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https://github.com/Gericom/teak-llvm.git
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bceefe85c6
This commit updates the documentation comments in PseudoSourceValue.cpp and PseudoSourceValue.h based on the LLVM's documentation style. It also fixes several instances of variable names that started with a lowercase letter. This change is done in preparation for the changes to the pseudo source value object management and to the PseudoSourceValue's class hierarchy. llvm-svn: 244686
122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
//===-- llvm/CodeGen/PseudoSourceValue.cpp ----------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PseudoSourceValue class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/PseudoSourceValue.h"
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#include "llvm/CodeGen/MachineFrameInfo.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Mutex.h"
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#include "llvm/Support/raw_ostream.h"
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#include <map>
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using namespace llvm;
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namespace {
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struct PSVGlobalsTy {
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// PseudoSourceValues are immutable so don't need locking.
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const PseudoSourceValue PSVs[4];
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sys::Mutex Lock; // Guards FSValues, but not the values inside it.
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std::map<int, const PseudoSourceValue *> FSValues;
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PSVGlobalsTy() : PSVs() {}
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~PSVGlobalsTy() {
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for (std::map<int, const PseudoSourceValue *>::iterator
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I = FSValues.begin(),
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E = FSValues.end();
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I != E; ++I) {
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delete I->second;
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}
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}
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};
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static ManagedStatic<PSVGlobalsTy> PSVGlobals;
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} // anonymous namespace
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const PseudoSourceValue *PseudoSourceValue::getStack() {
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return &PSVGlobals->PSVs[0];
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}
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const PseudoSourceValue *PseudoSourceValue::getGOT() {
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return &PSVGlobals->PSVs[1];
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}
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const PseudoSourceValue *PseudoSourceValue::getJumpTable() {
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return &PSVGlobals->PSVs[2];
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}
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const PseudoSourceValue *PseudoSourceValue::getConstantPool() {
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return &PSVGlobals->PSVs[3];
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}
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static const char *const PSVNames[] = {"Stack", "GOT", "JumpTable",
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"ConstantPool"};
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PseudoSourceValue::PseudoSourceValue(bool IsFixed) : IsFixed(IsFixed) {}
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PseudoSourceValue::~PseudoSourceValue() {}
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void PseudoSourceValue::printCustom(raw_ostream &O) const {
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O << PSVNames[this - PSVGlobals->PSVs];
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}
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const PseudoSourceValue *PseudoSourceValue::getFixedStack(int FI) {
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PSVGlobalsTy &PG = *PSVGlobals;
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sys::ScopedLock locked(PG.Lock);
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const PseudoSourceValue *&V = PG.FSValues[FI];
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if (!V)
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V = new FixedStackPseudoSourceValue(FI);
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return V;
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}
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bool PseudoSourceValue::isConstant(const MachineFrameInfo *) const {
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if (this == getStack())
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return false;
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if (this == getGOT() || this == getConstantPool() || this == getJumpTable())
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return true;
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llvm_unreachable("Unknown PseudoSourceValue!");
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}
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bool PseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
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if (this == getStack() || this == getGOT() || this == getConstantPool() ||
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this == getJumpTable())
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return false;
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llvm_unreachable("Unknown PseudoSourceValue!");
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}
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bool PseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
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if (this == getGOT() || this == getConstantPool() || this == getJumpTable())
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return false;
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return true;
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}
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bool FixedStackPseudoSourceValue::isConstant(
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const MachineFrameInfo *MFI) const {
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return MFI && MFI->isImmutableObjectIndex(FI);
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}
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bool FixedStackPseudoSourceValue::isAliased(const MachineFrameInfo *MFI) const {
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if (!MFI)
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return true;
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return MFI->isAliasedObjectIndex(FI);
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}
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bool FixedStackPseudoSourceValue::mayAlias(const MachineFrameInfo *MFI) const {
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if (!MFI)
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return true;
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// Spill slots will not alias any LLVM IR value.
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return !MFI->isSpillSlotObjectIndex(FI);
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}
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void FixedStackPseudoSourceValue::printCustom(raw_ostream &OS) const {
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OS << "FixedStack" << FI;
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}
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