calls.c (expand_call): Don't use callgraph to increase preferred_stack_boundary.

2008-05-09  H.J. Lu  <hongjiu.lu@intel.com>

	* calls.c (expand_call): Don't use callgraph to increase
	preferred_stack_boundary.

	* cgraph.h (cgraph_rtl_info): Use unsigned on
	preferred_incoming_stack_boundary.

	* final.c (rest_of_clean_state): Use unsigned on
	preferred_stack_boundary.

From-SVN: r135134

gcc/ChangeLog

+2008-05-09  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* calls.c (expand_call): Don't use callgraph to increase
+	preferred_stack_boundary.
+
+	* cgraph.h (cgraph_rtl_info): Use unsigned on
+	preferred_incoming_stack_boundary.
+
+	* final.c (rest_of_clean_state): Use unsigned on
+	preferred_stack_boundary.
+
 2008-05-09  Tom Tromey  <tromey@redhat.com>
 
 	PR preprocessor/22231:

gcc/calls.c

@@ -2109,7 +2109,14 @@ expand_call (tree exp, rtx target, int ignore)
   if (fndecl)
     {
       struct cgraph_rtl_info *i = cgraph_rtl_info (fndecl);
-      if (i && i->preferred_incoming_stack_boundary)
+      /* Without automatic stack alignment, we can't increase preferred
+	 stack boundary.  With automatic stack alignment, it is
+	 unnecessary since unless we can guarantee that all callers will
+	 align the outgoing stack properly, callee has to align its
+	 stack anyway.  */
+      if (i
+	  && i->preferred_incoming_stack_boundary
+	  && i->preferred_incoming_stack_boundary < preferred_stack_boundary)
 	preferred_stack_boundary = i->preferred_incoming_stack_boundary;
     }
 

gcc/cgraph.h

@@ -118,7 +118,7 @@ struct cgraph_global_info GTY(())
 
 struct cgraph_rtl_info GTY(())
 {
-   int preferred_incoming_stack_boundary;
+   unsigned int preferred_incoming_stack_boundary;
 };
 
 /* The cgraph data structure.

gcc/final.c

@@ -4239,7 +4239,7 @@ rest_of_clean_state (void)
 
   if (targetm.binds_local_p (current_function_decl))
     {
-      int pref = crtl->preferred_stack_boundary;
+      unsigned int pref = crtl->preferred_stack_boundary;
       if (crtl->stack_alignment_needed > crtl->preferred_stack_boundary)
         pref = crtl->stack_alignment_needed;
       cgraph_rtl_info (current_function_decl)->preferred_incoming_stack_boundary