output.h: Add declaration of final_forward_branch_p.

	* output.h: Add declaration of final_forward_branch_p.

	* config/i386/i386.c (output_fix_trunc): Remove unused variable.

From-SVN: r43876

gcc/config/i386/i386.c

@@ -784,7 +784,7 @@ override_options ()
      ix86_regparm = REGPARM_MAX;
 
   /* If the user has provided any of the -malign-* options,
-     warn and use that value only if -falign-* is not set.  
+     warn and use that value only if -falign-* is not set.
      Remove this code in GCC 3.2 or later.  */
   if (ix86_align_loops_string)
     {
@@ -1204,7 +1204,7 @@ function_arg_advance (cum, mode, type, named)
 	  cum->sse_regno = 0;
 	}
     }
-  else         
+  else
     {
       cum->words += words;
       cum->nregs -= words;
@@ -1264,7 +1264,7 @@ function_arg (cum, mode, type, named)
     case TImode:
       if (cum->sse_nregs)
         ret = gen_rtx_REG (mode, cum->sse_regno);
-      break;    
+      break;
     }
 
   if (TARGET_DEBUG_ARG)
@@ -2273,7 +2273,7 @@ ix86_frame_pointer_required ()
      to be able to access the saved ebp value in our frame.  */
   if (cfun->machine->accesses_prev_frame)
     return 1;
-  
+
   /* Several x86 os'es need a frame pointer for other reasons,
      usually pertaining to setjmp.  */
   if (SUBTARGET_FRAME_POINTER_REQUIRED)
@@ -2735,7 +2735,7 @@ ix86_expand_epilogue (style)
 
   ix86_compute_frame_layout (&frame);
 
-  /* Calculate start of saved registers relative to ebp.  Special care 
+  /* Calculate start of saved registers relative to ebp.  Special care
      must be taken for the normal return case of a function using
      eh_return: the eax and edx registers are marked as saved, but not
      restored along this path.  */
@@ -4224,7 +4224,7 @@ print_operand (file, x, code)
 
 	    if (!optimize || optimize_size || !TARGET_BRANCH_PREDICTION_HINTS)
 	      return;
-	    
+
 	    x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
 	    if (x)
 	      {
@@ -4752,7 +4752,7 @@ output_387_binary_op (insn, operands)
   return buf;
 }
 
-/* Output code to initialize control word copies used by 
+/* Output code to initialize control word copies used by
    trunc?f?i patterns.  NORMAL is set to current control word, while ROUND_DOWN
    is set to control word rounding downwards.  */
 void
@@ -4782,7 +4782,6 @@ output_fix_trunc (insn, operands)
 {
   int stack_top_dies = find_regno_note (insn, REG_DEAD, FIRST_STACK_REG) != 0;
   int dimode_p = GET_MODE (operands[0]) == DImode;
-  rtx xops[4];
 
   /* Jump through a hoop or two for DImode, since the hardware has no
      non-popping instruction.  We used to do this a different way, but
@@ -7565,7 +7564,7 @@ ix86_expand_movstr (dst, src, count_exp, align_exp)
          than 4 bytes, because gcc is able to optimize such code better (in
          the case the destination or the count really is aligned, gcc is often
          able to predict the branches) and also it is friendlier to the
-         hardware branch prediction.  
+         hardware branch prediction.
 
          Using loops is benefical for generic case, because we can
          handle small counts using the loops.  Many CPUs (such as Athlon)
@@ -8087,8 +8086,8 @@ ix86_expand_strlensi_unroll_1 (out, align_rtx)
        tmp = gen_rtx_EQ (VOIDmode, tmp, const0_rtx);
        emit_insn (gen_rtx_SET (VOIDmode, out,
 			       gen_rtx_IF_THEN_ELSE (Pmode, tmp,
-				       		     reg2,
-				       		     out)));
+						     reg2,
+						     out)));
 
     }
   else
@@ -10550,7 +10549,7 @@ ix86_secondary_memory_needed (class1, class2, mode, strict)
 	      && (mode) != SImode));
 }
 /* Return the cost of moving data from a register in class CLASS1 to
-   one in class CLASS2. 
+   one in class CLASS2.
 
    It is not required that the cost always equal 2 when FROM is the same as TO;
    on some machines it is expensive to move between registers if they are not
@@ -10621,8 +10620,8 @@ ix86_hard_regno_mode_ok (regno, mode)
 
    If moving between registers and memory is more expensive than
    between two registers, you should define this macro to express the
-   relative cost.  
- 
+   relative cost.
+
    Model also increased moving costs of QImode registers in non
    Q_REGS classes.
  */

gcc/output.h

 /* Declarations for insn-output.c.  These functions are defined in recog.c,
    final.c, and varasm.c.
    Copyright (C) 1987, 1991, 1994, 1997, 1998,
-   1999, 2000 Free Software Foundation, Inc.
+   1999, 2000, 2001 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 
@@ -35,7 +35,7 @@ extern void app_enable		PARAMS ((void));
    Called from varasm.c before most kinds of output.  */
 extern void app_disable		PARAMS ((void));
 
-/* Return the number of slots filled in the current 
+/* Return the number of slots filled in the current
    delayed branch sequence (we don't count the insn needing the
    delay slot).   Zero if not in a delayed branch sequence.  */
 extern int dbr_sequence_length	PARAMS ((void));
@@ -116,6 +116,11 @@ extern void split_double	PARAMS ((rtx, rtx *, rtx *));
 /* Return nonzero if this function has no function calls.  */
 extern int leaf_function_p	PARAMS ((void));
 
+/* Return 1 if branch is an forward branch.
+   Uses insn_shuid array, so it works only in the final pass.  May be used by
+   output templates to add branch prediction hints, for example.  */
+extern int final_forward_branch_p PARAMS ((rtx));
+
 /* Return 1 if this function uses only the registers that can be
    safely renumbered.  */
 extern int only_leaf_regs_used	PARAMS ((void));