* config/mips/t-iris6 (CRTSTUFF_T_CFLAGS): Add -Wno-error.

[pf3gnuchains/gcc-fork.git] / gcc / fold-const.c

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 85909a3..3787915 100644 (file)
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -4433,8 +4433,11 @@ extract_muldiv_1 (tree t, tree c, enum tree_code code, tree wide_type)
       if (code == MULT_EXPR
          || integer_zerop (const_binop (TRUNC_MOD_EXPR, op1, c, 0)))
        {
-         op1 = const_binop (code, convert (ctype, op1), convert (ctype, c), 0);
-         if (op1 == 0 || TREE_OVERFLOW (op1))
+         op1 = const_binop (code, convert (ctype, op1),
+                            convert (ctype, c), 0);
+         /* We allow the constant to overflow with wrapping semantics.  */
+         if (op1 == 0
+             || (TREE_OVERFLOW (op1) && ! flag_wrapv))
            break;
        }
       else