[Bug other/102605] New: address instruction from -fdump-tree-*-gimple doesn't work with -fgimple

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102605

            Bug ID: 102605
           Summary: address instruction from -fdump-tree-*-gimple doesn't
                    work with -fgimple
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: aldyh at gcc dot gnu.org
            Blocks: 101057
  Target Milestone: ---

The following snippet:

$ cat y.c
void bar();

char global[10];

void foo(char *p)
{
  if (&global[2] == p)
    bar();
}

...when converted to GIMPLE:

$ ./cc1 y.c -fdump-tree-ssa-gimple -quiet
$ cat y.c.022t.ssa 
void __GIMPLE (ssa)
foo (char * p)
{
  __BB(2):
  if (p_2(D) == &global[2])
    goto __BB3;
  else
    goto __BB4;

  __BB(3):
  bar ();
  goto __BB4;

  __BB(4):
  return;

}

Does not compile with -fgimple:

$ mv y.c.022t.ssa z.c

$ ./cc1 z.c -fgimple -quiet
z.c: In function ‘foo’:
z.c:5:17: error: expected expression before ‘&’ token
    5 |   if (p_2(D) == &global[2])
      |                 ^
z.c: At top level:
z.c:5:27: error: expected identifier or ‘(’ before ‘)’ token
    5 |   if (p_2(D) == &global[2])
      |                           ^
z.c:7:3: error: expected identifier or ‘(’ before ‘else’
    7 |   else
      |   ^~~~
z.c:10:8: error: expected declaration specifiers or ‘...’ before numeric
constant
   10 |   __BB(3):
      |        ^
z.c:12:3: error: expected identifier or ‘(’ before ‘goto’
   12 |   goto __BB4;
      |   ^~~~
z.c:14:8: error: expected declaration specifiers or ‘...’ before numeric
constant
   14 |   __BB(4):
      |        ^
z.c:17:1: error: expected identifier or ‘(’ before ‘}’ token
   17 | }
      | ^

Is the output from -fdump-tree-*-gimple suppose to be compilable by -fgimple? 
If not, what is the appropriate way of representing &global[2] in the gimple
FE?


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101057
[Bug 101057] [gimplefe] GIMPLE frontend issues