[Bug tree-optimization/97808] New: ICE at -Os and above: in clean, at tree-ssa-pre.c:2053

[zhendong.su at inf dot ethz.ch]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97808

            Bug ID: 97808
           Summary: ICE at -Os and above: in clean, at tree-ssa-pre.c:2053
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zhendong.su at inf dot ethz.ch
  Target Milestone: ---

[514] % 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/11.0.0/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 11.0.0 20201112 (experimental) [master revision
7ea19dcafb8:c6f488d83fd:5d9ade39b8720b61cf63a8be181fb3b487f6ac5b] (GCC) 
[515] % 
[515] % gcctk -O1 -c small.c
[516] % 
[516] % gcctk -Os -c small.c
during GIMPLE pass: pre
small.c: In function ‘g’:
small.c:5:6: internal compiler error: in clean, at tree-ssa-pre.c:2053
    5 | void g() {
      |      ^
0xed6c52 clean
        ../../gcc-trunk/gcc/tree-ssa-pre.c:2053
0xedced5 compute_antic
        ../../gcc-trunk/gcc/tree-ssa-pre.c:2539
0xedeb19 execute
        ../../gcc-trunk/gcc/tree-ssa-pre.c:4363
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.
[517] % 
[517] % cat small.c
int a, e, f;
volatile int b;
unsigned c, d;

void g() {
  int h = b;
  d = e;
  a = -(~h + d);
  c = d >> (b && f) ^ -~h;
}