llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-30 20:24:32 +00:00

Files

Andrew Trick e08c32249f LSR Fix: check SCEV expression safety before expansion.

All SCEV expressions used by LSR formulae must be safe to
expand. i.e. they may not contain UDiv unless we can prove nonzero
denominator.

Fixes PR11356: LSR hoists UDiv.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160205 91177308-0d34-0410-b5e6-96231b3b80d8

2012-07-13 23:33:10 +00:00

IPA

RefreshCallGraph: ignore 'invoke intrinsic'. IntrinsicInst doesnt not recognize invoke, and shouldnt at this point, since the rest of LLVM codebase doesnt expect invoke of intrinsics

2012-06-29 17:49:32 +00:00

AliasAnalysis.cpp

Move the capture analysis from MemoryDependencyAnalysis to a more general place

2012-05-14 20:35:04 +00:00

AliasAnalysisCounter.cpp

Persuade GCC that there is nothing worth warning about here (there isn't).

2012-02-05 14:20:11 +00:00

AliasAnalysisEvaluator.cpp

Remove unnecessary default cases in switches that cover all enum values.

2012-01-10 16:47:17 +00:00

AliasDebugger.cpp

…

AliasSetTracker.cpp

Reduce use list thrashing by using DenseMap's find_as for maps with ValueHandle keys.

2012-06-30 22:37:15 +00:00

Analysis.cpp

C API functions must be able to see their extern "C" definitions, or it will be impossible to call them from C.

2011-08-19 01:36:54 +00:00

BasicAliasAnalysis.cpp

refactor the MemoryBuiltin analysis:

2012-06-21 15:45:28 +00:00

BlockFrequencyInfo.cpp

Add some constantness to BranchProbabilityInfo and BlockFrequnencyInfo.

2011-12-20 20:03:10 +00:00

BranchProbabilityInfo.cpp

Make the unreachable probability much much heavier. The previous

2011-12-22 09:26:37 +00:00

CaptureTracking.cpp

Fix intendation.

2012-05-10 23:38:07 +00:00

CFGPrinter.cpp

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

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

CMakeLists.txt

Update the CMake files.

2012-06-29 09:01:47 +00:00

CodeMetrics.cpp

A pile of long over-due refactorings here. There are some very, *very*

2012-05-04 00:58:03 +00:00

ConstantFolding.cpp

Reapply r155682, making constant folding more consistent, with a fix to work

2012-04-27 17:50:22 +00:00

DbgInfoPrinter.cpp

Move lib/Analysis/DebugInfo.cpp to lib/VMCore/DebugInfo.cpp and

2012-06-28 00:05:13 +00:00

DominanceFrontier.cpp

Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

2011-12-20 02:50:00 +00:00

DomPrinter.cpp

remove the blank line from previous ci.

2012-02-04 03:18:47 +00:00

InlineCost.cpp

Fix typos found by http://github.com/lyda/misspell-check

2012-06-02 10:20:22 +00:00

InstCount.cpp

…

InstructionSimplify.cpp

Remove extraneous ';'.

2012-05-17 20:27:58 +00:00

Interval.cpp

…

IntervalPartition.cpp

…

IVUsers.cpp

IVUsers should only generate SCEV's for values that are safe to speculate.

2012-07-13 23:33:05 +00:00

LazyValueInfo.cpp

make LazyValueInfo analyze the default case of switch statements (we know that in the default branch the value cannot be any of the switch cases)

2012-06-28 16:13:37 +00:00

LibCallAliasAnalysis.cpp

…

LibCallSemantics.cpp

…

Lint.cpp

Always compute all the bits in ComputeMaskedBits.

2012-04-04 12:51:34 +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

enhance jump threading to preserve TBAA information when PRE'ing loads,

2012-03-13 18:07:41 +00:00

LoopDependenceAnalysis.cpp

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +00:00

LoopInfo.cpp

Enable the new LoopInfo algorithm by default.

2012-06-26 04:11:38 +00:00

LoopPass.cpp

Enable the new LoopInfo algorithm by default.

2012-06-26 04:11:38 +00:00

Makefile

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MemDepPrinter.cpp

Mark some static arrays as const.

2012-05-24 06:35:32 +00:00

MemoryBuiltins.cpp

fold PHI nodes in SizeOffsetEvaluator whenever possible.

2012-07-03 17:13:25 +00:00

MemoryDependenceAnalysis.cpp

refactor the MemoryBuiltin analysis:

2012-06-21 15:45:28 +00:00

ModuleDebugInfoPrinter.cpp

Move lib/Analysis/DebugInfo.cpp to lib/VMCore/DebugInfo.cpp and

2012-06-28 00:05:13 +00:00

NoAliasAnalysis.cpp

…

PathNumbering.cpp

[unwind removal] We no longer have 'unwind' instructions being generated, so

2012-02-06 21:16:41 +00:00

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

Uniformize the InstructionSimplify interface by ensuring that all routines

2012-03-13 11:42:19 +00:00

PostDominators.cpp

…

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

Round 2 of dead private variable removal.

2012-06-06 19:47:08 +00:00

ProfileInfoLoaderPass.cpp

Round 2 of dead private variable removal.

2012-06-06 19:47:08 +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

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

RegionPass.cpp

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

RegionPrinter.cpp

Rename the Region::block_iterator to Region::block_node_iterator, and

2012-05-04 20:55:23 +00:00

ScalarEvolution.cpp

Factor SCEV traversal code so I can use it elsewhere. No functionality.

2012-07-13 23:33:03 +00:00

ScalarEvolutionAliasAnalysis.cpp

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ScalarEvolutionExpander.cpp

LSR Fix: check SCEV expression safety before expansion.

2012-07-13 23:33:10 +00:00

ScalarEvolutionNormalization.cpp

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +00:00

SparsePropagation.cpp

Taken into account Duncan's comments for r149481 dated by 2nd Feb 2012:

2012-03-08 07:06:20 +00:00

Trace.cpp

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

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

TypeBasedAliasAnalysis.cpp

…

ValueTracking.cpp

PHINode::hasConstantValue(): return undef if the PHI is fully recursive.

2012-07-03 21:15:40 +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))

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