On Linux/x86_64,
e55de74d50d236db0472431fe242f3244e41b884 is the first bad commit
commit e55de74d50d236db0472431fe242f3244e41b884
Author: Richard Biener <[email protected]>
Date: Tue Feb 10 09:46:08 2026 +0100
tree-optimization/107690 - avoid creating un-analyzable loop exits
caused
FAIL: gcc.dg/guality/pr54693-2.c -O2 -DPREVENT_OPTIMIZATION line 21 x == 10
- i
FAIL: gcc.dg/guality/pr54693-2.c -O2 -flto -fno-use-linker-plugin
-flto-partition=none -DPREVENT_OPTIMIZATION line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects -DPREVENT_OPTIMIZATION line 21 x == 10 - i
FAIL: gcc.dg/guality/pr54693-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects -DPREVENT_OPTIMIZATION line 21 y == 20 - 2 * i
FAIL: gcc.dg/guality/pr54693-2.c -O2 -flto -fuse-linker-plugin
-fno-fat-lto-objects -DPREVENT_OPTIMIZATION line 21 z == 30 - 3 * i
FAIL: gcc.dg/guality/pr54693-2.c -O3 -fomit-frame-pointer -funroll-loops
-fpeel-loops -ftracer -finline-functions -DPREVENT_OPTIMIZATION line 21 x ==
10 - i
FAIL: gcc.dg/guality/pr54693-2.c -O3 -g -DPREVENT_OPTIMIZATION line 21 x ==
10 - i
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-7431/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="guality.exp=gcc.dg/guality/pr54693-2.c
--target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr54693-2.c --target_board='unix{-m32\
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr54693-2.c
--target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="guality.exp=gcc.dg/guality/pr54693-2.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.)
