i386.h (BIGGEST_FIELD_ALIGNMENT): Set proper default for x86_64.

	* i386.h (BIGGEST_FIELD_ALIGNMENT): Set proper default for x86_64.

	* i386.c (overwrite_options): Set -mpreferred-stack-boundary to 128
	for -Os/TARGET_64BIT too.

From-SVN: r57399

gcc/ChangeLog

+Tue Aug 27 22:26:35 CEST 2002  Jan Hubicka  <jh@suse.cz>
+
+	* i386.h (BIGGEST_FIELD_ALIGNMENT): Set proper default for x86_64.
+
+Tue Aug 27 20:07:01 CEST 2002  Jan Hubicka  <jh@suse.cz>
+
+	* i386.c (overwrite_options): Set -mpreferred-stack-boundary to 128
+	for -Os/TARGET_64BIT too.
+
 2002-09-21  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* ChangeLog: Follow spelling conventions.

gcc/config/i386/i386.c

@@ -1120,14 +1120,14 @@ override_options ()
      don't want additional code to keep the stack aligned when
      optimizing for code size.  */
   ix86_preferred_stack_boundary = (optimize_size
-				   ? TARGET_64BIT ? 64 : 32
+				   ? TARGET_64BIT ? 128 : 32
 				   : 128);
   if (ix86_preferred_stack_boundary_string)
     {
       i = atoi (ix86_preferred_stack_boundary_string);
-      if (i < (TARGET_64BIT ? 3 : 2) || i > 12)
+      if (i < (TARGET_64BIT ? 4 : 2) || i > 12)
 	error ("-mpreferred-stack-boundary=%d is not between %d and 12", i,
-	       TARGET_64BIT ? 3 : 2);
+	       TARGET_64BIT ? 4 : 2);
       else
 	ix86_preferred_stack_boundary = (1 << i) * BITS_PER_UNIT;
     }

gcc/config/i386/i386.h

@@ -729,7 +729,11 @@ extern int x86_prefetch_sse;
    supports no vector modes, cut out the complexity and fall back
    on BIGGEST_FIELD_ALIGNMENT.  */
 #ifdef IN_TARGET_LIBS
+#ifdef __x86_64__
+#define BIGGEST_FIELD_ALIGNMENT 128
+#else
 #define BIGGEST_FIELD_ALIGNMENT 32
+#endif
 #else
 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
    x86_field_alignment (FIELD, COMPUTED)