llvm-project/llvm/lib/Analysis
Reid Kleckner fc7ba565ed [EH] Recognize __(gxx|gcc)_personality_seh0 as the GNU EH personalities
These are no-ops when there are no invokes. We don't need to emit LSDAs
for them.

Fixes PR33220.

llvm-svn: 304367
2017-05-31 22:35:52 +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 Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
AliasAnalysisSummary.cpp Update a comment. 2016-08-25 01:29:55 +00:00
AliasAnalysisSummary.h Make some LLVM_CONSTEXPR variables const. NFC. 2016-08-25 01:05:08 +00:00
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 BasicAA: Uninserted instructions have no parent, and notDifferentParent explicitly allows for this case, but getParent crashes when handed one. 2017-05-19 19:01:21 +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] Reduce the probability of unreachable edge to minimal value greater than 0 2017-05-18 06:11:56 +00:00
CFG.cpp
CFGPrinter.cpp [PM] Port CFGViewer and CFGPrinter to the new Pass Manager 2016-09-15 18:35:27 +00:00
CFLAndersAliasAnalysis.cpp Apply clang-tidy's performance-unnecessary-value-param to LLVM. 2017-01-13 14:39:03 +00:00
CFLGraph.h [CFLAA] Add missing break; note things are broken. 2017-05-31 02:35:26 +00:00
CFLSteensAliasAnalysis.cpp [PM] Change the static object whose address is used to uniquely identify 2016-11-23 17:53:26 +00:00
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
CallGraph.cpp CallGraph: Remove almost-unused field 'Root'. 2017-05-11 23:59:05 +00:00
CallGraphSCCPass.cpp [Statistics] Add a method to atomically update a statistic that contains a maximum 2017-05-18 00:51:39 +00:00
CallPrinter.cpp
CaptureTracking.cpp
CodeMetrics.cpp Revert @llvm.assume with operator bundles (r289755-r289757) 2016-12-19 08:22:17 +00:00
ConstantFolding.cpp Added missing break; added LLVM_FALLTHROUGH to address warning: this statement may fall through. NFC. 2017-05-31 20:25:13 +00:00
CostModel.cpp [SystemZ] TargetTransformInfo cost functions implemented. 2017-04-12 11:49:08 +00:00
Delinearization.cpp
DemandedBits.cpp [ValueTracking] Remove const_casts on several calls to computeKnownBits and ComputeSignBit. NFC 2017-05-13 17:22:16 +00:00
DependenceAnalysis.cpp BitVector: add iterators for set bits 2017-05-17 01:07:53 +00:00
DivergenceAnalysis.cpp
DomPrinter.cpp [DomPrinter] Add a way to programmatically dump a dot representation. 2017-04-24 17:48:44 +00:00
DominanceFrontier.cpp [PM] Introduce an analysis set used to preserve all analyses over 2017-01-15 06:32:49 +00:00
EHPersonalities.cpp [EH] Recognize __(gxx|gcc)_personality_seh0 as the GNU EH personalities 2017-05-31 22:35:52 +00:00
GlobalsModRef.cpp [PM] Change the static object whose address is used to uniquely identify 2016-11-23 17:53:26 +00:00
IVUsers.cpp [IVUsers] Don't bail out of normalizing non-affine add recs 2017-04-25 06:53:25 +00:00
IndirectCallPromotionAnalysis.cpp Remove another unused variable from r275216 2016-07-12 23:49:17 +00:00
InlineCost.cpp [Inliner] Do not mix callsite and callee hotness based updates. 2017-05-16 21:18:09 +00:00
InstCount.cpp
InstructionSimplify.cpp InstructionSimplify: Remove now-redundant reachability tests, as dominates() already does them 2017-05-31 01:47:24 +00:00
Interval.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
IntervalPartition.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
IteratedDominanceFrontier.cpp Drop graph_ prefix 2017-02-09 20:37:46 +00:00
LLVMBuild.txt Restore "[ThinLTO] Prevent exporting of locals used/defined in module level asm" 2016-11-14 17:12:32 +00:00
LazyBlockFrequencyInfo.cpp [LazyBFI] Fix typos 2017-02-14 17:21:12 +00:00
LazyBranchProbabilityInfo.cpp [BPI] Add new LazyBPI analysis 2016-07-28 23:31:12 +00:00
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 [ValueTracking] Convert most of the calls to computeKnownBits to use the version that returns the KnownBits object. 2017-05-24 16:53:07 +00:00
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 [LegacyPM] Make the 'addLoop' method accept a loop to add rather than 2017-05-25 03:01:31 +00:00
LoopUnrollAnalyzer.cpp [LoopUnrollAnalyzer] Handle out of bounds accesses in visitLoad 2016-07-23 02:56:49 +00:00
MemDepPrinter.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
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 Added LLVM_FALLTHROUGH to address warning: this statement may fall through. NFC. 2017-05-31 22:02:05 +00:00
MemoryLocation.cpp [Analysis] Add LibFunc_ prefix to enums in TargetLibraryInfo. (NFC) 2017-01-23 23:16:46 +00:00
MemorySSA.cpp [IR] De-virtualize ~Value to save a vptr 2017-05-18 17:24:10 +00:00
MemorySSAUpdater.cpp [MSSA] Clean up the updater a bit. NFC 2017-04-21 04:54:52 +00:00
ModuleDebugInfoPrinter.cpp [IR] Remove the DIExpression field from DIGlobalVariable. 2016-12-20 02:09:43 +00:00
ModuleSummaryAnalysis.cpp Ensure non-null ProfileSummaryInfo passed to ModuleSummaryIndex builder 2017-05-10 18:52:16 +00:00
ObjCARCAliasAnalysis.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
ObjCARCAnalysisUtils.cpp
ObjCARCInstKind.cpp Create llvm.addressofreturnaddress intrinsic 2016-10-12 22:13:19 +00:00
OptimizationDiagnosticInfo.cpp IR: Give function GlobalValue::getRealLinkageName() a less misleading name: dropLLVMManglingEscape(). 2017-05-16 00:39:01 +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 Add hasProfileSummary and has{Sample|Instrumentation}Profile methods 2017-05-16 20:14:39 +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 Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
ScalarEvolution.cpp Added LLVM_FALLTHROUGH to address warning: this statement may fall through. NFC. 2017-05-31 22:09:46 +00:00
ScalarEvolutionAliasAnalysis.cpp [PM] Change the static object whose address is used to uniquely identify 2016-11-23 17:53:26 +00:00
ScalarEvolutionExpander.cpp [SCEVExpander] Try harder to avoid introducing inttoptr 2017-05-27 03:22:55 +00:00
ScalarEvolutionNormalization.cpp Teach SCEV normalization to de/normalize non-affine add recs 2017-04-25 00:09:19 +00:00
ScopedNoAliasAA.cpp [PM] Change the static object whose address is used to uniquely identify 2016-11-23 17:53:26 +00:00
SparsePropagation.cpp [IR] Redesign the case iterator in SwitchInst to actually be an iterator 2017-04-12 07:27:28 +00:00
StratifiedSets.h Do a sweep over move ctors and remove those that are identical to the default. 2016-10-20 12:20:28 +00:00
TargetLibraryInfo.cpp Revert "Add pthread_self function prototype and make it speculatable." 2017-05-21 00:37:55 +00:00
TargetTransformInfo.cpp [PPC] Inline expansion of memcmp 2017-05-31 17:12:38 +00:00
Trace.cpp
TypeBasedAliasAnalysis.cpp [TBAA] Don't generate invalid TBAA when merging nodes 2016-12-11 20:07:25 +00:00
TypeMetadataUtils.cpp Analysis: Add appropriate const qualification to functions in TypeMetadataUtils.cpp. NFC. 2017-01-27 22:55:30 +00:00
ValueTracking.cpp Added LLVM_FALLTHROUGH to address warning: this statement may fall through. NFC. 2017-05-31 22:16:24 +00:00
VectorUtils.cpp Introduce experimental generic intrinsics for horizontal vector reductions. 2017-05-09 10:43:25 +00:00

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))

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