rs6000.c (struct rs6000_stack): Correct comments.

	* config/rs6000/rs6000.c (struct rs6000_stack): Correct comments.
	(rs6000_stack_info): Don't zero offsets when not saving registers.
	(debug_stack_info): Adjust to omit printing unused offsets,
	as before.
	(direct_return): Test vrsave_size rather than vrsave_mask.
	(rs6000_emit_prologue): Likewise.  Remove redundant altivec tests.
	(rs6000_emit_epilogue): Likewise.

From-SVN: r223425

gcc/ChangeLog

 2015-05-20  Alan Modra  <amodra@gmail.com>
 
+	* config/rs6000/rs6000.c (struct rs6000_stack): Correct comments.
+	(rs6000_stack_info): Don't zero offsets when not saving registers.
+	(debug_stack_info): Adjust to omit printing unused offsets,
+	as before.
+	(direct_return): Test vrsave_size rather than vrsave_mask.
+	(rs6000_emit_prologue): Likewise.  Remove redundant altivec tests.
+	(rs6000_emit_epilogue): Likewise.
+
+2015-05-20  Alan Modra  <amodra@gmail.com>
+
 	* config/rs6000/rs6000.c (rs6000_stack_info): Don't zero offsets
 	when not saving registers.
 	(debug_stack_info): Adjust to omit printing unused offsets,

gcc/config/rs6000/rs6000.c

@@ -155,10 +155,9 @@ typedef struct rs6000_stack {
   int gp_size;			/* size of saved GP registers */
   int fp_size;			/* size of saved FP registers */
   int altivec_size;		/* size of saved AltiVec registers */
-  int cr_size;			/* size to hold CR if not in save_size */
-  int vrsave_size;		/* size to hold VRSAVE if not in save_size */
-  int altivec_padding_size;	/* size of altivec alignment padding if
-				   not in save_size */
+  int cr_size;			/* size to hold CR if not in fixed area */
+  int vrsave_size;		/* size to hold VRSAVE */
+  int altivec_padding_size;	/* size of altivec alignment padding */
   int spe_gp_size;		/* size of 64-bit GPR save size for SPE */
   int spe_padding_size;
   HOST_WIDE_INT total_size;	/* total bytes allocated for stack */
@@ -5206,7 +5205,7 @@ direct_return (void)
 	  && info->first_altivec_reg_save == LAST_ALTIVEC_REGNO + 1
 	  && ! info->lr_save_p
 	  && ! info->cr_save_p
-	  && info->vrsave_mask == 0
+	  && info->vrsave_size == 0
 	  && ! info->push_p)
 	return 1;
     }
@@ -23636,7 +23635,7 @@ rs6000_emit_prologue (void)
 	       || info->first_fp_reg_save < 64
 	       || info->first_gp_reg_save < 32
 	       || info->altivec_size != 0
-	       || info->vrsave_mask != 0
+	       || info->vrsave_size != 0
 	       || crtl->calls_eh_return)
 	ptr_regno = 12;
       else
@@ -24184,7 +24183,7 @@ rs6000_emit_prologue (void)
 
   /* Save AltiVec registers if needed.  Save here because the red zone does
      not always include AltiVec registers.  */
-  if (!WORLD_SAVE_P (info) && TARGET_ALTIVEC_ABI
+  if (!WORLD_SAVE_P (info)
       && info->altivec_size != 0 && (strategy & SAVE_INLINE_VRS) == 0)
     {
       int end_save = info->altivec_save_offset + info->altivec_size;
@@ -24220,7 +24219,7 @@ rs6000_emit_prologue (void)
 	  frame_off = ptr_off;
 	}
     }
-  else if (!WORLD_SAVE_P (info) && TARGET_ALTIVEC_ABI
+  else if (!WORLD_SAVE_P (info)
 	   && info->altivec_size != 0)
     {
       int i;
@@ -24262,9 +24261,7 @@ rs6000_emit_prologue (void)
      epilogue.  */
 
   if (!WORLD_SAVE_P (info)
-      && TARGET_ALTIVEC
-      && TARGET_ALTIVEC_VRSAVE
-      && info->vrsave_mask != 0)
+      && info->vrsave_size != 0)
     {
       rtx reg, vrsave;
       int offset;
@@ -24826,8 +24823,7 @@ rs6000_emit_epilogue (int sibcall)
 
   /* Restore AltiVec registers if we must do so before adjusting the
      stack.  */
-  if (TARGET_ALTIVEC_ABI
-      && info->altivec_size != 0
+  if (info->altivec_size != 0
       && (ALWAYS_RESTORE_ALTIVEC_BEFORE_POP
 	  || (DEFAULT_ABI != ABI_V4
 	      && offset_below_red_zone_p (info->altivec_save_offset))))
@@ -24914,9 +24910,7 @@ rs6000_emit_epilogue (int sibcall)
     }
 
   /* Restore VRSAVE if we must do so before adjusting the stack.  */
-  if (TARGET_ALTIVEC
-      && TARGET_ALTIVEC_VRSAVE
-      && info->vrsave_mask != 0
+  if (info->vrsave_size != 0
       && (ALWAYS_RESTORE_ALTIVEC_BEFORE_POP
 	  || (DEFAULT_ABI != ABI_V4
 	      && offset_below_red_zone_p (info->vrsave_save_offset))))
@@ -25010,7 +25004,6 @@ rs6000_emit_epilogue (int sibcall)
 
   /* Restore AltiVec registers if we have not done so already.  */
   if (!ALWAYS_RESTORE_ALTIVEC_BEFORE_POP
-      && TARGET_ALTIVEC_ABI
       && info->altivec_size != 0
       && (DEFAULT_ABI == ABI_V4
 	  || !offset_below_red_zone_p (info->altivec_save_offset)))
@@ -25118,9 +25111,7 @@ rs6000_emit_epilogue (int sibcall)
 
   /* Restore VRSAVE if we have not done so already.  */
   if (!ALWAYS_RESTORE_ALTIVEC_BEFORE_POP
-      && TARGET_ALTIVEC
-      && TARGET_ALTIVEC_VRSAVE
-      && info->vrsave_mask != 0
+      && info->vrsave_size != 0
       && (DEFAULT_ABI == ABI_V4
 	  || !offset_below_red_zone_p (info->vrsave_save_offset)))
     {