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d21f701c76
- Distinct metadata needs generating in the codegen to attach correct AAInfo on the loads/stores after lowering, merging, and other relevant transformations. - This patch adds 'MachhineModuleSlotTracker' to help assign slot numbers to these newly generated unnamed metadata nodes. - To help 'MachhineModuleSlotTracker' track machine metadata, the original 'SlotTracker' is rebased from 'AbstractSlotTrackerStorage', which provides basic interfaces to create/retrive metadata slots. In addition, once LLVM IR is processsed, additional hooks are also introduced to help collect machine metadata and assign them slot numbers. - Finally, if there is any such machine metadata, 'MIRPrinter' outputs an additional 'machineMetadataNodes' field containing all the definition of those nodes. Reviewed By: arsenm Differential Revision: https://reviews.llvm.org/D103205
82 lines
3.0 KiB
C++
82 lines
3.0 KiB
C++
//===-- llvm/CodeGen/MachineModuleInfo.cpp ----------------------*- C++ -*-===//
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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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#include "llvm/CodeGen/MachineModuleSlotTracker.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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using namespace llvm;
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void MachineModuleSlotTracker::processMachineFunctionMetadata(
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AbstractSlotTrackerStorage *AST, const MachineFunction &MF) {
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// Create metadata created within the backend.
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for (const MachineBasicBlock &MBB : MF)
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for (const MachineInstr &MI : MBB.instrs())
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for (const MachineMemOperand *MMO : MI.memoperands()) {
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AAMDNodes AAInfo = MMO->getAAInfo();
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if (AAInfo.TBAA)
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AST->createMetadataSlot(AAInfo.TBAA);
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if (AAInfo.TBAAStruct)
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AST->createMetadataSlot(AAInfo.TBAAStruct);
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if (AAInfo.Scope)
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AST->createMetadataSlot(AAInfo.Scope);
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if (AAInfo.NoAlias)
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AST->createMetadataSlot(AAInfo.NoAlias);
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}
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}
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void MachineModuleSlotTracker::processMachineModule(
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AbstractSlotTrackerStorage *AST, const Module *M,
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bool ShouldInitializeAllMetadata) {
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if (ShouldInitializeAllMetadata) {
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for (const Function &F : *M) {
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if (&F != &TheFunction)
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continue;
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MDNStartSlot = AST->getNextMetadataSlot();
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if (auto *MF = TheMMI.getMachineFunction(F))
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processMachineFunctionMetadata(AST, *MF);
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MDNEndSlot = AST->getNextMetadataSlot();
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break;
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}
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}
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}
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void MachineModuleSlotTracker::processMachineFunction(
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AbstractSlotTrackerStorage *AST, const Function *F,
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bool ShouldInitializeAllMetadata) {
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if (!ShouldInitializeAllMetadata && F == &TheFunction) {
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MDNStartSlot = AST->getNextMetadataSlot();
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if (auto *MF = TheMMI.getMachineFunction(*F))
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processMachineFunctionMetadata(AST, *MF);
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MDNEndSlot = AST->getNextMetadataSlot();
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}
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}
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void MachineModuleSlotTracker::collectMachineMDNodes(
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MachineMDNodeListType &L) const {
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collectMDNodes(L, MDNStartSlot, MDNEndSlot);
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}
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MachineModuleSlotTracker::MachineModuleSlotTracker(
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const MachineFunction *MF, bool ShouldInitializeAllMetadata)
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: ModuleSlotTracker(MF->getFunction().getParent(),
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ShouldInitializeAllMetadata),
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TheFunction(MF->getFunction()), TheMMI(MF->getMMI()), MDNStartSlot(0),
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MDNEndSlot(0) {
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setProcessHook([this](AbstractSlotTrackerStorage *AST, const Module *M,
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bool ShouldInitializeAllMetadata) {
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this->processMachineModule(AST, M, ShouldInitializeAllMetadata);
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});
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setProcessHook([this](AbstractSlotTrackerStorage *AST, const Function *F,
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bool ShouldInitializeAllMetadata) {
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this->processMachineFunction(AST, F, ShouldInitializeAllMetadata);
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});
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}
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MachineModuleSlotTracker::~MachineModuleSlotTracker() = default;
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