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//===-- WebAssemblyDebugValueManager.cpp - WebAssembly DebugValue Manager -===//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file implements the manager for MachineInstr DebugValues.
///
//===----------------------------------------------------------------------===//
#include "WebAssemblyDebugValueManager.h"
#include "WebAssembly.h"
#include "WebAssemblyMachineFunctionInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
using namespace llvm;
WebAssemblyDebugValueManager::WebAssemblyDebugValueManager(
MachineInstr *Instr) {
// This code differs from MachineInstr::collectDebugValues in that it scans
// the whole BB, not just contiguous DBG_VALUEs.
if (!Instr->getOperand(0).isReg())
return;
MachineBasicBlock::iterator DI = *Instr;
++DI;
for (MachineBasicBlock::iterator DE = Instr->getParent()->end(); DI != DE;
++DI) {
if (DI->isDebugValue() &&
DI->getDebugOperandForReg(Instr->getOperand(0).getReg()))
DbgValues.push_back(&*DI);
}
}
void WebAssemblyDebugValueManager::move(MachineInstr *Insert) {
MachineBasicBlock *MBB = Insert->getParent();
for (MachineInstr *DBI : reverse(DbgValues))
MBB->splice(Insert, DBI->getParent(), DBI);
}
void WebAssemblyDebugValueManager::updateReg(unsigned Reg) {
for (auto *DBI : DbgValues)
DBI->getDebugOperand(0).setReg(Reg);
}
void WebAssemblyDebugValueManager::clone(MachineInstr *Insert,
unsigned NewReg) {
MachineBasicBlock *MBB = Insert->getParent();
MachineFunction *MF = MBB->getParent();
for (MachineInstr *DBI : reverse(DbgValues)) {
MachineInstr *Clone = MF->CloneMachineInstr(DBI);
Clone->getDebugOperand(0).setReg(NewReg);
MBB->insert(Insert, Clone);
}
}
void WebAssemblyDebugValueManager::replaceWithLocal(unsigned LocalId) {
for (auto *DBI : DbgValues) {
MachineOperand &Op0 = DBI->getDebugOperand(0);
MachineOperand &Op1 = DBI->getOperand(1);
bool Indirect = Op1.isImm() && Op1.getImm() == 0;
Op0.ChangeToTargetIndex(Indirect ? llvm::WebAssembly::TI_LOCAL_INDIRECT
: llvm::WebAssembly::TI_LOCAL,
LocalId);
}
}
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