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//===-- 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/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/PseudoSourceValueManager.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
using namespace llvm;
static const char *const PSVNames[] = {
"Stack", "GOT", "JumpTable", "ConstantPool", "FixedStack",
"GlobalValueCallEntry", "ExternalSymbolCallEntry"};
PseudoSourceValue::PseudoSourceValue(unsigned Kind, const TargetMachine &TM)
: Kind(Kind) {
AddressSpace = TM.getAddressSpaceForPseudoSourceKind(Kind);
}
PseudoSourceValue::~PseudoSourceValue() = default;
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 TargetMachine &TM)
: PseudoSourceValue(Kind, TM) {}
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 TargetMachine &TM)
: CallEntryPseudoSourceValue(GlobalValueCallEntry, TM), GV(GV) {}
ExternalSymbolPseudoSourceValue::ExternalSymbolPseudoSourceValue(
const char *ES, const TargetMachine &TM)
: CallEntryPseudoSourceValue(ExternalSymbolCallEntry, TM), ES(ES) {}
PseudoSourceValueManager::PseudoSourceValueManager(const TargetMachine &TMInfo)
: TM(TMInfo), StackPSV(PseudoSourceValue::Stack, TM),
GOTPSV(PseudoSourceValue::GOT, TM),
JumpTablePSV(PseudoSourceValue::JumpTable, TM),
ConstantPoolPSV(PseudoSourceValue::ConstantPool, TM) {}
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 = std::make_unique<FixedStackPseudoSourceValue>(FI, TM);
return V.get();
}
const PseudoSourceValue *
PseudoSourceValueManager::getGlobalValueCallEntry(const GlobalValue *GV) {
std::unique_ptr<const GlobalValuePseudoSourceValue> &E =
GlobalCallEntries[GV];
if (!E)
E = std::make_unique<GlobalValuePseudoSourceValue>(GV, TM);
return E.get();
}
const PseudoSourceValue *
PseudoSourceValueManager::getExternalSymbolCallEntry(const char *ES) {
std::unique_ptr<const ExternalSymbolPseudoSourceValue> &E =
ExternalCallEntries[ES];
if (!E)
E = std::make_unique<ExternalSymbolPseudoSourceValue>(ES, TM);
return E.get();
}
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