PATCH [2/n]: Prepare x32: Convert pointer to TLS symbol if needed

["H.J. Lu" <hongjiu.lu@intel.com>]

Hi,

Backend may promote pointers to Pmode.  Before we force a TLS symbol
to a pseudo, we may need to convert it to proper mode.  OK for trunk?

Thanks.


H.J.
----
2011-06-11  H.J. Lu  <hongjiu.lu@intel.com>

	* calls.c (precompute_register_parameters): Convert pointer to
	TLS symbol if needed.

diff --git a/gcc/calls.c b/gcc/calls.c
index feb98d2..de98267 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -706,7 +706,13 @@ precompute_register_parameters (int num_actuals, struct arg_data *args,
 	   pseudo now.  TLS symbols sometimes need a call to resolve.  */
 	if (CONSTANT_P (args[i].value)
 	    && !targetm.legitimate_constant_p (args[i].mode, args[i].value))
-	  args[i].value = force_reg (args[i].mode, args[i].value);
+	  {
+	    if (GET_MODE (args[i].value) != args[i].mode)
+	      args[i].value = convert_to_mode (args[i].mode,
+					       args[i].value,
+					       args[i].unsignedp);
+	    args[i].value = force_reg (args[i].mode, args[i].value);
+	  }
 
 	/* If we are to promote the function arg to a wider mode,
 	   do it now.  */