Index: include/llvm/MC/MCSchedule.h =================================================================== --- include/llvm/MC/MCSchedule.h +++ include/llvm/MC/MCSchedule.h @@ -163,10 +163,17 @@ /// normally used by the LLVM machine schedulers, but that can be consumed by /// external tools like llvm-mca to improve the quality of the peformance /// analysis. -/// In future, the plan is to extend this struct with extra information (for -/// example: maximum number of instructions retired per cycle; actual size of -/// the reorder buffer; etc.). struct MCExtraProcessorInfo { + // ReorderBufferSize is the actual size of the reorder buffer in hardware. + // This value may differ from the value of field + // `MCSchedModel::MicroOpBufferSize`. External tools like llvm-mca should use + // this value to model the size of the reorder buffer in the retire control + // unit. A value of zero for this field is used for when the size is unknown. + unsigned ReorderBufferSize; + // Number of instructions retired per cycle. + // A value of zero means that there are no restrictions in the number of + // micro-ops that can be retired every cycle. + unsigned MaxRetirePerCycle; const MCRegisterFileDesc *RegisterFiles; unsigned NumRegisterFiles; const MCRegisterCostEntry *RegisterCostTable; Index: include/llvm/Target/TargetSchedule.td =================================================================== --- include/llvm/Target/TargetSchedule.td +++ include/llvm/Target/TargetSchedule.td @@ -443,7 +443,7 @@ SchedMachineModel SchedModel = ?; } -// Alow the definition of processor register files. +// Allow the definition of processor register files. // Each processor register file declares the number of physical registers, as // well as a optional register cost information. The cost of a register R is the // number of physical registers used to rename R (at register renaming stage). @@ -459,3 +459,20 @@ int NumPhysRegs = numPhysRegs; SchedMachineModel SchedModel = ?; } + +// Describe the retire control unit. +// A retire control unit specifies the size of the reorder buffer, as well as +// the maximum number of opcodes that can be retired every cycle. +// A value less-than-or-equal-to zero for field 'ReorderBufferSize' means: "the +// size is unknown". The idea is that external tools can fall-back to using +// field MicroOpBufferSize in SchedModel if the reorder buffer size is unknown. +// A zero or negative value for field 'MaxRetirePerCycle' means "no +// restrictions on the number of instructions retired per cycle". +// Models can optionally specify up to one instance of RetireControlUnit per +// scheduling model. +class RetireControlUnit { + int ReorderBufferSize = bufferSize; + int MaxRetirePerCycle = retirePerCycle; + SchedMachineModel SchedModel = ?; +} + Index: lib/Target/X86/X86ScheduleBtVer2.td =================================================================== --- lib/Target/X86/X86ScheduleBtVer2.td +++ lib/Target/X86/X86ScheduleBtVer2.td @@ -48,6 +48,11 @@ // Reference: www.realworldtech.com/jaguar/4/ def FpuPRF: RegisterFile<72, [VR64, VR128, VR256], [1, 1, 2]>; +// The out-of-order window for Jaguar is 64 entries. Up to 2 COPs per cycle are +// retired in-order by the RCU. +// Reference: www.realworldtech.com/jaguar/4/ +def RCU : RetireControlUnit<64, 2>; + // Integer Pipe Scheduler def JALU01 : ProcResGroup<[JALU0, JALU1]> { let BufferSize=20; Index: test/tools/llvm-mca/X86/BtVer2/dot-product.s =================================================================== --- test/tools/llvm-mca/X86/BtVer2/dot-product.s +++ test/tools/llvm-mca/X86/BtVer2/dot-product.s @@ -59,15 +59,14 @@ # CHECK: [0,0] DeeER. . . vmulps %xmm0, %xmm1, %xmm2 # CHECK-NEXT: [0,1] D==eeeER . . vhaddps %xmm2, %xmm2, %xmm3 # CHECK-NEXT: [0,2] .D====eeeER . vhaddps %xmm3, %xmm3, %xmm4 - # CHECK: [1,0] .DeeE-----R . vmulps %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [1,1] . D=eeeE--R . vhaddps %xmm2, %xmm2, %xmm3 +# CHECK-NEXT: [1,1] . D=eeeE---R . vhaddps %xmm2, %xmm2, %xmm3 # CHECK-NEXT: [1,2] . D====eeeER . vhaddps %xmm3, %xmm3, %xmm4 - -# CHECK: [2,0] . DeeE----R . vmulps %xmm0, %xmm1, %xmm2 +# CHECK: [2,0] . DeeE-----R . vmulps %xmm0, %xmm1, %xmm2 # CHECK-NEXT: [2,1] . D====eeeER . vhaddps %xmm2, %xmm2, %xmm3 # CHECK-NEXT: [2,2] . D======eeeER vhaddps %xmm3, %xmm3, %xmm4 + # CHECK: Average Wait times (based on the timeline view): # CHECK-NEXT: [0]: Executions # CHECK-NEXT: [1]: Average time spent waiting in a scheduler's queue @@ -75,6 +74,6 @@ # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage # CHECK: [0] [1] [2] [3] -# CHECK-NEXT: 0. 3 1.0 1.0 3.0 vmulps %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: 1. 3 3.3 0.7 0.7 vhaddps %xmm2, %xmm2, %xmm3 +# CHECK-NEXT: 0. 3 1.0 1.0 3.3 vmulps %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: 1. 3 3.3 0.7 1.0 vhaddps %xmm2, %xmm2, %xmm3 # CHECK-NEXT: 2. 3 5.7 0.0 0.0 vhaddps %xmm3, %xmm3, %xmm4 Index: test/tools/llvm-mca/X86/BtVer2/pipes-fpu.s =================================================================== --- test/tools/llvm-mca/X86/BtVer2/pipes-fpu.s +++ test/tools/llvm-mca/X86/BtVer2/pipes-fpu.s @@ -75,24 +75,23 @@ # CHECK-NEXT: - - - - 42.00 - 2.00 - - - - - - - vsqrtps %ymm0, %ymm2 -# CHECK: Timeline view: -# CHECK-NEXT: 0123456789 0123456789 0123456789 -# CHECK-NEXT: Index 0123456789 0123456789 0123456789 01234567 -# CHECK: [0,0] DeeeeER . . . . . . . . . . . . . vpmulld %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [0,1] .DeE--R . . . . . . . . . . . . . vpand %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [0,2] . DeeeER . . . . . . . . . . . . . vcvttps2dq %xmm0, %xmm2 -# CHECK-NEXT: [0,3] . DeeE-R . . . . . . . . . . . . . vpclmulqdq $0, %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [0,4] . DeeeER . . . . . . . . . . . . . vaddps %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [0,5] . DeeeeeeeeeeeeeeeeeeeeeER . . . . . . . . . vsqrtps %xmm0, %xmm2 -# CHECK-NEXT: [0,6] . DeeeE-----------------R . . . . . . . . . vaddps %ymm0, %ymm1, %ymm2 -# CHECK-NEXT: [0,7] . D===================eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeER vsqrtps %ymm0, %ymm2 - -# CHECK: [1,0] . .DeeeeE--------------------------------------------------------R vpmulld %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [1,1] . . DeE----------------------------------------------------------R vpand %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [1,2] . . DeeeE-------------------------------------------------------R vcvttps2dq %xmm0, %xmm2 -# CHECK-NEXT: [1,3] . . DeeE--------------------------------------------------------R vpclmulqdq $0, %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: [1,4] . . DeeeE------------------------------------------------------R vaddps %xmm0, %xmm1, %xmm2 +# CHECK: Timeline view: +# CHECK-NEXT: 0123456789 0123456789 0123456789 0 +# CHECK-NEXT: Index 0123456789 0123456789 0123456789 0123456789 +# CHECK: [0,0] DeeeeER . . . . . . . . . . . . . vpmulld %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [0,1] .DeE--R . . . . . . . . . . . . . vpand %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [0,2] . DeeeER . . . . . . . . . . . . . vcvttps2dq %xmm0, %xmm2 +# CHECK-NEXT: [0,3] . DeeE-R . . . . . . . . . . . . . vpclmulqdq $0, %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [0,4] . DeeeER . . . . . . . . . . . . . vaddps %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [0,5] . DeeeeeeeeeeeeeeeeeeeeeER . . . . . . . . . vsqrtps %xmm0, %xmm2 +# CHECK-NEXT: [0,6] . DeeeE-----------------R . . . . . . . . . vaddps %ymm0, %ymm1, %ymm2 +# CHECK-NEXT: [0,7] . D===================eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeER . vsqrtps %ymm0, %ymm2 +# CHECK: [1,0] . .DeeeeE--------------------------------------------------------R . vpmulld %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [1,1] . . DeE-----------------------------------------------------------R. vpand %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [1,2] . . DeeeE--------------------------------------------------------R. vcvttps2dq %xmm0, %xmm2 +# CHECK-NEXT: [1,3] . . DeeE----------------------------------------------------------R vpclmulqdq $0, %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: [1,4] . . DeeeE--------------------------------------------------------R vaddps %xmm0, %xmm1, %xmm2 # CHECK: Average Wait times (based on the timeline view): @@ -101,12 +100,12 @@ # CHECK-NEXT: [2]: Average time spent waiting in a scheduler's queue while ready # CHECK-NEXT: [3]: Average time elapsed from WB until retire stage -# CHECK: [0] [1] [2] [3] +# CHECK: [0] [1] [2] [3] # CHECK-NEXT: 0. 2 1.0 1.0 28.0 vpmulld %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: 1. 2 1.0 1.0 30.0 vpand %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: 2. 2 1.0 1.0 27.5 vcvttps2dq %xmm0, %xmm2 -# CHECK-NEXT: 3. 2 1.0 1.0 28.5 vpclmulqdq $0, %xmm0, %xmm1, %xmm2 -# CHECK-NEXT: 4. 2 1.0 1.0 27.0 vaddps %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: 1. 2 1.0 1.0 30.5 vpand %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: 2. 2 1.0 1.0 28.0 vcvttps2dq %xmm0, %xmm2 +# CHECK-NEXT: 3. 2 1.0 1.0 29.5 vpclmulqdq $0, %xmm0, %xmm1, %xmm2 +# CHECK-NEXT: 4. 2 1.0 1.0 28.0 vaddps %xmm0, %xmm1, %xmm2 # CHECK-NEXT: 5. 1 1.0 1.0 0.0 vsqrtps %xmm0, %xmm2 # CHECK-NEXT: 6. 1 1.0 1.0 17.0 vaddps %ymm0, %ymm1, %ymm2 # CHECK-NEXT: 7. 1 20.0 20.0 0.0 vsqrtps %ymm0, %ymm2 Index: test/tools/llvm-mca/X86/BtVer2/register-files-5.s =================================================================== --- test/tools/llvm-mca/X86/BtVer2/register-files-5.s +++ test/tools/llvm-mca/X86/BtVer2/register-files-5.s @@ -72,27 +72,27 @@ # CHECK: [0,0] DeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeER . . . . . . vdivps %ymm0, %ymm0, %ymm1 # CHECK-NEXT: [0,1] .DeeeE----------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm2 -# CHECK-NEXT: [0,2] . D=eeeE--------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm3 -# CHECK-NEXT: [0,3] . D==eeeE------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm4 -# CHECK-NEXT: [0,4] . D===eeeE----------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm5 -# CHECK-NEXT: [0,5] . D====eeeE--------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm6 -# CHECK-NEXT: [0,6] . .D=====eeeE------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm7 -# CHECK-NEXT: [0,7] . . D======eeeE----------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm8 -# CHECK-NEXT: [0,8] . . D=======eeeE--------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm9 -# CHECK-NEXT: [0,9] . . D========eeeE------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm10 -# CHECK-NEXT: [0,10] . . D=========eeeE----------------R . . . . . . vaddps %ymm0, %ymm0, %ymm11 -# CHECK-NEXT: [0,11] . . .D==========eeeE--------------R . . . . . . vaddps %ymm0, %ymm0, %ymm12 -# CHECK-NEXT: [0,12] . . . D===========eeeE------------R . . . . . . vaddps %ymm0, %ymm0, %ymm13 -# CHECK-NEXT: [0,13] . . . D============eeeE----------R . . . . . . vaddps %ymm0, %ymm0, %ymm14 -# CHECK-NEXT: [0,14] . . . D=============eeeE--------R . . . . . . vaddps %ymm0, %ymm0, %ymm15 -# CHECK-NEXT: [0,15] . . . D==============eeeE------R . . . . . . vaddps %ymm2, %ymm0, %ymm0 -# CHECK-NEXT: [0,16] . . . .D================eeeE---R . . . . . . vaddps %ymm2, %ymm0, %ymm3 -# CHECK-NEXT: [0,17] . . . . D=================eeeE-R . . . . . . vaddps %ymm2, %ymm0, %ymm4 -# CHECK-NEXT: [0,18] . . . . D==================eeeER . . . . . . vaddps %ymm2, %ymm0, %ymm5 -# CHECK-NEXT: [0,19] . . . . D===================eeeER . . . . . . vaddps %ymm2, %ymm0, %ymm6 -# CHECK-NEXT: [0,20] . . . . D====================eeeER . . . . . vaddps %ymm2, %ymm0, %ymm7 -# CHECK-NEXT: [0,21] . . . . .D=====================eeeER . . . . . vaddps %ymm2, %ymm0, %ymm8 -# CHECK-NEXT: [0,22] . . . . . D======================eeeER. . . . . vaddps %ymm2, %ymm0, %ymm9 +# CHECK-NEXT: [0,2] . D=eeeE---------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm3 +# CHECK-NEXT: [0,3] . D==eeeE-------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm4 +# CHECK-NEXT: [0,4] . D===eeeE------------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm5 +# CHECK-NEXT: [0,5] . D====eeeE----------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm6 +# CHECK-NEXT: [0,6] . .D=====eeeE---------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm7 +# CHECK-NEXT: [0,7] . . D======eeeE-------------------------R . . . . . . vaddps %ymm0, %ymm0, %ymm8 +# CHECK-NEXT: [0,8] . . D=======eeeE------------------------R. . . . . . vaddps %ymm0, %ymm0, %ymm9 +# CHECK-NEXT: [0,9] . . D========eeeE----------------------R. . . . . . vaddps %ymm0, %ymm0, %ymm10 +# CHECK-NEXT: [0,10] . . D=========eeeE---------------------R . . . . . vaddps %ymm0, %ymm0, %ymm11 +# CHECK-NEXT: [0,11] . . .D==========eeeE-------------------R . . . . . vaddps %ymm0, %ymm0, %ymm12 +# CHECK-NEXT: [0,12] . . . D===========eeeE------------------R . . . . . vaddps %ymm0, %ymm0, %ymm13 +# CHECK-NEXT: [0,13] . . . D============eeeE----------------R . . . . . vaddps %ymm0, %ymm0, %ymm14 +# CHECK-NEXT: [0,14] . . . D=============eeeE---------------R . . . . . vaddps %ymm0, %ymm0, %ymm15 +# CHECK-NEXT: [0,15] . . . D==============eeeE-------------R . . . . . vaddps %ymm2, %ymm0, %ymm0 +# CHECK-NEXT: [0,16] . . . .D================eeeE-----------R . . . . . vaddps %ymm2, %ymm0, %ymm3 +# CHECK-NEXT: [0,17] . . . . D=================eeeE---------R . . . . . vaddps %ymm2, %ymm0, %ymm4 +# CHECK-NEXT: [0,18] . . . . D==================eeeE--------R. . . . . vaddps %ymm2, %ymm0, %ymm5 +# CHECK-NEXT: [0,19] . . . . D===================eeeE------R. . . . . vaddps %ymm2, %ymm0, %ymm6 +# CHECK-NEXT: [0,20] . . . . D====================eeeE-----R . . . . vaddps %ymm2, %ymm0, %ymm7 +# CHECK-NEXT: [0,21] . . . . .D=====================eeeE---R . . . . vaddps %ymm2, %ymm0, %ymm8 +# CHECK-NEXT: [0,22] . . . . . D======================eeeE--R . . . . vaddps %ymm2, %ymm0, %ymm9 # CHECK-NEXT: [0,23] . . . . . D=======================eeeER . . . . vaddps %ymm2, %ymm0, %ymm10 # CHECK-NEXT: [0,24] . . . . . D========================eeeER . . . . vaddps %ymm2, %ymm0, %ymm11 # CHECK-NEXT: [0,25] . . . . . D=========================eeeER . . . vaddps %ymm2, %ymm0, %ymm12 Index: tools/llvm-mca/Backend.h =================================================================== --- tools/llvm-mca/Backend.h +++ tools/llvm-mca/Backend.h @@ -68,9 +68,9 @@ HWS(llvm::make_unique(this, Subtarget.getSchedModel(), LoadQueueSize, StoreQueueSize, AssumeNoAlias)), - DU(llvm::make_unique( - this, STI, MRI, Subtarget.getSchedModel().MicroOpBufferSize, - RegisterFileSize, MaxRetirePerCycle, DispatchWidth, HWS.get())), + DU(llvm::make_unique(this, Subtarget.getSchedModel(), MRI, + RegisterFileSize, MaxRetirePerCycle, + DispatchWidth, HWS.get())), SM(Source), Cycles(0) { HWS->setDispatchUnit(DU.get()); } Index: tools/llvm-mca/Dispatch.h =================================================================== --- tools/llvm-mca/Dispatch.h +++ tools/llvm-mca/Dispatch.h @@ -191,12 +191,15 @@ std::vector Queue; DispatchUnit *Owner; + void initialize(const llvm::MCSchedModel &SM); + public: - RetireControlUnit(unsigned NumSlots, unsigned RPC, DispatchUnit *DU) + RetireControlUnit(const llvm::MCSchedModel &SM, unsigned RetirePerCycle, + DispatchUnit *DU) : NextAvailableSlotIdx(0), CurrentInstructionSlotIdx(0), - AvailableSlots(NumSlots), MaxRetirePerCycle(RPC), Owner(DU) { - assert(NumSlots && "Expected at least one slot!"); - Queue.resize(NumSlots); + AvailableSlots(SM.MicroOpBufferSize), MaxRetirePerCycle(RetirePerCycle), + Owner(DU) { + initialize(SM); } bool isFull() const { return !AvailableSlots; } @@ -264,16 +267,14 @@ llvm::ArrayRef UsedPhysRegs); public: - DispatchUnit(Backend *B, const llvm::MCSubtargetInfo &STI, - const llvm::MCRegisterInfo &MRI, unsigned MicroOpBufferSize, - unsigned RegisterFileSize, unsigned MaxRetirePerCycle, - unsigned MaxDispatchWidth, Scheduler *Sched) + DispatchUnit(Backend *B, const llvm::MCSchedModel &SM, + const llvm::MCRegisterInfo &MRI, unsigned RegisterFileSize, + unsigned MaxRetirePerCycle, unsigned MaxDispatchWidth, + Scheduler *Sched) : DispatchWidth(MaxDispatchWidth), AvailableEntries(MaxDispatchWidth), CarryOver(0U), SC(Sched), - RAT(llvm::make_unique(STI.getSchedModel(), MRI, - RegisterFileSize)), - RCU(llvm::make_unique(MicroOpBufferSize, - MaxRetirePerCycle, this)), + RAT(llvm::make_unique(SM, MRI, RegisterFileSize)), + RCU(llvm::make_unique(SM, MaxRetirePerCycle, this)), Owner(B) {} unsigned getDispatchWidth() const { return DispatchWidth; } Index: tools/llvm-mca/Dispatch.cpp =================================================================== --- tools/llvm-mca/Dispatch.cpp +++ tools/llvm-mca/Dispatch.cpp @@ -251,6 +251,22 @@ } #endif +void RetireControlUnit::initialize(const MCSchedModel &SM) { + // Check if the scheduling model provides extra information about the machine + // processor. If so, then use that information to set the reorder buffer size + // and the maximum number of instructions retired per cycle. + if (SM.hasExtraProcessorInfo()) { + const MCExtraProcessorInfo &EPI = SM.getExtraProcessorInfo(); + if (EPI.ReorderBufferSize) + AvailableSlots = EPI.ReorderBufferSize; + if (!MaxRetirePerCycle) + MaxRetirePerCycle = EPI.MaxRetirePerCycle; + } + + assert(AvailableSlots && "Invalid reorder buffer size!"); + Queue.resize(AvailableSlots); +} + // Reserves a number of slots, and returns a new token. unsigned RetireControlUnit::reserveSlot(unsigned Index, unsigned NumMicroOps) { assert(isAvailable(NumMicroOps)); Index: utils/TableGen/CodeGenSchedule.h =================================================================== --- utils/TableGen/CodeGenSchedule.h +++ utils/TableGen/CodeGenSchedule.h @@ -235,9 +235,13 @@ // List of Register Files. std::vector RegisterFiles; + // Optional Retire Control Unit definition. + Record *RetireControlUnit; + CodeGenProcModel(unsigned Idx, std::string Name, Record *MDef, Record *IDef) : - Index(Idx), ModelName(std::move(Name)), ModelDef(MDef), ItinsDef(IDef) {} + Index(Idx), ModelName(std::move(Name)), ModelDef(MDef), ItinsDef(IDef), + RetireControlUnit(nullptr) {} bool hasItineraries() const { return !ItinsDef->getValueAsListOfDefs("IID").empty(); @@ -248,7 +252,7 @@ } bool hasExtraProcessorInfo() const { - return !RegisterFiles.empty(); + return RetireControlUnit || !RegisterFiles.empty(); } unsigned getProcResourceIdx(Record *PRDef) const; @@ -436,8 +440,12 @@ void collectSchedClasses(); + void collectRetireControlUnits(); + void collectRegisterFiles(); + void collectOptionalProcessorInfo(); + std::string createSchedClassName(Record *ItinClassDef, ArrayRef OperWrites, ArrayRef OperReads); Index: utils/TableGen/CodeGenSchedule.cpp =================================================================== --- utils/TableGen/CodeGenSchedule.cpp +++ utils/TableGen/CodeGenSchedule.cpp @@ -211,10 +211,34 @@ DEBUG(dbgs() << "\n+++ RESOURCE DEFINITIONS (collectProcResources) +++\n"); collectProcResources(); + // Collect optional processor description. + collectOptionalProcessorInfo(); + + checkCompleteness(); +} + +void CodeGenSchedModels::collectRetireControlUnits() { + RecVec Units = Records.getAllDerivedDefinitions("RetireControlUnit"); + + for (Record *RCU : Units) { + CodeGenProcModel &PM = getProcModel(RCU->getValueAsDef("SchedModel")); + if (PM.RetireControlUnit) { + PrintError(RCU->getLoc(), + "Expected a single RetireControlUnit definition"); + PrintNote(PM.RetireControlUnit->getLoc(), + "Previous definition of RetireControlUnit was here"); + } + PM.RetireControlUnit = RCU; + } +} + +/// Collect optional processor information. +void CodeGenSchedModels::collectOptionalProcessorInfo() { // Find register file definitions for each processor. collectRegisterFiles(); - checkCompleteness(); + // Collect processor RetireControlUnit descriptors if available. + collectRetireControlUnits(); } /// Gather all processor models. Index: utils/TableGen/SubtargetEmitter.cpp =================================================================== --- utils/TableGen/SubtargetEmitter.cpp +++ utils/TableGen/SubtargetEmitter.cpp @@ -608,6 +608,20 @@ OS << "};\n"; } +static void EmitRetireControlUnitInfo(const CodeGenProcModel &ProcModel, + raw_ostream &OS) { + long ReorderBufferSize = 0, MaxRetirePerCycle = 0; + if (Record *RCU = ProcModel.RetireControlUnit) { + ReorderBufferSize = + std::max(ReorderBufferSize, RCU->getValueAsInt("ReorderBufferSize")); + MaxRetirePerCycle = + std::max(MaxRetirePerCycle, RCU->getValueAsInt("MaxRetirePerCycle")); + } + + OS << ReorderBufferSize << ", // ReorderBufferSize\n "; + OS << MaxRetirePerCycle << ", // MaxRetirePerCycle\n "; +} + static void EmitRegisterFileInfo(const CodeGenProcModel &ProcModel, unsigned NumRegisterFiles, unsigned NumCostEntries, raw_ostream &OS) { @@ -683,6 +697,9 @@ OS << "\nstatic const llvm::MCExtraProcessorInfo " << ProcModel.ModelName << "ExtraInfo = {\n "; + // Add information related to the retire control unit. + EmitRetireControlUnitInfo(ProcModel, OS); + // Add information related to the register files (i.e. where to find register // file descriptors and register costs). EmitRegisterFileInfo(ProcModel, ProcModel.RegisterFiles.size(),