Do not fold -C*ABS<n> to ABS<-C*n> (i.e., do not move negative constants

inside ABS expression).
Obtained from:	Richard Guenther <rguenther@suse.de>
Approved by:	core

contrib/gcc/fold-const.c

@@ -5661,6 +5661,9 @@ extract_muldiv_1 (tree t, tree c, enum tree_code code, tree wide_type,
             }
           break;
         }
+      /* If the constant is negative, we cannot simplify this.  */
+      if (tree_int_cst_sgn (c) == -1)
+	break;
       /* FALLTHROUGH */
     case NEGATE_EXPR:
       if ((t1 = extract_muldiv (op0, c, code, wide_type, strict_overflow_p))