https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89902
Bug ID: 89902
Summary: ICE: in extract_insn, at recog.c:2310: unrecognizable
insn with -mavx512bitalg
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: zsojka at seznam dot cz
Target Milestone: ---
Host: x86_64-pc-linux-gnu
Target: i686-pc-linux-gnu
Created attachment 46065
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46065&action=edit
reduced testcase
Compiler output:
$ i686-pc-linux-gnu-gcc -O2 -fno-tree-coalesce-vars -mavx512bitalg testcase.c
testcase.c: In function 'foo':
testcase.c:8:1: error: unrecognizable insn:
8 | }
| ^
(insn 7 6 17 2 (set (subreg:V2DI (reg/v:DI 86 [ x ]) 0)
(ashift:V2DI (subreg:V2DI (reg/v:DI 86 [ x ]) 0)
(subreg:QI (subreg:V2DI (reg/v:DI 86 [ x ]) 0) 0)))
"testcase.c":5:5 -1
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))
during RTL pass: subreg2
testcase.c:8:1: internal compiler error: in extract_insn, at recog.c:2310
0x67b7f2 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.c:108
0x67b86e _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.c:116
0x671060 extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.c:2310
0x1842257 decompose_multiword_subregs
/repo/gcc-trunk/gcc/lower-subreg.c:1540
0x18439ed execute
/repo/gcc-trunk/gcc/lower-subreg.c:1807
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.
$ i686-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-i686/bin/i686-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-270053-checking-yes-rtl-df-extra-i686/bin/../libexec/gcc/i686-pc-linux-gnu/9.0.1/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --with-sysroot=/usr/i686-pc-linux-gnu
--build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=i686-pc-linux-gnu --with-ld=/usr/bin/i686-pc-linux-gnu-ld
--with-as=/usr/bin/i686-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-270053-checking-yes-rtl-df-extra-i686
Thread model: posix
gcc version 9.0.1 20190401 (experimental) (GCC)
