On Tue, Jul 26, 2011 at 10:21:11PM +0200, Uros Bizjak wrote:
> This also works, we look at orig_x that looks like:
>
> (mem/u/c:SI (const:DI (unspec:DI [
> (symbol_ref:SI ("__sflush") [flags 0x41]
> <function_decl 0x7f6f2eaad000 __sflush>)
> ] UNSPEC_GOTPCREL)) [2 S4 A8])
>
> So, we look at SImode load, and compare it with SImode (actually
> ptr_mode) symbol. Will your suggestion work with this RTX?
Then
if (GET_MODE (orig_x) != GET_MODE (x))
{
x = simplify_gen_subreg (GET_MODE (orig_x), x, GET_MODE (x), 0);
if (x == NULL_RTX)
return orig_x;
}
will work, orig_x is the above SImode MEM, x is (symbol_ref:SI ("__sflush")
[flags 0x41] <function_decl 0x7f6f2eaad000 __sflush>)
thus the modes are the same and no simplify_gen_subreg needs to be done, the
mode is already right.
Jakub
