[Bug rtl-optimization/101797] New: ICE on valid code at -O2 and -O3: in extract_constrain_insn, at recog.c:2670

[zhendong.su at inf dot ethz.ch via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101797

            Bug ID: 101797
           Summary: ICE on valid code at -O2 and -O3: in
                    extract_constrain_insn, at recog.c:2670
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhendong.su at inf dot ethz.ch
  Target Milestone: ---

[566] % gcctk -v
Using built-in specs.
COLLECT_GCC=gcctk
COLLECT_LTO_WRAPPER=/local/suz-local/software/local/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--prefix=/local/suz-local/software/local/gcc-trunk --enable-languages=c,c++
--disable-werror --enable-multilib --with-system-zlib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210806 (experimental) [master revision
9124bbe1857:9d62796a203:fd351c76c23187fdc74d9af6874a54e2e84c4d25] (GCC)
[567] %
[567] % gcctk -Os small.c
[568] %
[568] % gcctk -O2 small.c
small.c: In function ‘main’:
small.c:11:1: error: insn does not satisfy its constraints:
   11 | }
      | ^
(insn 56 55 57 3 (set (reg/v:SI 0 ax [orig:85 c ] [85])
        (not:SI (reg:SI 1 dx [89]))) "small.c":6:7 650 {*one_cmplsi2_1}
     (expr_list:REG_DEAD (reg:SI 1 dx [89])
        (nil)))
during RTL pass: cprop_hardreg
small.c:11:1: internal compiler error: in extract_constrain_insn, at
recog.c:2670
0x615f0a _fatal_insn(char const*, rtx_def const*, char const*, int, char
const*)
        ../../gcc-trunk/gcc/rtl-error.c:108
0x615f33 _fatal_insn_not_found(rtx_def const*, char const*, int, char const*)
        ../../gcc-trunk/gcc/rtl-error.c:118
0xd2e2cd extract_constrain_insn(rtx_insn*)
        ../../gcc-trunk/gcc/recog.c:2670
0xd3a4fa copyprop_hardreg_forward_1
        ../../gcc-trunk/gcc/regcprop.c:825
0xd3b521 execute
        ../../gcc-trunk/gcc/regcprop.c:1390
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.
[569] %
[569] % cat small.c
int a;
int main() {
  int b, c, d, e = 0;
  if (a) {
    c += a;
    e = ~(a % c);
    e || c || (b & d);
  }
  a = e;
  return 0;
}