[Bug target/116598] New: gcc.dg/c23-attr-reproducible-1.c and gcc.dg/c23-attr-unsequenced-1.c ICEs on aarch64 due to searching for attributes

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116598

            Bug ID: 116598
           Summary: gcc.dg/c23-attr-reproducible-1.c and
                    gcc.dg/c23-attr-unsequenced-1.c ICEs on aarch64 due to
                    searching for attributes
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Keywords: aarch64-sme, testsuite-fail
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---
            Target: aarch64

Reduced testcase:
```
int f12 (long long *y) [[reproducible]] {}
```

The ICE and backtrace:
```
t.c: In function ‘f12’:
t.c:1:1: internal compiler error: Segmentation fault
    1 | int f12 (long long *y) [[reproducible]] {}
      | ^~~
0x324ec50 internal_error(char const*, ...)
        ../../gcc/diagnostic-global-context.cc:492
0x176a3ca crash_signal
        ../../gcc/toplev.cc:321
0xda07bf tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../gcc/tree.h:3632
0x1c5bbbf aarch64_lookup_shared_state_flags
        ../../gcc/config/aarch64/aarch64.cc:600
0x1c6079f aarch64_fntype_shared_flags
        ../../gcc/config/aarch64/aarch64.cc:2197
0x1c607be aarch64_fntype_pstate_za
        ../../gcc/config/aarch64/aarch64.cc:2206
0x1c609ab aarch64_fndecl_pstate_za
        ../../gcc/config/aarch64/aarch64.cc:2266
0x1c609d6 aarch64_fndecl_isa_mode
        ../../gcc/config/aarch64/aarch64.cc:2276
0x1c917db aarch64_set_current_function
        ../../gcc/config/aarch64/aarch64.cc:19142
0x1254cdc invoke_set_current_function_hook
        ../../gcc/function.cc:4692
0x1255039 allocate_struct_function(tree_node*, bool)
        ../../gcc/function.cc:4815
0xdcc501 store_parm_decls()
        ../../gcc/c/c-decl.cc:11320
0xe3cff0 c_parser_declaration_or_fndef
        ../../gcc/c/c-parser.cc:2990
0xe3aa1c c_parser_external_declaration
        ../../gcc/c/c-parser.cc:2060
0xe3a4a8 c_parser_translation_unit
        ../../gcc/c/c-parser.cc:1914
0xe8f637 c_parse_file()
        ../../gcc/c/c-parser.cc:27337
0xf3badc c_common_parse_file()
        ../../gcc/c-family/c-opts.cc:1315
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

```

Looks like the issue is when reproducible is not added due to the pointer but
the attribute is still there.