* function.c (thread_prologue_and_epilogue_insns): Avoid
	fallthru flag on edge to exit.

	* i386.md (trunc?fsi splitter): Conditionionize for non-sse.

	* flow.c (delete_noop_moves, propagate_block_delete_insn): Purge
	dead edges.

From-SVN: r45135