Before the introduction of OP_SETFVAL, floating-point were created via OP_SETVAL whose CSE is done by comparing the pointer of the corresponding expression without any interpretation of this pointer. As consequence, even if two OP_SETVAL have two identical expressions (value), in most cases the corresponding pointers are not identical, completly inhibiting the CSE of OP_SETVALs. Fix the CSE of floating-point literals by directly using the value given by the new OP_SETFVAL. Note: to respect some of the subtilities of floating-point, the equality comparison of two literals is not done on the floating-point value itself but bit-by-bit on its binary representation (as such we can continue to make the distinction between +0.0 & -0.0, handle NaNs, ...). Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>