bcm5719-llvm - Project Ortega BCM5719 LLVM

	Commit message (Collapse)	Author	Age	Files	Lines
*	Loop predication expand both sides of the widened condition	Artur Pilipenko	2017-02-27	1	-5/+7
\| \| \| \| \| \| \| \| \| \| \| \|	This is a fix for a loop predication bug which resulted in malformed IR generation. Loop invariant side of the widened condition is not guaranteed to be available in the preheader as is, so we need to expand it as well. See added unsigned_loop_0_to_n_hoist_length test for example. Reviewed By: sanjoy, mkazantsev Differential Revision: https://reviews.llvm.org/D30099 llvm-svn: 296345
*	[LoopPredication] Add a new line to debug output in LoopPredication pass	Artur Pilipenko	2017-02-01	1	-1/+1
\| \| \| \|	llvm-svn: 293762
*	[Guards] Introduce loop-predication pass	Artur Pilipenko	2017-01-25	1	-0/+280
	This patch introduces guard based loop predication optimization. The new LoopPredication pass tries to convert loop variant range checks to loop invariant by widening checks across loop iterations. For example, it will convert for (i = 0; i < n; i++) { guard(i < len); ... } to for (i = 0; i < n; i++) { guard(n - 1 < len); ... } After this transformation the condition of the guard is loop invariant, so loop-unswitch can later unswitch the loop by this condition which basically predicates the loop by the widened condition: if (n - 1 < len) for (i = 0; i < n; i++) { ... } else deoptimize This patch relies on an NFC change to make ScalarEvolution::isMonotonicPredicate public (revision 293062). Reviewed By: sanjoy Differential Revision: https://reviews.llvm.org/D29034 llvm-svn: 293064