[Bug target/99807] New: ICE in vect_slp_analyze_node_operations_1, at tree-vect-slp.c:3727

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99807

            Bug ID: 99807
           Summary: ICE in vect_slp_analyze_node_operations_1, at
                    tree-vect-slp.c:3727
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: aarch64-linux-gnu

gfortran-11.0.1-alpha20210328 snapshot
(g:499fa254ae8c9752d8c2cf3130b13ffddfd83546) ICEs when compiling the following
testcase w/ -march=armv8.3-a -O1 -ftree-slp-vectorize:

subroutine cppco(ap, z)
  implicit none
  complex :: ap(*), z(*)

  z(1) = z(1) + z(2) * (ap(1))

  return
end subroutine cppco

% aarch64-linux-gnu-gfortran-11.0.1 -march=armv8.3-a -O1 -ftree-slp-vectorize
-c xrd4htvk.f90
during GIMPLE pass: slp
xrd4htvk.f90:1:16:

    1 | subroutine cppco(ap, z)
      |                ^
internal compiler error: in vect_slp_analyze_node_operations_1, at
tree-vect-slp.c:3727
0x7c41bf vect_slp_analyze_node_operations_1
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:3727
0x7c41bf vect_slp_analyze_node_operations
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:3933
0x123510b vect_slp_analyze_node_operations
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:3913
0x123510b vect_slp_analyze_node_operations
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:3913
0x1237972 vect_slp_analyze_operations(vec_info*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:4120
0x123b01d vect_slp_analyze_bb_1
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:4899
0x123b01d vect_slp_region
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:4945
0x123b01d vect_slp_bbs
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:5095
0x123ce3c vect_slp_function(function*)
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vect-slp.c:5181
0x12437fa execute
       
/var/tmp/portage/cross-aarch64-linux-gnu/gcc-11.0.1_alpha20210328/work/gcc-11-20210328/gcc/tree-vectorizer.c:1450