* config/bfin/bfin.c (np_check_regno, np_after_branch): New static

	* config/bfin/bfin.c (np_check_regno, np_after_branch): New static
	variables.
	(note_np_check_stores): New function.
	(harmless_null_pointer_p): New function.
	(trapping_loads_p): New args NP_REG and AFTER_NP_BRANCH.  Callers
	changed.  Take into account whether we're in the shadow of a condjump
	that tested NP_REG for NULL.
	Lose all code that tested for SEQUENCEs.
	(workaround_speculation): Avoid inserting NOPs for loads that are
	either always executed or a NULL pointer.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@151513 138bc75d-0d04-0410-961f-82ee72b054a4