* config/arm/arm.h (REGISTER_MOVE_COST, MEMORY_MOVE_COST): Remove.

[pf3gnuchains/gcc-fork.git] / gcc / combine-stack-adj.c

diff --git a/gcc/combine-stack-adj.c b/gcc/combine-stack-adj.c
index 96bfb3a..3cffd66 100644 (file)
--- a/gcc/combine-stack-adj.c
+++ b/gcc/combine-stack-adj.c
@@ -1,7 +1,7 @@
 /* Combine stack adjustments.
    Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997,
-   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
-   Free Software Foundation, Inc.
+   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+   2010 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -57,7 +57,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "basic-block.h"
 #include "df.h"
 #include "except.h"
-#include "toplev.h"
 #include "reload.h"
 #include "timevar.h"
 #include "tree-pass.h"
@@ -297,68 +296,28 @@ record_stack_refs (rtx *xp, void *data)
   return 0;
 }
 
-/* Adjust or create REG_FRAME_RELATED_EXPR note when merging a stack
-   adjustment into a frame related insn.  */
+/* If INSN has a REG_ARGS_SIZE note, move it to LAST.
+   AFTER is true iff LAST follows INSN in the instruction stream.  */
 
 static void
-adjust_frame_related_expr (rtx last_sp_set, rtx insn,
-                          HOST_WIDE_INT this_adjust)
+maybe_move_args_size_note (rtx last, rtx insn, bool after)
 {
-  rtx note = find_reg_note (last_sp_set, REG_FRAME_RELATED_EXPR, NULL_RTX);
-  rtx new_expr = NULL_RTX;
+  rtx note, last_note;
 
-  if (note == NULL_RTX && RTX_FRAME_RELATED_P (insn))
+  note = find_reg_note (insn, REG_ARGS_SIZE, NULL_RTX);
+  if (note == NULL)
     return;
 
-  if (note
-      && GET_CODE (XEXP (note, 0)) == SEQUENCE
-      && XVECLEN (XEXP (note, 0), 0) >= 2)
+  last_note = find_reg_note (last, REG_ARGS_SIZE, NULL_RTX);
+  if (last_note)
     {
-      rtx expr = XEXP (note, 0);
-      rtx last = XVECEXP (expr, 0, XVECLEN (expr, 0) - 1);
-      int i;
-
-      if (GET_CODE (last) == SET
-         && RTX_FRAME_RELATED_P (last) == RTX_FRAME_RELATED_P (insn)
-         && SET_DEST (last) == stack_pointer_rtx
-         && GET_CODE (SET_SRC (last)) == PLUS
-         && XEXP (SET_SRC (last), 0) == stack_pointer_rtx
-         && CONST_INT_P (XEXP (SET_SRC (last), 1)))
-       {
-         XEXP (SET_SRC (last), 1)
-           = GEN_INT (INTVAL (XEXP (SET_SRC (last), 1)) + this_adjust);
-         return;
-       }
-
-      new_expr = gen_rtx_SEQUENCE (VOIDmode,
-                                  rtvec_alloc (XVECLEN (expr, 0) + 1));
-      for (i = 0; i < XVECLEN (expr, 0); i++)
-       XVECEXP (new_expr, 0, i) = XVECEXP (expr, 0, i);
+      /* The ARGS_SIZE notes are *not* cumulative.  They represent an
+        absolute value, and the "most recent" note wins.  */
+      if (!after)
+        XEXP (last_note, 0) = XEXP (note, 0);
     }
   else
-    {
-      new_expr = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (2));
-      if (note)
-       XVECEXP (new_expr, 0, 0) = XEXP (note, 0);
-      else
-       {
-         rtx expr = copy_rtx (single_set_for_csa (last_sp_set));
-
-         XEXP (SET_SRC (expr), 1)
-           = GEN_INT (INTVAL (XEXP (SET_SRC (expr), 1)) - this_adjust);
-         RTX_FRAME_RELATED_P (expr) = 1;
-         XVECEXP (new_expr, 0, 0) = expr;
-       }
-    }
-
-  XVECEXP (new_expr, 0, XVECLEN (new_expr, 0) - 1)
-    = copy_rtx (single_set_for_csa (insn));
-  RTX_FRAME_RELATED_P (XVECEXP (new_expr, 0, XVECLEN (new_expr, 0) - 1))
-    = RTX_FRAME_RELATED_P (insn);
-  if (note)
-    XEXP (note, 0) = new_expr;
-  else
-    add_reg_note (last_sp_set, REG_FRAME_RELATED_EXPR, new_expr);
+    add_reg_note (last, REG_ARGS_SIZE, XEXP (note, 0));
 }
 
 /* Subroutine of combine_stack_adjustments, called for each basic block.  */
@@ -432,9 +391,8 @@ combine_stack_adjustments_for_block (basic_block bb)
                                                  last_sp_adjust + this_adjust,
                                                  this_adjust))
                    {
-                     if (RTX_FRAME_RELATED_P (last_sp_set))
-                       adjust_frame_related_expr (last_sp_set, insn,
-                                                  this_adjust);
+                     maybe_move_args_size_note (last_sp_set, insn, false);
+
                      /* It worked!  */
                      delete_insn (insn);
                      last_sp_adjust += this_adjust;
@@ -451,6 +409,8 @@ combine_stack_adjustments_for_block (basic_block bb)
                                                  last_sp_adjust + this_adjust,
                                                  -last_sp_adjust))
                    {
+                     maybe_move_args_size_note (insn, last_sp_set, true);
+
                      /* It worked!  */
                      delete_insn (last_sp_set);
                      last_sp_set = insn;
@@ -546,7 +506,7 @@ combine_stack_adjustments_for_block (basic_block bb)
 static bool
 gate_handle_stack_adjustments (void)
 {
-  return (optimize > 0);
+  return flag_combine_stack_adjustments;
 }
 
 static unsigned int
@@ -585,7 +545,6 @@ struct rtl_opt_pass pass_stack_adjustments =
   0,                                    /* properties_destroyed */
   0,                                    /* todo_flags_start */
   TODO_df_finish | TODO_verify_rtl_sharing |
-  TODO_dump_func |
   TODO_ggc_collect,                     /* todo_flags_finish */
  }
 };