On Linux/x86_64,
50df2b188450457580b5ff4ac1d524fcc74de9bc is the first bad commit
commit 50df2b188450457580b5ff4ac1d524fcc74de9bc
Author: Andrew Pinski <[email protected]>
Date: Sat Jan 10 23:17:12 2026 -0800
match: Simplify `(T1)(a bit_op (T2)b)` to `((T1)a bit_op b)` When b is T1
type and truncating from T2 [PR122845]
caused
FAIL: gcc.dg/store_merging_19.c scan-tree-dump-times store-merging "Merging
successful" 3
with GCC configured with
../../gcc/configure
--prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-6727/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/store_merging_19.c --target_board='unix{-m32}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="dg.exp=gcc.dg/store_merging_19.c --target_board='unix{-m32\
-march=cascadelake}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="dg.exp=gcc.dg/store_merging_19.c --target_board='unix{-m64}'"
$ cd {build_dir}/gcc && make check
RUNTESTFLAGS="dg.exp=gcc.dg/store_merging_19.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.)
