On Sat, Oct 9, 2021 at 1:27 AM sunil.k.pandey via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> On Linux/x86_64,
>
> 2b8453c401b699ed93c085d0413ab4b5030bcdb8 is the first bad commit
> commit 2b8453c401b699ed93c085d0413ab4b5030bcdb8
> Author: liuhongt <hongtao....@intel.com>
> Date: Mon Sep 6 13:48:49 2021 +0800
>
> Enable auto-vectorization at O2 with very-cheap cost model.
>
> caused
>
> FAIL: gcc.dg/optimize-bswapsi-5.c scan-tree-dump-times optimized "=
> __builtin_bswap32 \\(" 2
> FAIL: gcc.dg/optimize-bswapsi-6.c scan-tree-dump store-merging "32 bit bswap
> implementation found at"
> FAIL: gcc.dg/torture/pr69760.c -O2 -flto -fuse-linker-plugin
> -fno-fat-lto-objects (test for excess errors)
Those testcase should be adjusted with either add -fno-tree-vectorize
or add -mtune=generic when target is x86 except for runtime test
pr69760.c which seems to be a real bug.
> FAIL: gcc.dg/Warray-bounds-51.c target { i?86-*-* x86_64-*-* } (test for
> warnings, line 41)
> FAIL: gcc.dg/Wstringop-overflow-14.c target { i?86-*-* x86_64-*-* } (test
> for warnings, line 38)
> FAIL: g++.dg/tree-ssa/pr94403.C scan-tree-dump-times store-merging
> "__builtin_bswap32" 1
> FAIL: g++.dg/tree-ssa/pr94403.C scan-tree-dump-times store-merging
> "__builtin_bswap64" 1
>
> with GCC configured with
>
> ../../gcc/configure
> --prefix=/local/skpandey/gccwork/toolwork/gcc-bisect-master/master/r12-4240/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="dg.exp=gcc.dg/optimize-bswapsi-5.c --target_board='unix{-m64\
> -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/optimize-bswapsi-6.c --target_board='unix{-m32\
> -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/optimize-bswapsi-6.c --target_board='unix{-m64\
> -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg-torture.exp=gcc.dg/torture/pr69760.c
> --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/Warray-bounds-51.c --target_board='unix{-m32\
> -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/Warray-bounds-51.c --target_board='unix{-m64\
> -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-14.c
> --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=gcc.dg/Wstringop-overflow-14.c
> --target_board='unix{-m64\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check
> RUNTESTFLAGS="dg.exp=g++.dg/tree-ssa/pr94403.C --target_board='unix{-m64\
> -march=cascadelake}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-7.c
> --target_board='unix{-m32}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-7.c
> --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-7.c
> --target_board='unix{-m64}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-7.c
> --target_board='unix{-m64\ -march=cascadelake}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-8.c
> --target_board='unix{-m32}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-8.c
> --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-8.c
> --target_board='unix{-m64}'"
> $ cd {build_dir}/x86_64-linux/libgomp/testsuite && make check
> RUNTESTFLAGS="c++.exp=libgomp.c-c++-common/lastprivate-conditional-8.c
> --target_board='unix{-m64\ -march=cascadelake}'"
>
> (Please do not reply to this email, for question about this report, contact
> me at skpgkp2 at gmail dot com)
--
BR,
Hongtao
