class VLocTracker

Declaration

class VLocTracker { /* full declaration omitted */ };

Description

Collection of DBG_VALUEs observed when traversing a block. Records each variable and the value the DBG_VALUE refers to. Requires the machine value location dataflow algorithm to have run already, so that values can be identified.

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:689

Member Variables

public MapVector<llvm::DebugVariable, LiveDebugValues::DbgValue> Vars

Map DebugVariable to the latest Value it's defined to have. Needs to be a MapVector because we determine order-in-the-input-MIR from the order in this container. We only retain the last DbgValue in each block for each variable, to determine the blocks live-out variable value. The Vars container forms the transfer function for this block, as part of the dataflow analysis. The movement of values between locations inside of a block is handled at a much later stage, in the TransferTracker class.

public SmallDenseMap<llvm::DebugVariable, const llvm::DILocation*, 8> Scopes

public llvm::MachineBasicBlock* MBB = nullptr

public const LiveDebugValues::OverlapMap& OverlappingFragments

public LiveDebugValues::DbgValueProperties EmptyProperties

Method Overview

• public VLocTracker(const LiveDebugValues::OverlapMap & O, const llvm::DIExpression * EmptyExpr)
• public void clear()
• public void considerOverlaps(const llvm::DebugVariable & Var, const llvm::DILocation * Loc)
• public void defVar(const llvm::MachineInstr & MI, const LiveDebugValues::DbgValueProperties & Properties, Optional<LiveDebugValues::ValueIDNum> ID)
• public void defVar(const llvm::MachineInstr & MI, const llvm::MachineOperand & MO)

Methods

¶VLocTracker(const LiveDebugValues::OverlapMap& O,
            const llvm::DIExpression* EmptyExpr)

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:706

Parameters

const LiveDebugValues::OverlapMap& O

const llvm::DIExpression* EmptyExpr

¶void clear()

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:770

¶void considerOverlaps(
    const llvm::DebugVariable& Var,
    const llvm::DILocation* Loc)

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:743

Parameters

const llvm::DebugVariable& Var

const llvm::DILocation* Loc

¶void defVar(
    const llvm::MachineInstr& MI,
    const LiveDebugValues::DbgValueProperties&
        Properties,
    Optional<LiveDebugValues::ValueIDNum> ID)

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:709

Parameters

const llvm::MachineInstr& MI

const LiveDebugValues::DbgValueProperties& Properties

Optional<LiveDebugValues::ValueIDNum> ID

¶void defVar(const llvm::MachineInstr& MI,
            const llvm::MachineOperand& MO)

Declared at: llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h:726

Parameters

const llvm::MachineInstr& MI

const llvm::MachineOperand& MO