[Bug target/102230] New: ICE in classify_argument, at config/i386/i386.c:2474

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102230

            Bug ID: 102230
           Summary: ICE in classify_argument, at config/i386/i386.c:2474
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com
  Target Milestone: ---
            Target: x86_64-unknown-linux-gnu

gcc-12.0.0-alpha20210905 snapshot (g:a827909537cf085e5673ca7816b7bd7151d89fc5)
ICEs when compiling the following testcase, reduced from
gcc/testsuite/gcc.target/arm/armv8_2-fp16-arith-2.c:

typedef _Float16 float16x4_t __attribute__ ((vector_size (8)));

float16x4_t
test_float16x4_t (float16x4_t a)
{
  return a;
}

% x86_64-unknown-linux-gnu-gcc-12.0.0 -c nyecizge.c
nyecizge.c: In function 'test_float16x4_t':
nyecizge.c:5:1: internal compiler error: in classify_argument, at
config/i386/i386.c:2474
    5 | {
      | ^
0x78253f classify_argument
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/config/i386/i386.c:2474
0x120239a examine_argument
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/config/i386/i386.c:2493
0x12058ff ix86_return_in_memory
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/config/i386/i386.c:4186
0xb2d715 aggregate_value_p(tree_node const*, tree_node const*)
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/function.c:2119
0xb321ca allocate_struct_function(tree_node*, bool)
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/function.c:4845
0x84f23c store_parm_decls()
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c/c-decl.c:10128
0x8af40f c_parser_declaration_or_fndef
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c/c-parser.c:2506
0x8b7a53 c_parser_external_declaration
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c/c-parser.c:1780
0x8b84bb c_parser_translation_unit
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c/c-parser.c:1653
0x8b84bb c_parse_file()
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c/c-parser.c:22581
0x919b3d c_common_parse_file()
       
/var/tmp/portage/sys-devel/gcc-12.0.0_alpha20210905/work/gcc-12-20210905/gcc/c-family/c-opts.c:1236