llvm-mirror

mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-22 18:54:02 +01:00

History

Stanislav Mekhanoshin 3c6f5332f7 Option to ignore llvm[.compiler].used uses in hasAddressTaken() Differential Revision: https://reviews.llvm.org/D96087		2021-02-25 10:06:24 -08:00
..
models/inliner
AliasAnalysis.cpp
AliasAnalysisEvaluator.cpp
AliasAnalysisSummary.cpp
AliasAnalysisSummary.h
AliasSetTracker.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
Analysis.cpp
AssumeBundleQueries.cpp
AssumptionCache.cpp
BasicAliasAnalysis.cpp
BlockFrequencyInfo.cpp
BlockFrequencyInfoImpl.cpp
BranchProbabilityInfo.cpp
CallGraph.cpp	Option to ignore llvm[.compiler].used uses in hasAddressTaken()	2021-02-25 10:06:24 -08:00
CallGraphSCCPass.cpp
CallPrinter.cpp
CaptureTracking.cpp
CFG.cpp
CFGPrinter.cpp
CFLAndersAliasAnalysis.cpp
CFLGraph.h
CFLSteensAliasAnalysis.cpp
CGSCCPassManager.cpp	Only verify LazyCallGraph under expensive checks	2021-02-22 20:18:59 -08:00
CMakeLists.txt
CmpInstAnalysis.cpp
CodeMetrics.cpp
ConstantFolding.cpp
ConstraintSystem.cpp
CostModel.cpp
DDG.cpp
DDGPrinter.cpp
Delinearization.cpp
DemandedBits.cpp
DependenceAnalysis.cpp
DependenceGraphBuilder.cpp
DevelopmentModeInlineAdvisor.cpp
DivergenceAnalysis.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
DominanceFrontier.cpp
DomPrinter.cpp
DomTreeUpdater.cpp
EHPersonalities.cpp
FunctionPropertiesAnalysis.cpp
GlobalsModRef.cpp
GuardUtils.cpp
HeatUtils.cpp
ImportedFunctionsInliningStatistics.cpp
IndirectCallPromotionAnalysis.cpp
InlineAdvisor.cpp
InlineCost.cpp
InlineSizeEstimatorAnalysis.cpp
InstCount.cpp
InstructionPrecedenceTracking.cpp
InstructionSimplify.cpp	[InstSimplify] Handle nsw shl -> poison patterns	2021-02-23 18:26:56 +00:00
Interval.cpp
IntervalPartition.cpp
IRSimilarityIdentifier.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
IVDescriptors.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
IVUsers.cpp
LazyBlockFrequencyInfo.cpp
LazyBranchProbabilityInfo.cpp
LazyCallGraph.cpp	Only verify LazyCallGraph under expensive checks	2021-02-22 20:18:59 -08:00
LazyValueInfo.cpp
LegacyDivergenceAnalysis.cpp
Lint.cpp
Loads.cpp
LoopAccessAnalysis.cpp
LoopAnalysisManager.cpp
LoopCacheAnalysis.cpp
LoopInfo.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
LoopNestAnalysis.cpp	[LoopNest] Use `getUniqueSuccessor()` instead when checking empty blocks	2021-02-24 09:53:12 +08:00
LoopPass.cpp
LoopUnrollAnalyzer.cpp
MemDepPrinter.cpp
MemDerefPrinter.cpp
MemoryBuiltins.cpp
MemoryDependenceAnalysis.cpp
MemoryLocation.cpp
MemorySSA.cpp
MemorySSAUpdater.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
MLInlineAdvisor.cpp
ModuleDebugInfoPrinter.cpp
ModuleSummaryAnalysis.cpp	collectUsedGlobalVariables: migrate SmallPtrSetImpl overload to SmallVecImpl overload after D97128	2021-02-23 16:09:06 -08:00
MustExecute.cpp
ObjCARCAliasAnalysis.cpp
ObjCARCAnalysisUtils.cpp
ObjCARCInstKind.cpp
OptimizationRemarkEmitter.cpp
PHITransAddr.cpp
PhiValues.cpp
PostDominators.cpp
ProfileSummaryInfo.cpp
PtrUseVisitor.cpp
README.txt
RegionInfo.cpp
RegionPass.cpp
RegionPrinter.cpp
ReleaseModeModelRunner.cpp
ReplayInlineAdvisor.cpp
ScalarEvolution.cpp
ScalarEvolutionAliasAnalysis.cpp
ScalarEvolutionDivision.cpp
ScalarEvolutionNormalization.cpp
ScopedNoAliasAA.cpp
StackLifetime.cpp
StackSafetyAnalysis.cpp
StratifiedSets.h
SyncDependenceAnalysis.cpp
SyntheticCountsUtils.cpp
TargetLibraryInfo.cpp
TargetTransformInfo.cpp	[TTI] Change getOperandsScalarizationOverhead to take Type args	2021-02-23 13:04:59 +00:00
TFUtils.cpp
Trace.cpp
TypeBasedAliasAnalysis.cpp
TypeMetadataUtils.cpp
ValueLattice.cpp
ValueLatticeUtils.cpp
ValueTracking.cpp	Revert rGd65ddca83ff85c7345fe9a0f5a15750f01e38420 - "[ValueTracking] ComputeKnownBits - minimum leading/trailing zero bits in LSHR/SHL (PR44526)"	2021-02-24 18:03:17 +00:00
VectorUtils.cpp	[Analysis] Use range-based for loops (NFC)	2021-02-22 20:17:18 -08:00
VFABIDemangling.cpp

README.txt

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))

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