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llvm-project/llvm/lib/Transforms/Scalar
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Stanislav Mekhanoshin ee2dd785f6 Only unswitch loops with uniform conditions 
Loop unswitching can be extremely harmful for a SIMT target. In case
if hoisted condition is not uniform a SIMT machine will execute both
clones of a loop sequentially. Therefor LoopUnswitch checks if the
condition is non-divergent.

Since DivergenceAnalysis adds an expensive PostDominatorTree analysis
not needed for non-SIMT targets a new option is added to avoid unneded
analysis initialization. The method getAnalysisUsage is called when
TargetTransformInfo is not yet available and we cannot use it here.
For that reason a new field DivergentTarget is added to PassManagerBuilder
to control the behavior and set this field from a target.

Differential Revision: https://reviews.llvm.org/D30796

llvm-svn: 298104
 		2017-03-17 17:13:41 +00:00
..
ADCE.cpp [ADCE] Remove redundent code [NFC] 2017-03-16 03:59:23 +00:00
AlignmentFromAssumptions.cpp [PH] Replace uses of AssertingVH from members of analysis results with 2017-01-24 12:55:57 +00:00
BDCE.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
CMakeLists.txt NVPTX: Move InferAddressSpaces to generic code 2017-01-31 01:10:58 +00:00
ConstantHoisting.cpp [Constant Hoisting] Avoid inserting instructions before EH pads 2017-03-01 22:41:12 +00:00
ConstantProp.cpp Don't remove side effecting instructions due to ConstantFoldInstruction 2016-07-22 04:54:44 +00:00
CorrelatedValuePropagation.cpp Revert r282872 "CVP. Turn marking adds as no wrap on by default" 2017-02-23 22:29:00 +00:00
DCE.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
DeadStoreElimination.cpp [DeadStoreElimination] Check function modref behavior before considering memory clobbered 2017-03-01 14:38:29 +00:00
EarlyCSE.cpp [EarlyCSE] reduce indent; NFCI 2017-03-15 20:25:05 +00:00
FlattenCFGPass.cpp
…
Float2Int.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
GVN.cpp VNCoercion: Make the function signatures all consistent 2017-03-11 00:51:01 +00:00
GVNHoist.cpp Move defClobbersUseOrDef to being a protected member of a class since we don't want anyone else using it 2017-03-02 23:06:46 +00:00
GuardWidening.cpp Add a wrapper around copy_if in STLExtras; NFC 2017-02-21 00:38:44 +00:00
IVUsersPrinter.cpp [PM] Separate the LoopAnalysisManager from the LoopPassManager and move 2017-01-11 09:43:56 +00:00
IndVarSimplify.cpp [IndVars] Add an assert 2017-02-20 23:37:11 +00:00
InductiveRangeCheckElimination.cpp [IRCE] Add a missing invariant check 2017-02-07 23:59:07 +00:00
InferAddressSpaces.cpp Bug 31948: Fix assertion when bitcasting constantexpr pointers 2017-02-17 00:32:19 +00:00
JumpThreading.cpp [JumpThread] Use AA in SimplifyPartiallyRedundantLoad() 2017-03-08 15:22:30 +00:00
LICM.cpp Make default value for disable-licm-promotion in licm explicit. 2017-02-21 20:53:48 +00:00
LLVMBuild.txt
…
LoadCombine.cpp [LoadCombine] Fix combining of loads which span an aliasing store. 2017-02-09 21:46:49 +00:00
LoopAccessAnalysisPrinter.cpp [PM] Separate the LoopAnalysisManager from the LoopPassManager and move 2017-01-11 09:43:56 +00:00
LoopDataPrefetch.cpp Revert @llvm.assume with operator bundles (r289755-r289757) 2016-12-19 08:22:17 +00:00
LoopDeletion.cpp [LoopDeletion] Modernize and simplify a bit. NFCI. 2017-02-26 07:08:20 +00:00
LoopDistribute.cpp Add a wrapper around copy_if in STLExtras; NFC 2017-02-21 00:38:44 +00:00
LoopIdiomRecognize.cpp [Analysis] Add LibFunc_ prefix to enums in TargetLibraryInfo. (NFC) 2017-01-23 23:16:46 +00:00
LoopInstSimplify.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
LoopInterchange.cpp Remove inclusion of SSAUpdater from several passes. 2017-01-29 01:55:24 +00:00
LoopLoadElimination.cpp Add a wrapper around copy_if in STLExtras; NFC 2017-02-21 00:38:44 +00:00
LoopPassManager.cpp [PM] Teach LoopUnroll to update the LPM infrastructure as it unrolls 2017-01-25 02:49:01 +00:00
LoopPredication.cpp Loop predication expand both sides of the widened condition 2017-02-27 15:44:49 +00:00
LoopRerollPass.cpp [LoopReroll] Make root-finding more aggressive. 2016-11-21 22:35:34 +00:00
LoopRotation.cpp [LoopRotate] Propagate dbg.value intrinsics 2017-03-08 09:56:22 +00:00
LoopSimplifyCFG.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
LoopSink.cpp [PM] Port LoopSink to the new pass manager. 2017-01-20 08:42:19 +00:00
LoopStrengthReduce.cpp Set option enabling LSR alternative way to resolve complex solution to false. 2017-03-04 03:14:05 +00:00
LoopUnrollPass.cpp [LoopUnrolling] Re-prioritize Peeling and Partial unrolling 2017-03-03 18:19:10 +00:00
LoopUnswitch.cpp Only unswitch loops with uniform conditions 2017-03-17 17:13:41 +00:00
LoopVersioningLICM.cpp [LoopVersioning] Require loop-simplify form for loop versioning. 2016-12-19 17:13:37 +00:00
LowerAtomic.cpp [PM] Remove support for omitting the AnalysisManager argument to new 2016-06-17 00:11:01 +00:00
LowerExpectIntrinsic.cpp [Profile] handle select instruction in 'expect' lowering 2016-09-02 22:03:40 +00:00
LowerGuardIntrinsic.cpp [PM] Port LowerGuardIntrinsic to the new PM. 2016-07-28 22:08:41 +00:00
MemCpyOptimizer.cpp MemCpyOptimizer: don't create new addrspace casts 2017-03-14 22:37:38 +00:00
MergedLoadStoreMotion.cpp Remove inclusion of SSAUpdater from several passes. 2017-01-29 01:55:24 +00:00
NaryReassociate.cpp [PH] Replace uses of AssertingVH from members of analysis results with 2017-01-24 12:55:57 +00:00
NewGVN.cpp Split NewGVN class into a legacy pass and an impl, instead of a merged class. 2017-03-12 04:46:45 +00:00
PartiallyInlineLibCalls.cpp [Analysis] Add LibFunc_ prefix to enums in TargetLibraryInfo. (NFC) 2017-01-23 23:16:46 +00:00
PlaceSafepoints.cpp Apply clang-tidy's modernize-loop-convert to most of lib/Transforms. 2016-06-26 12:28:59 +00:00
Reassociate.cpp [Reassociate] Add negated value of negative constant to the Duplicates list. 2017-02-23 18:49:03 +00:00
Reg2Mem.cpp Apply clang-tidy's modernize-loop-convert to most of lib/Transforms. 2016-06-26 12:28:59 +00:00
RewriteStatepointsForGC.cpp [RSForGC] Handle vector GEPs 2017-03-17 00:55:53 +00:00
SCCP.cpp [SCCP] Merge markOverdefined and markAnythingOverdefined. 2017-03-08 01:26:37 +00:00
SROA.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
Scalar.cpp Split NewGVN class into a legacy pass and an impl, instead of a merged class. 2017-03-12 04:46:45 +00:00
Scalarizer.cpp Scalarizer: Support scalarizing intrinsics 2016-07-25 20:02:54 +00:00
SeparateConstOffsetFromGEP.cpp Revert @llvm.assume with operator bundles (r289755-r289757) 2016-12-19 08:22:17 +00:00
SimplifyCFGPass.cpp Revert @llvm.assume with operator bundles (r289755-r289757) 2016-12-19 08:22:17 +00:00
Sink.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
SpeculativeExecution.cpp SpeculativeExecution: Allow speculating more inst types 2016-10-28 20:00:33 +00:00
StraightLineStrengthReduce.cpp IR: Change the gep_type_iterator API to avoid always exposing the "current" type. 2016-12-02 02:24:42 +00:00
StructurizeCFG.cpp [StructurizeCfg] Update dominator info. 2017-01-10 02:50:47 +00:00
TailRecursionElimination.cpp [TRE] Remove dead code 2016-11-07 22:17:37 +00:00