[Bug ipa/96150] New: [10/11 Regression] ICE in analyze_function_body on switch since r10-3199

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96150

            Bug ID: 96150
           Summary: [10/11 Regression] ICE in analyze_function_body on
                    switch since r10-3199
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

The following testcase at -O2 (-O1 and higher) since
r10-3199-g351e7c3b5fbd45bde3efb601f7fee9a31c4f2063
in 
rh1855742.i: In function ‘foo’:
rh1855742.i:23:1: internal compiler error: Segmentation fault
   23 | }
      | ^
0x1300ff4 crash_signal
        ../../gcc/toplev.c:328
0xf34e3e analyze_function_body
        ../../gcc/ipa-fnsummary.c:2802
0xf35974 compute_fn_summary(cgraph_node*, bool)
        ../../gcc/ipa-fnsummary.c:2974
0xf39486 inline_analyze_function(cgraph_node*)
        ../../gcc/ipa-fnsummary.c:4078
0xf39663 ipa_fn_summary_generate
        ../../gcc/ipa-fnsummary.c:4121
0x1182288 execute_ipa_summary_passes(ipa_opt_pass_d*)
        ../../gcc/passes.c:2191
0xbca2f3 ipa_passes
        ../../gcc/cgraphunit.c:2646
0xbca696 symbol_table::compile()
        ../../gcc/cgraphunit.c:2756
0xbcac42 symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:3003


struct S { unsigned j : 3; };
int k, l, m;

void
foo (struct S x)
{
  while (l != 5)
    switch (x.j)
      {
      case 1:
      case 3:
      case 4:
      case 6:
      case 2:
      case 5:
        l = m;
      case 7:
      case 0:
        k = 0;
      default:
        break;
      }
}