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62483d40f0
* Fixed rare use-after-free in analysis during table unification A lot of work these past months went into two new Luau components: * A near full rewrite of the typechecker using a new deferred constraint resolution system * Native code generation for AoT/JiT compilation of VM bytecode into x64 (avx)/arm64 instructions Both of these components are far from finished and we don't provide documentation on building and using them at this point. However, curious community members expressed interest in learning about changes that go into these components each week, so we are now listing them here in the 'sync' pull request descriptions. --- New typechecker can be enabled by setting DebugLuauDeferredConstraintResolution flag to 'true'. It is considered unstable right now, so try it at your own risk. Even though it already provides better type inference than the current one in some cases, our main goal right now is to reach feature parity with current typechecker. Features which improve over the capabilities of the current typechecker are marked as '(NEW)'. Changes to new typechecker: * Regular for loop index and parameters are now typechecked * Invalid type annotations on local variables are ignored to improve autocomplete * Fixed missing autocomplete type suggestions for function arguments * Type reduction is now performed to produce simpler types to be presented to the user (error messages, custom LSPs) * Internally, complex types like '((number | string) & ~(false?)) | string' can be produced, which is just 'string | number' when simplified * Fixed spots where support for unknown and never types was missing * (NEW) Length operator '#' is now valid to use on top table type, this type comes up when doing typeof(x) == "table" guards and isn't available in current typechecker --- Changes to native code generation: * Additional math library fast calls are now lowered to x64: math.ldexp, math.round, math.frexp, math.modf, math.sign and math.clamp
89 lines
2.4 KiB
C++
89 lines
2.4 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/AssemblyBuilderX64.h"
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#include "Luau/IrData.h"
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#include <array>
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#include <initializer_list>
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#include <vector>
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struct Proto;
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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 ModuleHelpers;
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struct NativeState;
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struct AssemblyOptions;
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struct IrLoweringX64
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{
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// Some of these arguments are only required while we re-use old direct bytecode to x64 lowering
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IrLoweringX64(AssemblyBuilderX64& build, ModuleHelpers& helpers, NativeState& data, Proto* proto, IrFunction& function);
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void lower(AssemblyOptions options);
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void lowerInst(IrInst& inst, uint32_t index, IrBlock& next);
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bool isFallthroughBlock(IrBlock target, IrBlock next);
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void jumpOrFallthrough(IrBlock& target, IrBlock& next);
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// Operand data lookup helpers
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OperandX64 memRegDoubleOp(IrOp op) const;
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OperandX64 memRegTagOp(IrOp op) const;
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RegisterX64 regOp(IrOp op) const;
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IrConst constOp(IrOp op) const;
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uint8_t tagOp(IrOp op) const;
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bool boolOp(IrOp op) const;
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int intOp(IrOp op) const;
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unsigned uintOp(IrOp op) const;
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double doubleOp(IrOp op) const;
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IrBlock& blockOp(IrOp op) const;
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Label& labelOp(IrOp op) const;
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// Unscoped register allocation
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RegisterX64 allocGprReg(SizeX64 preferredSize);
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RegisterX64 allocXmmReg();
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RegisterX64 allocGprRegOrReuse(SizeX64 preferredSize, uint32_t index, std::initializer_list<IrOp> oprefs);
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RegisterX64 allocXmmRegOrReuse(uint32_t index, std::initializer_list<IrOp> oprefs);
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void freeReg(RegisterX64 reg);
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void freeLastUseReg(IrInst& target, uint32_t index);
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void freeLastUseRegs(const IrInst& inst, uint32_t index);
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ConditionX64 getX64Condition(IrCondition cond) const;
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struct ScopedReg
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{
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ScopedReg(IrLoweringX64& owner, SizeX64 size);
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~ScopedReg();
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ScopedReg(const ScopedReg&) = delete;
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ScopedReg& operator=(const ScopedReg&) = delete;
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void free();
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IrLoweringX64& owner;
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RegisterX64 reg;
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};
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AssemblyBuilderX64& build;
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ModuleHelpers& helpers;
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NativeState& data;
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Proto* proto = nullptr; // Temporarily required to provide 'Instruction* pc' to old emitInst* methods
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IrFunction& function;
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std::array<bool, 16> freeGprMap;
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std::array<bool, 16> freeXmmMap;
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};
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} // namespace CodeGen
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} // namespace Luau
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