https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100626
--- Comment #4 from Haoxin Tu <haoxintu at gmail dot com> ---
I found that it also crashes (under -O1 and -Os) on today's trunk version of
GCC.
$cat small.c
#include <stdint.h>
int a;
void b() {
int c;
uint64_t *d = &c;
uint8_t *e;
if (a)
*d &= *e;
if (*d)
for (;;)
;
}
$gcc -w -O1 -m32 small.c (or -Os)
during RTL pass: split1
small.c: In function ‘b’:
small.c:12:1: internal compiler error: Segmentation fault
12 | }
| ^
0xba0cef crash_signal
../../gcc/toplev.c:327
0xefc40a ix86_fixup_binary_operands(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:900
0xefc5bb ix86_expand_binary_operator(rtx_code, machine_mode, rtx_def**)
../../gcc/config/i386/i386-expand.c:943
0x1214538 gen_andsi3(rtx_def*, rtx_def*, rtx_def*)
../../gcc/config/i386/i386.md:9091
0x12147b4 gen_split_191(rtx_insn*, rtx_def**)
../../gcc/config/i386/i386.md:9123
0x13f8f22 split_insns(rtx_def*, rtx_insn*)
../../gcc/config/i386/i386.md:14140
0x87e61e try_split(rtx_def*, rtx_insn*, int)
../../gcc/emit-rtl.c:3786
0xb15ad1 split_insn
../../gcc/recog.c:3363
0xb1af47 split_all_insns()
../../gcc/recog.c:3467
0xb1afd8 execute
../../gcc/recog.c:4385
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.
$gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/media/haoxin/SeagateData/haoxin-data/dut-research/compilers/gcc/build/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../configure
--prefix=/home/haoxin/haoxin-data/dut-research/compilers/gcc/build/
--enable-bootstrap --enable-checking=release --enable-languages=c,c++
--enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210517 (experimental) (GCC)
