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/*
* Copyright (C) 2019-2023 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 "AirLiveness.h"
#include "AirTmpMap.h"
#include <wtf/Nonmovable.h>
#include <wtf/TZoneMalloc.h>
namespace JSC {
class CCallHelpers;
namespace B3 { namespace Air {
class Code;
class GenerateAndAllocateRegisters {
WTF_MAKE_TZONE_ALLOCATED(GenerateAndAllocateRegisters);
WTF_MAKE_NONMOVABLE(GenerateAndAllocateRegisters);
struct TmpData {
StackSlot* spillSlot { nullptr };
Reg reg;
};
public:
GenerateAndAllocateRegisters(Code&);
void prepareForGeneration();
void generate(CCallHelpers&);
private:
void insertBlocksForFlushAfterTerminalPatchpoints();
void release(Tmp, Reg);
void flush(Tmp, Reg);
void spill(Tmp, Reg);
void alloc(Tmp, Reg, Arg::Role);
void freeDeadTmpsAtCurrentInst();
void freeDeadTmpsAtCurrentBlock();
bool assignTmp(Tmp&, Bank, Arg::Role);
void buildLiveRanges(UnifiedTmpLiveness&);
bool isDisallowedRegister(Reg);
void checkConsistency();
Code& m_code;
CCallHelpers* m_jit { nullptr };
TmpMap<TmpData> m_map;
#if ASSERT_ENABLED
Vector<Tmp> m_allTmps[numBanks];
#endif
Vector<Reg> m_registers[numBanks];
ScalarRegisterSet m_availableRegs[numBanks];
size_t m_globalInstIndex;
IndexMap<Reg, Tmp>* m_currentAllocation { nullptr };
TmpMap<size_t> m_liveRangeEnd;
HashMap<size_t, Vector<Tmp, 2>> m_tmpsToRelease;
RegisterSet m_namedUsedRegs;
RegisterSet m_namedDefdRegs;
RegisterSetBuilder m_earlyClobber;
RegisterSetBuilder m_lateClobber;
RegisterSetBuilder m_clobberedToClear;
RegisterSet m_allowedRegisters;
std::unique_ptr<UnifiedTmpLiveness> m_liveness;
struct PatchSpillData {
MacroAssembler::Jump jump;
MacroAssembler::Label continueLabel;
HashMap<Tmp, Arg*> defdTmps;
};
HashMap<BasicBlock*, PatchSpillData> m_blocksAfterTerminalPatchForSpilling;
};
} } } // namespace JSC::B3::Air
#endif // ENABLE(B3_JIT)
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