bcm5719-llvm - Project Ortega BCM5719 LLVM

	Commit message (Collapse)	Author	Age	Files	Lines
*	[PPC/LoopUnrollRuntime] Don't avoid high-cost trip count computation on the ↵	Hal Finkel	2015-05-21	1	-0/+27
	PPC/A2 On X86 (and similar OOO cores) unrolling is very limited, and even if the runtime unrolling is otherwise profitable, the expense of a division to compute the trip count could greatly outweigh the benefits. On the A2, we unroll a lot, and the benefits of unrolling are more significant (seeing a 5x or 6x speedup is not uncommon), so we're more able to tolerate the expense, on average, of a division to compute the trip count. llvm-svn: 237947