Cross Reference: /external/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
..	17-Jul-2012	4 KiB
AliasAnalysis.cpp	17-Jul-2012	15.2 KiB
AliasAnalysisCounter.cpp	17-Jul-2012	6.2 KiB
AliasAnalysisEvaluator.cpp	17-Jul-2012	10.9 KiB
AliasDebugger.cpp	17-Jul-2012	4.8 KiB
AliasSetTracker.cpp	17-Jul-2012	21.6 KiB
Analysis.cpp	17-Jul-2012	3.7 KiB
Android.mk	17-Jul-2012	2 KiB
BasicAliasAnalysis.cpp	17-Jul-2012	47.7 KiB
BlockFrequencyInfo.cpp	17-Jul-2012	2.1 KiB
BranchProbabilityInfo.cpp	17-Jul-2012	14.6 KiB
CaptureTracking.cpp	17-Jul-2012	6.1 KiB
CFGPrinter.cpp	17-Jul-2012	4.9 KiB
CMakeLists.txt	17-Jul-2012	1.4 KiB
ConstantFolding.cpp	17-Jul-2012	54.9 KiB
DbgInfoPrinter.cpp	17-Jul-2012	6.3 KiB
DebugInfo.cpp	17-Jul-2012	33.4 KiB
DIBuilder.cpp	17-Jul-2012	37.8 KiB
DominanceFrontier.cpp	17-Jul-2012	4.3 KiB
DomPrinter.cpp	17-Jul-2012	6.7 KiB
InlineCost.cpp	17-Jul-2012	25.3 KiB
InstCount.cpp	17-Jul-2012	2.7 KiB
InstructionSimplify.cpp	17-Jul-2012	98 KiB
Interval.cpp	17-Jul-2012	2 KiB
IntervalPartition.cpp	17-Jul-2012	4.2 KiB
IPA/	17-Jul-2012	4 KiB
IVUsers.cpp	17-Jul-2012	9.5 KiB
LazyValueInfo.cpp	17-Jul-2012	37.8 KiB
LibCallAliasAnalysis.cpp	17-Jul-2012	5.2 KiB
LibCallSemantics.cpp	17-Jul-2012	2.1 KiB
Lint.cpp	17-Jul-2012	24.9 KiB
Loads.cpp	17-Jul-2012	9.4 KiB
LoopDependenceAnalysis.cpp	17-Jul-2012	12.9 KiB
LoopInfo.cpp	17-Jul-2012	25 KiB
LoopPass.cpp	17-Jul-2012	11.4 KiB
Makefile	17-Jul-2012	441
MemDepPrinter.cpp	17-Jul-2012	6.3 KiB
MemoryBuiltins.cpp	17-Jul-2012	7.6 KiB
MemoryDependenceAnalysis.cpp	17-Jul-2012	60.2 KiB
ModuleDebugInfoPrinter.cpp	17-Jul-2012	2.6 KiB
NoAliasAnalysis.cpp	17-Jul-2012	3.1 KiB
NOTICE	17-Jul-2012	3.1 KiB
PathNumbering.cpp	17-Jul-2012	16.2 KiB
PathProfileInfo.cpp	17-Jul-2012	13.9 KiB
PathProfileVerifier.cpp	17-Jul-2012	6.9 KiB
PHITransAddr.cpp	17-Jul-2012	16 KiB
PostDominators.cpp	17-Jul-2012	1.5 KiB
ProfileEstimatorPass.cpp	17-Jul-2012	15.8 KiB
ProfileInfo.cpp	17-Jul-2012	32.9 KiB
ProfileInfoLoader.cpp	17-Jul-2012	4.8 KiB
ProfileInfoLoaderPass.cpp	17-Jul-2012	9.3 KiB
ProfileVerifierPass.cpp	17-Jul-2012	13.4 KiB
README.txt	17-Jul-2012	1,006
RegionInfo.cpp	17-Jul-2012	22.7 KiB
RegionPass.cpp	17-Jul-2012	8.5 KiB
RegionPrinter.cpp	17-Jul-2012	6.7 KiB
ScalarEvolution.cpp	17-Jul-2012	266.2 KiB
ScalarEvolutionAliasAnalysis.cpp	17-Jul-2012	6.7 KiB
ScalarEvolutionExpander.cpp	17-Jul-2012	61.7 KiB
ScalarEvolutionNormalization.cpp	17-Jul-2012	8.6 KiB
SparsePropagation.cpp	17-Jul-2012	11.9 KiB
Trace.cpp	17-Jul-2012	1.6 KiB
TypeBasedAliasAnalysis.cpp	17-Jul-2012	10.2 KiB
ValueTracking.cpp	17-Jul-2012	70.3 KiB