[Bug tree-optimization/111823] New: ICE on valid code at -O1 and above on x86_64-linux-gnu: in verify_sra_access_forest, at tree-sra.cc:2414

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111823

            Bug ID: 111823
           Summary: ICE on valid code at -O1 and above on
                    x86_64-linux-gnu: in verify_sra_access_forest, at
                    tree-sra.cc:2414
           Product: gcc
           Version: unknown
            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: ---

It appears to be a recent regression.

Compiler Explorer: https://godbolt.org/z/jMsxnbTcK

[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/14.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../gcc-trunk/configure --disable-bootstrap
--enable-checking=yes --prefix=/local/suz-local/software/local/gcc-trunk
--enable-sanitizers --enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 14.0.0 20231015 (experimental) (GCC) 
[515] % 
[515] % gcctk -O1 small.c
during GIMPLE pass: esra
small.c: In function ‘main’:
small.c:9:1: internal compiler error: in verify_sra_access_forest, at
tree-sra.cc:2414
    9 | }
      | ^
0x85c78c verify_sra_access_forest(access*)
        ../../gcc-trunk/gcc/tree-sra.cc:2414
0x1209a92 verify_all_sra_access_forests()
        ../../gcc-trunk/gcc/tree-sra.cc:2465
0x120d6b4 analyze_all_variable_accesses
        ../../gcc-trunk/gcc/tree-sra.cc:3534
0x120dc01 perform_intra_sra
        ../../gcc-trunk/gcc/tree-sra.cc:4726
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.
[516] % 
[516] % cat small.c
static struct A {
  int x : 4;
} a;
static int b;
int main() {
  struct A t[2];
  t[0] = b ? t[1] : a;
  return (b ? t[1].x : 0) && 1;
}