Michael Kuperstein 39c1e3d2d7 [LoopUnroll] Implement profile-based loop peeling ... This implements PGO-driven loop peeling. The basic idea is that when the average dynamic trip-count of a loop is known, based on PGO, to be low, we can expect a performance win by peeling off the first several iterations of that loop. Unlike unrolling based on a known trip count, or a trip count multiple, this doesn't save us the conditional check and branch on each iteration. However, it does allow us to simplify the straight-line code we get (constant-folding, etc.). This is important given that we know that we will usually only hit this code, and not the actual loop. This is currently disabled by default. Differential Revision: https://reviews.llvm.org/D25963 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@288274 91177308-0d34-0410-b5e6-96231b3b80d8		2016-11-30 21:13:57 +00:00
..
AArch64	Reapply "[LoopUnroll] Use the upper bound of the loop trip count to fullly unroll a loop"	2016-10-12 21:29:38 +00:00
AMDGPU	AMDGPU: Remove some old intrinsic uses from tests	2016-02-11 06:02:01 +00:00
PowerPC	[LoopUnroll] Fix a PowerPC test broken by r277524.	2016-08-02 21:43:25 +00:00
X86	Adds the ability to use an epilog remainder loop during loop unrolling and makes	2016-04-05 12:19:35 +00:00
2004-05-13-DontUnrollTooMuch.ll
2005-03-06-BadLoopInfoUpdate.ll
2006-08-24-MultiBlockLoop.ll
2007-04-16-PhiUpdate.ll
2007-05-05-UnrollMiscomp.ll
2007-05-09-UnknownTripCount.ll
2007-11-05-Crash.ll
2011-08-08-PhiUpdate.ll
2011-08-09-IVSimplify.ll
2011-08-09-PhiUpdate.ll
2011-10-01-NoopTrunc.ll
2012-04-09-unroll-indirectbr.ll
basic.ll
convergent.ll	[LoopUnroll] Respect the convergent attribute.	2016-03-14 23:15:34 +00:00
ephemeral.ll
full-unroll-bad-cost.ll
full-unroll-crashers.ll	[LoopUnrollAnalyzer] Fix a bug in UnrolledInstAnalyzer::visitLoad.	2016-06-23 14:31:31 +00:00
full-unroll-heuristics-2.ll	[LoopUnrollAnalyzer] Take into account cost of instructions controlling branches, along with their operands.	2016-05-18 21:20:12 +00:00
full-unroll-heuristics-cmp.ll	[LoopUnrollAnalyzer] Don't treat gep-instructions with simplified offset as simplified.	2016-05-13 01:42:34 +00:00
full-unroll-heuristics-dce.ll	Revert "Revert "[Unroll] Implement a conservative and monotonically increasing cost tracking system during the full unroll heuristic analysis that avoids counting any instruction cost until that instruction becomes "live" through a side-effect or use outside the...""	2016-05-13 21:23:25 +00:00
full-unroll-heuristics-geps.ll	Revert "Revert "[Unroll] Implement a conservative and monotonically increasing cost tracking system during the full unroll heuristic analysis that avoids counting any instruction cost until that instruction becomes "live" through a side-effect or use outside the...""	2016-05-13 21:23:25 +00:00
full-unroll-heuristics-phi-prop.ll	[Unroll] Improve the brute force loop unroll estimate by propagating	2015-08-03 20:32:27 +00:00
full-unroll-heuristics.ll
full-unroll-keep-first-exit.ll	[LoopUnroll] Keep the loop test only on the first iteration of max-or-zero loops	2016-10-21 11:08:48 +00:00
high-cost-trip-count-computation.ll	Adds the ability to use an epilog remainder loop during loop unrolling and makes	2016-04-05 12:19:35 +00:00
ignore-annotation-intrinsic-cost.ll
loop-remarks-with-hotness.ll	[LoopUnroll] Include hotness of region in opt remark	2016-07-29 19:29:47 +00:00
loop-remarks.ll
partial-unroll-const-bounds.ll	The patch refactors unroll pass.	2016-05-27 23:15:06 +00:00
peel-loop-pgo.ll	[LoopUnroll] Implement profile-based loop peeling	2016-11-30 21:13:57 +00:00
peel-loop.ll	[LoopUnroll] Implement profile-based loop peeling	2016-11-30 21:13:57 +00:00
pr10813.ll
pr11361.ll
pr14167.ll
pr18861.ll	[Tests] Add one more case to LoopUnroll/pr18861.ll for better coverage.	2015-10-02 19:21:52 +00:00
pr27157.ll	[LoopUnroll] Fix the way we update DT after complete unrolling.	2016-04-06 21:47:12 +00:00
pr28132.ll	[LoopUnroll] Don't crash trying to unroll loop with EH pad exit	2016-06-15 00:19:56 +00:00
rebuild_lcssa.ll	[LoopSimplify] When simplifying phis in loop-simplify, do it only if it preserves LCSSA form.	2016-09-27 21:03:45 +00:00
runtime-loop1.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
runtime-loop2.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
runtime-loop3.ll
runtime-loop4.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
runtime-loop5.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
runtime-loop.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
scevunroll.ll	Revert "[IndVarSimplify] Rewrite loop exit values with their initial values from loop preheader"	2015-11-03 07:14:39 +00:00
shifted-tripcount.ll
tripcount-overflow.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
unloop.ll	[LoopUnroll] Include hotness of region in opt remark	2016-07-29 19:29:47 +00:00
unroll-cleanup.ll	[LoopUnroll] Switch the default value of -unroll-runtime-epilog back to its original value.	2016-08-02 21:24:14 +00:00
unroll-cleanuppad.ll	[LoopUnroll] Unroll loops which have exit blocks to EH pads	2016-05-03 03:57:40 +00:00
unroll-count.ll	The patch set unroll disable pragma when unroll	2016-06-08 20:21:24 +00:00
unroll-heuristics-pgo.ll	Use profile info to adjust loop unroll threshold.	2016-11-17 01:17:02 +00:00
unroll-opt-attribute.ll	Loop unroller: set thresholds for optsize and minsize functions to zero	2016-05-10 21:45:55 +00:00
unroll-pragmas-disabled.ll
unroll-pragmas.ll	Revert test change in r282894 as it's broken in some platforms.	2016-09-30 19:25:23 +00:00
update-loop-info-in-subloops.ll