[Bug tree-optimization/106322] [12 Regression] tree-vectorize: Wrong code at O2 level (-fno-tree-vectorize is working) since r12-2404-ga1d27560770818c5

["malat at debian dot org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106322

Mathieu Malaterre <malat at debian dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #51 from Mathieu Malaterre <malat at debian dot org> ---
@Kewen I am using the latest gcc-12 update from doko@d.o:

*
https://tracker.debian.org/news/1363780/accepted-gcc-12-1220-3-source-into-unstable/


It does include the patch for PR/106322 but I am getting exactly the same
behavior as before:

```
% gcc -v -O2 -mtune=generic -march=i686 106322.c && ./a.out
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/i686-linux-gnu/12/lto-wrapper
Target: i686-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 12.2.0-3'
--with-bugurl=file:///usr/share/doc/gcc-12/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-12
--program-prefix=i686-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin
--enable-default-pie --with-system-zlib --enable-libphobos-checking=release
--with-target-system-zlib=auto --enable-objc-gc=auto --enable-targets=all
--enable-multiarch --disable-werror --with-arch-32=i686
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-checking=release --build=i686-linux-gnu --host=i686-linux-gnu
--target=i686-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.2.0 (Debian 12.2.0-3)
COLLECT_GCC_OPTIONS='-v' '-O2' '-mtune=generic' '-march=i686' '-dumpdir' 'a-'
 /usr/lib/gcc/i686-linux-gnu/12/cc1 -quiet -v -imultiarch i386-linux-gnu
106322.c -quiet -dumpdir a- -dumpbase 106322.c -dumpbase-ext .c -mtune=generic
-march=i686 -O2 -version -fasynchronous-unwind-tables -o /tmp/ccKGWuAf.s
GNU C17 (Debian 12.2.0-3) version 12.2.0 (i686-linux-gnu)
        compiled by GNU C version 12.2.0, 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=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/i386-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/i686-linux-gnu/12/include-fixed"
ignoring nonexistent directory
"/usr/lib/gcc/i686-linux-gnu/12/../../../../i686-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/lib/gcc/i686-linux-gnu/12/include
 /usr/local/include
 /usr/include/i386-linux-gnu
 /usr/include
End of search list.
GNU C17 (Debian 12.2.0-3) version 12.2.0 (i686-linux-gnu)
        compiled by GNU C version 12.2.0, 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=100 --param ggc-min-heapsize=131072
Compiler executable checksum: bab440224e23e29e673aafc5eddaffb6
COLLECT_GCC_OPTIONS='-v' '-O2' '-mtune=generic' '-march=i686' '-dumpdir' 'a-'
 as -v --32 -o /tmp/ccKi1Hwd.o /tmp/ccKGWuAf.s
GNU assembler version 2.39 (i686-linux-gnu) using BFD version (GNU Binutils for
Debian) 2.39
COMPILER_PATH=/usr/lib/gcc/i686-linux-gnu/12/:/usr/lib/gcc/i686-linux-gnu/12/:/usr/lib/gcc/i686-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/12/:/usr/lib/gcc/i686-linux-gnu/
LIBRARY_PATH=/usr/lib/gcc/i686-linux-gnu/12/:/usr/lib/gcc/i686-linux-gnu/12/../../../i386-linux-gnu/:/usr/lib/gcc/i686-linux-gnu/12/../../../../lib/:/lib/i386-linux-gnu/:/lib/../lib/:/usr/lib/i386-linux-gnu/:/usr/lib/../lib/:/usr/lib/gcc/i686-linux-gnu/12/../../../:/lib/:/usr/lib/
COLLECT_GCC_OPTIONS='-v' '-O2' '-mtune=generic' '-march=i686' '-dumpdir' 'a.'
 /usr/lib/gcc/i686-linux-gnu/12/collect2 -plugin
/usr/lib/gcc/i686-linux-gnu/12/liblto_plugin.so
-plugin-opt=/usr/lib/gcc/i686-linux-gnu/12/lto-wrapper
-plugin-opt=-fresolution=/tmp/ccJ6oy3P.res -plugin-opt=-pass-through=-lgcc
-plugin-opt=-pass-through=-lgcc_s -plugin-opt=-pass-through=-lc
-plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_s --build-id
--eh-frame-hdr -m elf_i386 --hash-style=gnu --as-needed -dynamic-linker
/lib/ld-linux.so.2 -pie
/usr/lib/gcc/i686-linux-gnu/12/../../../i386-linux-gnu/Scrt1.o
/usr/lib/gcc/i686-linux-gnu/12/../../../i386-linux-gnu/crti.o
/usr/lib/gcc/i686-linux-gnu/12/crtbeginS.o -L/usr/lib/gcc/i686-linux-gnu/12
-L/usr/lib/gcc/i686-linux-gnu/12/../../../i386-linux-gnu
-L/usr/lib/gcc/i686-linux-gnu/12/../../../../lib -L/lib/i386-linux-gnu
-L/lib/../lib -L/usr/lib/i386-linux-gnu -L/usr/lib/../lib
-L/usr/lib/gcc/i686-linux-gnu/12/../../.. /tmp/ccKi1Hwd.o -lgcc --push-state
--as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s
--pop-state /usr/lib/gcc/i686-linux-gnu/12/crtendS.o
/usr/lib/gcc/i686-linux-gnu/12/../../../i386-linux-gnu/crtn.o
COLLECT_GCC_OPTIONS='-v' '-O2' '-mtune=generic' '-march=i686' '-dumpdir' 'a.'
zsh: IOT instruction  ./a.out
```