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llvm-mirror/lib/CodeGen/PseudoSourceValue.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

153 lines
4.7 KiB
C++

//===-- llvm/CodeGen/PseudoSourceValue.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
//
//===----------------------------------------------------------------------===//
//
// This file implements the PseudoSourceValue class.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/TargetInstrInfo.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/LLVMContext.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
static const char *const PSVNames[] = {
"Stack", "GOT", "JumpTable", "ConstantPool", "FixedStack",
"GlobalValueCallEntry", "ExternalSymbolCallEntry"};
PseudoSourceValue::PseudoSourceValue(unsigned Kind, const TargetInstrInfo &TII)
: Kind(Kind) {
AddressSpace = TII.getAddressSpaceForPseudoSourceKind(Kind);
}
PseudoSourceValue::~PseudoSourceValue() {}
void PseudoSourceValue::printCustom(raw_ostream &O) const {
if (Kind < TargetCustom)
O << PSVNames[Kind];
else
O << "TargetCustom" << Kind;
}
bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
if (isStack())
return false;
if (isGOT() || isConstantPool() || isJumpTable())
return true;
llvm_unreachable("Unknown PseudoSourceValue!");
}
bool PseudoSourceValue::isAliased(const MachineFrameInfo *) const {
if (isStack() || isGOT() || isConstantPool() || isJumpTable())
return false;
llvm_unreachable("Unknown PseudoSourceValue!");
}
bool PseudoSourceValue::mayAlias(const MachineFrameInfo *) const {
return !(isGOT() || isConstantPool() || isJumpTable());
}
bool FixedStackPseudoSourceValue::isConstant(
const MachineFrameInfo *MFI) const {
return MFI && MFI->isImmutableObjectIndex(FI);
}
bool FixedStackPseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
if (!MFI)
return true;
return MFI->isAliasedObjectIndex(FI);
}
bool FixedStackPseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
if (!MFI)
return true;
// Spill slots will not alias any LLVM IR value.
return !MFI->isSpillSlotObjectIndex(FI);
}
void FixedStackPseudoSourceValue::printCustom(raw_ostream &OS) const {
OS << "FixedStack" << FI;
}
CallEntryPseudoSourceValue::CallEntryPseudoSourceValue(
unsigned Kind, const TargetInstrInfo &TII)
: PseudoSourceValue(Kind, TII) {}
bool CallEntryPseudoSourceValue::isConstant(const MachineFrameInfo *) const {
return false;
}
bool CallEntryPseudoSourceValue::isAliased(const MachineFrameInfo *) const {
return false;
}
bool CallEntryPseudoSourceValue::mayAlias(const MachineFrameInfo *) const {
return false;
}
GlobalValuePseudoSourceValue::GlobalValuePseudoSourceValue(
const GlobalValue *GV,
const TargetInstrInfo &TII)
: CallEntryPseudoSourceValue(GlobalValueCallEntry, TII), GV(GV) {}
ExternalSymbolPseudoSourceValue::ExternalSymbolPseudoSourceValue(
const char *ES, const TargetInstrInfo &TII)
: CallEntryPseudoSourceValue(ExternalSymbolCallEntry, TII), ES(ES) {}
PseudoSourceValueManager::PseudoSourceValueManager(
const TargetInstrInfo &TIInfo)
: TII(TIInfo),
StackPSV(PseudoSourceValue::Stack, TII),
GOTPSV(PseudoSourceValue::GOT, TII),
JumpTablePSV(PseudoSourceValue::JumpTable, TII),
ConstantPoolPSV(PseudoSourceValue::ConstantPool, TII) {}
const PseudoSourceValue *PseudoSourceValueManager::getStack() {
return &StackPSV;
}
const PseudoSourceValue *PseudoSourceValueManager::getGOT() { return &GOTPSV; }
const PseudoSourceValue *PseudoSourceValueManager::getConstantPool() {
return &ConstantPoolPSV;
}
const PseudoSourceValue *PseudoSourceValueManager::getJumpTable() {
return &JumpTablePSV;
}
const PseudoSourceValue *
PseudoSourceValueManager::getFixedStack(int FI) {
std::unique_ptr<FixedStackPseudoSourceValue> &V = FSValues[FI];
if (!V)
V = llvm::make_unique<FixedStackPseudoSourceValue>(FI, TII);
return V.get();
}
const PseudoSourceValue *
PseudoSourceValueManager::getGlobalValueCallEntry(const GlobalValue *GV) {
std::unique_ptr<const GlobalValuePseudoSourceValue> &E =
GlobalCallEntries[GV];
if (!E)
E = llvm::make_unique<GlobalValuePseudoSourceValue>(GV, TII);
return E.get();
}
const PseudoSourceValue *
PseudoSourceValueManager::getExternalSymbolCallEntry(const char *ES) {
std::unique_ptr<const ExternalSymbolPseudoSourceValue> &E =
ExternalCallEntries[ES];
if (!E)
E = llvm::make_unique<ExternalSymbolPseudoSourceValue>(ES, TII);
return E.get();
}