https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84811
--- Comment #6 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Martin Liška from comment #5)
> > gcc version 8.0.1 20180310 (experimental) [trunk revision 258413] (GCC)
>
> Just a nit, this revision mentioned above is actually from GCC 7 branch.
> Isn't that the issue?
Martin, it was checked out from the main trunk @
svn://gcc.gnu.org/svn/gcc/trunk.
I still see the ICE with rev. 258535:
$ gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/home/su/software/tmp/gcc/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/8.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-source-trunk/configure --enable-languages=c,c++,lto
--prefix=/home/su/software/tmp/gcc/gcc-trunk --disable-bootstrap
Thread model: posix
gcc version 8.0.1 20180314 (experimental) [trunk revision 258535] (GCC)
$
$ gcctk -O3 -c small.c
during RTL pass: dse1
small.c: In function ‘fn1’:
small.c:12:1: internal compiler error: in smallest_mode_for_size, at
stor-layout.c:355
}
^
0xc8ff8b smallest_mode_for_size(poly_int<1u, unsigned long>, mode_class)
../../gcc-source-trunk/gcc/stor-layout.c:355
0x1437abc smallest_int_mode_for_size(poly_int<1u, unsigned long>)
../../gcc-source-trunk/gcc/machmode.h:842
0x1437abc find_shift_sequence
../../gcc-source-trunk/gcc/dse.c:1701
0x1437abc get_stored_val
../../gcc-source-trunk/gcc/dse.c:1847
0x143a41c record_store
../../gcc-source-trunk/gcc/dse.c:1557
0x143b2c2 scan_insn
../../gcc-source-trunk/gcc/dse.c:2545
0x143c4b2 dse_step1
../../gcc-source-trunk/gcc/dse.c:2657
0x143c4b2 rest_of_handle_dse
../../gcc-source-trunk/gcc/dse.c:3574
0x143c4b2 execute
../../gcc-source-trunk/gcc/dse.c:3672
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
$
