llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-02-21 06:30:16 +00:00

History

David Majnemer 77e22b7836 ValueTracking: ComputeNumSignBits should tolerate misshapen phi nodes

PHI nodes can have zero operands in the middle of a transform.  It is
expected that utilities in Analysis don't freak out when this happens.

Note that it is considered invalid to allow these misshapen phi nodes to
make it to another pass.

This fixes PR22086.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225126 91177308-0d34-0410-b5e6-96231b3b80d8

2015-01-04 07:06:53 +00:00

IPA

Remove the unused FindUsedTypes pass.

2014-11-24 20:53:26 +00:00

AliasAnalysis.cpp

Sink store based on alias analysis

2014-12-15 14:09:53 +00:00

AliasAnalysisCounter.cpp

[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

2014-04-15 04:59:12 +00:00

AliasAnalysisEvaluator.cpp

AA metadata refactoring (introduce AAMDNodes)

2014-07-24 12:16:19 +00:00

AliasDebugger.cpp

[C++11] Add 'override' keyword to virtual methods that override their base class.

2014-03-05 07:30:04 +00:00

AliasSetTracker.cpp

AliasSet: Simplify mergeSetIn

2014-11-19 19:36:18 +00:00

Analysis.cpp

Revert "Don't make assumptions about the name of private global variables."

2014-11-15 02:03:53 +00:00

AssumptionTracker.cpp

Clean up assume intrinsic pattern matching, no need to check that the argument is a value.

2014-10-25 18:09:01 +00:00

BasicAliasAnalysis.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

BlockFrequencyInfo.cpp

Revert "Introduce a string_ostream string builder facilty"

2014-06-26 22:52:05 +00:00

BlockFrequencyInfoImpl.cpp

BFI: Saturate when combining edges to a successor

2014-12-05 19:13:42 +00:00

BranchProbabilityInfo.cpp

IR: Split Metadata from Value

2014-12-09 18:38:53 +00:00

CaptureTracking.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

CFG.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

CFGPrinter.cpp

Modernize raw_fd_ostream's constructor a bit.

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

CFLAliasAnalysis.cpp

Remove redundant virtual on overriden functions.

2014-11-14 19:06:36 +00:00

CGSCCPassManager.cpp

[PM] Add a new-PM-style CGSCC pass manager using the newly added

2014-04-21 11:12:00 +00:00

CMakeLists.txt

Add file to CMake build as well.

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

CodeMetrics.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

ConstantFolding.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

CostModel.cpp

[CostModel][x86] Improved cost model for alternate shuffles.

2014-07-03 22:24:18 +00:00

Delinearization.cpp

remove BasePointer before delinearizing

2014-05-27 22:41:51 +00:00

DependenceAnalysis.cpp

[DependenceAnalysis] Allow subscripts of different types

2014-11-16 16:52:44 +00:00

DominanceFrontier.cpp

Templatify DominanceFrontier.

2014-07-12 21:59:52 +00:00

DomPrinter.cpp

[PM] Split DominatorTree into a concrete analysis result object which

2014-01-13 13:07:17 +00:00

FunctionTargetTransformInfo.cpp

Add a new pass FunctionTargetTransformInfo. This pass serves as a

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

InstCount.cpp

[Modules] Fix potential ODR violations by sinking the DEBUG_TYPE

2014-04-22 02:48:03 +00:00

InstructionSimplify.cpp

InstSimplify: Don't bother if getScalarSizeInBits returns zero

2014-12-20 04:45:33 +00:00

Interval.cpp

Revert "[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges."

2014-07-21 17:06:51 +00:00

IntervalPartition.cpp

[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

2014-04-15 04:59:12 +00:00

IVUsers.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

JumpInstrTableInfo.cpp

Add Forward Control-Flow Integrity.

2014-11-11 21:08:02 +00:00

LazyCallGraph.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

LazyValueInfo.cpp

LazyValueInfo: Actually re-visit partially solved block-values in solveBlockValue()

2014-11-25 17:23:05 +00:00

LibCallAliasAnalysis.cpp

[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

2014-04-15 04:59:12 +00:00

LibCallSemantics.cpp

remove function names from comments; NFC

2014-10-21 18:26:57 +00:00

Lint.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

LLVMBuild.txt

…

Loads.cpp

Revert r220349 to re-instate r220277 with a fix for PR21330 -- quite

2014-11-25 08:20:27 +00:00

LoopInfo.cpp

Revert "IR: MDNode => Value"

2014-11-11 21:30:22 +00:00

LoopPass.cpp

Fix assertion in LICM doFinalization()

2014-09-24 16:48:31 +00:00

Makefile

…

MemDepPrinter.cpp

[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

2014-04-15 04:59:12 +00:00

MemoryBuiltins.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

MemoryDependenceAnalysis.cpp

Remove redundant assignment.

2014-12-19 11:29:34 +00:00

ModuleDebugInfoPrinter.cpp

[C++11] Change DebugInfoFinder to use range-based loops

2014-03-18 09:41:07 +00:00

NoAliasAnalysis.cpp

Simplify code. No functionality change.

2014-10-05 12:21:57 +00:00

PHITransAddr.cpp

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

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

PostDominators.cpp

[Modules] Fix potential ODR violations by sinking the DEBUG_TYPE

2014-04-22 02:48:03 +00:00

PtrUseVisitor.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

README.txt

…

RegionInfo.cpp

Fix msc17 build. RegionInfo::RegionInfo::recalculate() doesn't make sense.

2014-07-20 03:57:51 +00:00

RegionPass.cpp

Templatify RegionInfo so it works on MachineBasicBlocks

2014-07-19 18:29:29 +00:00

RegionPrinter.cpp

Templatify RegionInfo so it works on MachineBasicBlocks

2014-07-19 18:29:29 +00:00

ScalarEvolution.cpp

Teach ScalarEvolution to exploit min and max expressions when proving

2014-12-15 22:50:15 +00:00

ScalarEvolutionAliasAnalysis.cpp

AA metadata refactoring (introduce AAMDNodes)

2014-07-24 12:16:19 +00:00

ScalarEvolutionExpander.cpp

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

ScalarEvolutionNormalization.cpp

Fix typos in comments, NFC

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

ScopedNoAliasAA.cpp

Revert "IR: MDNode => Value"

2014-11-11 21:30:22 +00:00

SparsePropagation.cpp

[Modules] Fix potential ODR violations by sinking the DEBUG_TYPE

2014-04-22 02:48:03 +00:00

StratifiedSets.h

Update SetVector to rely on the underlying set's insert to return a pair<iterator, bool>

2014-11-19 07:49:26 +00:00

TargetTransformInfo.cpp

Loop Vectorizer minor changes in the code -

2014-12-14 09:43:50 +00:00

Trace.cpp

Put the functionality for printing a value to a raw_ostream as an

2014-01-09 02:29:41 +00:00

TypeBasedAliasAnalysis.cpp

IR: Split Metadata from Value

2014-12-09 18:38:53 +00:00

ValueTracking.cpp

ValueTracking: ComputeNumSignBits should tolerate misshapen phi nodes

2015-01-04 07:06:53 +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))

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