llvm/lib/Analysis
2017-05-08 17:39:01 +00:00
..
AliasAnalysis.cpp [IR] Make paramHasAttr to use arg indices instead of attr indices 2017-04-14 20:19:02 +00:00
AliasAnalysisEvaluator.cpp
AliasAnalysisSummary.cpp
AliasAnalysisSummary.h
AliasSetTracker.cpp Use a WeakVH for UnknownInstructions in AliasSetTracker 2017-03-11 01:15:48 +00:00
Analysis.cpp MemorySSA: Move to Analysis, from Transforms/Utils. It's used as 2017-04-11 20:06:36 +00:00
AssumptionCache.cpp Rename WeakVH to WeakTrackingVH; NFC 2017-05-01 17:07:49 +00:00
BasicAliasAnalysis.cpp Handle invariant.group.barrier in BasicAA 2017-04-24 19:37:17 +00:00
BlockFrequencyInfo.cpp [PGO] internal option cleanups 2017-02-02 21:29:17 +00:00
BlockFrequencyInfoImpl.cpp Cleanup dump() functions. 2017-01-28 02:02:38 +00:00
BranchProbabilityInfo.cpp [BPI] NFC: reorder ifs to bail out earlier 2017-04-17 06:39:47 +00:00
CallGraph.cpp Cleanup dump() functions. 2017-01-28 02:02:38 +00:00
CallGraphSCCPass.cpp Rename WeakVH to WeakTrackingVH; NFC 2017-05-01 17:07:49 +00:00
CallPrinter.cpp
CaptureTracking.cpp
CFG.cpp
CFGPrinter.cpp
CFLAndersAliasAnalysis.cpp Apply clang-tidy's performance-unnecessary-value-param to LLVM. 2017-01-13 14:39:03 +00:00
CFLGraph.h [IR] Abstract away ArgNo+1 attribute indexing as much as possible 2017-05-03 18:17:31 +00:00
CFLSteensAliasAnalysis.cpp
CGSCCPassManager.cpp [PM/LCG] Teach the LazyCallGraph how to replace a function without 2017-02-09 23:24:13 +00:00
CMakeLists.txt MemorySSA: Move to Analysis, from Transforms/Utils. It's used as 2017-04-11 20:06:36 +00:00
CodeMetrics.cpp
ConstantFolding.cpp [KnownBits] Add methods for determining if KnownBits is a constant value 2017-05-03 23:12:29 +00:00
CostModel.cpp [SystemZ] TargetTransformInfo cost functions implemented. 2017-04-12 11:49:08 +00:00
Delinearization.cpp
DemandedBits.cpp [APInt] Add clearSignBit method. Use it and setSignBit in a few places. NFCI 2017-04-28 16:58:05 +00:00
DependenceAnalysis.cpp Cleanup dump() functions. 2017-01-28 02:02:38 +00:00
DivergenceAnalysis.cpp
DominanceFrontier.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
DomPrinter.cpp [DomPrinter] Add a way to programmatically dump a dot representation. 2017-04-24 17:48:44 +00:00
EHPersonalities.cpp
GlobalsModRef.cpp
IndirectCallPromotionAnalysis.cpp
InlineCost.cpp Refactor callsite cost computation into a helper function /NFC 2017-05-02 05:38:41 +00:00
InstCount.cpp
InstructionSimplify.cpp [InstSimplify] fix typo; NFC 2017-05-08 16:35:02 +00:00
Interval.cpp
IntervalPartition.cpp
IteratedDominanceFrontier.cpp Drop graph_ prefix 2017-02-09 20:37:46 +00:00
IVUsers.cpp [IVUsers] Don't bail out of normalizing non-affine add recs 2017-04-25 06:53:25 +00:00
LazyBlockFrequencyInfo.cpp [LazyBFI] Fix typos 2017-02-14 17:21:12 +00:00
LazyBranchProbabilityInfo.cpp
LazyCallGraph.cpp [LCG] Fix EXPENSIVE_CHECKS typo. NFC 2017-02-28 18:34:55 +00:00
LazyValueInfo.cpp [LazyValueInfo] Avoid unnecessary copies of ConstantRanges 2017-05-06 03:35:15 +00:00
Lint.cpp [KnownBits] Add wrapper methods for setting and clear all bits in the underlying APInts in KnownBits. 2017-05-05 17:36:09 +00:00
LLVMBuild.txt
Loads.cpp Extract FindAvailablePtrLoadStore out of FindAvailableLoadedValue. NFCI 2017-03-19 15:27:52 +00:00
LoopAccessAnalysis.cpp [LAA] Correctly return a half-open range in expandBounds 2017-04-05 09:24:26 +00:00
LoopAnalysisManager.cpp Revert r293017 and fix the actual underlying issue. 2017-02-07 01:50:48 +00:00
LoopInfo.cpp Make VerifyDomInfo and VerifyLoopInfo global variables 2017-01-24 05:52:07 +00:00
LoopPass.cpp Implement getPassName() for IR printing passes. 2017-03-10 07:09:20 +00:00
LoopUnrollAnalyzer.cpp
MemDepPrinter.cpp
MemDerefPrinter.cpp
MemoryBuiltins.cpp [MemoryBuiltins] Add isMallocOrCallocLikeFn so BasicAA can check for both at the same time 2017-04-18 21:43:46 +00:00
MemoryDependenceAnalysis.cpp [Devirtualization] MemDep returns non-local !invariant.group dependencies 2017-01-12 11:33:58 +00:00
MemoryLocation.cpp [Analysis] Add LibFunc_ prefix to enums in TargetLibraryInfo. (NFC) 2017-01-23 23:16:46 +00:00
MemorySSA.cpp MemorySSA: Stop tracking def-or-use blocks. 2017-04-16 19:45:51 +00:00
MemorySSAUpdater.cpp [MSSA] Clean up the updater a bit. NFC 2017-04-21 04:54:52 +00:00
ModuleDebugInfoPrinter.cpp
ModuleSummaryAnalysis.cpp Re-apply r302108, "IR: Use pointers instead of GUIDs to represent edges in the module summary. NFCI." 2017-05-04 18:03:25 +00:00
ObjCARCAliasAnalysis.cpp
ObjCARCAnalysisUtils.cpp
ObjCARCInstKind.cpp
OptimizationDiagnosticInfo.cpp [ORE] Remove ORE.emit{{.+}} functions 2017-02-23 21:32:53 +00:00
OrderedBasicBlock.cpp
PHITransAddr.cpp PHITransAddr: Use new SimplifyQuery based API. 2017-04-26 20:56:13 +00:00
PostDominators.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
ProfileSummaryInfo.cpp Use isFunctionHotInCallGraph to set the function section prefix. 2017-03-23 23:14:11 +00:00
PtrUseVisitor.cpp
README.txt
RegionInfo.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
RegionPass.cpp Implement getPassName() for IR printing passes. 2017-03-10 07:09:20 +00:00
RegionPrinter.cpp
ScalarEvolution.cpp [SCEV] Don't use std::move on both inputs to APInt::operator+ or operator-. It might be confusing to the reader. NFC 2017-05-08 17:39:01 +00:00
ScalarEvolutionAliasAnalysis.cpp
ScalarEvolutionExpander.cpp Rename WeakVH to WeakTrackingVH; NFC 2017-05-01 17:07:49 +00:00
ScalarEvolutionNormalization.cpp Teach SCEV normalization to de/normalize non-affine add recs 2017-04-25 00:09:19 +00:00
ScopedNoAliasAA.cpp
SparsePropagation.cpp [IR] Redesign the case iterator in SwitchInst to actually be an iterator 2017-04-12 07:27:28 +00:00
StratifiedSets.h
TargetLibraryInfo.cpp TargetLibraryInfo: Introduce wcslen 2017-05-05 20:25:50 +00:00
TargetTransformInfo.cpp [InlineCost] Improve the cost heuristic for Switch 2017-04-28 16:04:03 +00:00
Trace.cpp
TypeBasedAliasAnalysis.cpp
TypeMetadataUtils.cpp Analysis: Add appropriate const qualification to functions in TypeMetadataUtils.cpp. NFC. 2017-01-27 22:55:30 +00:00
ValueTracking.cpp [ValueTracking] Use KnownOnes to provide a better bound on known zeros for ctlz/cttz intrinics 2017-05-08 17:22:34 +00:00
VectorUtils.cpp [LV] Move interleaved access helper functions to VectorUtils (NFC) 2017-02-01 17:45:46 +00:00

Analysis Opportunities:

//===---------------------------------------------------------------------===//

In test/Transforms/LoopStrengthReduce/quadradic-exit-value.ll, the
ScalarEvolution expression for %r is this:

  {1,+,3,+,2}<loop>

Outside the loop, this could be evaluated simply as (%n * %n), however
ScalarEvolution currently evaluates it as

  (-2 + (2 * (trunc i65 (((zext i64 (-2 + %n) to i65) * (zext i64 (-1 + %n) to i65)) /u 2) to i64)) + (3 * %n))

In addition to being much more complicated, it involves i65 arithmetic,
which is very inefficient when expanded into code.

//===---------------------------------------------------------------------===//

In formatValue in test/CodeGen/X86/lsr-delayed-fold.ll,

ScalarEvolution is forming this expression:

((trunc i64 (-1 * %arg5) to i32) + (trunc i64 %arg5 to i32) + (-1 * (trunc i64 undef to i32)))

This could be folded to

(-1 * (trunc i64 undef to i32))

//===---------------------------------------------------------------------===//