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125 lines
3.4 KiB
C++
125 lines
3.4 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#pragma once
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#include "Luau/Bytecode.h"
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#include "Luau/Common.h"
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#include "Luau/DenseHash.h"
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#include "Luau/IrData.h"
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#include <vector>
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struct Proto;
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typedef uint32_t Instruction;
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namespace Luau
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{
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namespace CodeGen
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{
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struct AssemblyOptions;
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struct IrBuilder
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{
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IrBuilder();
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void buildFunctionIr(Proto* proto);
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void rebuildBytecodeBasicBlocks(Proto* proto);
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void translateInst(LuauOpcode op, const Instruction* pc, int i);
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void handleFastcallFallback(IrOp fallbackOrUndef, const Instruction* pc, int i);
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bool isInternalBlock(IrOp block);
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void beginBlock(IrOp block);
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void loadAndCheckTag(IrOp loc, uint8_t tag, IrOp fallback);
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// Clones all instructions into the current block
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// Source block that is cloned cannot use values coming in from a predecessor
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void clone(const IrBlock& source, bool removeCurrentTerminator);
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IrOp undef();
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IrOp constInt(int value);
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IrOp constUint(unsigned value);
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IrOp constDouble(double value);
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IrOp constTag(uint8_t value);
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IrOp constAny(IrConst constant, uint64_t asCommonKey);
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IrOp cond(IrCondition cond);
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IrOp inst(IrCmd cmd);
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IrOp inst(IrCmd cmd, IrOp a);
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IrOp inst(IrCmd cmd, IrOp a, IrOp b);
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IrOp inst(IrCmd cmd, IrOp a, IrOp b, IrOp c);
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IrOp inst(IrCmd cmd, IrOp a, IrOp b, IrOp c, IrOp d);
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IrOp inst(IrCmd cmd, IrOp a, IrOp b, IrOp c, IrOp d, IrOp e);
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IrOp inst(IrCmd cmd, IrOp a, IrOp b, IrOp c, IrOp d, IrOp e, IrOp f);
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IrOp block(IrBlockKind kind); // Requested kind can be ignored if we are in an outlined sequence
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IrOp blockAtInst(uint32_t index);
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IrOp vmReg(uint8_t index);
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IrOp vmConst(uint32_t index);
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IrOp vmUpvalue(uint8_t index);
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IrOp vmExit(uint32_t pcpos);
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bool inTerminatedBlock = false;
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bool interruptRequested = false;
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bool activeFastcallFallback = false;
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IrOp fastcallFallbackReturn;
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int fastcallSkipTarget = -1;
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IrFunction function;
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uint32_t activeBlockIdx = ~0u;
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std::vector<uint32_t> instIndexToBlock; // Block index at the bytecode instruction
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std::vector<IrOp> loopStepStack;
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// Similar to BytecodeBuilder, duplicate constants are removed used the same method
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struct ConstantKey
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{
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IrConstKind kind;
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// Note: this stores value* from IrConst; when kind is Double, this stores the same bits as double does but in uint64_t.
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uint64_t value;
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bool operator==(const ConstantKey& key) const
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{
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return kind == key.kind && value == key.value;
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}
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};
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struct ConstantKeyHash
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{
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size_t operator()(const ConstantKey& key) const
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{
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// finalizer from MurmurHash64B
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const uint32_t m = 0x5bd1e995;
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uint32_t h1 = uint32_t(key.value);
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uint32_t h2 = uint32_t(key.value >> 32) ^ (int(key.kind) * m);
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h1 ^= h2 >> 18;
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h1 *= m;
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h2 ^= h1 >> 22;
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h2 *= m;
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h1 ^= h2 >> 17;
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h1 *= m;
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h2 ^= h1 >> 19;
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h2 *= m;
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// ... truncated to 32-bit output (normally hash is equal to (uint64_t(h1) << 32) | h2, but we only really need the lower 32-bit half)
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return size_t(h2);
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}
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};
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DenseHashMap<ConstantKey, uint32_t, ConstantKeyHash> constantMap;
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};
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} // namespace CodeGen
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} // namespace Luau
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