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9ecf4261b1
llvm-mirror/test/Transforms
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Sanjoy Das 9ecf4261b1 [LoopUnrolling] Peel loops with invariant backedge Phi input 
Summary:
If a loop contains a Phi node which has an invariant input from back
edge, it is profitable to peel such loops (rather than unroll them) to
use the advantage that this Phi is always invariant starting from 2nd
iteration. After the 1st iteration is peeled, other optimizations can
potentially simplify calculations with this invariant.

Patch by Max Kazantsev!

Reviewers: sanjoy, apilipenko, igor-laevsky, anna, mkuper, reames

Reviewed By: mkuper

Subscribers: mkuper, mzolotukhin, llvm-commits

Differential Revision: https://reviews.llvm.org/D30161

llvm-svn: 296898
2017-03-03 18:19:15 +00:00
..
ADCE
AddDiscriminators Encode duplication factor from loop vectorization and loop unrolling to discriminator. 2017-02-10 21:09:07 +00:00
AlignmentFromAssumptions
ArgumentPromotion Verifier: Disallow a line number without a file in DISubprogram 2017-02-17 23:57:42 +00:00
AtomicExpand
BBVectorize Introduce -unroll-partial-threshold to separate PartialThreshold from Threshold in loop unorller. 2017-01-17 23:39:33 +00:00
BDCE
BranchFolding
CodeExtractor
CodeGenPrepare [BypassSlowDivision] Use ValueTracking to simplify run-time checks 2017-03-02 22:12:15 +00:00
ConstantHoisting [Constant Hoisting] Avoid inserting instructions before EH pads 2017-03-01 22:41:12 +00:00
ConstantMerge
ConstProp opt: Rename -default-data-layout flag to -data-layout and make it always override the layout. 2017-02-17 17:36:52 +00:00
Coroutines [coroutines] Spill the result of the invoke instruction correctly 2017-01-25 02:25:54 +00:00
CorrelatedValuePropagation Revert r282872 "CVP. Turn marking adds as no wrap on by default" 2017-02-23 22:29:00 +00:00
CountingFunctionInserter
CrossDSOCFI
DCE
DeadArgElim
DeadStoreElimination [DeadStoreElimination] Check function modref behavior before considering memory clobbered 2017-03-01 14:38:29 +00:00
EarlyCSE [EarlyCSE] Don't DSE across readnone functions that may throw 2017-01-17 20:15:47 +00:00
EliminateAvailableExternally
Float2Int
ForcedFunctionAttrs
FunctionAttrs [FunctionAttrs] try to extend nonnull-ness of arguments from a callsite back to its parent function 2017-02-13 23:10:51 +00:00
FunctionImport [ModuleSummaryAnalysis] Don't crash when referencing unnamed globals. 2017-02-22 18:53:38 +00:00
GCOVProfiling
GlobalDCE [PH] Replace uses of AssertingVH from members of analysis results with 2017-01-24 12:55:57 +00:00
GlobalMerge Renumber testcase metadata nodes after r290153. 2016-12-22 00:45:21 +00:00
GlobalOpt Verifier: Disallow a line number without a file in DISubprogram 2017-02-17 23:57:42 +00:00
GlobalSplit
GuardWidening
GVN opt: Rename -default-data-layout flag to -data-layout and make it always override the layout. 2017-02-17 17:36:52 +00:00
GVNHoist Revert "Re-apply "[GVNHoist] Move GVNHoist to function simplification part of pipeline."" 2017-03-03 14:27:53 +00:00
IndVarSimplify [ValueTracking] Don't do an unchecked shift in ComputeNumSignBits 2017-02-25 20:30:45 +00:00
InferAddressSpaces Bug 31948: Fix assertion when bitcasting constantexpr pointers 2017-02-17 00:32:19 +00:00
InferFunctionAttrs
Inline Strip debug info when inlining into a nodebug function. 2017-02-28 16:58:13 +00:00
InstCombine [InstCombine] Avoid faulty combines of select-cmp-br 2017-03-02 15:18:58 +00:00
InstMerge Remove the load hoisting code of MLSM, it is completely subsumed by GVNHoist 2017-01-24 19:55:36 +00:00
InstSimplify [InstSimplify] add nsw/nuw (xor X, signbit), signbit --> X 2017-02-18 21:59:09 +00:00
InterleavedAccess [ARM/AArch64] Support wide interleaved accesses 2017-03-02 15:11:20 +00:00
Internalize
IPConstantProp [IPCP] Don't propagate return value for naked functions. 2017-02-04 19:44:14 +00:00
IRCE [IRCE] Add a missing invariant check 2017-02-07 23:59:07 +00:00
JumpThreading [JumpThreading] Re-enable JumpThreading for guards 2017-02-17 04:21:14 +00:00
LCSSA
LICM Correct a typo, s/hosting/hoisting/ 2017-02-14 16:41:10 +00:00
LoadCombine [LoadCombine] Change test to not use instcombine. 2017-02-10 00:44:08 +00:00
LoadStoreVectorizer LoadStoreVectorizer: Split even sized illegal chains properly 2017-02-23 03:58:53 +00:00
LoopDataPrefetch
LoopDeletion [PM] Teach LoopDeletion to correctly update the LPM when loops are 2017-01-18 02:41:26 +00:00
LoopDistribute Move test of lazy BFI with ORE to a generic directory 2017-01-13 00:16:23 +00:00
LoopIdiom Fix some broken CHECK lines. 2017-01-22 20:28:56 +00:00
LoopInterchange
LoopLoadElim [PM] Port LoopLoadElimination to the new pass manager and wire it into 2017-01-27 01:32:26 +00:00
LoopPredication Loop predication expand both sides of the widened condition 2017-02-27 15:44:49 +00:00
LoopReroll
LoopRotate
LoopSimplify [BasicBlockUtils] Use getFirstNonPHIOrDbg to set debugloc for instructions created in SplitBlockPredecessors 2017-02-14 21:10:40 +00:00
LoopSimplifyCFG
LoopStrengthReduce [LSR] Canonicalize formula and put recursive Reg related with current loop in ScaledReg. 2017-02-22 21:47:08 +00:00
LoopUnroll [LoopUnrolling] Peel loops with invariant backedge Phi input 2017-03-03 18:19:15 +00:00
LoopUnswitch Fix a bug when unswitching on partial LIV for SwitchInst 2017-02-27 18:00:13 +00:00
LoopVectorize [ARM/AArch64] Update costs for interleaved accesses with wide types 2017-03-02 15:15:35 +00:00
LoopVersioning
LoopVersioningLICM
LowerAtomic
LowerExpectIntrinsic
LowerGuardIntrinsic
LowerInvoke
LowerSwitch
LowerTypeTests IR: Type ID summary extensions for WPD; thread summary into WPD pass. 2017-02-13 19:26:18 +00:00
Mem2Reg
MemCpyOpt [MemCpyOpt] Don't sink LoadInst below possible clobber. 2016-12-27 17:58:12 +00:00
MergeFunc MergeFunctions: Preserve debug info in thunks, under option -mergefunc-preserve-debug-info 2017-01-21 02:02:56 +00:00
MetaRenamer
NameAnonGlobals
NaryReassociate
NewGVN [BasicAA] Take attributes into account when requesting modref info for a call site 2017-03-01 13:19:51 +00:00
ObjCARC
PartiallyInlineLibCalls Add positive test for sqrt "partial inlining". NFC. 2017-01-04 21:24:56 +00:00
PGOProfile [PGO] Directory name stripping in global identifier for static functions 2017-02-25 00:00:36 +00:00
PhaseOrdering
PlaceSafepoints
PreISelIntrinsicLowering
PruneEH
Reassociate [Reassociate] Add negated value of negative constant to the Duplicates list. 2017-02-23 18:49:03 +00:00
Reg2Mem
RewriteStatepointsForGC
SafeStack [Fuchsia] Use thread-pointer ABI slots for stack-protector and safe-stack 2017-02-24 03:10:10 +00:00
SampleProfile Add function importing info from samplepgo profile to the module summary. 2017-02-28 18:09:44 +00:00
Scalarizer
SCCP opt: Rename -default-data-layout flag to -data-layout and make it always override the layout. 2017-02-17 17:36:52 +00:00
SeparateConstOffsetFromGEP
SimplifyCFG opt: Rename -default-data-layout flag to -data-layout and make it always override the layout. 2017-02-17 17:36:52 +00:00
Sink
SLPVectorizer [SLP] Fixes the bug due to absence of in order uses of scalars which needs to be available 2017-03-03 10:02:47 +00:00
SpeculativeExecution
SROA
StraightLineStrengthReduce
StripDeadPrototypes
StripSymbols Renumber testcase metadata nodes after r290153. 2016-12-22 00:45:21 +00:00
StructurizeCFG Revert "Fix PR 24415 (at least), by making our post-dominator tree behavior sane." 2017-03-02 21:08:37 +00:00
TailCallElim
ThinLTOBitcodeWriter ThinLTOBitcodeWriter: Do not follow operand edges of type GlobalValue when looking for virtual functions. 2017-03-02 23:10:17 +00:00
Util PredicateInfo: Support switch statements 2017-02-22 22:20:58 +00:00
WholeProgramDevirt WholeProgramDevirt: For VCP use a 32-bit ConstantInt for the byte offset. 2017-02-17 19:43:45 +00:00