Represents the location at which a variable is stored. More...

#include "llvm/CodeGen/DebugHandlerBase.h"

Collaboration diagram for llvm::DbgVariableLocation:

[legend]

Static Public Member Functions
static Optional< DbgVariableLocation >	extractFromMachineInstruction (const MachineInstr &Instruction)
	Extract a VariableLocation from a MachineInstr. More...

Public Attributes
unsigned	Register
	Base register. More...

SmallVector< int64_t, 1 >	LoadChain
	Chain of offsetted loads necessary to load the value if it lives in memory. More...

llvm::Optional< llvm::DIExpression::FragmentInfo >	FragmentInfo
	Present if the location is part of a larger variable. More...

Detailed Description

Represents the location at which a variable is stored.

Definition at line 32 of file DebugHandlerBase.h.

Member Function Documentation

◆ extractFromMachineInstruction()

Optional< DbgVariableLocation > DbgVariableLocation::extractFromMachineInstruction ( const MachineInstr & Instruction )

static

Extract a VariableLocation from a MachineInstr.

This will only work if Instruction is a debug value instruction and the associated DIExpression is in one of the supported forms. If these requirements are not met, the returned Optional will not have a value.

Definition at line 31 of file DebugHandlerBase.cpp.

References llvm::dwarf::DW_OP_LLVM_fragment, llvm::DIExpression::expr_op_begin(), llvm::DIExpression::expr_op_end(), FragmentInfo, llvm::MachineInstr::getDebugExpression(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineInstr::isDebugValue(), llvm::MachineInstr::isIndirectDebugValue(), llvm::MachineOperand::isReg(), LoadChain, llvm::None, llvm::SmallVectorTemplateBase< T, bool >::push_back(), Register, and llvm::Optional< T >::reset().