* loop.c (scan_loop): Add USEs inside PARALLELs into dependencies

	of the movable.

	* toplev.c (rest_of_compilation): Allow new pseudoes for mode switching.

	* i386-protos.h (ix86_split_fp_branch): Update prototype.
	(ix86_fp_jump_nontrivial_p): New.
	* i386.md (fp_jcc_?): Update call of split_fp_branch;
	use ix86_fp_jump_nontrivial_p.
	* i386.c (ix86_fp_jump_nontrivial_p): New.
	(ix86_split_fp_branch): Accept code instead of rtx.
	(ix86_expand_compare): Expand comparison early in case
	doing so is resonably cheap.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@44019 138bc75d-0d04-0410-961f-82ee72b054a4