../../lib -L/lib/powerpc-linux-gnu -L/lib/../lib -L/usr/lib/powerpc-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/powerpc-linux-gnu/12/../../.. /tmp/ccKx6rlb.o /tmp/ccTxltFy.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/lib/gcc/powerpc-linux-gnu/12/crtendS.o /usr/lib/gcc/powerpc-linux-gnu/12/../../../powerpc-linux-gnu/crtn.o GNU ld (GNU Binutils for Debian) 2.38.90.20220713 Supported emulations: elf32ppclinux elf32ppc elf32ppcsim elf32lppclinux elf32lppc elf32lppcsim elf64ppc elf64lppc COLLECT_GCC_OPTIONS=3D'-v' '-O2' '-shared-libgcc' '-dumpdir' 'a.' zsh: IOT instruction ./a.out=