llvm/Analysis at 90969b9ee096fd6544e8b64dfe88dfe2924c059f - llvm

RPCSX/llvm

mirror of https://github.com/RPCSX/llvm.git synced 2025-01-22 12:16:31 +00:00

History

Jiangning Liu de3646b278 Add two thresholds lvi-overdefined-BB-threshold and lvi-overdefined-threshold

for LVI algorithm. For a specific value to be lowered, when the number of basic
blocks being checked for overdefined lattice value is larger than
lvi-overdefined-BB-threshold, or the times of encountering overdefined value
for a single basic block is larger than lvi-overdefined-threshold, the LVI
algorithm will stop further lowering the lattice value.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218231 91177308-0d34-0410-b5e6-96231b3b80d8

2014-09-22 02:23:05 +00:00

IPA

Add functions for finding ephemeral values

2014-09-07 13:49:57 +00:00

AliasAnalysis.cpp

…

AliasAnalysisCounter.cpp

…

AliasAnalysisEvaluator.cpp

…

AliasDebugger.cpp

…

AliasSetTracker.cpp

…

Analysis.cpp

Add a CFL Alias Analysis implementation

2014-09-02 21:43:13 +00:00

AssumptionTracker.cpp

Add an Assumption-Tracking Pass

2014-09-07 12:44:26 +00:00

BasicAliasAnalysis.cpp

Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)

2014-09-07 18:57:58 +00:00

BlockFrequencyInfo.cpp

…

BlockFrequencyInfoImpl.cpp

…

BranchProbabilityInfo.cpp

…

CaptureTracking.cpp

…

CFG.cpp

…

CFGPrinter.cpp

Modernize raw_fd_ostream's constructor a bit.

2014-08-25 18:16:47 +00:00

CFLAliasAnalysis.cpp

[CFLAA] Remove one final initializer list

2014-09-03 00:06:47 +00:00

CGSCCPassManager.cpp

…

CMakeLists.txt

Add file to CMake build as well.

2014-09-18 00:39:20 +00:00

CodeMetrics.cpp

Add functions for finding ephemeral values

2014-09-07 13:49:57 +00:00

ConstantFolding.cpp

Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size.

2014-08-21 05:55:13 +00:00

CostModel.cpp

…

Delinearization.cpp

…

DependenceAnalysis.cpp

Analysis: cleanup

2014-08-26 02:03:40 +00:00

DominanceFrontier.cpp

…

DomPrinter.cpp

…

FunctionTargetTransformInfo.cpp

Add a new pass FunctionTargetTransformInfo. This pass serves as a

2014-09-18 00:34:14 +00:00

InstCount.cpp

…

InstructionSimplify.cpp

InstSimplify: Don't allow (x srem y) urem y -> x srem y

2014-09-17 04:16:35 +00:00

Interval.cpp

…

IntervalPartition.cpp

…

IVUsers.cpp

Repace SmallPtrSet with SmallPtrSetImpl in function arguments to avoid needing to mention the size.

2014-08-21 05:55:13 +00:00

JumpInstrTableInfo.cpp

…

LazyCallGraph.cpp

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LazyValueInfo.cpp

Add two thresholds lvi-overdefined-BB-threshold and lvi-overdefined-threshold

2014-09-22 02:23:05 +00:00

LibCallAliasAnalysis.cpp

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LibCallSemantics.cpp

…

Lint.cpp

Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)

2014-09-07 18:57:58 +00:00

LLVMBuild.txt

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Loads.cpp

…

LoopInfo.cpp

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LoopPass.cpp

…

Makefile

…

MemDepPrinter.cpp

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MemoryBuiltins.cpp

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MemoryDependenceAnalysis.cpp

Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)

2014-09-07 18:57:58 +00:00

ModuleDebugInfoPrinter.cpp

…

NoAliasAnalysis.cpp

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PHITransAddr.cpp

Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)

2014-09-07 18:57:58 +00:00

PostDominators.cpp

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PtrUseVisitor.cpp

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README.txt

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RegionInfo.cpp

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RegionPass.cpp

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RegionPrinter.cpp

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ScalarEvolution.cpp

Make use @llvm.assume for loop guards in ScalarEvolution

2014-09-07 21:37:59 +00:00

ScalarEvolutionAliasAnalysis.cpp

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ScalarEvolutionExpander.cpp

Make use of @llvm.assume in ValueTracking (computeKnownBits, etc.)

2014-09-07 18:57:58 +00:00

ScalarEvolutionNormalization.cpp

Fix typos in comments, NFC

2014-08-29 21:53:01 +00:00

ScopedNoAliasAA.cpp

Add override to overriden virtual methods, remove virtual keywords.

2014-09-03 11:41:21 +00:00

SparsePropagation.cpp

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StratifiedSets.h

[CFLAA] And even more MSVC fixes

2014-09-02 23:50:01 +00:00

TargetTransformInfo.cpp

Add a new pass FunctionTargetTransformInfo. This pass serves as a

2014-09-18 00:34:14 +00:00

Trace.cpp

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TypeBasedAliasAnalysis.cpp

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ValueTracking.cpp

Fix an ODR violation consisting of two 'struct Query' in the global namespace.

2014-09-12 08:56:53 +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))

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