66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
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//===-- WebAssemblyDebugValueManager.cpp - WebAssembly DebugValue Manager -===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file implements the manager for MachineInstr DebugValues.
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///
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//===----------------------------------------------------------------------===//
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#include "WebAssemblyDebugValueManager.h"
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#include "WebAssembly.h"
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#include "WebAssemblyMachineFunctionInfo.h"
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#include "llvm/CodeGen/MachineInstr.h"
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using namespace llvm;
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WebAssemblyDebugValueManager::WebAssemblyDebugValueManager(
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MachineInstr *Instr) {
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// This code differs from MachineInstr::collectDebugValues in that it scans
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// the whole BB, not just contiguous DBG_VALUEs.
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if (!Instr->getOperand(0).isReg())
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return;
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MachineBasicBlock::iterator DI = *Instr;
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++DI;
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for (MachineBasicBlock::iterator DE = Instr->getParent()->end(); DI != DE;
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++DI) {
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if (DI->isDebugValue() &&
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DI->getDebugOperandForReg(Instr->getOperand(0).getReg()))
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DbgValues.push_back(&*DI);
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}
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}
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void WebAssemblyDebugValueManager::move(MachineInstr *Insert) {
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MachineBasicBlock *MBB = Insert->getParent();
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for (MachineInstr *DBI : reverse(DbgValues))
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MBB->splice(Insert, DBI->getParent(), DBI);
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}
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void WebAssemblyDebugValueManager::updateReg(unsigned Reg) {
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for (auto *DBI : DbgValues)
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DBI->getDebugOperand(0).setReg(Reg);
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}
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void WebAssemblyDebugValueManager::clone(MachineInstr *Insert,
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unsigned NewReg) {
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MachineBasicBlock *MBB = Insert->getParent();
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MachineFunction *MF = MBB->getParent();
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for (MachineInstr *DBI : reverse(DbgValues)) {
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MachineInstr *Clone = MF->CloneMachineInstr(DBI);
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Clone->getDebugOperand(0).setReg(NewReg);
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MBB->insert(Insert, Clone);
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}
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}
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void WebAssemblyDebugValueManager::replaceWithLocal(unsigned LocalId) {
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for (auto *DBI : DbgValues) {
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MachineOperand &Op = DBI->getDebugOperand(0);
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Op.ChangeToTargetIndex(llvm::WebAssembly::TI_LOCAL, LocalId);
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}
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}
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