[Bug middle-end/36791] New: ICE with constant argument to __builtin_eh_return

["jfc at mit dot edu" <gcc-bugzilla@gcc.gnu.org>]

This function causes an ICE in rtl generation:

void g()
{
  __builtin_eh_return(0, 0);
}

The crash happens when either operand to __builtin_eh_return is an integer
constant.  expand_builtin_eh_return calls copy_to_reg on a CONST_INT operand. 
copy_to_reg generates a register with mode VOIDmode.

I think the fix is to change the two calls to copy_to_reg to copy_addr_to_reg
in expand_builtin_eh_return.

This bug seems to be present for many versions and on at least two targets, x86
and SPARC.

Note that with optimization on the same crash may occur if a variable known to
hold an integer constant value is passed as the first argument.


-- 
           Summary: ICE with constant argument to __builtin_eh_return
           Product: gcc
           Version: 4.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jfc at mit dot edu
  GCC host triplet: x86_64-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36791