re PR target/43546 (ICE: in assign_stack_local_1, at function.c:353 with -mpreferred-stack-boundary=2 -msseregparm)

	PR target/43546
	* expr.c (compress_float_constant): If x is a hard register,
	extend into a pseudo and then move to x.

	* gcc.target/i386/pr43546.c: New test.

From-SVN: r207757