mirror of
https://github.com/c64scene-ar/llvm-6502.git
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0b8c9a80f2
into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
133 lines
4.0 KiB
C++
133 lines
4.0 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(), E = FSValues.end(); 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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const PseudoSourceValue *PseudoSourceValue::getGOT()
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{ return &PSVGlobals->PSVs[1]; }
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const PseudoSourceValue *PseudoSourceValue::getJumpTable()
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{ return &PSVGlobals->PSVs[2]; }
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const PseudoSourceValue *PseudoSourceValue::getConstantPool()
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{ return &PSVGlobals->PSVs[3]; }
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static const char *const PSVNames[] = {
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"Stack",
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"GOT",
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"JumpTable",
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"ConstantPool"
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};
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// FIXME: THIS IS A HACK!!!!
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// Eventually these should be uniqued on LLVMContext rather than in a managed
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// static. For now, we can safely use the global context for the time being to
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// squeak by.
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PseudoSourceValue::PseudoSourceValue(enum ValueTy Subclass) :
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Value(Type::getInt8PtrTy(getGlobalContext()),
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Subclass) {}
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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() ||
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this == getConstantPool() ||
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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() ||
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this == getGOT() ||
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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() ||
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this == getConstantPool() ||
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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(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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// Negative frame indices are used for special things that don't
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// appear in LLVM IR. Non-negative indices may be used for things
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// like static allocas.
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if (!MFI)
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return FI >= 0;
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// Spill slots should not alias others.
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return !MFI->isFixedObjectIndex(FI) && !MFI->isSpillSlotObjectIndex(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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