emit-rtl.c (set_reg_attrs_for_parm): New function.

	* emit-rtl.c (set_reg_attrs_for_parm): New function.
	* rtl.h (set_reg_attrs_for_parm): New exported function.
	* function.c (assign_parms): Use set_reg_attrs_for_parm instead of
	set_reg_attrs_from_mem.

From-SVN: r63548

gcc/ChangeLog

+2003-02-28  Josef Zlomek  <zlomekj@suse.cz>
+
+	* emit-rtl.c (set_reg_attrs_for_parm): New function.
+	* rtl.h (set_reg_attrs_for_parm): New exported function.
+	* function.c (assign_parms): Use set_reg_attrs_for_parm instead of
+	set_reg_attrs_from_mem.
+
 2003-02-27  Roger Sayle  <roger@eyesopen.com>
 	    Zack Weinberg <zack@codesourcery.com>
 

gcc/emit-rtl.c

 /* Emit RTL for the GNU C-Compiler expander.
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -931,6 +931,32 @@ set_reg_attrs_from_mem (reg, mem)
       = get_reg_attrs (MEM_EXPR (mem), INTVAL (MEM_OFFSET (mem)));
 }
 
+/* Set the register attributes for registers contained in PARM_RTX.
+   Use needed values from memory attributes of MEM.  */
+
+void
+set_reg_attrs_for_parm (parm_rtx, mem)
+     rtx parm_rtx;
+     rtx mem;
+{
+  if (GET_CODE (parm_rtx) == REG)
+    set_reg_attrs_from_mem (parm_rtx, mem);
+  else if (GET_CODE (parm_rtx) == PARALLEL)
+    {
+      /* Check for a NULL entry in the first slot, used to indicate that the
+	 parameter goes both on the stack and in registers.  */
+      int i = XEXP (XVECEXP (parm_rtx, 0, 0), 0) ? 0 : 1;
+      for (; i < XVECLEN (parm_rtx, 0); i++)
+	{
+	  rtx x = XVECEXP (parm_rtx, 0, i);
+	  if (GET_CODE (XEXP (x, 0)) == REG)
+	    REG_ATTRS (XEXP (x, 0))
+	      = get_reg_attrs (MEM_EXPR (mem),
+			       INTVAL (XEXP (x, 1)));
+	}
+    }
+}
+
 /* Assign the RTX X to declaration T.  */
 void
 set_decl_rtl (t, x)

gcc/function.c

@@ -4460,7 +4460,7 @@ assign_parms (fndecl)
 
 	/* Set also REG_ATTRS if parameter was passed in a register.  */
 	if (entry_parm)
-	  set_reg_attrs_from_mem (entry_parm, stack_parm);
+	  set_reg_attrs_for_parm (entry_parm, stack_parm);
       }
 
       /* If this parameter was passed both in registers and in the stack,

gcc/rtl.h

@@ -1378,6 +1378,7 @@ extern rtx gen_int_mode			PARAMS ((HOST_WIDE_INT,
 extern rtx emit_copy_of_insn_after	PARAMS ((rtx, rtx));
 extern void set_reg_attrs_from_mem	PARAMS ((rtx, rtx));
 extern void set_mem_attrs_from_reg	PARAMS ((rtx, rtx));
+extern void set_reg_attrs_for_parm	PARAMS ((rtx, rtx));
 
 /* In rtl.c */
 extern rtx rtx_alloc			PARAMS ((RTX_CODE));