llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-15 07:34:33 +00:00

History

Dan Gohman f042660197 Move Instruction::isSafeToSpeculativelyExecute out of VMCore and

into Analysis as a standalone function, since there's no need for
it to be in VMCore. Also, update it to use isKnownNonZero and
other goodies available in Analysis, making it more precise,
enabling more aggressive optimization.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146610 91177308-0d34-0410-b5e6-96231b3b80d8

2011-12-14 23:49:11 +00:00

IPA

LLVMBuild: Remove trailing newline, which irked me.

2011-12-12 19:48:00 +00:00

AliasAnalysis.cpp

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AliasAnalysisCounter.cpp

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AliasAnalysisEvaluator.cpp

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AliasDebugger.cpp

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AliasSetTracker.cpp

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Analysis.cpp

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BasicAliasAnalysis.cpp

Refactor code to use new attribute getters on CallSite for NoCapture and ByVal.

2011-11-20 19:09:04 +00:00

BlockFrequencyInfo.cpp

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BranchProbabilityInfo.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

CaptureTracking.cpp

Fix crasher in GVN due to my recent capture tracking changes.

2011-11-21 19:42:56 +00:00

CFGPrinter.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

CMakeLists.txt

build/CMake: Finish removal of add_llvm_library_dependencies.

2011-11-29 19:25:30 +00:00

ConstantFolding.cpp

Switch llvm.cttz and llvm.ctlz to accept a second i1 parameter which

2011-12-12 04:26:04 +00:00

DbgInfoPrinter.cpp

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DebugInfo.cpp

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DIBuilder.cpp

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DominanceFrontier.cpp

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DomPrinter.cpp

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InlineCost.cpp

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InstCount.cpp

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InstructionSimplify.cpp

Add support for vectors of pointers.

2011-12-05 06:29:09 +00:00

Interval.cpp

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IntervalPartition.cpp

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IVUsers.cpp

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LazyValueInfo.cpp

Clear the new cache.

2011-12-03 15:19:55 +00:00

LibCallAliasAnalysis.cpp

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LibCallSemantics.cpp

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Lint.cpp

Fix a few more places where TargetData/TargetLibraryInfo is not being passed.

2011-12-02 01:26:24 +00:00

LLVMBuild.txt

LLVMBuild: Introduce a common section which currently has a list of the

2011-12-12 22:45:54 +00:00

Loads.cpp

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LoopDependenceAnalysis.cpp

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LoopInfo.cpp

Move Instruction::isSafeToSpeculativelyExecute out of VMCore and

2011-12-14 23:49:11 +00:00

LoopPass.cpp

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Makefile

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MemDepPrinter.cpp

Fix a stupid typo in MemDepPrinter.

2011-12-14 02:54:39 +00:00

MemoryBuiltins.cpp

Validate the return type when checking if a function is malloc.

2011-11-23 17:58:47 +00:00

MemoryDependenceAnalysis.cpp

Fix crasher in GVN due to my recent capture tracking changes.

2011-11-21 19:42:56 +00:00

ModuleDebugInfoPrinter.cpp

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NoAliasAnalysis.cpp

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PathNumbering.cpp

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PathProfileInfo.cpp

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PathProfileVerifier.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

PHITransAddr.cpp

Move Instruction::isSafeToSpeculativelyExecute out of VMCore and

2011-12-14 23:49:11 +00:00

PostDominators.cpp

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ProfileEstimatorPass.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

ProfileInfo.cpp

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ProfileInfoLoader.cpp

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ProfileInfoLoaderPass.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

ProfileVerifierPass.cpp

Move code into anonymous namespaces.

2011-11-26 23:01:57 +00:00

README.txt

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RegionInfo.cpp

Missed some users of Value::getNameStr.

2011-11-15 18:30:06 +00:00

RegionPass.cpp

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RegionPrinter.cpp

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ScalarEvolution.cpp

Fix a few more places where TargetData/TargetLibraryInfo is not being passed.

2011-12-02 01:26:24 +00:00

ScalarEvolutionAliasAnalysis.cpp

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ScalarEvolutionExpander.cpp

LSR: Fold redundant bitcasts on-the-fly.

2011-12-14 22:07:19 +00:00

ScalarEvolutionNormalization.cpp

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SparsePropagation.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

Trace.cpp

Remove all remaining uses of Value::getNameStr().

2011-11-15 16:27:03 +00:00

TypeBasedAliasAnalysis.cpp

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ValueTracking.cpp

Move Instruction::isSafeToSpeculativelyExecute out of VMCore and

2011-12-14 23:49:11 +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))

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