Artur Pilipenko f5935363ed Rework loop predication pass ... We've found a serious issue with the current implementation of loop predication. The current implementation relies on SCEV and this turned out to be problematic. To fix the problem we had to rework the pass substantially. We have had the reworked implementation in our downstream tree for a while. This is the initial patch of the series of changes to upstream the new implementation. For now the transformation is limited to the following case: * The loop has a single latch with either ult or slt icmp condition. * The step of the IV used in the latch condition is 1. * The IV of the latch condition is the same as the post increment IV of the guard condition. * The guard condition is ult. See the review or the LoopPredication.cpp header for the details about the problem and the new implementation. Reviewed By: sanjoy, mkazantsev Differential Revision: https://reviews.llvm.org/D37569 llvm-svn: 313981		2017-09-22 13:13:57 +00:00
..
ADCE	[ADCE][Dominators] Reapply: Teach ADCE to preserve dominators	2017-08-22 16:30:21 +00:00
AddDiscriminators
AlignmentFromAssumptions
ArgumentPromotion	[ArgPromotion] Preserve alignment of byval argument in new alloca	2017-08-04 17:09:11 +00:00
AtomicExpand
BDCE	[BDCE] Don't check demanded bits on unsized types	2017-08-16 16:09:22 +00:00
BranchFolding
CodeExtractor
CodeGenPrepare	Unmerge GEPs to reduce register pressure on IndirectBr edges.	2017-09-11 17:52:08 +00:00
ConstantHoisting
ConstantMerge	Canonicalize the representation of empty an expression in DIGlobalVariableExpression	2017-08-30 18:06:51 +00:00
ConstProp
Coroutines	[coroutines] Add support for symmetric control transfer (musttail on coro.resumes followed by a suspend)	2017-08-25 02:25:10 +00:00
CorrelatedValuePropagation	[LVI] Constant-propagate a zero extension of the switch condition value through case edges	2017-08-03 21:11:30 +00:00
CountingFunctionInserter
CrossDSOCFI	[cfi] Build __cfi_check as Thumb when applicable.	2017-08-29 22:29:15 +00:00
DCE	Add strictfp attribute to prevent unwanted optimizations of libm calls	2017-08-14 21:15:13 +00:00
DeadArgElim	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
DeadStoreElimination	Revert r310055, it caused PR34074.	2017-08-04 20:40:38 +00:00
DivRemPairs	[DivRemPairs] split tests per target to account for bots that don't build for all targets	2017-09-09 14:10:59 +00:00
EarlyCSE
EliminateAvailableExternally
Float2Int
ForcedFunctionAttrs
FunctionAttrs	Merge isKnownNonNull into isKnownNonZero	2017-09-09 18:23:11 +00:00
FunctionImport	Fix bot failures by requiring x86 target	2017-08-19 19:15:04 +00:00
GCOVProfiling	Canonicalize the representation of empty an expression in DIGlobalVariableExpression	2017-08-30 18:06:51 +00:00
GlobalDCE
GlobalMerge	Canonicalize the representation of empty an expression in DIGlobalVariableExpression	2017-08-30 18:06:51 +00:00
GlobalOpt	Fixed reverted commit rL312318	2017-09-21 10:04:02 +00:00
GlobalSplit
GuardWidening
GVN	This patch fixes https://bugs.llvm.org/show_bug.cgi?id=32352	2017-09-15 20:10:09 +00:00
GVNHoist	[GVNHoist] Factor out reachability to search for anticipable instructions quickly	2017-09-13 05:28:03 +00:00
GVNSink
IndVarSimplify	[SCEV/IndVars] Always compute loop exiting values if the backedge count is 0	2017-08-01 22:37:58 +00:00
InferAddressSpaces
InferFunctionAttrs
Inline	Add llvm.codeview.annotation to implement MSVC __annotation	2017-09-05 20:14:58 +00:00
InstCombine	[InstCombine] Teach getDemandedBitsLHSMask to handle constant splat vectors	2017-09-20 23:48:58 +00:00
InstMerge
InstNamer
InstSimplify	[InstSimplify] fold sdiv/srem based on compare of dividend and divisor	2017-09-14 14:59:07 +00:00
InterleavedAccess	[Interleved][Stride 3]Adding test for case the VF=64 target with AVX512.	2017-09-11 10:57:15 +00:00
Internalize
IPConstantProp
IRCE	Revert "Re-enable "[IRCE] Identify loops with latch comparison against current IV value""	2017-09-21 04:50:41 +00:00
JumpThreading	Disable jump threading into loop headers	2017-09-06 19:36:58 +00:00
LCSSA
LICM	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
LoadStoreVectorizer
LoopDataPrefetch
LoopDeletion	[Dominators] Teach LoopDeletion to use the new incremental API	2017-08-02 18:17:52 +00:00
LoopDistribute
LoopIdiom	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
LoopInterchange	[LoopInterchange] Skip zext instructions when looking for induction var.	2017-08-25 16:52:29 +00:00
LoopLoadElim
LoopPredication	Rework loop predication pass	2017-09-22 13:13:57 +00:00
LoopReroll	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
LoopRotate	Parse and print DIExpressions inline to ease IR and MIR testing	2017-08-23 20:31:27 +00:00
LoopSimplify	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
LoopSimplifyCFG
LoopStrengthReduce	Revert r313343 "[X86] PR32755 : Improvement in CodeGen instruction selection for LEAs."	2017-09-15 18:40:26 +00:00
LoopUnroll	Tighten the invariants around LoopBase::invalidate	2017-09-20 02:31:57 +00:00
LoopUnswitch	[LoopUnswitch] Fix a simple bug which disables loop unswitch for select statement	2017-08-29 21:45:11 +00:00
LoopVectorize	[LV] Fix maximum legal VF calculation	2017-09-14 07:40:02 +00:00
LoopVersioning
LoopVersioningLICM
LowerAtomic	LowerAtomic: Don't skip optnone functions; atomic still need lowering (PR34020)	2017-08-23 15:43:28 +00:00
LowerExpectIntrinsic
LowerGuardIntrinsic
LowerInvoke
LowerSwitch
LowerTypeTests	LowerTypeTests: Add import/export support for targets without absolute symbol constants.	2017-09-11 22:49:10 +00:00
Mem2Reg	Re-land r313825: "[IR] Add llvm.dbg.addr, a control-dependent version of llvm.dbg.declare"	2017-09-21 19:52:03 +00:00
MemCpyOpt
MergeFunc	Parse and print DIExpressions inline to ease IR and MIR testing	2017-08-23 20:31:27 +00:00
MergeICmps	Reland rL312315: [MergeICmps] MergeICmps is a new optimization pass that turns chains of integer	2017-09-01 10:56:34 +00:00
MetaRenamer	[MetaRenamer] Leave @main alone.	2017-08-01 05:14:45 +00:00
NameAnonGlobals
NaryReassociate
NewGVN	NewGVN: Fix PR 34430 - we need to look through predicateinfo copies to detect self-cycles of phi nodes. We also need to not ignore certain types of arguments when testing whether the phi has a backedge or was originally constant.	2017-09-05 02:17:43 +00:00
ObjCARC	[ObjCARC] Pass the correct BasicBlock to fix assertion failure.	2017-08-31 18:27:47 +00:00
PartiallyInlineLibCalls
PGOProfile	[ThinLTO] Fix dead stripping analysis for SamplePGO	2017-09-20 17:09:47 +00:00
PhaseOrdering
PlaceSafepoints	All libcalls should be considered to be GC-leaf functions.	2017-07-27 16:49:39 +00:00
PreISelIntrinsicLowering
PruneEH
Reassociate	[Reassociate] Do not drop debug location if replacement is missing	2017-08-24 09:05:00 +00:00
Reg2Mem
RewriteStatepointsForGC	All libcalls should be considered to be GC-leaf functions.	2017-07-27 16:49:39 +00:00
SafeStack	Parse and print DIExpressions inline to ease IR and MIR testing	2017-08-23 20:31:27 +00:00
SampleProfile	Import all inlined indirect call targets for SamplePGO.	2017-09-19 21:18:14 +00:00
Scalarizer	Remove the obsolete offset parameter from @llvm.dbg.value	2017-07-28 20:21:02 +00:00
SCCP	[IPSCCP] Guard a user of getInitializer with hasDefinitiveInitializer	2017-07-31 17:47:07 +00:00
SeparateConstOffsetFromGEP
SimpleLoopUnswitch
SimplifyCFG	[SimplifyCFG] don't create a no-op subtract	2017-09-20 22:31:35 +00:00
Sink
SLPVectorizer	Revert r313771 "[SLP] Vectorize jumbled memory loads."	2017-09-20 18:00:03 +00:00
SpeculativeExecution
SROA	Re-land r313825: "[IR] Add llvm.dbg.addr, a control-dependent version of llvm.dbg.declare"	2017-09-21 19:52:03 +00:00
StraightLineStrengthReduce
StripDeadPrototypes
StripSymbols	Canonicalize the representation of empty an expression in DIGlobalVariableExpression	2017-08-30 18:06:51 +00:00
StructurizeCFG	[Dominators] Include infinite loops in PostDominatorTree	2017-08-15 18:14:57 +00:00
TailCallElim
ThinLTOBitcodeWriter
Util	[InstCombine] Add a flag to disable LowerDbgDeclare	2017-09-13 01:43:25 +00:00
WholeProgramDevirt	LowerTypeTests: Add import/export support for targets without absolute symbol constants.	2017-09-11 22:49:10 +00:00