[gomp4, 19/23] Allow pseudo reg function args

[Bernd Schmidt]

On ptx, we'll be using pseudos to pass function args as well, and
there's one assert that needs to be toned town to make that work.

	gcc/
	* expr.c (use_reg_mode): Just return for pseudo registers.

------------------------------------------------------------------------
Index: gcc/expr.c
===================================================================
--- gcc/expr.c	(revision 422421)
+++ gcc/expr.c	(revision 422422)
@@ -2321,7 +2321,10 @@ copy_blkmode_to_reg (enum machine_mode m
 void
 use_reg_mode (rtx *call_fusage, rtx reg, enum machine_mode mode)
 {
-  gcc_assert (REG_P (reg) && REGNO (reg) < FIRST_PSEUDO_REGISTER);
+  gcc_assert (REG_P (reg));
+
+  if (!HARD_REGISTER_P (reg))
+    return;
 
   *call_fusage
     = gen_rtx_EXPR_LIST (mode, gen_rtx_USE (VOIDmode, reg), *call_fusage);