[Bug tree-optimization/99746] New: ICE in vect_get_vec_defs_for_operand, at tree-vect-stmts.c:1450

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99746

            Bug ID: 99746
           Summary: ICE in vect_get_vec_defs_for_operand, at
                    tree-vect-stmts.c:1450
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

Created attachment 50467
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50467&action=edit
Testcase

gfortran-11.0.1-alpha20210321 snapshot
(g:fc24ea2374259d401a46ce3526688b7e79d4cc13) ICEs when compiling the attached
testcase w/ -march=armv8.3-a -O2 -ftree-loop-vectorize:

% aarch64-linux-gnu-gfortran-11.0.1 -march=armv8.3-a -O2 -ftree-loop-vectorize
-c k8x66s8b.f
during GIMPLE pass: vect
k8x66s8b.f:1:23:

    1 |       SUBROUTINE CLAREF(A, LDA, WANTZ, Z, BLOCK, IROW1, ICOL1,
      |                       ^
internal compiler error: in vect_get_vec_defs_for_operand, at
tree-vect-stmts.c:1450
0x7ba760 vect_get_vec_defs_for_operand(vec_info*, _stmt_vec_info*, unsigned
int, tree_node*, vec<tree_node*, va_heap, vl_ptr>*, tree_node*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vect-stmts.c:1450
0x11e6df6 vectorizable_call
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vect-stmts.c:3459
0x11f6478 vect_transform_stmt(vec_info*, _stmt_vec_info*,
gimple_stmt_iterator*, _slp_tree*, _slp_instance*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vect-stmts.c:10962
0x11f9ce5 vect_transform_loop_stmt
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vect-loop.c:9212
0x1215d5c vect_transform_loop(_loop_vec_info*, gimple*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vect-loop.c:9641
0x1244daf try_vectorize_loop_1
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vectorizer.c:1104
0x1245b50 vectorize_loops()
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210321/work/gcc-11-20210321/gcc/tree-vectorizer.c:1243