src/third_party/mozjs/js/src/jit/x86/Lowering-x86.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef jit_x86_Lowering_x86_h
#define jit_x86_Lowering_x86_h

#include "jit/shared/Lowering-x86-shared.h"

namespace js {
namespace jit {

class LIRGeneratorX86 : public LIRGeneratorX86Shared
{
  public:
    LIRGeneratorX86(MIRGenerator *gen, MIRGraph &graph, LIRGraph &lirGraph)
      : LIRGeneratorX86Shared(gen, graph, lirGraph)
    { }

  protected:
    // Adds a box input to an instruction, setting operand |n| to the type and
    // |n+1| to the payload.
    bool useBox(LInstruction *lir, size_t n, MDefinition *mir,
                LUse::Policy policy = LUse::REGISTER, bool useAtStart = false);
    bool useBoxFixed(LInstruction *lir, size_t n, MDefinition *mir, Register reg1, Register reg2);

    inline LDefinition tempToUnbox() {
        return LDefinition::BogusTemp();
    }

    void lowerUntypedPhiInput(MPhi *phi, uint32_t inputPosition, LBlock *block, size_t lirIndex);
    bool defineUntypedPhi(MPhi *phi, size_t lirIndex);

    LGetPropertyCacheT *newLGetPropertyCacheT(MGetPropertyCache *ins);

  public:
    bool visitBox(MBox *box);
    bool visitUnbox(MUnbox *unbox);
    bool visitReturn(MReturn *ret);
    bool visitStoreTypedArrayElement(MStoreTypedArrayElement *ins);
    bool visitStoreTypedArrayElementHole(MStoreTypedArrayElementHole *ins);
    bool visitAsmJSUnsignedToDouble(MAsmJSUnsignedToDouble *ins);
    bool visitAsmJSStoreHeap(MAsmJSStoreHeap *ins);
    bool visitAsmJSLoadFuncPtr(MAsmJSLoadFuncPtr *ins);
    bool visitStoreTypedArrayElementStatic(MStoreTypedArrayElementStatic *ins);
    bool lowerPhi(MPhi *phi);

    static bool allowTypedElementHoleCheck() {
        return true;
    }

    static bool allowStaticTypedArrayAccesses() {
        return true;
    }
};

typedef LIRGeneratorX86 LIRGeneratorSpecific;

} // namespace js
} // namespace jit

#endif /* jit_x86_Lowering_x86_h */