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ab15095964
llvm-mirror/include/llvm/CodeGen
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Matthias Braun ab15095964 MachineFrameInfo: Simplify pristine register calculation. 
About pristine regsiters:
Pristine registers "hold a value that is useless to the current
function, but that must be preserved - they are callee saved registers
that have not been saved." This concept saves compile time as it frees
the prologue/epilogue inserter from adding every such register to every
basic blocks live-in list.

However the current code in getPristineRegs is formulated in a
complicated way: Inside the function prologue and epilogue all callee
saves are considered pristine, while in the rest of the code only the
non-saved ones are considered pristine.  This requires logic to
differentiate between prologue/epilogue and the rest and in the presence
of shrink-wrapping this even becomes complicated/expensive.  It's also
unnecessary because the prologue epilogue inserters already mark
callee-save registers that are saved/restores properly in the respective
blocks in the prologue/epilogue (see updateLiveness() in
PrologueEpilogueInserter.cpp). So only declaring non-saved/restored
callee saved registers as pristine just works.

Differential Revision: http://reviews.llvm.org/D10101

llvm-svn: 238524
2015-05-28 23:20:35 +00:00
..
MIRParser Resubmit r237954 (MIR Serialization: print and parse LLVM IR using MIR format). 2015-05-27 18:02:19 +00:00
PBQP Add more missing #includes, found by modules build. 2015-05-11 22:41:07 +00:00
Analysis.h
AsmPrinter.h Make EmitFunctionHeader virtual 2015-05-26 17:33:15 +00:00
BasicTTIImpl.h [X86] Disable loop unrolling in loop vectorization pass when VF is 1. 2015-05-06 17:12:25 +00:00
CalcSpillWeights.h
CallingConvLower.h Remove 3 includes from MCInstrDesc.h and explicitly include them where needed 2015-05-15 21:58:42 +00:00
CommandFlags.h Remove NoFramePointerElim and NoFramePointerElimOverride from TargetOptions and 2015-05-26 20:17:20 +00:00
DAGCombine.h
DFAPacketizer.h
DIE.h AsmPrinter: Stop exposing underlying DIE children list, NFC 2015-05-28 19:56:34 +00:00
DIEValue.def Reapply "AsmPrinter: Change DIEValue to be stored by value" 2015-05-27 22:14:58 +00:00
DwarfStringPoolEntry.h AsmPrinter: Avoid creating symbols in DwarfStringPool 2015-05-24 16:58:59 +00:00
EdgeBundles.h
FastISel.h
FunctionLoweringInfo.h [StatepointLowering] Support of the gc.relocates for invoke statepoints. 2015-05-20 11:37:25 +00:00
GCMetadata.h
GCMetadataPrinter.h
GCs.h Prune CRLFs. 2015-05-25 01:43:23 +00:00
GCStrategy.h [gcroot] Remove unused items from an enum 2015-04-02 05:02:16 +00:00
IntrinsicLowering.h
ISDOpcodes.h Add SDNodes for umin, umax, smin and smax. 2015-05-15 09:03:15 +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 IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
LinkAllAsmWriterComponents.h
LinkAllCodegenComponents.h Add a GCStrategy for CoreCLR 2015-05-20 01:07:23 +00:00
LiveInterval.h Recommit r231168: unique_ptrify LiveRange::segmentSet 2015-03-04 01:20:33 +00:00
LiveIntervalAnalysis.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
LiveIntervalUnion.h
LivePhysRegs.h Refactor UpdatePredRedefs and StepForward to avoid duplication. NFC 2015-05-05 20:14:22 +00:00
LiveRangeEdit.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
LiveRegMatrix.h
LiveStackAnalysis.h Recommit r231175: Change LiveStackAnalysis::SS2IntervalMap from std::map to std::unordered_map 2015-03-04 01:15:53 +00:00
LiveVariables.h
MachineBasicBlock.h MachineBasicBlock: Cleanup computeRegisterLiveness() 2015-05-27 05:12:39 +00:00
MachineBlockFrequencyInfo.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachineBranchProbabilityInfo.h
MachineCombinerPattern.h
MachineConstantPool.h
MachineDominanceFrontier.h
MachineDominators.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachineFrameInfo.h MachineFrameInfo: Simplify pristine register calculation. 2015-05-28 23:20:35 +00:00
MachineFunction.h
MachineFunctionAnalysis.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachineFunctionPass.h
MachineInstr.h Add support for the convergent flag at the MC and MachineInstr levels. 2015-05-28 18:33:39 +00:00
MachineInstrBuilder.h IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
MachineInstrBundle.h
MachineJumpTableInfo.h
MachineLoopInfo.h
MachineMemOperand.h [BranchFolding] Remove MMOs during tail merge to preserve dependencies. 2015-03-10 16:22:52 +00:00
MachineModuleInfo.h IR: Give 'DI' prefix to debug info metadata 2015-04-29 16:38:44 +00:00
MachineModuleInfoImpls.h Clear the stub map in getSortedStubs. 2015-04-07 12:59:28 +00:00
MachineOperand.h Add ChangeTo* to MachineOperand for symbols 2015-05-06 17:05:54 +00:00
MachinePassRegistry.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachinePostDominators.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachineRegionInfo.h Remove empty non-virtual destructors or mark them =default when non-public 2015-04-11 15:32:26 +00:00
MachineRegisterInfo.h MachineRegisterInfo: Make it clear that hints are for vregs 2015-04-03 00:18:33 +00:00
MachineScheduler.h Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
MachineSSAUpdater.h
MachineTraceMetrics.h
MachineValueType.h Add support for v1i128 type. 2015-04-17 16:11:05 +00:00
MachORelocation.h
MIRYamlMapping.h MIR Serialization: print and parse machine function names. 2015-05-28 22:41:12 +00:00
Passes.h Resubmit r237954 (MIR Serialization: print and parse LLVM IR using MIR format). 2015-05-27 18:02:19 +00:00
PBQPRAConstraint.h
PseudoSourceValue.h
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
RegisterPressure.h Remove declarations for nonexistent methods 2015-04-01 21:16:02 +00:00
RegisterScavenging.h remove names from comments, fix typos; NFC 2015-05-22 15:38:24 +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 Use 'override/final' instead of 'virtual' for overridden methods 2015-04-11 02:11:45 +00:00
ScheduleDFS.h
ScheduleHazardRecognizer.h
SchedulerRegistry.h
ScoreboardHazardRecognizer.h
SelectionDAG.h SDAG: Give SDDbgValues their own allocator (and reset it) 2015-05-22 05:45:19 +00:00
SelectionDAGISel.h Reapply r235977 "[DebugInfo] Add debug locations to constant SD nodes" 2015-04-28 14:05:47 +00:00
SelectionDAGNodes.h Revert r237046. See the testcase on the thread where r237046 was committed. 2015-05-13 23:41:47 +00:00
SlotIndexes.h
StackMaps.h [Statepoints] Support for "patchable" statepoints. 2015-05-12 23:52:24 +00:00
StackProtector.h
TargetLoweringObjectFileImpl.h Move alignment from MCSectionData to MCSection. 2015-05-21 19:20:38 +00:00
TargetSchedule.h TargetSchedule: factor out common code; NFC 2015-05-14 18:01:13 +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 Add support for v1i128 type. 2015-04-17 16:11:05 +00:00
VirtRegMap.h
WinEHFuncInfo.h [WinEH] Start inserting state number stores for C++ EH 2015-05-28 22:00:24 +00:00