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/*
* Copyright (C) 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(B3_JIT)
#include "AirArg.h"
#include "AirInst.h"
#include "B3Type.h"
#include <wtf/Vector.h>
namespace JSC { namespace B3 {
class CCallValue;
class BasicBlock;
namespace Air {
class Code;
Vector<Arg> computeCCallingConvention(Code&, CCallValue*);
size_t cCallResultCount(Code&, CCallValue*);
bool cCallArgumentEvenRegisterAlignment(Type);
/*
* On some platforms (well, on 32-bit platforms,) C functions can take arguments
* that need more than one Air::Arg to pass around. These functions serve as a
* source of truth about how args of a CCallValue must be represented by the time we
* lower to Air.
*/
// Return the number of Air::Args needed to marshall this Value to the C function
size_t cCallArgumentRegisterCount(Type);
// Return the width of the individual Air::Args needed to marshall this value
Width cCallArgumentRegisterWidth(Type);
Tmp cCallResult(Code&, CCallValue*, unsigned);
Inst buildCCall(Code&, Value* origin, const Vector<Arg>&);
template<unsigned size> constexpr inline Type b3IntegerType;
template<> constexpr inline Type b3IntegerType<4> = Int32;
template<> constexpr inline Type b3IntegerType<8> = Int64;
template<typename T> constexpr inline Type b3Type;
template<> constexpr inline Type b3Type<int> = b3IntegerType<sizeof(int)>;
template<> constexpr inline Type b3Type<long> = b3IntegerType<sizeof(long)>;
template<> constexpr inline Type b3Type<long long> = b3IntegerType<sizeof(long long)>;
template<> constexpr inline Type b3Type<unsigned> = b3IntegerType<sizeof(unsigned)>;
template<> constexpr inline Type b3Type<unsigned long> = b3IntegerType<sizeof(unsigned long)>;
template<> constexpr inline Type b3Type<unsigned long long> = b3IntegerType<sizeof(unsigned long long)>;
template<> constexpr inline Type b3Type<float> = Float;
template<> constexpr inline Type b3Type<double> = Double;
template<typename T> constexpr inline Type b3Type<T*> = pointerType();
// This maps between B3 args and air args.
// On 32-bit platforms only, this may be an n:m mapping.
struct ArgumentValueList {
#if CPU(ARM_THUMB2)
JS_EXPORT_PRIVATE Value* makeStitch(B3::BasicBlock*, Value* hi, Value* low) const;
#endif
JS_EXPORT_PRIVATE Value* makeCCallValue(B3::BasicBlock*, Type, Air::Arg) const;
JS_EXPORT_PRIVATE Value* makeCCallValue(B3::BasicBlock*, size_t idx) const;
inline Value* operator[](size_t idx) const
{
return makeCCallValue(block, idx);
}
inline Value* withBlock(B3::BasicBlock *bb, size_t idx) const
{
return makeCCallValue(bb, idx);
}
inline Vector<Value*> eager() const
{
Vector<Value*> result;
for (size_t i = 0; i < types.size(); ++i)
result.append(makeCCallValue(block, i));
return result;
}
Procedure& procedure;
B3::BasicBlock* block;
Vector<Type> types;
Vector<Air::Arg> underlyingArgs;
Vector<unsigned> argUnderlyingCounts;
};
JS_EXPORT_PRIVATE ArgumentValueList computeCCallArguments(Procedure&, B3::BasicBlock*, const Vector<Type>&);
template<typename ... T>
ArgumentValueList cCallArgumentValues(Procedure& procedure, B3::BasicBlock* block)
{
return computeCCallArguments(procedure, block, { b3Type<T> ... });
}
} } } // namespace JSC::B3::Air
#endif // ENABLE(B3_JIT)
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