https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97506
Bug ID: 97506
Summary: [11 Regression] ICE: in extract_insn, at recog.c:2294
(unrecognizable insn) with -mavx512vbmi -mavx512vl
Product: gcc
Version: 11.0
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: x86_64-pc-linux-gnu
Created attachment 49410
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49410&action=edit
reduced testcase
Compiler output:
$ x86_64-pc-linux-gnu-gcc -Og -finline-functions-called-once -fno-tree-ccp
-mavx512vbmi -mavx512vl testcase.c
testcase.c: In function 'foo':
testcase.c:15:1: error: unrecognizable insn:
15 | }
| ^
(insn 9 8 10 2 (set (reg:V16QI 84 [ _8 ])
(vec_merge:V16QI (const_vector:V16QI [
(const_int 0 [0]) repeated x16
])
(const_vector:V16QI [
(const_int 0 [0]) repeated x16
])
(reg:HI 90))) "testcase.c":8:17 -1
(nil))
during RTL pass: vregs
testcase.c:15:1: internal compiler error: in extract_insn, at recog.c:2294
0x6ef463 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.c:108
0x6ef4e6 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.c:116
0x6de26e extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.c:2294
0xce62b3 instantiate_virtual_regs_in_insn
/repo/gcc-trunk/gcc/function.c:1607
0xce62b3 instantiate_virtual_regs
/repo/gcc-trunk/gcc/function.c:1977
0xce62b3 execute
/repo/gcc-trunk/gcc/function.c:2026
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.
$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r11-4031-20201019090534-g04ffed2ef29-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/11.0.0/lto-wrapper
Target: x86_64-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 --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r11-4031-20201019090534-g04ffed2ef29-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20201019 (experimental) (GCC)
