function.c (locate_and_pad_parm): Record parameter alignment in stack_alignment_needed.

        * function.c (locate_and_pad_parm): Record parameter alignment in
        stack_alignment_needed.

From-SVN: r101732

gcc/ChangeLog

+2005-07-07  Richard Henderson  <rth@redhat.com>
+
+	* function.c (locate_and_pad_parm): Record parameter alignment in
+	stack_alignment_needed.
+
 2005-07-07  David Edelsohn  <edelsohn@gnu.org>
 
 	* config/rs6000/rs6000.md (UNSPEC_SYNC, UNSPEC_SYNC_OP,

gcc/function.c

@@ -3256,7 +3256,7 @@ locate_and_pad_parm (enum machine_mode passed_mode, tree type, int in_regs,
 {
   tree sizetree;
   enum direction where_pad;
-  int boundary;
+  unsigned int boundary;
   int reg_parm_stack_space = 0;
   int part_size_in_regs;
 
@@ -3291,6 +3291,13 @@ locate_and_pad_parm (enum machine_mode passed_mode, tree type, int in_regs,
   locate->where_pad = where_pad;
   locate->boundary = boundary;
 
+  /* Remember if the outgoing parameter requires extra alignment on the
+     calling function side.  */
+  if (boundary > PREFERRED_STACK_BOUNDARY)
+    boundary = PREFERRED_STACK_BOUNDARY;
+  if (cfun->stack_alignment_needed < boundary)
+    cfun->stack_alignment_needed = boundary;
+
 #ifdef ARGS_GROW_DOWNWARD
   locate->slot_offset.constant = -initial_offset_ptr->constant;
   if (initial_offset_ptr->var)