[Bug middle-end/49189] [4.7 regression] infinite recursion in constant folder

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49189

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-27 11:21:09 UTC ---
The old code did not re-fold in

      /* If we have (type) (a CMP b) and type is an integral type, return
         new expression involving the new type.  */
      if (COMPARISON_CLASS_P (op0) && INTEGRAL_TYPE_P (type))
        return fold_build2_loc (loc, TREE_CODE (op0), type, TREE_OPERAND (op0,
0),
                            TREE_OPERAND (op0, 1));

for BOOLEAN_TYPE.

It could be argued that re-folding is never necessary here because the
comparison does not depend on the type of the boolean result it produces.

So I'll disable re-folding here.