🚀 go-pugleaf

In trying to get to the bits of a floating point constant under GCC, I have
come up with casting it to the union of an unsigned and a float:

	((union {unsigned u; float f;}) (float) 3.1).u

This mercifully resolves to an immediate constant when compiled -O.
Unfortunately, the corresponding double cast:

	((union {unsigned u; double d;}) (double) 3.1).u

invariably results in the generation of four instructions to load both
parts of the double in a pair of registers, whether or not the second part
of the double is ever used.

In the best of all worlds, I would prefer that an immediate constant be
generated, but I would settle for just eliminating the useless load of the
second part of the double.  Could someone direct me on how to get GCC to do
this?

--Mario