[Bug c/110575] New: gcc: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in build_aligned_type

[Bug c/110575] New: gcc: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in build_aligned_type

[141242068 at smail dot nju.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110575

            Bug ID: 110575
           Summary: gcc: internal compiler error: tree check: expected
                    class 'type', have 'exceptional' (error_mark) in
                    build_aligned_type
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: 141242068 at smail dot nju.edu.cn
  Target Milestone: ---

The testcase:
```
void __GIMPLE(ssa, startwith("slp")) bar() {
  a = __MEM<v16si, 32>((int *restrict)b(c));
}
```

When attempting to compile this program using `gcc-14` with option `-O0`, gcc
reports internal compiler error as below:
```
<source>:1:6: error: '__GIMPLE' only valid with '-fgimple'
    1 | void __GIMPLE(ssa, startwith("slp")) bar() {
      |      ^~~~~~~~
<source>: In function 'bar':
<source>:2:3: error: 'a' undeclared (first use in this function)
    2 |   a = __MEM<v16si, 32>((int *restrict)b(c));
      |   ^
<source>:2:3: note: each undeclared identifier is reported only once for each
function it appears in
<source>:2:13: error: unknown type name 'v16si'
    2 |   a = __MEM<v16si, 32>((int *restrict)b(c));
      |             ^~~~~
<source>:2:3: internal compiler error: tree check: expected class 'type', have
'exceptional' (error_mark) in build_aligned_type, at tree.cc:5700
    2 |   a = __MEM<v16si, 32>((int *restrict)b(c));
      |   ^
0x213983e internal_error(char const*, ...)
        ???:0
0x8959fe tree_class_check_failed(tree_node const*, tree_code_class, char
const*, int, char const*)
        ???:0
0xa7aeae c_parser_parse_gimple_body(c_parser*, char*, c_declspec_il,
profile_count)
        ???:0
0xa71add c_parse_file()
        ???:0
0xae1149 c_common_parse_file()
        ???:0
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.
Compiler returned: 1
```

This behavior can be verified by visiting the CompilerExplorer: 
https://gcc.godbolt.org/z/8d8GGaPze

[Bug c/110575] gcc: internal compiler error: tree check: expected class 'type', have 'exceptional' (error_mark) in build_aligned_type

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110575

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-07-06
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.