[Bug c/111810] New: GCC-14 segfault: error: expected declaration or statement at end of input

[Bug c/111810] New: GCC-14 segfault: error: expected declaration or statement at end of input

[141242068 at smail dot nju.edu.cn]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111810

            Bug ID: 111810
           Summary: GCC-14 segfault: error: expected declaration or
                    statement at end of input
           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: ---

When compile this program with `gcc-14 -O0`, gcc crashes:
```
void = {0};
void uninliner_1() {
  {}
inline __RTL test(void) {
  uninliner_1();
```

This crash can be verified at https://godbolt.org/z/rc9oW43EE

The full stack backtrace is pasted below:

<source>:1:6: error: expected identifier or '(' before '=' token
    1 | void = {0};
      |      ^
<source>: In function 'uninliner_1':
<source>:4:14: warning: return type defaults to 'int' [-Wimplicit-int]
    4 | inline __RTL test(void) {
      |              ^~~~
<source>: In function 'test':
<source>:5:3: error: no closing brace
    5 |   uninliner_1();
      |   ^~~~~~~~~~~
<source>: At top level:
<source>:5:3: error: expected declaration or statement at end of input
<source>:5:3: internal compiler error: Segmentation fault
0x22ff3ee internal_error(char const*, ...)
        ???:0
0xa2621e finish_function(unsigned int)
        ???:0
0xaa468d c_parse_file()
        ???:0
0xb17919 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

[Bug c/111810] rtlFE: nested inline RTL function cause ICE

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111810

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-11-04
             Status|UNCONFIRMED                 |NEW
            Summary|GCC-14 segfault: error:     |rtlFE: nested inline RTL
                   |expected declaration or     |function cause ICE
                   |statement at end of input   |
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Just like the gimple front-end, the RTL level front-end is for internal
testing.

Reduced testcase:
```
void j() {inline void __RTL test(void) {}}
```