llvm/llvm/lib/Target/NVPTX/NVPTXAliasAnalysis.cpp

//===--------------------- NVPTXAliasAnalysis.cpp--------------------------===//
//
// 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 is the NVPTX address space based alias analysis pass.
//===----------------------------------------------------------------------===//

#include "NVPTXAliasAnalysis.h"
#include "MCTargetDesc/NVPTXBaseInfo.h"
#include "NVPTX.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/IR/CallingConv.h"
#include "llvm/IR/Instructions.h"
#include "llvm/Support/CommandLine.h"

usingnamespacellvm;

#define DEBUG_TYPE …

static cl::opt<unsigned> TraverseAddressSpacesLimit(
    "nvptx-traverse-address-aliasing-limit", cl::Hidden,
    cl::desc("Depth limit for finding address space through traversal"),
    cl::init(6));

AnalysisKey NVPTXAA::Key;

char NVPTXAAWrapperPass::ID = …;
char NVPTXExternalAAWrapper::ID = …;

INITIALIZE_PASS(…)

INITIALIZE_PASS(…)

ImmutablePass *llvm::createNVPTXAAWrapperPass() { … }

ImmutablePass *llvm::createNVPTXExternalAAWrapperPass() { … }

NVPTXAAWrapperPass::NVPTXAAWrapperPass() : … { … }

void NVPTXAAWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { … }

static unsigned getAddressSpace(const Value *V, unsigned MaxLookup) { … }

static AliasResult::Kind getAliasResult(unsigned AS1, unsigned AS2) { … }

AliasResult NVPTXAAResult::alias(const MemoryLocation &Loc1,
                                 const MemoryLocation &Loc2, AAQueryInfo &AAQI,
                                 const Instruction *) { … }

// TODO: .param address space may be writable in presence of cvta.param, but
// this instruction is currently not supported. NVPTXLowerArgs also does not
// allow any writes to .param pointers.
static bool isConstOrParam(unsigned AS) { … }

ModRefInfo NVPTXAAResult::getModRefInfoMask(const MemoryLocation &Loc,
                                            AAQueryInfo &AAQI,
                                            bool IgnoreLocals) { … }