(const_binop): Delete special case for mult by 3.

From-SVN: r2002

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 069c503cb23e5e31dc605f70f38098969b2324bc..b3564de4ad40e0ea0c160c6338f1eca1f371cf48 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1073,7 +1073,7 @@ const_binop (code, arg1, arg2)
          break;
 
        case MULT_EXPR:
-  /* Optimize simple cases.  */
+         /* Optimize simple cases.  */
          if (int1h == 0)
            {
              unsigned HOST_WIDE_INT temp;
@@ -1091,11 +1091,13 @@ const_binop (code, arg1, arg2)
                  int2h = int2h * 2 + (temp < int2l);
                  t = build_int_2 (temp, int2h);
                  goto got_it;
+#if 0 /* This code can lose carries.  */
                case 3:
                  temp = int2l + int2l + int2l;
                  int2h = int2h * 3 + (temp < int2l);
                  t = build_int_2 (temp, int2h);
                  goto got_it;
+#endif
                case 4:
                  temp = int2l + int2l;
                  int2h = int2h * 4 + ((temp < int2l) << 1);