re PR target/35657 (Alignments of DFP types aren't consistent)

2008-03-27  H.J. Lu  <hongjiu.lu@intel.com>

	PR target/35657
	* config/i386/i386.c (ix86_function_arg_boundary): Align
	decimal floating point to its natural boundary.

From-SVN: r133649

gcc/ChangeLog

+2008-03-27  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/35657
+	* config/i386/i386.c (ix86_function_arg_boundary): Align
+	decimal floating point to its natural boundary.
+
 2008-03-27  Richard Guenther  <rguenther@suse.de>
 
 	PR middle-end/35716

gcc/config/i386/i386.c

@@ -4577,7 +4577,8 @@ ix86_function_arg_boundary (enum machine_mode mode, tree type)
     align = GET_MODE_ALIGNMENT (mode);
   if (align < PARM_BOUNDARY)
     align = PARM_BOUNDARY;
-  if (!TARGET_64BIT)
+  /* Decimal floating point is aligned to its natural boundary.  */
+  if (!TARGET_64BIT && !VALID_DFP_MODE_P (mode))
     {
       /* i386 ABI defines all arguments to be 4 byte aligned.  We have to
 	 make an exception for SSE modes since these require 128bit