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AccelTable.h
(13.54 KB)
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Analysis.h
(6.04 KB)
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AntiDepBreaker.h
(3.78 KB)
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AsmPrinter.h
(27.35 KB)
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AsmPrinterHandler.h
(2.6 KB)
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AtomicExpandUtils.h
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BasicTTIImpl.h
(73.64 KB)
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BuiltinGCs.h
(1008 B)
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CSEConfigBase.h
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CalcSpillWeights.h
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CallingConvLower.h
(21 KB)
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CommandFlags.h
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CostTable.h
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DAGCombine.h
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DFAPacketizer.h
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DIE.h
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DIEValue.def
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DbgEntityHistoryCalculator.h
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DebugHandlerBase.h
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DwarfStringPoolEntry.h
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EdgeBundles.h
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ExecutionDomainFix.h
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ExpandReductions.h
(726 B)
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FastISel.h
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FaultMaps.h
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FunctionLoweringInfo.h
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GCMetadata.h
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GCMetadataPrinter.h
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GCStrategy.h
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GlobalISel
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ISDOpcodes.h
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IndirectThunks.h
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IntrinsicLowering.h
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LatencyPriorityQueue.h
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LazyMachineBlockFrequencyInfo.h
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LexicalScopes.h
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LinkAllAsmWriterComponents.h
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LinkAllCodegenComponents.h
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LiveInterval.h
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LiveIntervalCalc.h
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LiveIntervalUnion.h
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LiveIntervals.h
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LivePhysRegs.h
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LiveRangeCalc.h
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LiveRangeEdit.h
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LiveRegMatrix.h
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LiveRegUnits.h
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LiveStacks.h
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LiveVariables.h
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LoopTraversal.h
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LowLevelType.h
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MBFIWrapper.h
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MIRFormatter.h
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MIRParser
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MIRPrinter.h
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MIRYamlMapping.h
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MachORelocation.h
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MachineBasicBlock.h
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MachineBlockFrequencyInfo.h
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MachineBranchProbabilityInfo.h
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MachineCombinerPattern.h
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MachineConstantPool.h
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MachineDominanceFrontier.h
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MachineDominators.h
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MachineFrameInfo.h
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MachineFunction.h
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MachineFunctionPass.h
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MachineInstr.h
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MachineInstrBuilder.h
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MachineInstrBundle.h
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MachineInstrBundleIterator.h
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MachineJumpTableInfo.h
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MachineLoopInfo.h
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MachineLoopUtils.h
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MachineMemOperand.h
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MachineModuleInfo.h
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MachineModuleInfoImpls.h
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MachineOperand.h
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MachineOptimizationRemarkEmitter.h
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MachineOutliner.h
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MachinePassRegistry.h
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MachinePipeliner.h
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MachinePostDominators.h
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MachineRegionInfo.h
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MachineRegisterInfo.h
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MachineSSAUpdater.h
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MachineScheduler.h
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MachineSizeOpts.h
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MachineTraceMetrics.h
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MacroFusion.h
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ModuloSchedule.h
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NonRelocatableStringpool.h
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PBQP
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PBQPRAConstraint.h
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ParallelCG.h
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Passes.h
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PreISelIntrinsicLowering.h
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PseudoSourceValue.h
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RDFGraph.h
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RDFLiveness.h
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RDFRegisters.h
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ReachingDefAnalysis.h
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RegAllocPBQP.h
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RegAllocRegistry.h
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Register.h
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RegisterClassInfo.h
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RegisterPressure.h
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RegisterScavenging.h
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RegisterUsageInfo.h
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ResourcePriorityQueue.h
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RuntimeLibcalls.h
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SDNodeProperties.td
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ScheduleDAG.h
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ScheduleDAGInstrs.h
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ScheduleDAGMutation.h
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ScheduleDFS.h
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ScheduleHazardRecognizer.h
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SchedulerRegistry.h
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ScoreboardHazardRecognizer.h
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SelectionDAG.h
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SelectionDAGAddressAnalysis.h
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SelectionDAGISel.h
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SelectionDAGNodes.h
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SelectionDAGTargetInfo.h
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SlotIndexes.h
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Spiller.h
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StackMaps.h
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StackProtector.h
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SwiftErrorValueTracking.h
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SwitchLoweringUtils.h
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TailDuplicator.h
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TargetCallingConv.h
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TargetFrameLowering.h
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TargetInstrInfo.h
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TargetLowering.h
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TargetLoweringObjectFileImpl.h
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TargetOpcodes.h
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TargetPassConfig.h
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TargetRegisterInfo.h
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TargetSchedule.h
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TargetSubtargetInfo.h
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UnreachableBlockElim.h
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ValueTypes.h
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ValueTypes.td
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VirtRegMap.h
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WasmEHFuncInfo.h
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WinEHFuncInfo.h
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Editing: TargetPassConfig.h
//===- TargetPassConfig.h - Code Generation pass options --------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // /// Target-Independent Code Generator Pass Configuration Options pass. // //===----------------------------------------------------------------------===// #ifndef LLVM_CODEGEN_TARGETPASSCONFIG_H #define LLVM_CODEGEN_TARGETPASSCONFIG_H #include "llvm/Pass.h" #include "llvm/Support/CodeGen.h" #include <cassert> #include <string> namespace llvm { class LLVMTargetMachine; struct MachineSchedContext; class PassConfigImpl; class ScheduleDAGInstrs; class CSEConfigBase; // The old pass manager infrastructure is hidden in a legacy namespace now. namespace legacy { class PassManagerBase; } // end namespace legacy using legacy::PassManagerBase; /// Discriminated union of Pass ID types. /// /// The PassConfig API prefers dealing with IDs because they are safer and more /// efficient. IDs decouple configuration from instantiation. This way, when a /// pass is overriden, it isn't unnecessarily instantiated. It is also unsafe to /// refer to a Pass pointer after adding it to a pass manager, which deletes /// redundant pass instances. /// /// However, it is convient to directly instantiate target passes with /// non-default ctors. These often don't have a registered PassInfo. Rather than /// force all target passes to implement the pass registry boilerplate, allow /// the PassConfig API to handle either type. /// /// AnalysisID is sadly char*, so PointerIntPair won't work. class IdentifyingPassPtr { union { AnalysisID ID; Pass *P; }; bool IsInstance = false; public: IdentifyingPassPtr() : P(nullptr) {} IdentifyingPassPtr(AnalysisID IDPtr) : ID(IDPtr) {} IdentifyingPassPtr(Pass *InstancePtr) : P(InstancePtr), IsInstance(true) {} bool isValid() const { return P; } bool isInstance() const { return IsInstance; } AnalysisID getID() const { assert(!IsInstance && "Not a Pass ID"); return ID; } Pass *getInstance() const { assert(IsInstance && "Not a Pass Instance"); return P; } }; /// Target-Independent Code Generator Pass Configuration Options. /// /// This is an ImmutablePass solely for the purpose of exposing CodeGen options /// to the internals of other CodeGen passes. class TargetPassConfig : public ImmutablePass { private: PassManagerBase *PM = nullptr; AnalysisID StartBefore = nullptr; AnalysisID StartAfter = nullptr; AnalysisID StopBefore = nullptr; AnalysisID StopAfter = nullptr; unsigned StartBeforeInstanceNum = 0; unsigned StartBeforeCount = 0; unsigned StartAfterInstanceNum = 0; unsigned StartAfterCount = 0; unsigned StopBeforeInstanceNum = 0; unsigned StopBeforeCount = 0; unsigned StopAfterInstanceNum = 0; unsigned StopAfterCount = 0; bool Started = true; bool Stopped = false; bool AddingMachinePasses = false; bool DebugifyIsSafe = true; /// Set the StartAfter, StartBefore and StopAfter passes to allow running only /// a portion of the normal code-gen pass sequence. /// /// If the StartAfter and StartBefore pass ID is zero, then compilation will /// begin at the normal point; otherwise, clear the Started flag to indicate /// that passes should not be added until the starting pass is seen. If the /// Stop pass ID is zero, then compilation will continue to the end. /// /// This function expects that at least one of the StartAfter or the /// StartBefore pass IDs is null. void setStartStopPasses(); protected: LLVMTargetMachine *TM; PassConfigImpl *Impl = nullptr; // Internal data structures bool Initialized = false; // Flagged after all passes are configured. // Target Pass Options // Targets provide a default setting, user flags override. bool DisableVerify = false; /// Default setting for -enable-tail-merge on this target. bool EnableTailMerge = true; /// Require processing of functions such that callees are generated before /// callers. bool RequireCodeGenSCCOrder = false; /// Add the actual instruction selection passes. This does not include /// preparation passes on IR. bool addCoreISelPasses(); public: TargetPassConfig(LLVMTargetMachine &TM, PassManagerBase &pm); // Dummy constructor. TargetPassConfig(); ~TargetPassConfig() override; static char ID; /// Get the right type of TargetMachine for this target. template<typename TMC> TMC &getTM() const { return *static_cast<TMC*>(TM); } // void setInitialized() { Initialized = true; } CodeGenOpt::Level getOptLevel() const; /// Returns true if one of the `-start-after`, `-start-before`, `-stop-after` /// or `-stop-before` options is set. static bool hasLimitedCodeGenPipeline(); /// Returns true if none of the `-stop-before` and `-stop-after` options is /// set. static bool willCompleteCodeGenPipeline(); /// If hasLimitedCodeGenPipeline is true, this method /// returns a string with the name of the options, separated /// by \p Separator that caused this pipeline to be limited. static std::string getLimitedCodeGenPipelineReason(const char *Separator = "/"); void setDisableVerify(bool Disable) { setOpt(DisableVerify, Disable); } bool getEnableTailMerge() const { return EnableTailMerge; } void setEnableTailMerge(bool Enable) { setOpt(EnableTailMerge, Enable); } bool requiresCodeGenSCCOrder() const { return RequireCodeGenSCCOrder; } void setRequiresCodeGenSCCOrder(bool Enable = true) { setOpt(RequireCodeGenSCCOrder, Enable); } /// Allow the target to override a specific pass without overriding the pass /// pipeline. When passes are added to the standard pipeline at the /// point where StandardID is expected, add TargetID in its place. void substitutePass(AnalysisID StandardID, IdentifyingPassPtr TargetID); /// Insert InsertedPassID pass after TargetPassID pass. void insertPass(AnalysisID TargetPassID, IdentifyingPassPtr InsertedPassID, bool VerifyAfter = true, bool PrintAfter = true); /// Allow the target to enable a specific standard pass by default. void enablePass(AnalysisID PassID) { substitutePass(PassID, PassID); } /// Allow the target to disable a specific standard pass by default. void disablePass(AnalysisID PassID) { substitutePass(PassID, IdentifyingPassPtr()); } /// Return the pass substituted for StandardID by the target. /// If no substitution exists, return StandardID. IdentifyingPassPtr getPassSubstitution(AnalysisID StandardID) const; /// Return true if the pass has been substituted by the target or /// overridden on the command line. bool isPassSubstitutedOrOverridden(AnalysisID ID) const; /// Return true if the optimized regalloc pipeline is enabled. bool getOptimizeRegAlloc() const; /// Return true if the default global register allocator is in use and /// has not be overriden on the command line with '-regalloc=...' bool usingDefaultRegAlloc() const; /// High level function that adds all passes necessary to go from llvm IR /// representation to the MI representation. /// Adds IR based lowering and target specific optimization passes and finally /// the core instruction selection passes. /// \returns true if an error occurred, false otherwise. bool addISelPasses(); /// Add common target configurable passes that perform LLVM IR to IR /// transforms following machine independent optimization. virtual void addIRPasses(); /// Add passes to lower exception handling for the code generator. void addPassesToHandleExceptions(); /// Add pass to prepare the LLVM IR for code generation. This should be done /// before exception handling preparation passes. virtual void addCodeGenPrepare(); /// Add common passes that perform LLVM IR to IR transforms in preparation for /// instruction selection. virtual void addISelPrepare(); /// addInstSelector - This method should install an instruction selector pass, /// which converts from LLVM code to machine instructions. virtual bool addInstSelector() { return true; } /// This method should install an IR translator pass, which converts from /// LLVM code to machine instructions with possibly generic opcodes. virtual bool addIRTranslator() { return true; } /// This method may be implemented by targets that want to run passes /// immediately before legalization. virtual void addPreLegalizeMachineIR() {} /// This method should install a legalize pass, which converts the instruction /// sequence into one that can be selected by the target. virtual bool addLegalizeMachineIR() { return true; } /// This method may be implemented by targets that want to run passes /// immediately before the register bank selection. virtual void addPreRegBankSelect() {} /// This method should install a register bank selector pass, which /// assigns register banks to virtual registers without a register /// class or register banks. virtual bool addRegBankSelect() { return true; } /// This method may be implemented by targets that want to run passes /// immediately before the (global) instruction selection. virtual void addPreGlobalInstructionSelect() {} /// This method should install a (global) instruction selector pass, which /// converts possibly generic instructions to fully target-specific /// instructions, thereby constraining all generic virtual registers to /// register classes. virtual bool addGlobalInstructionSelect() { return true; } /// Add the complete, standard set of LLVM CodeGen passes. /// Fully developed targets will not generally override this. virtual void addMachinePasses(); /// Create an instance of ScheduleDAGInstrs to be run within the standard /// MachineScheduler pass for this function and target at the current /// optimization level. /// /// This can also be used to plug a new MachineSchedStrategy into an instance /// of the standard ScheduleDAGMI: /// return new ScheduleDAGMI(C, std::make_unique<MyStrategy>(C), /*RemoveKillFlags=*/false) /// /// Return NULL to select the default (generic) machine scheduler. virtual ScheduleDAGInstrs * createMachineScheduler(MachineSchedContext *C) const { return nullptr; } /// Similar to createMachineScheduler but used when postRA machine scheduling /// is enabled. virtual ScheduleDAGInstrs * createPostMachineScheduler(MachineSchedContext *C) const { return nullptr; } /// printAndVerify - Add a pass to dump then verify the machine function, if /// those steps are enabled. void printAndVerify(const std::string &Banner); /// Add a pass to print the machine function if printing is enabled. void addPrintPass(const std::string &Banner); /// Add a pass to perform basic verification of the machine function if /// verification is enabled. void addVerifyPass(const std::string &Banner); /// Add a pass to add synthesized debug info to the MIR. void addDebugifyPass(); /// Add a pass to remove debug info from the MIR. void addStripDebugPass(); /// Add standard passes before a pass that's about to be added. For example, /// the DebugifyMachineModulePass if it is enabled. void addMachinePrePasses(bool AllowDebugify = true); /// Add standard passes after a pass that has just been added. For example, /// the MachineVerifier if it is enabled. void addMachinePostPasses(const std::string &Banner, bool AllowPrint = true, bool AllowVerify = true, bool AllowStrip = true); /// Check whether or not GlobalISel should abort on error. /// When this is disabled, GlobalISel will fall back on SDISel instead of /// erroring out. bool isGlobalISelAbortEnabled() const; /// Check whether or not a diagnostic should be emitted when GlobalISel /// uses the fallback path. In other words, it will emit a diagnostic /// when GlobalISel failed and isGlobalISelAbortEnabled is false. virtual bool reportDiagnosticWhenGlobalISelFallback() const; /// Check whether continuous CSE should be enabled in GISel passes. /// By default, it's enabled for non O0 levels. virtual bool isGISelCSEEnabled() const; /// Returns the CSEConfig object to use for the current optimization level. virtual std::unique_ptr<CSEConfigBase> getCSEConfig() const; protected: // Helper to verify the analysis is really immutable. void setOpt(bool &Opt, bool Val); /// Methods with trivial inline returns are convenient points in the common /// codegen pass pipeline where targets may insert passes. Methods with /// out-of-line standard implementations are major CodeGen stages called by /// addMachinePasses. Some targets may override major stages when inserting /// passes is insufficient, but maintaining overriden stages is more work. /// /// addPreISelPasses - This method should add any "last minute" LLVM->LLVM /// passes (which are run just before instruction selector). virtual bool addPreISel() { return true; } /// addMachineSSAOptimization - Add standard passes that optimize machine /// instructions in SSA form. virtual void addMachineSSAOptimization(); /// Add passes that optimize instruction level parallelism for out-of-order /// targets. These passes are run while the machine code is still in SSA /// form, so they can use MachineTraceMetrics to control their heuristics. /// /// All passes added here should preserve the MachineDominatorTree, /// MachineLoopInfo, and MachineTraceMetrics analyses. virtual bool addILPOpts() { return false; } /// This method may be implemented by targets that want to run passes /// immediately before register allocation. virtual void addPreRegAlloc() { } /// createTargetRegisterAllocator - Create the register allocator pass for /// this target at the current optimization level. virtual FunctionPass *createTargetRegisterAllocator(bool Optimized); /// addFastRegAlloc - Add the minimum set of target-independent passes that /// are required for fast register allocation. virtual void addFastRegAlloc(); /// addOptimizedRegAlloc - Add passes related to register allocation. /// LLVMTargetMachine provides standard regalloc passes for most targets. virtual void addOptimizedRegAlloc(); /// addPreRewrite - Add passes to the optimized register allocation pipeline /// after register allocation is complete, but before virtual registers are /// rewritten to physical registers. /// /// These passes must preserve VirtRegMap and LiveIntervals, and when running /// after RABasic or RAGreedy, they should take advantage of LiveRegMatrix. /// When these passes run, VirtRegMap contains legal physreg assignments for /// all virtual registers. /// /// Note if the target overloads addRegAssignAndRewriteOptimized, this may not /// be honored. This is also not generally used for the the fast variant, /// where the allocation and rewriting are done in one pass. virtual bool addPreRewrite() { return false; } /// Add passes to be run immediately after virtual registers are rewritten /// to physical registers. virtual void addPostRewrite() { } /// This method may be implemented by targets that want to run passes after /// register allocation pass pipeline but before prolog-epilog insertion. virtual void addPostRegAlloc() { } /// Add passes that optimize machine instructions after register allocation. virtual void addMachineLateOptimization(); /// This method may be implemented by targets that want to run passes after /// prolog-epilog insertion and before the second instruction scheduling pass. virtual void addPreSched2() { } /// addGCPasses - Add late codegen passes that analyze code for garbage /// collection. This should return true if GC info should be printed after /// these passes. virtual bool addGCPasses(); /// Add standard basic block placement passes. virtual void addBlockPlacement(); /// This pass may be implemented by targets that want to run passes /// immediately before machine code is emitted. virtual void addPreEmitPass() { } /// Targets may add passes immediately before machine code is emitted in this /// callback. This is called even later than `addPreEmitPass`. // FIXME: Rename `addPreEmitPass` to something more sensible given its actual // position and remove the `2` suffix here as this callback is what // `addPreEmitPass` *should* be but in reality isn't. virtual void addPreEmitPass2() {} /// Utilities for targets to add passes to the pass manager. /// /// Add a CodeGen pass at this point in the pipeline after checking overrides. /// Return the pass that was added, or zero if no pass was added. /// @p printAfter if true and adding a machine function pass add an extra /// machine printer pass afterwards /// @p verifyAfter if true and adding a machine function pass add an extra /// machine verification pass afterwards. AnalysisID addPass(AnalysisID PassID, bool verifyAfter = true, bool printAfter = true); /// Add a pass to the PassManager if that pass is supposed to be run, as /// determined by the StartAfter and StopAfter options. Takes ownership of the /// pass. /// @p printAfter if true and adding a machine function pass add an extra /// machine printer pass afterwards /// @p verifyAfter if true and adding a machine function pass add an extra /// machine verification pass afterwards. void addPass(Pass *P, bool verifyAfter = true, bool printAfter = true); /// addMachinePasses helper to create the target-selected or overriden /// regalloc pass. virtual FunctionPass *createRegAllocPass(bool Optimized); /// Add core register alloator passes which do the actual register assignment /// and rewriting. \returns true if any passes were added. virtual bool addRegAssignmentFast(); virtual bool addRegAssignmentOptimized(); }; } // end namespace llvm #endif // LLVM_CODEGEN_TARGETPASSCONFIG_H
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