[Bug tree-optimization/119803] New: ICE on valid code at -O{2,3} on x86_64-linux-gnu: in verify_mask, at value-range.cc:2484

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119803

            Bug ID: 119803
           Summary: ICE on valid code at -O{2,3} on x86_64-linux-gnu: in
                    verify_mask, at value-range.cc:2484
           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: ---

This appears to be a very recent regression as it doesn't reproduce with the
latest build from Compiler Explorer. 

[551] % 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/15.0.1/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 15.0.1 20250414 (experimental) (GCC) 
[552] % 
[552] % gcctk -O2 -c small.c
during IPA pass: cp
small.c:13:1: internal compiler error: in verify_mask, at value-range.cc:2484
   13 | }
      | ^
0x26efca6 internal_error(char const*, ...)
        ../../gcc-trunk/gcc/diagnostic-global-context.cc:517
0xac6192 fancy_abort(char const*, int, char const*)
        ../../gcc-trunk/gcc/diagnostic.cc:1749
0x95086d irange_bitmask::verify_mask() const
        ../../gcc-trunk/gcc/value-range.cc:2484
0x252f059 irange_bitmask::irange_bitmask(generic_wide_int<wide_int_storage>
const&, generic_wide_int<wide_int_storage> const&)
        ../../gcc-trunk/gcc/value-range.h:185
0x252f059 ipcp_store_vr_results
        ../../gcc-trunk/gcc/ipa-cp.cc:6389
0x252fbea ipcp_driver
        ../../gcc-trunk/gcc/ipa-cp.cc:6468
0x252fbea execute
        ../../gcc-trunk/gcc/ipa-cp.cc:6539
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.
[553] % 
[553] % cat small.c
extern void f(int p);
int a, b;
char c;
static int d(int e) { return !e || a == 1 ? 0 : a / e; }
static void h(short e) {
  int g = d(e);
  f(g);
}
void i() {
  c = 128;
  h(c);
  b = d(65536);
}