[Bug tree-optimization/71144] [6/7 Regression] isl_aff.c:1001: position out of bounds

["vogt at linux dot vnet.ibm.com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71144

--- Comment #6 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
This no longer happens with current trunk.  The warnings are still present, but
the ICE is gone:

(In reply to Dominik Vogt from comment #1)
> I get (pprobably) the same ICE on s390x with today's devel branch in
> pr68279.f90.  Reduced test case (which intentionally has some out of bound
> array accesses):
> 
> MODULE foo 
>   CONTAINS 
>   SUBROUTINE bar(o) 
>     INTEGER, DIMENSION(2, 1) :: a 
>     INTEGER, DIMENSION(1) :: b 
>     INTEGER, DIMENSION(1, 1) :: o 
>     INTEGER :: d 
>      DO i=1,2 
>         b(1:2) = b(1:2) 
>         o(1:1, 1:d) = a(1:1, 1:d) 
>         a(1:2, 2) = b(1:2) 
>         d = d + 1 
>      END DO 
>   END SUBROUTINE bar 
> END MODULE 

> internal compiler error: Aborted
> 0x806bd397 crash_signal
> 	/home/vogt/src/t/gcc/toplev.c:335
> 0x80b3b683 extract_affine_chrec
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:239
> 0x80b3b683 extract_affine
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:381
> 0x80b3b8b7 extract_affine
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:421
> 0x80b3c52d add_condition_to_pbb
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:458
> 0x80b3c52d add_conditions_to_domain
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:525
> 0x80b3c52d build_iteration_domains
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:1017
> 0x80b3c2dd build_iteration_domains
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:1040
> 0x80b3c95f build_poly_scop(scop*)
> 	/home/vogt/src/t/gcc/graphite-sese-to-poly.c:1364
> 0x80b296c9 graphite_transform_loops()
> 	/home/vogt/src/t/gcc/graphite.c:319
> 0x80b29c4f graphite_transforms
> 	/home/vogt/src/t/gcc/graphite.c:356
> 0x80b29c4f execute
> 	/home/vogt/src/t/gcc/graphite.c:433