https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127225
Bug ID: 127225
Summary: [17 Regression] ICE: in extract_insn, at recog.cc:2894
with -frounding-math -mgeneral-regs-only -mavx512vbmi
-mno-sse2
Product: gcc
Version: 17.0
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 65513
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=65513&action=edit
reduced testcase
The flag combination does not make sense, I don't know if it points to any real
issue.
Compiler output:
$ x86_64-pc-linux-gnu-gcc -frounding-math -mgeneral-regs-only -mavx512vbmi
-mno-sse2 testcase.c
testcase.c: In function 'foo':
testcase.c:7:1: error: unrecognizable insn:
7 | }
| ^
(insn 10 9 11 2 (set (reg:V2SF 107)
(const_vector:V2SF [
(const_double:SF 0.0 [0x0.0p+0]) repeated x2
])) "testcase.c":6:6 -1
(nil))
during RTL pass: vregs
testcase.c:7:1: internal compiler error: in extract_insn, at recog.cc:2894
0x2f07e1d internal_error(char const*, ...)
/repo/gcc-trunk/gcc/diagnostic-global-context.cc:787
0xe5c1e7 fancy_abort(char const*, int, char const*)
/repo/gcc-trunk/gcc/diagnostics/context.cc:1813
0x8a7228 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/repo/gcc-trunk/gcc/rtl-error.cc:108
0x8a72a5 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/repo/gcc-trunk/gcc/rtl-error.cc:116
0x895d09 extract_insn(rtx_insn*)
/repo/gcc-trunk/gcc/recog.cc:2894
0x1203d6e instantiate_virtual_regs_in_insn
/repo/gcc-trunk/gcc/function.cc:1611
0x1203d6e instantiate_virtual_regs
/repo/gcc-trunk/gcc/function.cc:1987
0x1203d6e execute
/repo/gcc-trunk/gcc/function.cc:2034
/repo/gcc-trunk/binary-trunk-20260903201048-r17-3904-gb3474d5cddda18-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/cc1
-quiet -iprefix
/repo/gcc-trunk/binary-trunk-20260903201048-r17-3904-gb3474d5cddda18-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../lib/gcc/x86_64-pc-linux-gnu/17.0.0/
testcase.c -quiet -dumpdir a- -dumpbase testcase.c -dumpbase-ext .c
-mgeneral-regs-only -mavx512vbmi -mno-sse2 -mtune=generic -march=x86-64
-frounding-math -o /tmp/cc2fdgVt.s
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
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-20260903201048-r17-3904-gb3474d5cddda18-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/17.0.0/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
--disable-bootstrap --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 --enable-libsanitizer
--disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-20260903201048-r17-3904-gb3474d5cddda18-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 17.0.0 20260903 (experimental) (GCC)
