gcc-pr24653.patch

   1 --- gcc/gcc/tree-ssa-ccp.c      (revision 106422)
   2 +++ gcc/gcc/tree-ssa-ccp.c      (working copy)
   3 @@ -853,6 +853,10 @@ ccp_fold (tree stmt)
   4             op0 = get_value (op0, true)->value;
   5         }
   6
   7 +      if ((code == NOP_EXPR || code == CONVERT_EXPR)
   8 +         && tree_ssa_useless_type_conversion_1 (TREE_TYPE (rhs),
   9 +                                                TREE_TYPE (op0)))
  10 +       return op0;
  11        return fold_unary (code, TREE_TYPE (rhs), op0);
  12      }
  13
  14