Jingyue Wu 5733100450 Divergence analysis for GPU programs ...

Summary:
Some optimizations such as jump threading and loop unswitching can negatively
affect performance when applied to divergent branches. The divergence analysis
added in this patch conservatively estimates which branches in a GPU program
can diverge. This information can then help LLVM to run certain optimizations
selectively.

Test Plan: test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll

Reviewers: resistor, hfinkel, eliben, meheff, jholewinski

Subscribers: broune, bjarke.roune, madhur13490, tstellarAMD, dberlin, echristo, jholewinski, llvm-commits

Differential Revision: http://reviews.llvm.org/D8576

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234567 91177308-0d34-0410-b5e6-96231b3b80d8

2015-04-10 05:03:50 +00:00

..

PBQP

[PBQP] NDEBUG guards added around code needed for assert.

2015-02-17 07:45:06 +00:00

Analysis.h

Fold a loop for array processing in ComputeLinearIndex

2015-01-14 05:33:01 +00:00

AsmPrinter.h

Change getISAEncoding to use the target triple to determine

2015-03-21 03:13:01 +00:00

BasicTTIImpl.h

Divergence analysis for GPU programs

2015-04-10 05:03:50 +00:00

CalcSpillWeights.h

[PBQP] Tweak spill costs and coalescing benefits

2014-11-04 20:51:24 +00:00

CallingConvLower.h

ARM: treat [N x i32] and [N x i64] as AAPCS composite types

2015-02-24 17:22:34 +00:00

CommandFlags.h

Add r228980 back.

2015-02-17 20:48:01 +00:00

DAGCombine.h

…

DFAPacketizer.h

Remove the TargetMachine from DFAPacketizer since it was only

2014-10-14 01:03:16 +00:00

DIE.h

Add DIEInteger::setValue() method.

2015-03-06 23:22:46 +00:00

EdgeBundles.h

[modules] "Specialize" a function by actually specializing a function template

2014-04-24 18:27:29 +00:00

FastISel.h

[cleanup] Re-sort all the #include lines in LLVM using

2015-01-14 11:23:27 +00:00

FunctionLoweringInfo.h

Remove dead code for llvm.eh.selector in the old EH model

2015-01-14 18:49:39 +00:00

GCMetadata.h

Revert GCStrategy ownership changes

2015-01-26 18:26:35 +00:00

GCMetadataPrinter.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

GCs.h

clang-format all the GC related files (NFC)

2015-01-16 23:16:12 +00:00

GCStrategy.h

[gcroot] Remove unused items from an enum

2015-04-02 05:02:16 +00:00

IntrinsicLowering.h

Rename some member variables from TD to DL.

2014-02-18 15:33:12 +00:00

ISDOpcodes.h

Reverted 230471 - gather scatter handling in table gen.

2015-03-01 08:23:41 +00:00

LatencyPriorityQueue.h

Remove LatencyPriorityQueue::dump because it relies on an implicit copy ctor which is deprecated in C++11 (due to the presence of a user-declare dtor in the base class)

2015-03-03 21:16:56 +00:00

LexicalScopes.h

DebugLoc: Remove getFromDILexicalBlock()

2015-03-30 23:47:26 +00:00

LinkAllAsmWriterComponents.h

…

LinkAllCodegenComponents.h

Introduce an example statepoint GC strategy

2015-01-07 19:07:50 +00:00

LiveInterval.h

Recommit r231168: unique_ptrify LiveRange::segmentSet

2015-03-04 01:20:33 +00:00

LiveIntervalAnalysis.h

[LiveIntervalAnalysis] Speed up creation of live ranges for physical registers

2015-02-06 18:42:41 +00:00

LiveIntervalUnion.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

LivePhysRegs.h

Fix uses of reserved identifiers starting with an underscore followed by an uppercase letter

2015-03-16 18:06:57 +00:00

LiveRangeEdit.h

Remove unnecessary getTarget call now that the subtarget is cached

2014-09-03 20:36:26 +00:00

LiveRegMatrix.h

[C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API.

2014-04-21 09:34:48 +00:00

LiveStackAnalysis.h

Recommit r231175: Change LiveStackAnalysis::SS2IntervalMap from std::map to std::unordered_map

2015-03-04 01:15:53 +00:00

LiveVariables.h

CodeGen/LiveVariables: hoist out code in nested loops

2014-08-25 01:59:49 +00:00

MachineBasicBlock.h

CodeGen: assert an instruction is being inserted with the correct iterator.

2014-11-14 00:34:59 +00:00

MachineBlockFrequencyInfo.h

blockfreq: Remove unnecessary template parameters

2014-04-11 23:21:02 +00:00

MachineBranchProbabilityInfo.h

blockfreq: Use const in MachineBlockFrequencyInfo

2014-03-25 18:01:32 +00:00

MachineCombinerPattern.h

MachineCombiner Pass for selecting faster instruction

2014-08-03 21:35:39 +00:00

MachineConstantPool.h

CodeGen: Add a getSectionKind method to MachineConstantPoolEntry

2014-07-14 22:06:29 +00:00

MachineDominanceFrontier.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

MachineDominators.h

MachineDominators: Move applySplitCriticalEdges into the cpp file.

2015-02-27 23:13:13 +00:00

MachineFrameInfo.h

[WinEH] Sink UnwindHelp completely out of IR

2015-04-03 22:32:26 +00:00

MachineFunction.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

MachineFunctionAnalysis.h

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

2014-03-07 09:26:03 +00:00

MachineFunctionPass.h

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

2014-03-07 09:26:03 +00:00

MachineInstr.h

DebugInfo: Remove DIDescriptor::Verify()

2015-04-06 19:49:39 +00:00

MachineInstrBuilder.h

CodeGen: Stop using DIDescriptor::is*() and auto-casting

2015-04-06 23:27:40 +00:00

MachineInstrBundle.h

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

2014-04-14 00:51:57 +00:00

MachineJumpTableInfo.h

…

MachineLoopInfo.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

MachineMemOperand.h

[BranchFolding] Remove MMOs during tail merge to preserve dependencies.

2015-03-10 16:22:52 +00:00

MachineModuleInfo.h

Clear the stub map in getSortedStubs.

2015-04-07 12:59:28 +00:00

MachineModuleInfoImpls.h

Clear the stub map in getSortedStubs.

2015-04-07 12:59:28 +00:00

MachineOperand.h

Rewrite MachineOperand::print and MachineInstr::print to avoid

2015-02-27 00:11:34 +00:00

MachinePassRegistry.h

Refactoring cl::parser construction and initialization.

2015-01-22 21:01:12 +00:00

MachinePostDominators.h

Fix typos in comments, NFC

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

MachineRegionInfo.h

Templatify RegionInfo so it works on MachineBasicBlocks

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

MachineRegisterInfo.h

MachineRegisterInfo: Make it clear that hints are for vregs

2015-04-03 00:18:33 +00:00

MachineScheduler.h

[cleanup] Re-sort all the #include lines in LLVM using

2015-01-14 11:23:27 +00:00

MachineSSAUpdater.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

MachineTraceMetrics.h

Canonicalize header guards into a common format.

2014-08-13 16:26:38 +00:00

MachineValueType.h

Make VTs and UnicodeCharSet ctors constexpr if the compiler supports it.

2015-03-01 18:10:07 +00:00

MachORelocation.h

…

Passes.h

Reland r229944: EH: Prune unreachable resume instructions during Dwarf EH preparation

2015-03-09 22:45:16 +00:00

PBQPRAConstraint.h

Remove redundant virtual on overriden functions.

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

PseudoSourceValue.h

Fix broken build of llvm using clang.

2014-04-15 08:10:46 +00:00

RegAllocPBQP.h

[PBQP] Do not add an edge between nodes with totally disjoint allowed registers

2015-03-01 20:39:34 +00:00

RegAllocRegistry.h

…

RegisterClassInfo.h

[C++11] Replace OwningPtr with std::unique_ptr in places where it doesn't break the API.

2014-04-21 09:34:48 +00:00

RegisterPressure.h

Remove declarations for nonexistent methods

2015-04-01 21:16:02 +00:00

RegisterScavenging.h

Changed the liveness tracking in the RegisterScavenger

2014-08-04 23:07:49 +00:00

ResourcePriorityQueue.h

unique_ptrify ResourcePriorityQueue::ResourceModel

2015-03-03 20:49:08 +00:00

RuntimeLibcalls.h

SDAG: Merge the meat of two ExpandAtomic implementations.

2015-03-05 20:04:29 +00:00

ScheduleDAG.h

Remove the explicit SUnitIterator::operator= as the default is just fine

2015-03-03 21:17:00 +00:00

ScheduleDAGInstrs.h

Cleanup: Delete seemingly unused reference to MachineDominatorTree from ScheduleDAGInstrs.

2014-08-20 20:57:26 +00:00

ScheduleDFS.h

Move remaining LLVM_ENABLE_DUMP conditionals out of the headers

2014-07-01 21:19:13 +00:00

ScheduleHazardRecognizer.h

Add two additional hazard recognizer functions

2013-12-11 22:33:43 +00:00

SchedulerRegistry.h

…

ScoreboardHazardRecognizer.h

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

2014-04-14 00:51:57 +00:00

SelectionDAG.h

remove function/variable names from comments; NFC

2015-04-04 21:06:39 +00:00

SelectionDAGISel.h

Recommit r232027 with PR22883 fixed: Add infrastructure for support of multiple memory constraints.

2015-03-13 12:45:09 +00:00

SelectionDAGNodes.h

move helper function closer to use; NFC

2015-04-07 19:13:06 +00:00

SlotIndexes.h

Removing LLVM_EXPLICIT, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:00:20 +00:00

StackMaps.h

Remove dead calls and function arguments dealing with TRI in StackMaps.

2015-03-20 21:05:18 +00:00

StackProtector.h

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

2014-04-14 00:51:57 +00:00

TargetLoweringObjectFileImpl.h

Implement unique sections with an unique ID.

2015-04-04 18:02:01 +00:00

TargetSchedule.h

Change MCSchedModel to be a struct of statically initialized data.

2014-09-02 17:43:54 +00:00

ValueTypes.h

Make VTs and UnicodeCharSet ctors constexpr if the compiler supports it.

2015-03-01 18:10:07 +00:00

ValueTypes.td

Intrinsics: introduce llvm_any_ty aka ValueType Any

2015-01-22 20:14:38 +00:00

VirtRegMap.h

Removing LLVM_DELETED_FUNCTION, as MSVC 2012 was the last reason for requiring the macro. NFC; LLVM edition.

2015-02-15 22:54:22 +00:00

WinEHFuncInfo.h

[WinEHPrepare] Don't rely on the order of IR

2015-04-10 04:56:17 +00:00