[Bug tree-optimization/92526] New: [10 Regression] ICE in vect_enhance_data_refs_alignment, at tree-vect-data-refs.c:2274 since r278244

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92526

            Bug ID: 92526
           Summary: [10 Regression] ICE in
                    vect_enhance_data_refs_alignment, at
                    tree-vect-data-refs.c:2274 since r278244
           Product: gcc
           Version: 10.0
            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: rsandifo at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: aarch64-linux-gnu

I see the following ICE:

$ gcc gcc/testsuite/gcc.target/aarch64/sve/cost_model_1.c -O3 -mstrict-align
...
0xdeadbeef vect_enhance_data_refs_alignment(_loop_vec_info*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-vect-data-refs.c:2274
0xdeadbeef vect_analyze_loop_2
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-vect-loop.c:2099
0xdeadbeef vect_analyze_loop(loop*, vec_info_shared*)
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-vect-loop.c:2435
0xdeadbeef try_vectorize_loop_1
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-vectorizer.c:892
0xdeadbeef vectorize_loops()
/home/marxin/BIG/buildbot/buildworker/marxinbox-gcc-trunk-aarch64/build/gcc/tree-vectorizer.c:1125