llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-21 19:32:16 +00:00

History

Hal Finkel 41418d17cc Add ISD::FROUND for libm round()

All libm floating-point rounding functions, except for round(), had their own
ISD nodes. Recent PowerPC cores have an instruction for round(), and so here I'm
adding ISD::FROUND so that round() can be custom lowered as well.

For the most part, this is straightforward. I've added an intrinsic
and a matching ISD node just like those for nearbyint() and friends. The
SelectionDAG pattern I've named frnd (because ISD::FP_ROUND has already claimed
fround).

This will be used by the PowerPC backend in a follow-up commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187926 91177308-0d34-0410-b5e6-96231b3b80d8

2013-08-07 22:49:12 +00:00

IPA

Have InlineCost check constant fcmps

2013-07-20 04:09:00 +00:00

AliasAnalysis.cpp

Reimplement isPotentiallyReachable to make nocapture deduction much stronger.

2013-07-27 01:24:00 +00:00

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

This patch breaks up Wrap.h so that it does not have to include all of

2013-05-01 20:59:00 +00:00

BasicAliasAnalysis.cpp

Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.

2013-07-14 04:42:23 +00:00

BlockFrequencyInfo.cpp

BlockFrequency: Bump up the entry frequency a bit.

2013-06-25 13:34:40 +00:00

BranchProbabilityInfo.cpp

Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.

2013-07-04 01:31:24 +00:00

CaptureTracking.cpp

Extend 'readonly' and 'readnone' to work on function arguments as well as

2013-07-06 00:29:58 +00:00

CFG.cpp

Reimplement isPotentiallyReachable to make nocapture deduction much stronger.

2013-07-27 01:24:00 +00:00

CFGPrinter.cpp

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CMakeLists.txt

Also update CMakeLists.txt for r187283.

2013-07-27 01:25:51 +00:00

CodeMetrics.cpp

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ConstantFolding.cpp

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CostModel.cpp

Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.

2013-07-11 16:22:38 +00:00

DependenceAnalysis.cpp

Remove extraneous semicolon.

2013-08-06 16:40:40 +00:00

DominanceFrontier.cpp

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DomPrinter.cpp

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InstCount.cpp

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InstructionSimplify.cpp

Add ISD::FROUND for libm round()

2013-08-07 22:49:12 +00:00

Interval.cpp

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IntervalPartition.cpp

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IVUsers.cpp

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LazyValueInfo.cpp

Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.

2013-07-04 01:31:24 +00:00

LibCallAliasAnalysis.cpp

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LibCallSemantics.cpp

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Lint.cpp

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LLVMBuild.txt

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Loads.cpp

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LoopInfo.cpp

Add 'const' qualifiers to static const char* variables.

2013-07-16 01:17:10 +00:00

LoopPass.cpp

Comment: try to clarify loop iteration order.

2013-07-20 23:10:31 +00:00

Makefile

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MemDepPrinter.cpp

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MemoryBuiltins.cpp

Treat nothrow forms of ::operator delete and ::operator delete[] as

2013-07-21 23:11:42 +00:00

MemoryDependenceAnalysis.cpp

Fix xemacs mode line, don't put them in .cpp files (just header files). No

2013-06-10 23:10:59 +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

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PHITransAddr.cpp

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PostDominators.cpp

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ProfileDataLoader.cpp

Use SmallVectorImpl& instead of SmallVector to avoid repeating small vector size.

2013-07-14 04:42:23 +00:00

ProfileDataLoaderPass.cpp

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ProfileEstimatorPass.cpp

Use SmallVectorImpl::iterator/const_iterator instead of SmallVector to avoid specifying the vector size.

2013-07-04 01:31:24 +00:00

ProfileInfo.cpp

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ProfileInfoLoader.cpp

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ProfileInfoLoaderPass.cpp

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ProfileVerifierPass.cpp

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PtrUseVisitor.cpp

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README.txt

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RegionInfo.cpp

RegionInfo: Do not crash if unreachable block is found

2013-05-03 15:48:34 +00:00

RegionPass.cpp

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RegionPrinter.cpp

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ScalarEvolution.cpp

Fix a severe compile time problem when forming large SCEV expressions.

2013-07-31 02:43:40 +00:00

ScalarEvolutionAliasAnalysis.cpp

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ScalarEvolutionExpander.cpp

Remove a bunch of old SCEVExpander FIXME's for preserving NoWrap.

2013-07-14 03:10:08 +00:00

ScalarEvolutionNormalization.cpp

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SparsePropagation.cpp

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TargetTransformInfo.cpp

SimplifyCFG: Use parallel-and and parallel-or mode to consolidate branch conditions

2013-07-27 00:01:07 +00:00

Trace.cpp

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TypeBasedAliasAnalysis.cpp

Struct-path aware TBAA: change the format of TBAAStructType node.

2013-04-27 00:26:11 +00:00

ValueTracking.cpp

isKnownToBeAPowerOfTwo: Strengthen isKnownToBeAPowerOfTwo's analysis on add instructions

2013-07-30 21:01:36 +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))

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