https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112904
Bug ID: 112904
Summary: ICE in extract_insn, at recog.cc:2791 with -mxop since
r14-4964-g7eed861e8ca3f5
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: mjires at suse dot cz
CC: liuhongt at gcc dot gnu.org
Target Milestone: ---
Compiling reduced testcase g++.target/i386/part-vect-vcondhf.C results in ICE
since r14-4964-g7eed861e8ca3f5.
$ cat part-vect-vcondhf.C
typedef _Float16 __attribute__((__vector_size__(8))) __v4hf;
__v4hf cf, df;
__attribute__((__vector_size__(4 * sizeof(short)))) short csf_ne_d;
__v4hf csf_ne() { return csf_ne_d ? cf : df; }
$ g++ part-vect-vcondhf.C -mxop
part-vect-vcondhf.C: In function ‘__v4hf csf_ne()’:
part-vect-vcondhf.C:4:46: error: unrecognizable insn:
4 | __v4hf csf_ne() { return csf_ne_d ? cf : df; }
| ^
(insn 10 9 13 2 (set (reg:V4HF 102 [ _6 ])
(if_then_else:V4HF (subreg:V4HF (reg:V4HI 99 [ _2 ]) 0)
(reg:V4HF 100 [ cf.1_3 ])
(reg:V4HF 101 [ df.2_4 ]))) "part-vect-vcondhf.C":4:42 -1
(nil))
during RTL pass: vregs
part-vect-vcondhf.C:4:46: internal compiler error: in extract_insn, at
recog.cc:2812
0x8da3b4 _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
/home/mjires/git/GCC/master/gcc/rtl-error.cc:108
0x8da3d0 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
/home/mjires/git/GCC/master/gcc/rtl-error.cc:116
0x8d88f1 extract_insn(rtx_insn*)
/home/mjires/git/GCC/master/gcc/recog.cc:2812
0xf77cc0 instantiate_virtual_regs_in_insn
/home/mjires/git/GCC/master/gcc/function.cc:1611
0xf77cc0 instantiate_virtual_regs
/home/mjires/git/GCC/master/gcc/function.cc:1994
0xf77cc0 execute
/home/mjires/git/GCC/master/gcc/function.cc:2041
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.
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/home/mjires/built/master/libexec/gcc/x86_64-pc-linux-gnu/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/mjires/git/GCC/master/configure
--prefix=/home/mjires/built/master --disable-bootstrap --enable-checking
--enable-languages=c,c++,fortran,lto : (reconfigured)
/home/mjires/git/GCC/master/configure --prefix=/home/mjires/built/master
--disable-bootstrap --enable-checking --enable-languages=c,c++,fortran,lto
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231207 (experimental) (GCC)
