[Bug middle-end/113215] New: gimple FE can't handle static local variable with initializer

["acoplan at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113215

            Bug ID: 113215
           Summary: gimple FE can't handle static local variable with
                    initializer
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: acoplan at gcc dot gnu.org
  Target Milestone: ---

The following testcase is accepted:

int __GIMPLE (ssa)
f ()
{
    static int x;
    __BB(2):
    return 1;
}

but adding an initializer to the static variable, it gets rejected:

$ cat > t.c
int __GIMPLE (ssa)
f ()
{
    static int x = 1;
    __BB(2):
    return 1;
}
$ gcc/xgcc -B gcc -c -fgimple t.c
t.c: In function ‘f’:
t.c:4:18: error: expected ‘;’ before ‘=’ token
    4 |     static int x = 1;
      |                  ^
t.c: At top level:
t.c:5:10: error: expected declaration specifiers or ‘...’ before numeric
constant
    5 |     __BB(2):
      |          ^
t.c:7:1: error: expected identifier or ‘(’ before ‘}’ token
    7 | }
      | ^

such IL can be generated by dumping optimized GIMPLE as seen e.g. with the
following testcase:

$ cat t2.c
int f() {
  static int x = 1;
  return x;
}
$ gcc/xgcc -B gcc -c t2.c -fdump-tree-optimized-gimple=-
int __GIMPLE (ssa)
f ()
{
  static int x = 1;
  int D_4434;
  int _2;

  __BB(2):
  _2 = x;
  goto __BB3;

  __BB(3):
L0:
  return _2;

}