android13

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liiir1985 7f62dcda9f initial		2024-06-22 20:45:49 +08:00
..
AliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
AliasAnalysisEvaluator.cpp	initial	2024-06-22 20:45:49 +08:00
AliasAnalysisSummary.cpp	initial	2024-06-22 20:45:49 +08:00
AliasAnalysisSummary.h	initial	2024-06-22 20:45:49 +08:00
AliasSetTracker.cpp	initial	2024-06-22 20:45:49 +08:00
Analysis.cpp	initial	2024-06-22 20:45:49 +08:00
Android.bp	initial	2024-06-22 20:45:49 +08:00
AssumptionCache.cpp	initial	2024-06-22 20:45:49 +08:00
BasicAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
BlockFrequencyInfo.cpp	initial	2024-06-22 20:45:49 +08:00
BlockFrequencyInfoImpl.cpp	initial	2024-06-22 20:45:49 +08:00
BranchProbabilityInfo.cpp	initial	2024-06-22 20:45:49 +08:00
CFG.cpp	initial	2024-06-22 20:45:49 +08:00
CFGPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
CFLAndersAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
CFLGraph.h	initial	2024-06-22 20:45:49 +08:00
CFLSteensAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
CGSCCPassManager.cpp	initial	2024-06-22 20:45:49 +08:00
CMakeLists.txt	initial	2024-06-22 20:45:49 +08:00
CallGraph.cpp	initial	2024-06-22 20:45:49 +08:00
CallGraphSCCPass.cpp	initial	2024-06-22 20:45:49 +08:00
CallPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
CaptureTracking.cpp	initial	2024-06-22 20:45:49 +08:00
CodeMetrics.cpp	initial	2024-06-22 20:45:49 +08:00
ConstantFolding.cpp	initial	2024-06-22 20:45:49 +08:00
CostModel.cpp	initial	2024-06-22 20:45:49 +08:00
Delinearization.cpp	initial	2024-06-22 20:45:49 +08:00
DemandedBits.cpp	initial	2024-06-22 20:45:49 +08:00
DependenceAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
DivergenceAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
DomPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
DominanceFrontier.cpp	initial	2024-06-22 20:45:49 +08:00
EHPersonalities.cpp	initial	2024-06-22 20:45:49 +08:00
GlobalsModRef.cpp	initial	2024-06-22 20:45:49 +08:00
IVUsers.cpp	initial	2024-06-22 20:45:49 +08:00
IndirectCallPromotionAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
InlineCost.cpp	initial	2024-06-22 20:45:49 +08:00
InstCount.cpp	initial	2024-06-22 20:45:49 +08:00
InstructionSimplify.cpp	initial	2024-06-22 20:45:49 +08:00
Interval.cpp	initial	2024-06-22 20:45:49 +08:00
IntervalPartition.cpp	initial	2024-06-22 20:45:49 +08:00
IteratedDominanceFrontier.cpp	initial	2024-06-22 20:45:49 +08:00
LLVMBuild.txt	initial	2024-06-22 20:45:49 +08:00
LazyBlockFrequencyInfo.cpp	initial	2024-06-22 20:45:49 +08:00
LazyCallGraph.cpp	initial	2024-06-22 20:45:49 +08:00
LazyValueInfo.cpp	initial	2024-06-22 20:45:49 +08:00
Lint.cpp	initial	2024-06-22 20:45:49 +08:00
Loads.cpp	initial	2024-06-22 20:45:49 +08:00
LoopAccessAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
LoopInfo.cpp	initial	2024-06-22 20:45:49 +08:00
LoopPass.cpp	initial	2024-06-22 20:45:49 +08:00
LoopPassManager.cpp	initial	2024-06-22 20:45:49 +08:00
LoopUnrollAnalyzer.cpp	initial	2024-06-22 20:45:49 +08:00
MemDepPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
MemDerefPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
MemoryBuiltins.cpp	initial	2024-06-22 20:45:49 +08:00
MemoryDependenceAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
MemoryLocation.cpp	initial	2024-06-22 20:45:49 +08:00
ModuleDebugInfoPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
ModuleSummaryAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
ObjCARCAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
ObjCARCAnalysisUtils.cpp	initial	2024-06-22 20:45:49 +08:00
ObjCARCInstKind.cpp	initial	2024-06-22 20:45:49 +08:00
OrderedBasicBlock.cpp	initial	2024-06-22 20:45:49 +08:00
PHITransAddr.cpp	initial	2024-06-22 20:45:49 +08:00
PostDominators.cpp	initial	2024-06-22 20:45:49 +08:00
ProfileSummaryInfo.cpp	initial	2024-06-22 20:45:49 +08:00
PtrUseVisitor.cpp	initial	2024-06-22 20:45:49 +08:00
README.txt	initial	2024-06-22 20:45:49 +08:00
RegionInfo.cpp	initial	2024-06-22 20:45:49 +08:00
RegionPass.cpp	initial	2024-06-22 20:45:49 +08:00
RegionPrinter.cpp	initial	2024-06-22 20:45:49 +08:00
ScalarEvolution.cpp	initial	2024-06-22 20:45:49 +08:00
ScalarEvolutionAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
ScalarEvolutionExpander.cpp	initial	2024-06-22 20:45:49 +08:00
ScalarEvolutionNormalization.cpp	initial	2024-06-22 20:45:49 +08:00
ScopedNoAliasAA.cpp	initial	2024-06-22 20:45:49 +08:00
SparsePropagation.cpp	initial	2024-06-22 20:45:49 +08:00
StratifiedSets.h	initial	2024-06-22 20:45:49 +08:00
TargetLibraryInfo.cpp	initial	2024-06-22 20:45:49 +08:00
TargetTransformInfo.cpp	initial	2024-06-22 20:45:49 +08:00
Trace.cpp	initial	2024-06-22 20:45:49 +08:00
TypeBasedAliasAnalysis.cpp	initial	2024-06-22 20:45:49 +08:00
TypeMetadataUtils.cpp	initial	2024-06-22 20:45:49 +08:00
ValueTracking.cpp	initial	2024-06-22 20:45:49 +08:00
VectorUtils.cpp	initial	2024-06-22 20:45:49 +08:00

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))

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