Cross Reference: /external/swiftshader/third_party/LLVM/lib/Analysis/

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))

//===---------------------------------------------------------------------===//
Name	Date	Size
..	10-Aug-2018	4 KiB
AliasAnalysis.cpp	10-Aug-2018	15.2 KiB
AliasAnalysisCounter.cpp	10-Aug-2018	6.2 KiB
AliasAnalysisEvaluator.cpp	10-Aug-2018	10.9 KiB
AliasDebugger.cpp	10-Aug-2018	4.8 KiB
AliasSetTracker.cpp	10-Aug-2018	21.6 KiB
Analysis.cpp	10-Aug-2018	3.7 KiB
BasicAliasAnalysis.cpp	10-Aug-2018	47.7 KiB
BlockFrequencyInfo.cpp	10-Aug-2018	2.1 KiB
BranchProbabilityInfo.cpp	10-Aug-2018	14.7 KiB
CaptureTracking.cpp	10-Aug-2018	6.1 KiB
CFGPrinter.cpp	10-Aug-2018	4.9 KiB
ConstantFolding.cpp	10-Aug-2018	54.9 KiB
DbgInfoPrinter.cpp	10-Aug-2018	6.3 KiB
DebugInfo.cpp	10-Aug-2018	32.6 KiB
DIBuilder.cpp	10-Aug-2018	37.8 KiB
DominanceFrontier.cpp	10-Aug-2018	4.3 KiB
DomPrinter.cpp	10-Aug-2018	6.7 KiB
InlineCost.cpp	10-Aug-2018	25.3 KiB
INSTALL.vcxproj.filters	10-Aug-2018	657
InstCount.cpp	10-Aug-2018	2.7 KiB
InstructionSimplify.cpp	10-Aug-2018	98 KiB
Interval.cpp	10-Aug-2018	2 KiB
IntervalPartition.cpp	10-Aug-2018	4.2 KiB
IPA/	10-Aug-2018	4 KiB
IVUsers.cpp	10-Aug-2018	9.5 KiB
LazyValueInfo.cpp	10-Aug-2018	37.8 KiB
LibCallAliasAnalysis.cpp	10-Aug-2018	5.2 KiB
LibCallSemantics.cpp	10-Aug-2018	2.1 KiB
Lint.cpp	10-Aug-2018	24.9 KiB
LLVMAnalysis.vcxproj	10-Aug-2018	25.7 KiB
LLVMAnalysis.vcxproj.filters	10-Aug-2018	2.8 KiB
Loads.cpp	10-Aug-2018	9.4 KiB
LoopDependenceAnalysis.cpp	10-Aug-2018	12.9 KiB
LoopInfo.cpp	10-Aug-2018	25 KiB
LoopPass.cpp	10-Aug-2018	11.4 KiB
Makefile	10-Aug-2018	441
MemDepPrinter.cpp	10-Aug-2018	6.3 KiB
MemoryBuiltins.cpp	10-Aug-2018	7.6 KiB
MemoryDependenceAnalysis.cpp	10-Aug-2018	60.2 KiB
ModuleDebugInfoPrinter.cpp	10-Aug-2018	2.6 KiB
NoAliasAnalysis.cpp	10-Aug-2018	3.1 KiB
PACKAGE.vcxproj.filters	10-Aug-2018	657
PathNumbering.cpp	10-Aug-2018	16.2 KiB
PathProfileInfo.cpp	10-Aug-2018	13.9 KiB
PathProfileVerifier.cpp	10-Aug-2018	6.9 KiB
PHITransAddr.cpp	10-Aug-2018	16 KiB
PostDominators.cpp	10-Aug-2018	1.5 KiB
ProfileEstimatorPass.cpp	10-Aug-2018	15.8 KiB
ProfileInfo.cpp	10-Aug-2018	32.9 KiB
ProfileInfoLoader.cpp	10-Aug-2018	4.8 KiB
ProfileInfoLoaderPass.cpp	10-Aug-2018	9.3 KiB
ProfileVerifierPass.cpp	10-Aug-2018	13.4 KiB
README.txt	10-Aug-2018	1,006
RegionInfo.cpp	10-Aug-2018	22.7 KiB
RegionPass.cpp	10-Aug-2018	8.5 KiB
RegionPrinter.cpp	10-Aug-2018	6.7 KiB
ScalarEvolution.cpp	10-Aug-2018	266.2 KiB
ScalarEvolutionAliasAnalysis.cpp	10-Aug-2018	6.7 KiB
ScalarEvolutionExpander.cpp	10-Aug-2018	61.7 KiB
ScalarEvolutionNormalization.cpp	10-Aug-2018	8.6 KiB
SparsePropagation.cpp	10-Aug-2018	11.9 KiB
Trace.cpp	10-Aug-2018	1.6 KiB
TypeBasedAliasAnalysis.cpp	10-Aug-2018	10.2 KiB
ValueTracking.cpp	10-Aug-2018	70.3 KiB