https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100549
Bug ID: 100549
Summary: ICE: Segmentation fault, gsi_insert_seq_nodes_before,
during GIMPLE pass: lower
Product: gcc
Version: tree-ssa
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: cnsun at uwaterloo dot ca
Target Milestone: ---
$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/scratch/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/tmp.FUbEknNORK-gcc-builder/gcc/configure
--enable-languages=c,c++,lto --enable-checking-yes --enable-multiarch
--prefix=/scratch/software/gcc-trunk --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210511 (experimental) [master revision
:7db32cac8:aa891c56f25baac94db004e309d1b6e40b770a95] (GCC)
$ cat mutant.c
typedef short v8hi __attribute__((vector_size(16)));
f6(v8hi a) { __builtin_ia32_pcmpgtw128(a, a); }
$ gcc-trunk -O0 mutant.c
mutant.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
2 | f6(v8hi a) { __builtin_ia32_pcmpgtw128(a, a); }
| ^~
during GIMPLE pass: lower
mutant.c: In function ‘f6’:
mutant.c:2:1: internal compiler error: Segmentation fault
0xef7273 crash_signal
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/toplev.c:327
0xbebb17 gsi_insert_seq_nodes_before
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-iterator.c:130
0x12a30c6 ix86_gimple_fold_builtin(gimple_stmt_iterator*)
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/config/i386/i386.c:18003
0xc01508 gimple_fold_call
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-fold.c:5586
0xc0288b fold_stmt_1
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-fold.c:6283
0x19177c3 lower_stmt
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-low.c:388
0x19177c3 lower_sequence
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-low.c:217
0x191766d lower_gimple_bind
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-low.c:473
0x191852d lower_function_body
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-low.c:110
0x191852d execute
/tmp/tmp.FUbEknNORK-gcc-builder/gcc/gcc/gimple-low.c:195
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.
