[Bug middle-end/71254] New: [5 regression][AArch64] ICE after backport of fix for PR 67278

[clyon at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71254

            Bug ID: 71254
           Summary: [5 regression][AArch64] ICE after backport of fix for
                    PR 67278
           Product: gcc
           Version: 5.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: rguenth at gcc dot gnu.org
          Reporter: clyon at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

In the gcc-5-branch, since commit 236512 (backport of PR middle-end/67278),
I have noticed the newly introduced simd-7.c test causes an ICE on aarch64*
targets.

spawn -ignore SIGHUP
/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64-none-linux-gnu/gcc3/gcc/xgcc
-B/aci-gcc-fsf/builds/gcc-fsf-gccsrc/obj-aarch64-none-linux-gnu/gcc3/gcc/
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.dg/simd-7.c
-fno-diagnostics-show-caret -fdiagnostics-color=never -w -Wno-psabi
-DSTACK_SIZE=16384 -S -o simd-7.s
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.dg/simd-7.c: In function
'sum':
/aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/testsuite/gcc.dg/simd-7.c:8:1: internal
compiler error: in emit_move_insn, at expr.c:3601
0x743df4 emit_move_insn(rtx_def*, rtx_def*)
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/expr.c:3601
0x7249fa copy_to_reg(rtx_def*)
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/explow.c:590
0x734f0b emit_group_move_into_temps(rtx_def*)
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/expr.c:1888
0x7ac08f assign_parm_setup_block
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/function.c:2881
0x7b356a assign_parms
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/function.c:3662
0x7b4250 expand_function_start(tree_node*)
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/function.c:5068
0x6510dd execute
        /aci-gcc-fsf/sources/gcc-fsf/gccsrc/gcc/cfgexpand.c:6046
Please submit a full bug report,