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[Bug tree-optimization/80105] New: [6/7 Regression] ICE in outer_projection_mupa, at graphite-sese-to-poly.c:1019


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80105

            Bug ID: 80105
           Summary: [6/7 Regression] ICE in outer_projection_mupa, at
                    graphite-sese-to-poly.c:1019
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: rguenth at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: x86_64-linux-gnu
             Build: x86_64-linux-gnu

Starting from r244305, we ICE on:

$ gfortran
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/graphite/pr42326.f90
-fgraphite-identity -O3 -fno-tree-dce -c

internal compiler error: in outer_projection_mupa, at
graphite-sese-to-poly.c:1019
0x1163b75 outer_projection_mupa
        .././../gcc/graphite-sese-to-poly.c:1019
0x1163b75 add_loop_schedule
        .././../gcc/graphite-sese-to-poly.c:1067
0x1164123 embed_in_surrounding_loops
        .././../gcc/graphite-sese-to-poly.c:1141
0x11667ce build_original_schedule
        .././../gcc/graphite-sese-to-poly.c:1181
0x11667ce build_poly_scop(scop*)
        .././../gcc/graphite-sese-to-poly.c:1209
0x114fd2c graphite_transform_loops()
        .././../gcc/graphite.c:320
0x1150300 graphite_transforms
        .././../gcc/graphite.c:362
0x1150300 execute
        .././../gcc/graphite.c:439

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