[Bug tree-optimization/81529] New: [8 Regression] ICE in vectorizable_induction, at tree-vect-loop.c:6613

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81529

            Bug ID: 81529
           Summary: [8 Regression] ICE in vectorizable_induction, at
                    tree-vect-loop.c:6613
           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: ppc64le-linux-gnu

Starting from Richi's r250382 I see ICE on cross-compiler:

$ ./xgcc -B. /home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr80494.f90
-fno-tree-scev-cprop -Ofast -c
during GIMPLE pass: vect
/home/marxin/Programming/gcc/gcc/testsuite/gfortran.dg/pr80494.f90:4:0:

 subroutine CalcCgr(C,rmax,ordgr_max)

internal compiler error: in vectorizable_induction, at tree-vect-loop.c:6613
0x12aac62 vectorizable_induction(gimple*, gimple_stmt_iterator*, gimple**,
_slp_tree*)
        ../../gcc/tree-vect-loop.c:6613
0x129e3a5 vect_analyze_loop_operations
        ../../gcc/tree-vect-loop.c:1780
0x129ee85 vect_analyze_loop_2
        ../../gcc/tree-vect-loop.c:2093
0x129fd47 vect_analyze_loop(loop*, _loop_vec_info*)
        ../../gcc/tree-vect-loop.c:2405
0x12c8159 vectorize_loops()
        ../../gcc/tree-vectorizer.c:669
0x1189ae9 execute
        ../../gcc/tree-ssa-loop.c:412