[Bug tree-optimization/88283] New: ICE in try_improve_iv_set, at tree-ssa-loop-ivopts.c:6677

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88283

            Bug ID: 88283
           Summary: ICE in try_improve_iv_set, at
                    tree-ssa-loop-ivopts.c:6677
           Product: gcc
           Version: 9.0
            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: amker at gcc dot gnu.org, rguenth at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: aarch64-linux-gnu

Probably something graphite-related:

$ gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-8.c
-fgraphite-identity -fnon-call-exceptions -fexceptions -Ofast -mabi=ilp32
during GIMPLE pass: ivopts
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-8.c: In
function ‘foo’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/graphite/interchange-8.c:10:1:
internal compiler error: in try_improve_iv_set, at tree-ssa-loop-ivopts.c:6677
   10 | foo (void)
      | ^~~
0x5c26ec try_improve_iv_set
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop-ivopts.c:6677
0x5c26ec find_optimal_iv_set_1
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop-ivopts.c:6707
0xba3ee1 find_optimal_iv_set
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop-ivopts.c:6729
0xba3ee1 tree_ssa_iv_optimize_loop
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop-ivopts.c:7586
0xba3ee1 tree_ssa_iv_optimize()
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop-ivopts.c:7628
0xbbfad0 execute
       
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-ssa-loop.c:513