[Bug middle-end/122860] [13/14/15/16 Regression] ICE: in expand_expr_addr_expr_1, at expr.cc

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122860

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org
   Last reconfirmed|                            |2025-12-01
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
           Keywords|inline-asm                  |

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This isn't related to inline-asm at all,
void
foo ()
{
  register unsigned long val asm ("eax") = (unsigned long) &val;
}
ICEs as well C++ (and is rejected in C
pr122860.C: In function ‘foo’:
pr122860.C:4:3: error: address of register variable ‘val’ requested
    4 |   register unsigned long val asm ("eax") = (unsigned long) &val;
      |   ^~~~~~~~
).
While
void
bar ()
{
  register unsigned long val asm ("eax") = 0;
  unsigned long p = (unsigned long) &val;
}
is properly rejected even in C++:
pr122860-2.C: In function ‘void bar()’:
pr122860-2.C:5:38: error: address of explicit register variable ‘val’ requested
    5 |   unsigned long p = (unsigned long) &val;
      |                                      ^~~