PR 31567

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

diff --git a/gcc/expr.c b/gcc/expr.c
index ff3867e..cd530d0 100644 (file)
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -151,7 +151,7 @@ static int is_aligning_offset (const_tree, const_tree);
 static void expand_operands (tree, tree, rtx, rtx*, rtx*,
                             enum expand_modifier);
 static rtx reduce_to_bit_field_precision (rtx, rtx, tree);
-static rtx do_store_flag (tree, rtx, enum machine_mode, int);
+static rtx do_store_flag (tree, rtx, enum machine_mode);
 #ifdef PUSH_ROUNDING
 static void emit_single_push_insn (enum machine_mode, rtx, tree);
 #endif
@@ -234,7 +234,6 @@ enum insn_code sync_new_and_optab[NUM_MACHINE_MODES];
 enum insn_code sync_new_xor_optab[NUM_MACHINE_MODES];
 enum insn_code sync_new_nand_optab[NUM_MACHINE_MODES];
 enum insn_code sync_compare_and_swap[NUM_MACHINE_MODES];
-enum insn_code sync_compare_and_swap_cc[NUM_MACHINE_MODES];
 enum insn_code sync_lock_test_and_set[NUM_MACHINE_MODES];
 enum insn_code sync_lock_release[NUM_MACHINE_MODES];
 
@@ -588,27 +587,9 @@ convert_move (rtx to, rtx from, int unsignedp)
       if (unsignedp)
        fill_value = const0_rtx;
       else
-       {
-#ifdef HAVE_slt
-         if (HAVE_slt
-             && insn_data[(int) CODE_FOR_slt].operand[0].mode == word_mode
-             && STORE_FLAG_VALUE == -1)
-           {
-             emit_cmp_insn (lowfrom, const0_rtx, NE, NULL_RTX,
-                            lowpart_mode, 0);
-             fill_value = gen_reg_rtx (word_mode);
-             emit_insn (gen_slt (fill_value));
-           }
-         else
-#endif
-           {
-             fill_value
-               = expand_shift (RSHIFT_EXPR, lowpart_mode, lowfrom,
-                               size_int (GET_MODE_BITSIZE (lowpart_mode) - 1),
-                               NULL_RTX, 0);
-             fill_value = convert_to_mode (word_mode, fill_value, 1);
-           }
-       }
+       fill_value = emit_store_flag (gen_reg_rtx (word_mode),
+                                     LT, lowfrom, const0_rtx,
+                                     VOIDmode, 0, -1);
 
       /* Fill the remaining words.  */
       for (i = GET_MODE_SIZE (lowpart_mode) / UNITS_PER_WORD; i < nwords; i++)
@@ -9042,7 +9023,7 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
     case LTGT_EXPR:
       temp = do_store_flag (exp,
                            modifier != EXPAND_STACK_PARM ? target : NULL_RTX,
-                           tmode != VOIDmode ? tmode : mode, 0);
+                           tmode != VOIDmode ? tmode : mode);
       if (temp != 0)
        return temp;
 
@@ -9697,9 +9678,6 @@ string_constant (tree arg, tree *ptr_offset)
 
    If TARGET is nonzero, store the result there if convenient.
 
-   If ONLY_CHEAP is nonzero, only do this if it is likely to be very
-   cheap.
-
    Return zero if there is no suitable set-flag instruction
    available on this machine.
 
@@ -9712,7 +9690,7 @@ string_constant (tree arg, tree *ptr_offset)
    set/jump/set sequence.  */
 
 static rtx
-do_store_flag (tree exp, rtx target, enum machine_mode mode, int only_cheap)
+do_store_flag (tree exp, rtx target, enum machine_mode mode)
 {
   enum rtx_code code;
   tree arg0, arg1, type;
@@ -9721,7 +9699,6 @@ do_store_flag (tree exp, rtx target, enum machine_mode mode, int only_cheap)
   int invert = 0;
   int unsignedp;
   rtx op0, op1;
-  enum insn_code icode;
   rtx subtarget = target;
   rtx result, label;
 
@@ -9865,37 +9842,6 @@ do_store_flag (tree exp, rtx target, enum machine_mode mode, int only_cheap)
   if (! can_compare_p (code, operand_mode, ccp_store_flag))
     return 0;
 
-  icode = setcc_gen_code[(int) code];
-
-  if (icode == CODE_FOR_nothing)
-    {
-      enum machine_mode wmode;
-
-      for (wmode = operand_mode;
-          icode == CODE_FOR_nothing && wmode != VOIDmode;
-          wmode = GET_MODE_WIDER_MODE (wmode))
-       icode = optab_handler (cstore_optab, wmode)->insn_code;
-    }
-
-  if (icode == CODE_FOR_nothing
-      || (only_cheap && insn_data[(int) icode].operand[0].mode != mode))
-    {
-      /* We can only do this if it is one of the special cases that
-        can be handled without an scc insn.  */
-      if ((code == LT && integer_zerop (arg1))
-         || (! only_cheap && code == GE && integer_zerop (arg1)))
-       ;
-      else if (! only_cheap && (code == NE || code == EQ)
-              && TREE_CODE (type) != REAL_TYPE
-              && ((optab_handler (abs_optab, operand_mode)->insn_code
-                   != CODE_FOR_nothing)
-                  || (optab_handler (ffs_optab, operand_mode)->insn_code
-                      != CODE_FOR_nothing)))
-       ;
-      else
-       return 0;
-    }
-
   if (! get_subtarget (target)
       || GET_MODE (subtarget) != operand_mode)
     subtarget = 0;