93 lines
2.6 KiB
C++
93 lines
2.6 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/MachineFrameInfo.h"
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#include "llvm/CodeGen/PseudoSourceValue.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/ManagedStatic.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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static ManagedStatic<PseudoSourceValue[4]> PSVs;
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const PseudoSourceValue *PseudoSourceValue::getStack()
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{ return &(*PSVs)[0]; }
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const PseudoSourceValue *PseudoSourceValue::getGOT()
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{ return &(*PSVs)[1]; }
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const PseudoSourceValue *PseudoSourceValue::getJumpTable()
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{ return &(*PSVs)[2]; }
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const PseudoSourceValue *PseudoSourceValue::getConstantPool()
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{ return &(*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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PseudoSourceValue::PseudoSourceValue() :
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Value(PointerType::getUnqual(Type::Int8Ty), PseudoSourceValueVal) {}
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void PseudoSourceValue::dump() const {
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print(errs()); errs() << '\n';
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}
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void PseudoSourceValue::print(raw_ostream &OS) const {
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OS << PSVNames[this - *PSVs];
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}
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namespace {
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/// FixedStackPseudoSourceValue - A specialized PseudoSourceValue
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/// for holding FixedStack values, which must include a frame
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/// index.
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class VISIBILITY_HIDDEN FixedStackPseudoSourceValue
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: public PseudoSourceValue {
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const int FI;
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public:
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explicit FixedStackPseudoSourceValue(int fi) : FI(fi) {}
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virtual bool isConstant(const MachineFrameInfo *MFI) const;
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virtual void print(raw_ostream &OS) const {
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OS << "FixedStack" << FI;
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}
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};
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}
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static ManagedStatic<std::map<int, const PseudoSourceValue *> > FSValues;
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const PseudoSourceValue *PseudoSourceValue::getFixedStack(int FI) {
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const PseudoSourceValue *&V = (*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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assert(0 && "Unknown PseudoSourceValue!");
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return false;
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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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