llvm/llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp

//===-- llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp -------*- 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
//
//===----------------------------------------------------------------------===//
//
// Common functionality for different debug information format backends.
// LLVM currently supports DWARF and CodeView.
//
//===----------------------------------------------------------------------===//

#include "llvm/CodeGen/DebugHandlerBase.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/CommandLine.h"

usingnamespacellvm;

#define DEBUG_TYPE …

/// If true, we drop variable location ranges which exist entirely outside the
/// variable's lexical scope instruction ranges.
static cl::opt<bool> TrimVarLocs("trim-var-locs", cl::Hidden, cl::init(true));

std::optional<DbgVariableLocation>
DbgVariableLocation::extractFromMachineInstruction(
    const MachineInstr &Instruction) { … }

DebugHandlerBase::DebugHandlerBase(AsmPrinter *A) : … { … }

DebugHandlerBase::~DebugHandlerBase() = default;

void DebugHandlerBase::beginModule(Module *M) { … }

// Each LexicalScope has first instruction and last instruction to mark
// beginning and end of a scope respectively. Create an inverse map that list
// scopes starts (and ends) with an instruction. One instruction may start (or
// end) multiple scopes. Ignore scopes that are not reachable.
void DebugHandlerBase::identifyScopeMarkers() { … }

// Return Label preceding the instruction.
MCSymbol *DebugHandlerBase::getLabelBeforeInsn(const MachineInstr *MI) { … }

// Return Label immediately following the instruction.
MCSymbol *DebugHandlerBase::getLabelAfterInsn(const MachineInstr *MI) { … }

/// If this type is derived from a base type then return base type size.
uint64_t DebugHandlerBase::getBaseTypeSize(const DIType *Ty) { … }

bool DebugHandlerBase::isUnsignedDIType(const DIType *Ty) { … }

static bool hasDebugInfo(const MachineFunction *MF) { … }

void DebugHandlerBase::beginFunction(const MachineFunction *MF) { … }

void DebugHandlerBase::beginInstruction(const MachineInstr *MI) { … }

void DebugHandlerBase::endInstruction() { … }

void DebugHandlerBase::endFunction(const MachineFunction *MF) { … }

void DebugHandlerBase::beginBasicBlockSection(const MachineBasicBlock &MBB) { … }

void DebugHandlerBase::endBasicBlockSection(const MachineBasicBlock &MBB) { … }