i386.c (ix86_can_use_return_insn_p): Check for padding0, too.

2009-09-09  Kai Tietz  <kai.tietz@onevision.com>

	PR/41315
	* config/i386.c (ix86_can_use_return_insn_p): Check for
	padding0, too.
	(ix86_expand_prologue): Take frame.padding0 into logic of
	to_allocate checks.
	(ix86_expand_epilogue): Likewise.

From-SVN: r151570

gcc/ChangeLog

+2009-09-09  Kai Tietz  <kai.tietz@onevision.com>
+
+	PR/41315
+	* config/i386.c (ix86_can_use_return_insn_p): Check for
+	padding0, too.
+	(ix86_expand_prologue): Take frame.padding0 into logic of
+	to_allocate checks.
+	(ix86_expand_epilogue): Likewise.
+
 2009-09-09  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/t-slibgcc-elf-ver (SHLIB_MAKE_SOLINK, SHLIB_INSTALL_SOLINK):

gcc/config/i386/i386.c

@@ -7441,7 +7441,8 @@ ix86_can_use_return_insn_p (void)
     return 0;
 
   ix86_compute_frame_layout (&frame);
-  return frame.to_allocate == 0 && (frame.nregs + frame.nsseregs) == 0;
+  return frame.to_allocate == 0 && frame.padding0 == 0
+         && (frame.nregs + frame.nsseregs) == 0;
 }
 
 /* Value should be nonzero if functions must have frame pointers.
@@ -8482,7 +8483,7 @@ ix86_expand_prologue (void)
          && (! TARGET_STACK_PROBE || allocate < CHECK_STACK_LIMIT)))
     {
       if (!frame_pointer_needed
-	  || !frame.to_allocate
+	  || !(frame.to_allocate + frame.padding0)
 	  || crtl->stack_realign_needed)
         ix86_emit_save_regs_using_mov (stack_pointer_rtx,
 				       frame.to_allocate
@@ -8492,7 +8493,7 @@ ix86_expand_prologue (void)
 				       -frame.nregs * UNITS_PER_WORD);
     }
   if (!frame_pointer_needed
-      || !frame.to_allocate
+      || !(frame.to_allocate + frame.padding0)
       || crtl->stack_realign_needed)
     ix86_emit_save_sse_regs_using_mov (stack_pointer_rtx,
 				       frame.to_allocate);
@@ -8804,9 +8805,10 @@ ix86_expand_epilogue (int style)
   if ((!sp_valid && (frame.nregs + frame.nsseregs) <= 1)
       || (TARGET_EPILOGUE_USING_MOVE
 	  && cfun->machine->use_fast_prologue_epilogue
-	  && ((frame.nregs + frame.nsseregs) > 1 || frame.to_allocate))
+	  && ((frame.nregs + frame.nsseregs) > 1
+	      || (frame.to_allocate + frame.padding0) != 0))
       || (frame_pointer_needed && !(frame.nregs + frame.nsseregs)
-	  && frame.to_allocate)
+	  && (frame.to_allocate + frame.padding0) != 0)
       || (frame_pointer_needed && TARGET_USE_LEAVE
 	  && cfun->machine->use_fast_prologue_epilogue
 	  && (frame.nregs + frame.nsseregs) == 1)
@@ -8822,7 +8824,7 @@ ix86_expand_epilogue (int style)
 	 be addressed by bp. sp must be used instead.  */
 
       if (!frame_pointer_needed
-	  || (sp_valid && !frame.to_allocate) 
+	  || (sp_valid && !(frame.to_allocate + frame.padding0)) 
 	  || stack_realign_fp)
 	{
 	  ix86_emit_restore_sse_regs_using_mov (stack_pointer_rtx,
@@ -8952,7 +8954,7 @@ ix86_expand_epilogue (int style)
 				     GEN_INT (frame.nsseregs * 16 + frame.padding0),
 				     style, false);
 	}
-      else if (frame.to_allocate || frame.nsseregs)
+      else if (frame.to_allocate || frame.padding0 || frame.nsseregs)
 	{
           ix86_emit_restore_sse_regs_using_mov (stack_pointer_rtx,
 						frame.to_allocate, red_offset,