[Bug c/106432] New: ice in range_on_edge, at gimple-range.cc:204

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106432

            Bug ID: 106432
           Summary: ice in range_on_edge, at gimple-range.cc:204
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 53344
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=53344&action=edit
C source code

The attached partially reduced C code does this with compiler flag -O3:

$ ../results.20220724.asan.ubsan/bin/gcc -c -O3 bug831.c 2>&1 | more
during GIMPLE pass: dom
/home/dcb36/rpmbuild/BUILD/petsc-3.16.3/petsc-3.16.3/src/ts/utils/dmplexlandau/p
lexland.c: In function ‘ProcessOptions’:
/home/dcb36/rpmbuild/BUILD/petsc-3.16.3/petsc-3.16.3/src/ts/utils/dmplexlandau/p
lexland.c:1418:23: internal compiler error: in range_on_edge, at
gimple-range.cc
:204
 1418 | static PetscErrorCode ProcessOptions(LandauCtx *ctx, const char
prefix[]
)
      |                       ^~~~~~~~~~~~~~
0x1bec52d gimple_ranger::range_on_edge(vrange&, edge_def*, tree_node*)
        ../../trunk.git/gcc/gimple-range.cc:204

The problem first seems to occur sometime in the git hash range
1cc0e9a46e79e7cc..8b8103dcd2624936, a distance of 24 commits.

I will finish the reduce and post it.