llvm::DbgVariableLocation Struct Reference

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

#include "llvm/CodeGen/DebugHandlerBase.h"

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

Public Attributes
unsigned	Register
	Base register.
SmallVector< int64_t, 1 >	LoadChain
	Chain of offsetted loads necessary to load the value if it lives in memory.
std::optional< llvm::DIExpression::FragmentInfo >	FragmentInfo
	Present if the location is part of a larger variable.

Detailed Description

Represents the location at which a variable is stored.

Definition at line 31 of file DebugHandlerBase.h.

Member Function Documentation

extractFromMachineInstruction()

std::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 34 of file DebugHandlerBase.cpp.

References llvm::dwarf::DW_OP_LLVM_arg, llvm::dwarf::DW_OP_LLVM_fragment, llvm::DIExpression::expr_op_begin(), llvm::DIExpression::expr_op_end(), and llvm::Offset.

Member Data Documentation

FragmentInfo

std::optional<llvm::DIExpression::FragmentInfo> llvm::DbgVariableLocation::FragmentInfo

Present if the location is part of a larger variable.

Definition at line 40 of file DebugHandlerBase.h.

LoadChain

SmallVector<int64_t, 1> llvm::DbgVariableLocation::LoadChain

Chain of offsetted loads necessary to load the value if it lives in memory.

Every load except for the last is pointer-sized.

Definition at line 37 of file DebugHandlerBase.h.

Referenced by canUseReferenceType(), and needsReferenceType().

Register

unsigned llvm::DbgVariableLocation::Register

Base register.

Definition at line 33 of file DebugHandlerBase.h.

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The documentation for this struct was generated from the following files:

• include/llvm/CodeGen/DebugHandlerBase.h
• lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp