llvm-project/llvm/lib/Analysis
Albert Gutowski 795d7d6381 Create llvm.addressofreturnaddress intrinsic
Summary: We need a new LLVM intrinsic to implement MS _AddressOfReturnAddress builtin on 64-bit Windows.

Reviewers: majnemer, rnk

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D25293

llvm-svn: 284061
2016-10-12 22:13:19 +00:00
..
AliasAnalysis.cpp [AliasAnalysis] Give back AA results for fence instructions 2016-07-15 17:19:24 +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 [AliasSetTracker] Degrade AliasSetTracker when may-alias sets get too large. 2016-08-19 17:05:22 +00:00
Analysis.cpp [PM] Port CFGViewer and CFGPrinter to the new Pass Manager 2016-09-15 18:35:27 +00:00
AssumptionCache.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
BasicAliasAnalysis.cpp Replace a few more "fall through" comments with LLVM_FALLTHROUGH 2016-08-17 20:30:52 +00:00
BlockFrequencyInfo.cpp Turn cl::values() (for enum) from a vararg function to using C++ variadic template 2016-10-08 19:41:06 +00:00
BlockFrequencyInfoImpl.cpp [GraphTraits] Replace all NodeType usage with NodeRef 2016-08-22 21:09:30 +00:00
BranchProbabilityInfo.cpp Enhance calcColdCallHeuristics for InvokeInst 2016-09-23 17:26:14 +00:00
CFG.cpp Avoid overly large SmallPtrSet/SmallSet 2016-01-30 01:24:31 +00:00
CFGPrinter.cpp [PM] Port CFGViewer and CFGPrinter to the new Pass Manager 2016-09-15 18:35:27 +00:00
CFLAndersAliasAnalysis.cpp Make some LLVM_CONSTEXPR variables const. NFC. 2016-08-25 01:05:08 +00:00
CFLGraph.h [CFLAA] Check for pointer types in more places. 2016-07-29 01:23:45 +00:00
CFLSteensAliasAnalysis.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
CGSCCPassManager.cpp Fixup r279618, instantiate *AnalysisManagerProxy<*AnalysisManager,LazyCallGraph::SCC>, instead of *AnalysisManagerProxy<*AnalysisManager,LazyCallGraph::SCC,LazyCallGraph&>, for PassID. 2016-08-30 15:47:13 +00:00
CMakeLists.txt [BPI] Add new LazyBPI analysis 2016-07-28 23:31:12 +00:00
CallGraph.cpp Consistently use ModuleAnalysisManager 2016-08-09 00:28:38 +00:00
CallGraphSCCPass.cpp Use StringRef in Pass/PassManager APIs (NFC) 2016-10-01 02:56:57 +00:00
CallPrinter.cpp [CG] Rename the DOT printing pass to actually reference "DOT". 2016-03-10 11:04:40 +00:00
CaptureTracking.cpp [CaptureTracking] Volatile operations capture their memory location 2016-05-26 17:36:22 +00:00
CodeMetrics.cpp [Assumptions] Make collecting ephemeral values not quadratic in the 2016-08-18 17:51:24 +00:00
ConstantFolding.cpp [ConstantFold] Improve the bitcast folding logic for constant vectors. 2016-09-13 14:50:47 +00:00
CostModel.cpp [LV, X86] Be more optimistic about vectorizing shifts. 2016-08-04 22:48:03 +00:00
Delinearization.cpp [NFC] Header cleanup 2016-04-18 09:17:29 +00:00
DemandedBits.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
DependenceAnalysis.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
DivergenceAnalysis.cpp DivergenceAnalysis: Fix crash with no return blocks 2016-05-09 16:57:08 +00:00
DomPrinter.cpp Introduce analysis pass to compute PostDominators in the new pass manager. NFC 2016-02-25 17:54:07 +00:00
DominanceFrontier.cpp [PM] Make the AnalysisManager parameter to run methods a reference. 2016-03-11 11:05:24 +00:00
EHPersonalities.cpp Use the range variant of find instead of unpacking begin/end 2016-08-11 22:21:41 +00:00
GlobalsModRef.cpp Make GlobalsAA ignore dead constant expressions. 2016-10-04 00:03:55 +00:00
IVUsers.cpp Consistently use LoopAnalysisManager 2016-08-09 00:28:52 +00:00
IndirectCallPromotionAnalysis.cpp Remove another unused variable from r275216 2016-07-12 23:49:17 +00:00
InlineCost.cpp Rename isHotFunction/isColdFunction to isFunctionEntryHot/isFunctionEntryCold. (NFC) 2016-10-10 21:47:28 +00:00
InstCount.cpp
InstructionSimplify.cpp Remove duplicated code; NFC 2016-10-02 00:09:57 +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 Normalize file docs. NFC. 2016-07-21 20:52:35 +00:00
LLVMBuild.txt Refactor indirect call promotion profitability analysis (NFC) 2016-07-12 21:13:44 +00:00
LazyBlockFrequencyInfo.cpp [BPI] Add new LazyBPI analysis 2016-07-28 23:31:12 +00:00
LazyBranchProbabilityInfo.cpp [BPI] Add new LazyBPI analysis 2016-07-28 23:31:12 +00:00
LazyCallGraph.cpp [LCG] Add the necessary functionality to the LazyCallGraph to support inlining. 2016-10-12 07:59:56 +00:00
LazyValueInfo.cpp Remove duplicated code; NFC 2016-10-02 00:09:57 +00:00
Lint.cpp Fix some Clang-tidy modernize-use-using and Include What You Use warnings. 2016-08-13 00:50:41 +00:00
Loads.cpp [Loads] Properly populate the visited set in isDereferenceableAndAlignedPointer 2016-08-31 03:22:32 +00:00
LoopAccessAnalysis.cpp [LAA, LV] Port to new streaming interface for opt remarks. Update LV 2016-09-30 00:01:30 +00:00
LoopInfo.cpp [LCSSA] Implement linear algorithm for the isRecursivelyLCSSAForm 2016-10-11 13:37:22 +00:00
LoopPass.cpp Consistently use LoopAnalysisManager 2016-08-09 00:28:52 +00:00
LoopPassManager.cpp PM: Check that loop passes preserve a basic set of analyses 2016-05-03 21:35:08 +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 NFC. Move isDereferenceable to Loads.h/cpp 2016-02-24 12:49:04 +00:00
MemoryBuiltins.cpp Make some LLVM_CONSTEXPR variables const. NFC. 2016-08-25 01:05:08 +00:00
MemoryDependenceAnalysis.cpp Test commit access (NFC) 2016-10-06 10:58:41 +00:00
MemoryLocation.cpp [TLI] Unify LibFunc signature checking. NFCI. 2016-04-27 19:04:35 +00:00
ModuleDebugInfoPrinter.cpp Re-commit "Use StringRef in Support/Darf APIs (NFC)" 2016-10-05 05:59:29 +00:00
ModuleSummaryAnalysis.cpp [ThinLTO] Record calls to aliases 2016-10-08 16:11:42 +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 Don't filter diagnostics written as YAML to the output file 2016-10-04 18:13:45 +00:00
OrderedBasicBlock.cpp
PHITransAddr.cpp Use the range variant of find instead of unpacking begin/end 2016-08-11 22:21:41 +00:00
PostDominators.cpp [PM] Remove support for omitting the AnalysisManager argument to new 2016-06-17 00:11:01 +00:00
ProfileSummaryInfo.cpp Tune isHotFunction/isColdFunction 2016-10-11 05:19:00 +00:00
PtrUseVisitor.cpp
README.txt
RegionInfo.cpp Turn cl::values() (for enum) from a vararg function to using C++ variadic template 2016-10-08 19:41:06 +00:00
RegionPass.cpp [RegionPass] Some minor cleanups 2016-07-19 17:50:27 +00:00
RegionPrinter.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
ScalarEvolution.cpp Reapply "[LoopUnroll] Use the upper bound of the loop trip count to fullly unroll a loop" 2016-10-12 21:29:38 +00:00
ScalarEvolutionAliasAnalysis.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
ScalarEvolutionExpander.cpp Create a getelementptr instead of sub expr for ValueOffsetPair if the 2016-09-14 04:39:50 +00:00
ScalarEvolutionNormalization.cpp Remove emacs mode markers from .cpp files. NFC 2016-04-24 17:55:41 +00:00
ScopedNoAliasAA.cpp [ScopedNoAliasAA] collectMDInDomain should be a free function 2016-08-15 03:56:06 +00:00
SparsePropagation.cpp Apply clang-tidy's modernize-loop-convert to lib/Analysis. 2016-06-26 17:27:42 +00:00
StratifiedSets.h [CFLAA] Simplify CFLGraphBuilder. NFC. 2016-07-11 22:59:09 +00:00
TargetLibraryInfo.cpp Turn cl::values() (for enum) from a vararg function to using C++ variadic template 2016-10-08 19:41:06 +00:00
TargetTransformInfo.cpp [ARM] Don't convert switches to lookup tables of pointers with ROPI/RWPI 2016-10-07 08:48:24 +00:00
Trace.cpp Annotate dump() methods with LLVM_DUMP_METHOD, addressing Richard Smith r259192 post commit comment. 2016-01-29 20:50:44 +00:00
TypeBasedAliasAnalysis.cpp Consistently use FunctionAnalysisManager 2016-08-09 00:28:15 +00:00
TypeMetadataUtils.cpp [IR] Make getIndexedOffsetInType return a signed result 2016-07-13 03:42:38 +00:00
ValueTracking.cpp [ValueTracking] An improvement to IR ValueTracking on Non-negative Integers 2016-10-12 16:18:43 +00:00
VectorUtils.cpp Add handling of !invariant.load to PropagateMetadata. 2016-09-11 01:39:08 +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))

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