2010-04-09 Manuel López-Ibáñez <manu@gcc.gnu.org>

[pf3gnuchains/gcc-fork.git] / gcc / optabs.c

diff --git a/gcc/optabs.c b/gcc/optabs.c
index 9e659dc..555e256 100644 (file)
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -1,6 +1,6 @@
 /* Expand the basic unary and binary arithmetic operations, for GNU compiler.
    Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
-   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+   1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
    Free Software Foundation, Inc.
 
 This file is part of GCC.
@@ -1127,7 +1127,7 @@ expand_doubleword_shift (enum machine_mode op1_mode, optab binoptab,
 
   NO_DEFER_POP;
   do_compare_rtx_and_jump (cmp1, cmp2, cmp_code, false, op1_mode,
-                          0, 0, subword_label);
+                          0, 0, subword_label, -1);
   OK_DEFER_POP;
 
   if (!expand_superword_shift (binoptab, outof_input, superword_op1,
@@ -1389,11 +1389,12 @@ static rtx
 avoid_expensive_constant (enum machine_mode mode, optab binoptab,
                          rtx x, bool unsignedp)
 {
+  bool speed = optimize_insn_for_speed_p ();
+
   if (mode != VOIDmode
       && optimize
       && CONSTANT_P (x)
-      && rtx_cost (x, binoptab->code, optimize_insn_for_speed_p ())
-                   > COSTS_N_INSNS (1))
+      && rtx_cost (x, binoptab->code, speed) > rtx_cost (x, SET, speed))
     {
       if (CONST_INT_P (x))
        {
@@ -1719,7 +1720,6 @@ expand_binop (enum machine_mode mode, optab binoptab, rtx op0, rtx op1,
     {
       int i;
       rtx insns;
-      rtx equiv_value;
 
       /* If TARGET is the same as one of the operands, the REG_EQUAL note
         won't be accurate, so use a new target.  */
@@ -1749,13 +1749,6 @@ expand_binop (enum machine_mode mode, optab binoptab, rtx op0, rtx op1,
 
       if (i == GET_MODE_BITSIZE (mode) / BITS_PER_WORD)
        {
-         if (binoptab->code != UNKNOWN)
-           equiv_value
-             = gen_rtx_fmt_ee (binoptab->code, mode,
-                               copy_rtx (op0), copy_rtx (op1));
-         else
-           equiv_value = 0;
-
          emit_insn (insns);
          return target;
        }
@@ -3477,7 +3470,7 @@ expand_abs (enum machine_mode mode, rtx op0, rtx target,
   NO_DEFER_POP;
 
   do_compare_rtx_and_jump (target, CONST0_RTX (mode), GE, 0, mode,
-                          NULL_RTX, NULL_RTX, op1);
+                          NULL_RTX, NULL_RTX, op1, -1);
 
   op0 = expand_unop (mode, result_unsignedp ? neg_optab : negv_optab,
                      target, target, 0);
@@ -3903,7 +3896,7 @@ void
 emit_libcall_block (rtx insns, rtx target, rtx result, rtx equiv)
 {
   rtx final_dest = target;
-  rtx prev, next, last, insn;
+  rtx next, last, insn;
 
   /* If this is a reg with REG_USERVAR_P set, then it could possibly turn
      into a MEM later.  Protect the libcall block from this change.  */
@@ -3980,10 +3973,7 @@ emit_libcall_block (rtx insns, rtx target, rtx result, rtx equiv)
        break;
     }
 
-  prev = get_last_insn ();
-
   /* Write the remaining insns followed by the final copy.  */
-
   for (insn = insns; insn; insn = next)
     {
       next = NEXT_INSN (insn);
@@ -6201,7 +6191,6 @@ void
 init_optabs (void)
 {
   unsigned int i;
-  enum machine_mode int_mode;
   static bool reinit;
 
   libfunc_hash = htab_create_ggc (10, hash_libfunc, eq_libfunc, NULL);
@@ -6657,11 +6646,8 @@ init_optabs (void)
   /* The ffs function operates on `int'.  Fall back on it if we do not
      have a libgcc2 function for that width.  */
   if (INT_TYPE_SIZE < BITS_PER_WORD)
-    {
-      int_mode = mode_for_size (INT_TYPE_SIZE, MODE_INT, 0);
-      set_optab_libfunc (ffs_optab, mode_for_size (INT_TYPE_SIZE, MODE_INT, 0),
-                        "ffs");
-    }
+    set_optab_libfunc (ffs_optab, mode_for_size (INT_TYPE_SIZE, MODE_INT, 0),
+                      "ffs");
 
   /* Explicitly initialize the bswap libfuncs since we need them to be
      valid for things other than word_mode.  */