class VirtRegMap

Declaration

class VirtRegMap : public MachineFunctionPass { /* full declaration omitted */ };

Description

MachineFunctionPass - This class adapts the FunctionPass interface to allow convenient creation of passes that operate on the MachineFunction representation. Instead of overriding runOnFunction, subclasses override runOnMachineFunction.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:33

Inherits from: MachineFunctionPass

Member Variables

private llvm::MachineRegisterInfo* MRI = nullptr

private const llvm::TargetInstrInfo* TII = nullptr

private const llvm::TargetRegisterInfo* TRI = nullptr

private llvm::MachineFunction* MF = nullptr

private IndexedMap<llvm::Register, llvm::VirtReg2IndexFunctor> Virt2PhysMap

Virt2PhysMap - This is a virtual to physical register mapping. Each virtual register is required to have an entry in it; even spilled virtual registers (the register mapped to a spilled register is the temporary used to load it from the stack).

private IndexedMap<int, llvm::VirtReg2IndexFunctor> Virt2StackSlotMap

Virt2StackSlotMap - This is virtual register to stack slot mapping. Each spilled virtual register has an entry in it which corresponds to the stack slot this register is spilled at.

private IndexedMap<unsigned int, llvm::VirtReg2IndexFunctor> Virt2SplitMap

Virt2SplitMap - This is virtual register to splitted virtual register mapping.

private DenseMap<unsigned int, llvm::ShapeT> Virt2ShapeMap

Virt2ShapeMap - For X86 AMX register whose register is bound shape information.

public static char ID

Method Overview

• public VirtRegMap()
• public VirtRegMap(const llvm::VirtRegMap &)
• public void assignVirt2Phys(llvm::Register virtReg, llvm::MCPhysReg physReg)
• public void assignVirt2Shape(llvm::Register virtReg, llvm::ShapeT shape)
• public void assignVirt2StackSlot(llvm::Register virtReg, int SS)
• public int assignVirt2StackSlot(llvm::Register virtReg)
• public void clearAllVirt()
• public void clearVirt(llvm::Register virtReg)
• private unsigned int createSpillSlot(const llvm::TargetRegisterClass * RC)
• public void dump() const
• public void getAnalysisUsage(llvm::AnalysisUsage & AU) const
• public llvm::MachineFunction & getMachineFunction() const
• public llvm::Register getOriginal(llvm::Register VirtReg) const
• public llvm::MCRegister getPhys(llvm::Register virtReg) const
• public llvm::Register getPreSplitReg(llvm::Register virtReg) const
• public llvm::MachineRegisterInfo & getRegInfo() const
• public llvm::ShapeT getShape(llvm::Register virtReg) const
• public int getStackSlot(llvm::Register virtReg) const
• public const llvm::TargetRegisterInfo & getTargetRegInfo() const
• public void grow()
• public bool hasKnownPreference(llvm::Register VirtReg) const
• public bool hasPhys(llvm::Register virtReg) const
• public bool hasPreferredPhys(llvm::Register VirtReg) const
• public bool hasShape(llvm::Register virtReg) const
• public bool isAssignedReg(llvm::Register virtReg) const
• public bool isShapeMapEmpty() const
• public void print(llvm::raw_ostream & OS, const llvm::Module * M = nullptr) const
• public bool runOnMachineFunction(llvm::MachineFunction & MF)
• public void setIsSplitFromReg(llvm::Register virtReg, llvm::Register SReg)

Inherited from MachineFunctionPass:

• public doInitialization
• protected getAnalysisUsage
• protected getClearedProperties
• protected getRequiredProperties
• protected getSetProperties
• protected runOnMachineFunction

Inherited from FunctionPass:

• public assignPassManager
• public createPrinterPass
• public getPotentialPassManagerType
• public runOnFunction
• protected skipFunction

Inherited from Pass:

• public assignPassManager
• public createPass
• public createPrinterPass
• public doFinalization
• public doInitialization
• public dump
• public dumpPassStructure
• public getAdjustedAnalysisPointer
• public getAnalysis
• public getAnalysis
• public getAnalysisID
• public getAnalysisID
• public getAnalysisIfAvailable
• public getAnalysisUsage
• public getAsImmutablePass
• public getAsPMDataManager
• public getPassID
• public getPassKind
• public getPassName
• public getPotentialPassManagerType
• public getResolver
• public lookupPassInfo
• public lookupPassInfo
• public mustPreserveAnalysisID
• public preparePassManager
• public print
• public releaseMemory
• public setResolver
• public verifyAnalysis

Methods

¶VirtRegMap()

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:74

¶VirtRegMap(const llvm::VirtRegMap&)

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:77

Parameters

const llvm::VirtRegMap&

¶void assignVirt2Phys(llvm::Register virtReg,
                     llvm::MCPhysReg physReg)

Description

creates a mapping for the specified virtual register to the specified physical register

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:112

Parameters

llvm::Register virtReg

llvm::MCPhysReg physReg

¶void assignVirt2Shape(llvm::Register virtReg,
                      llvm::ShapeT shape)

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:125

Parameters

llvm::Register virtReg

llvm::ShapeT shape

¶void assignVirt2StackSlot(llvm::Register virtReg,
                          int SS)

Description

create a mapping for the specified virtual register to the specified stack slot

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:198

Parameters

llvm::Register virtReg

int SS

¶int assignVirt2StackSlot(llvm::Register virtReg)

Description

create a mapping for the specifed virtual register to the next available stack slot

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:194

Parameters

llvm::Register virtReg

¶void clearAllVirt()

Description

clears all virtual to physical register mappings

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:139

¶void clearVirt(llvm::Register virtReg)

Description

clears the specified virtual register's, physical register mapping

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:131

Parameters

llvm::Register virtReg

¶unsigned int createSpillSlot(
    const llvm::TargetRegisterClass* RC)

Description

createSpillSlot - Allocate a spill slot for RC from MFI.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:69

Parameters

const llvm::TargetRegisterClass* RC

¶void dump() const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:201

¶void getAnalysisUsage(
    llvm::AnalysisUsage& AU) const

Description

getAnalysisUsage - Subclasses that override getAnalysisUsage must call this. For MachineFunctionPasses, calling AU.preservesCFG() indicates that the pass does not modify the MachineBasicBlock CFG.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:82

Parameters

llvm::AnalysisUsage& AU

¶llvm::MachineFunction& getMachineFunction() const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:87

¶llvm::Register getOriginal(
    llvm::Register VirtReg) const

Description

getOriginal - Return the original virtual register that VirtReg descends from through splitting. A register that was not created by splitting is its own original. This operation is idempotent.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:169

Parameters

llvm::Register VirtReg

¶llvm::MCRegister getPhys(
    llvm::Register virtReg) const

Description

returns the physical register mapped to the specified virtual register

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:105

Parameters

llvm::Register virtReg

¶llvm::Register getPreSplitReg(
    llvm::Register virtReg) const

Description

returns the live interval virtReg is split from.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:161

Parameters

llvm::Register virtReg

¶llvm::MachineRegisterInfo& getRegInfo() const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:92

¶llvm::ShapeT getShape(
    llvm::Register virtReg) const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:120

Parameters

llvm::Register virtReg

¶int getStackSlot(llvm::Register virtReg) const

Description

returns the stack slot mapped to the specified virtual register

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:187

Parameters

llvm::Register virtReg

¶const llvm::TargetRegisterInfo& getTargetRegInfo()
    const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:93

¶void grow()

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:95

¶bool hasKnownPreference(
    llvm::Register VirtReg) const

Description

returns true if VirtReg has a known preferred register. This returns false if VirtReg has a preference that is a virtual register that hasn't been assigned yet.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:150

Parameters

llvm::Register VirtReg

¶bool hasPhys(llvm::Register virtReg) const

Description

returns true if the specified virtual register is mapped to a physical register

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:99

Parameters

llvm::Register virtReg

¶bool hasPreferredPhys(
    llvm::Register VirtReg) const

Description

returns true if VirtReg is assigned to its preferred physreg.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:145

Parameters

llvm::Register VirtReg

¶bool hasShape(llvm::Register virtReg) const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:116

Parameters

llvm::Register virtReg

¶bool isAssignedReg(llvm::Register virtReg) const

Description

returns true if the specified virtual register is not mapped to a stack slot or rematerialized.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:176

Parameters

llvm::Register virtReg

¶bool isShapeMapEmpty() const

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:114

¶void print(llvm::raw_ostream& OS,
           const llvm::Module* M = nullptr) const

Description

print - Print out the internal state of the pass. This is called by Analyze to print out the contents of an analysis. Otherwise it is not necessary to implement this method. Beware that the module pointer MAY be null. This automatically forwards to a virtual function that does not provide the Module* in case the analysis doesn't need it it can just be ignored.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:200

Parameters

llvm::raw_ostream& OS

const llvm::Module* M = nullptr

¶bool runOnMachineFunction(
    llvm::MachineFunction& MF)

Description

runOnMachineFunction - This method must be overloaded to perform the desired machine code transformation or analysis.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:80

Parameters

llvm::MachineFunction& MF

¶void setIsSplitFromReg(llvm::Register virtReg,
                       llvm::Register SReg)

Description

records virtReg is a split live interval from SReg.

Declared at: llvm/include/llvm/CodeGen/VirtRegMap.h:153

Parameters

llvm::Register virtReg

llvm::Register SReg