[Bug tree-optimization/77318] New: [7 regression] FAIL: gfortran.dg/graphite/pr68279.f90 -O (internal compiler error)

["schwab at linux-m68k dot org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77318

            Bug ID: 77318
           Summary: [7 regression] FAIL: gfortran.dg/graphite/pr68279.f90
                     -O  (internal compiler error)
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: rguenth at gcc dot gnu.org
            Blocks: 77290
  Target Milestone: ---
            Target: aarch64-*-*

Uncovered by r239607.  This is using ISL 0.16.

$ gcc/gfortran -B gcc/ -B aarch64-suse-linux/libgfortran/ -std=legacy
-floop-nest-optimize -O2 -S ../gcc/testsuite/gfortran.dg/graphite/pr68279.f90 
isl_aff.c:1001: position out of bounds
../gcc/testsuite/gfortran.dg/graphite/pr68279.f90:8:0:

   SUBROUTINE stack_binning(params_in, params_out, stack_size)

internal compiler error: Aborted
0xbb3e0f crash_signal
        ../../gcc/toplev.c:335
0x112a33b extract_affine_chrec
        ../../gcc/graphite-sese-to-poly.c:239
0x112a33b extract_affine
        ../../gcc/graphite-sese-to-poly.c:381
0x112a1d7 extract_affine
        ../../gcc/graphite-sese-to-poly.c:421
0x112a1d7 extract_affine
        ../../gcc/graphite-sese-to-poly.c:421
0x112b36b add_condition_to_pbb
        ../../gcc/graphite-sese-to-poly.c:458
0x112b36b add_conditions_to_domain
        ../../gcc/graphite-sese-to-poly.c:525
0x112b36b build_iteration_domains
        ../../gcc/graphite-sese-to-poly.c:1017
0x112b0fb build_iteration_domains
        ../../gcc/graphite-sese-to-poly.c:1040
0x112b957 build_poly_scop(scop*)
        ../../gcc/graphite-sese-to-poly.c:1364
0x1115abf graphite_transform_loops()
        ../../gcc/graphite.c:319
0x111600f graphite_transforms
        ../../gcc/graphite.c:356
0x111600f execute
        ../../gcc/graphite.c:433


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77290
[Bug 77290] [7 regression] test case gcc.dg/tree-ssa/pr71347.c fails starting
with r239565