1349 lines
44 KiB
C#
1349 lines
44 KiB
C#
using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using System.Globalization;
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using System.Text;
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using NubLang.Tokenization;
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using NubLang.TypeChecking.Node;
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namespace NubLang.Generation.QBE;
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public class QBEGenerator
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{
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private readonly TypedSyntaxTree _syntaxTree;
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private readonly TypedDefinitionTable _definitionTable;
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private readonly QBEWriter _writer;
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private readonly List<CStringLiteral> _cStringLiterals = [];
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private readonly List<StringLiteral> _stringLiterals = [];
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private readonly Stack<string> _breakLabels = [];
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private readonly Stack<string> _continueLabels = [];
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private readonly Stack<Scope> _scopes = [];
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private int _tmpIndex;
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private int _labelIndex;
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private int _cStringLiteralIndex;
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private int _stringLiteralIndex;
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private bool _codeIsReachable = true;
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private Scope Scope => _scopes.Peek();
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public QBEGenerator(TypedSyntaxTree syntaxTree, TypedDefinitionTable definitionTable)
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{
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_syntaxTree = syntaxTree;
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_definitionTable = definitionTable;
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_writer = new QBEWriter();
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}
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public string Emit()
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{
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_cStringLiterals.Clear();
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_stringLiterals.Clear();
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_breakLabels.Clear();
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_continueLabels.Clear();
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_scopes.Clear();
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_tmpIndex = 0;
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_labelIndex = 0;
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_cStringLiteralIndex = 0;
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_stringLiteralIndex = 0;
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_codeIsReachable = true;
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foreach (var structDef in _definitionTable.GetStructs())
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{
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EmitStructTypeDefinition(structDef);
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_writer.NewLine();
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}
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foreach (var structDef in _syntaxTree.Definitions.OfType<StructNode>())
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{
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EmitStructDefinition(structDef);
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_writer.NewLine();
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}
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foreach (var funcDef in _syntaxTree.Definitions.OfType<LocalFuncNode>())
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{
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EmitLocalFuncDefinition(funcDef);
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_writer.NewLine();
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}
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foreach (var structDef in _syntaxTree.Definitions.OfType<StructNode>().Where(x => x.InterfaceImplementations.Count > 0))
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{
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_writer.Write($"data {StructVtableName(structDef.Name)} = {{ ");
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foreach (var interfaceImplementation in structDef.InterfaceImplementations)
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{
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var interfaceDef = _definitionTable.LookupInterface(interfaceImplementation.Name);
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foreach (var func in interfaceDef.Functions)
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{
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_writer.Write($"l {StructFuncName(structDef.Name, func.Name)}, ");
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}
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}
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_writer.WriteLine("}");
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}
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foreach (var cStringLiteral in _cStringLiterals)
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{
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_writer.WriteLine($"data {cStringLiteral.Name} = {{ b \"{cStringLiteral.Value}\", b 0 }}");
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}
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foreach (var stringLiteral in _stringLiterals)
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{
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var bytes = Encoding.UTF8.GetBytes(stringLiteral.Value).Select(b => $"b {b}");
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_writer.WriteLine($"data {stringLiteral.Name} = {{ l {stringLiteral.Value.Length}, {string.Join(", ", bytes)} }}");
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}
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return _writer.ToString();
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}
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private static string QBEAssign(TypeNode type)
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{
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if (type.IsSimpleType(out var simpleType, out _))
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{
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return simpleType.StorageSize switch
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{
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StorageSize.I8 or StorageSize.U8 or StorageSize.I16 or StorageSize.U16 or StorageSize.I32 or StorageSize.U32 => "=w",
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StorageSize.I64 or StorageSize.U64 => "=l",
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StorageSize.F32 => "=s",
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StorageSize.F64 => "=d",
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_ => throw new ArgumentOutOfRangeException(nameof(simpleType.StorageSize))
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};
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}
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return "=l";
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}
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private void EmitStore(TypeNode type, string value, string destination)
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{
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string store;
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if (type.IsSimpleType(out var simpleType, out _))
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{
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store = simpleType.StorageSize switch
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{
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StorageSize.I8 or StorageSize.U8 => "storeb",
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StorageSize.I16 or StorageSize.U16 => "storeh",
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StorageSize.I32 or StorageSize.U32 => "storew",
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StorageSize.I64 or StorageSize.U64 => "storel",
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StorageSize.F32 => "stores",
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StorageSize.F64 => "stored",
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_ => throw new ArgumentOutOfRangeException(nameof(simpleType.StorageSize))
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};
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}
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else
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{
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store = "storel";
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}
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_writer.Indented($"{store} {value}, {destination}");
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}
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private string EmitLoad(TypeNode type, string from)
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{
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string load;
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if (type.IsSimpleType(out var simpleType, out _))
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{
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load = simpleType.StorageSize switch
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{
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StorageSize.I64 or StorageSize.U64 => "loadl",
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StorageSize.I32 or StorageSize.U32 => "loadw",
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StorageSize.I16 => "loadsh",
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StorageSize.I8 => "loadsb",
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StorageSize.U16 => "loaduh",
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StorageSize.U8 => "loadub",
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StorageSize.F64 => "loadd",
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StorageSize.F32 => "loads",
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_ => throw new ArgumentOutOfRangeException(nameof(simpleType.StorageSize))
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};
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}
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else
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{
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load = "loadl";
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}
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var into = TmpName();
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_writer.Indented($"{into} {QBEAssign(type)} {load} {from}");
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return into;
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}
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private void EmitMemcpy(string source, string destination, string length)
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{
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_writer.Indented($"call $nub_memcpy(l {source}, l {destination}, l {length})");
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}
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private string EmitArraySizeInBytes(ArrayTypeNode type, string array)
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{
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var size = TmpName();
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_writer.Indented($"{size} =l loadl {array}");
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_writer.Indented($"{size} =l mul {size}, {SizeOf(type.ElementType)}");
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_writer.Indented($"{size} =l add {size}, 8");
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return size;
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}
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private string EmitCStringSizeInBytes(string cstring)
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{
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var size = TmpName();
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_writer.Indented($"{size} =l call $nub_cstring_length(l {cstring})");
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_writer.Indented($"{size} =l add {size}, 1");
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return size;
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}
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private string EmitStringSizeInBytes(string nubstring)
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{
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var size = TmpName();
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_writer.Indented($"{size} =l loadl {nubstring}");
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_writer.Indented($"{size} =l add {size}, 8");
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return size;
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}
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private bool EmitTryMoveInto(ExpressionNode source, string destinationLValue)
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{
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switch (source)
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{
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case ArrayInitializerNode arrayInitializer:
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{
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EmitStore(source.Type, EmitArrayInitializer(arrayInitializer), destinationLValue);
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return true;
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}
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case StructInitializerNode structInitializer:
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{
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EmitStructInitializer(structInitializer, destinationLValue);
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return true;
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}
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case InterfaceInitializerNode interfaceInitializer:
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{
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EmitInterfaceInitializer(interfaceInitializer, destinationLValue);
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return true;
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}
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case LiteralNode { Kind: LiteralKind.String } literal:
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{
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EmitStore(source.Type, EmitLiteral(literal), destinationLValue);
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return true;
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}
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}
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return false;
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}
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private void EmitCopyIntoOrInitialize(ExpressionNode source, string destinationLValue)
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{
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// If the source is a value which is not used yet such as an array/struct initializer or literal, we can skip copying
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if (EmitTryMoveInto(source, destinationLValue))
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{
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return;
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}
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var value = EmitUnwrap(EmitExpression(source));
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if (source.Type.IsSimpleType(out var simpleType, out var complexType))
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{
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EmitStore(simpleType, value, destinationLValue);
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}
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else
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{
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if (complexType is StructTypeNode or InterfaceTypeNode)
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{
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EmitMemcpy(value, destinationLValue, SizeOf(complexType).ToString());
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}
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else
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{
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var size = complexType switch
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{
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ArrayTypeNode arrayType => EmitArraySizeInBytes(arrayType, value),
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CStringTypeNode => EmitCStringSizeInBytes(value),
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StringTypeNode => EmitStringSizeInBytes(value),
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_ => throw new ArgumentOutOfRangeException(nameof(source.Type))
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};
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var buffer = TmpName();
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_writer.Indented($"{buffer} =l alloc8 {size}");
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EmitMemcpy(value, buffer, size);
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EmitStore(complexType, buffer, destinationLValue);
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}
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}
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}
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private bool EmitTryCreateWithoutCopy(ExpressionNode source, [NotNullWhen(true)] out string? destination)
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{
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switch (source)
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{
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case ArrayInitializerNode:
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case StructInitializerNode:
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case InterfaceInitializerNode:
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case LiteralNode { Kind: LiteralKind.String }:
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{
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destination = EmitUnwrap(EmitExpression(source));
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return true;
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}
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}
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destination = null;
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return false;
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}
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private string EmitCreateCopyOrInitialize(ExpressionNode source)
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{
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// If the source is a value which is not used yet such as an array/struct/interface initializer or literal, we can skip copying
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if (EmitTryCreateWithoutCopy(source, out var uncopiedValue))
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{
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return uncopiedValue;
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}
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var value = EmitUnwrap(EmitExpression(source));
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if (source.Type.IsSimpleType(out _, out var complexType))
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{
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// Simple types are passed in registers and are therefore always copied
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return value;
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}
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var size = complexType switch
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{
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ArrayTypeNode arrayType => EmitArraySizeInBytes(arrayType, value),
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CStringTypeNode => EmitCStringSizeInBytes(value),
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StringTypeNode => EmitStringSizeInBytes(value),
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InterfaceTypeNode interfaceType => SizeOf(interfaceType).ToString(),
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StructTypeNode structType => SizeOf(structType).ToString(),
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_ => throw new ArgumentOutOfRangeException(nameof(source.Type))
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};
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var destination = TmpName();
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_writer.Indented($"{destination} =l alloc8 {size}");
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EmitMemcpy(value, destination, size);
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return destination;
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}
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// Utility to create QBE type names for function parameters and return types
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private string FuncQBETypeName(TypeNode type)
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{
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if (type.IsSimpleType(out var simpleType, out var complexType))
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{
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return simpleType.StorageSize switch
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{
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StorageSize.I64 or StorageSize.U64 => "l",
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StorageSize.I32 or StorageSize.U32 => "w",
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StorageSize.I16 => "sh",
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StorageSize.I8 => "sb",
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StorageSize.U16 => "uh",
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StorageSize.U8 => "ub",
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StorageSize.F64 => "d",
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StorageSize.F32 => "s",
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_ => throw new ArgumentOutOfRangeException()
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};
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}
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if (complexType is StructTypeNode structType)
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{
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return StructTypeName(structType.Name);
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}
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return "l";
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}
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private void EmitLocalFuncDefinition(LocalFuncNode funcDef)
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{
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_labelIndex = 0;
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_tmpIndex = 0;
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_writer.Write("export function ");
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if (funcDef.Signature.ReturnType is not VoidTypeNode)
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{
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_writer.Write(FuncQBETypeName(funcDef.Signature.ReturnType) + ' ');
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}
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_writer.Write(LocalFuncName(funcDef));
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_writer.Write("(");
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foreach (var parameter in funcDef.Signature.Parameters)
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{
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_writer.Write(FuncQBETypeName(parameter.Type) + $" %{parameter.Name}");
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}
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_writer.WriteLine(") {");
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_writer.WriteLine("@start");
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var scope = new Scope();
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foreach (var parameter in funcDef.Signature.Parameters)
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{
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scope.Declare(parameter.Name, new Val("%" + parameter.Name, parameter.Type, false));
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}
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EmitBlock(funcDef.Body, scope);
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// Implicit return for void functions if no explicit return has been set
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if (funcDef.Signature.ReturnType is VoidTypeNode && funcDef.Body.Statements is [.., not ReturnNode])
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{
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_writer.Indented("ret");
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}
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_writer.WriteLine("}");
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}
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private void EmitStructDefinition(StructNode structDef)
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{
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for (var i = 0; i < structDef.Functions.Count; i++)
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{
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var function = structDef.Functions[i];
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_labelIndex = 0;
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_tmpIndex = 0;
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_writer.Write("export function ");
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if (function.Signature.ReturnType is not VoidTypeNode)
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{
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_writer.Write(FuncQBETypeName(function.Signature.ReturnType) + ' ');
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}
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_writer.Write(StructFuncName(structDef.Name, function.Name));
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_writer.Write("(l %this, ");
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foreach (var parameter in function.Signature.Parameters)
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{
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_writer.Write(FuncQBETypeName(parameter.Type) + $" %{parameter.Name}, ");
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}
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_writer.WriteLine(") {");
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_writer.WriteLine("@start");
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var scope = new Scope();
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scope.Declare("this", new Val("%this", structDef.Type, false));
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foreach (var parameter in function.Signature.Parameters)
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{
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scope.Declare(parameter.Name, new Val("%" + parameter.Name, parameter.Type, false));
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}
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EmitBlock(function.Body, scope);
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// Implicit return for void functions if no explicit return has been set
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if (function.Signature.ReturnType is VoidTypeNode && function.Body.Statements is [.., not ReturnNode])
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{
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_writer.Indented("ret");
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}
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_writer.WriteLine("}");
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if (i != structDef.Functions.Count - 1)
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{
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_writer.NewLine();
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}
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}
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}
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private void EmitStructTypeDefinition(StructNode structDef)
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{
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_writer.WriteLine($"type {StructTypeName(structDef.Name)} = {{ ");
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var types = new Dictionary<string, string>();
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foreach (var field in structDef.Fields)
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{
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types.Add(field.Name, StructDefQBEType(field));
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}
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var longest = types.Values.Max(x => x.Length);
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foreach (var (name, type) in types)
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{
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var padding = longest - type.Length;
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_writer.Indented($"{type},{new string(' ', padding)} # {name}");
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}
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_writer.WriteLine("}");
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return;
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string StructDefQBEType(StructFieldNode field)
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{
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if (field.Type.IsSimpleType(out var simpleType, out var complexType))
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{
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return simpleType.StorageSize switch
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{
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StorageSize.I64 or StorageSize.U64 => "l",
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StorageSize.I32 or StorageSize.U32 => "w",
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StorageSize.I16 or StorageSize.U16 => "h",
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StorageSize.I8 or StorageSize.U8 => "b",
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StorageSize.F64 => "d",
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StorageSize.F32 => "s",
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_ => throw new ArgumentOutOfRangeException()
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};
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}
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if (complexType is StructTypeNode structType)
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{
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return StructTypeName(structType.Name);
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}
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return "l";
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}
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}
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private void EmitBlock(BlockNode block, Scope? scope = null)
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{
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_scopes.Push(scope ?? Scope.SubScope());
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foreach (var statement in block.Statements)
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{
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if (_codeIsReachable)
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{
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EmitStatement(statement);
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}
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}
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_scopes.Pop();
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_codeIsReachable = true;
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}
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private void EmitStatement(StatementNode statement)
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{
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switch (statement)
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{
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case AssignmentNode assignment:
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EmitAssignment(assignment);
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break;
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case BreakNode:
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EmitBreak();
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break;
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case ContinueNode:
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EmitContinue();
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break;
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case IfNode ifStatement:
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EmitIf(ifStatement);
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break;
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case ReturnNode @return:
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EmitReturn(@return);
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break;
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case StatementExpressionNode statementExpression:
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EmitExpression(statementExpression.Expression);
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break;
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case VariableDeclarationNode variableDeclaration:
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EmitVariableDeclaration(variableDeclaration);
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break;
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case WhileNode whileStatement:
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EmitWhile(whileStatement);
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break;
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default:
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throw new ArgumentOutOfRangeException(nameof(statement));
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}
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}
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private void EmitAssignment(AssignmentNode assignment)
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{
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if (!assignment.Target.IsLValue)
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{
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throw new UnreachableException("Destination of assignment must be an lvalue. This should have been caught in the type checker");
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}
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var destination = EmitExpression(assignment.Target);
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EmitCopyIntoOrInitialize(assignment.Value, destination.Name);
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}
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private void EmitBreak()
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{
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_writer.Indented($"jmp {_breakLabels.Peek()}");
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_codeIsReachable = false;
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}
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private void EmitContinue()
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{
|
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_writer.Indented($"jmp {_continueLabels.Peek()}");
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_codeIsReachable = false;
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}
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private void EmitIf(IfNode ifStatement)
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{
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var trueLabel = LabelName();
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var falseLabel = LabelName();
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var endLabel = LabelName();
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var result = EmitUnwrap(EmitExpression(ifStatement.Condition));
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_writer.Indented($"jnz {result}, {trueLabel}, {falseLabel}");
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_writer.WriteLine(trueLabel);
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EmitBlock(ifStatement.Body);
|
|
_writer.Indented($"jmp {endLabel}");
|
|
_writer.WriteLine(falseLabel);
|
|
if (ifStatement.Else.HasValue)
|
|
{
|
|
ifStatement.Else.Value.Match
|
|
(
|
|
elseIfNode => EmitIf(elseIfNode),
|
|
elseNode => EmitBlock(elseNode)
|
|
);
|
|
}
|
|
|
|
_writer.WriteLine(endLabel);
|
|
}
|
|
|
|
private void EmitReturn(ReturnNode @return)
|
|
{
|
|
if (@return.Value.HasValue)
|
|
{
|
|
var result = EmitUnwrap(EmitExpression(@return.Value.Value));
|
|
_writer.Indented($"ret {result}");
|
|
}
|
|
else
|
|
{
|
|
_writer.Indented("ret");
|
|
}
|
|
}
|
|
|
|
private void EmitVariableDeclaration(VariableDeclarationNode variableDeclaration)
|
|
{
|
|
var name = $"%{variableDeclaration.Name}";
|
|
_writer.Indented($"{name} =l alloc8 8");
|
|
|
|
if (variableDeclaration.Assignment.HasValue)
|
|
{
|
|
var value = EmitCreateCopyOrInitialize(variableDeclaration.Assignment.Value);
|
|
EmitStore(variableDeclaration.Assignment.Value.Type, value, name);
|
|
}
|
|
|
|
Scope.Declare(variableDeclaration.Name, new Val(name, variableDeclaration.Type, true));
|
|
}
|
|
|
|
private void EmitWhile(WhileNode whileStatement)
|
|
{
|
|
var conditionLabel = LabelName();
|
|
var iterationLabel = LabelName();
|
|
var endLabel = LabelName();
|
|
|
|
_breakLabels.Push(endLabel);
|
|
_continueLabels.Push(conditionLabel);
|
|
|
|
_writer.Indented($"jmp {conditionLabel}");
|
|
_writer.WriteLine(iterationLabel);
|
|
EmitBlock(whileStatement.Body);
|
|
_writer.WriteLine(conditionLabel);
|
|
var result = EmitUnwrap(EmitExpression(whileStatement.Condition));
|
|
_writer.Indented($"jnz {result}, {iterationLabel}, {endLabel}");
|
|
_writer.WriteLine(endLabel);
|
|
|
|
_continueLabels.Pop();
|
|
_breakLabels.Pop();
|
|
}
|
|
|
|
private Val EmitExpression(ExpressionNode expression)
|
|
{
|
|
var value = expression switch
|
|
{
|
|
ArrayInitializerNode arrayInitializer => EmitArrayInitializer(arrayInitializer),
|
|
StructInitializerNode structInitializer => EmitStructInitializer(structInitializer),
|
|
AddressOfNode addressOf => EmitAddressOf(addressOf),
|
|
DereferenceNode dereference => EmitDereference(dereference),
|
|
BinaryExpressionNode binaryExpression => EmitBinaryExpression(binaryExpression),
|
|
FuncCallNode funcCallExpression => EmitFuncCall(funcCallExpression),
|
|
InterfaceFuncCallNode interfaceFuncCall => EmitInterfaceFuncCall(interfaceFuncCall),
|
|
InterfaceInitializerNode interfaceInitializer => EmitInterfaceInitializer(interfaceInitializer),
|
|
ExternFuncIdentNode externFuncIdent => EmitExternFuncIdent(externFuncIdent),
|
|
LocalFuncIdentNode localFuncIdent => EmitLocalFuncIdent(localFuncIdent),
|
|
VariableIdentNode variableIdent => EmitVariableIdent(variableIdent),
|
|
LiteralNode literal => EmitLiteral(literal),
|
|
UnaryExpressionNode unaryExpression => EmitUnaryExpression(unaryExpression),
|
|
StructFieldAccessNode structFieldAccess => EmitStructFieldAccess(structFieldAccess),
|
|
StructFuncCallNode structFuncCall => EmitStructFuncCall(structFuncCall),
|
|
ArrayIndexAccessNode arrayIndex => EmitArrayIndexAccess(arrayIndex),
|
|
_ => throw new ArgumentOutOfRangeException(nameof(expression))
|
|
};
|
|
|
|
return new Val(value, expression.Type, expression.IsLValue);
|
|
}
|
|
|
|
private string EmitArrayIndexAccess(ArrayIndexAccessNode arrayIndexAccess)
|
|
{
|
|
var array = EmitUnwrap(EmitExpression(arrayIndexAccess.Target));
|
|
var index = EmitUnwrap(EmitExpression(arrayIndexAccess.Index));
|
|
|
|
EmitArraysCheck(array, index);
|
|
|
|
var elementType = ((ArrayTypeNode)arrayIndexAccess.Target.Type).ElementType;
|
|
|
|
var pointer = TmpName();
|
|
_writer.Indented($"{pointer} =l mul {index}, {SizeOf(elementType)}");
|
|
_writer.Indented($"{pointer} =l add {pointer}, 8");
|
|
_writer.Indented($"{pointer} =l add {array}, {pointer}");
|
|
return pointer;
|
|
}
|
|
|
|
private void EmitArraysCheck(string array, string index)
|
|
{
|
|
var count = TmpName();
|
|
_writer.Indented($"{count} =l loadl {array}");
|
|
|
|
var isNegative = TmpName();
|
|
_writer.Indented($"{isNegative} =w csltl {index}, 0");
|
|
|
|
var isOob = TmpName();
|
|
_writer.Indented($"{isOob} =w csgel {index}, {count}");
|
|
|
|
var anyOob = TmpName();
|
|
_writer.Indented($"{anyOob} =w or {isNegative}, {isOob}");
|
|
|
|
var oobLabel = LabelName();
|
|
var notOobLabel = LabelName();
|
|
_writer.Indented($"jnz {anyOob}, {oobLabel}, {notOobLabel}");
|
|
|
|
_writer.Indented(oobLabel);
|
|
_writer.Indented($"call $nub_panic_array_oob()");
|
|
|
|
_writer.Indented(notOobLabel);
|
|
}
|
|
|
|
private string EmitArrayInitializer(ArrayInitializerNode arrayInitializer)
|
|
{
|
|
var capacity = EmitUnwrap(EmitExpression(arrayInitializer.Capacity));
|
|
var elementSize = SizeOf(arrayInitializer.ElementType);
|
|
|
|
var capacityInBytes = TmpName();
|
|
_writer.Indented($"{capacityInBytes} =l mul {capacity}, {elementSize}");
|
|
var totalSize = TmpName();
|
|
_writer.Indented($"{totalSize} =l add {capacityInBytes}, 8");
|
|
|
|
var arrayPointer = TmpName();
|
|
_writer.Indented($"{arrayPointer} =l alloc8 {totalSize}");
|
|
_writer.Indented($"storel {capacity}, {arrayPointer}");
|
|
|
|
var dataPointer = TmpName();
|
|
_writer.Indented($"{dataPointer} =l add {arrayPointer}, 8");
|
|
_writer.Indented($"call $nub_memset(l {dataPointer}, w 0, l {capacityInBytes})");
|
|
|
|
return arrayPointer;
|
|
}
|
|
|
|
private string EmitDereference(DereferenceNode dereference)
|
|
{
|
|
return EmitLoad(dereference.Type, EmitUnwrap(EmitExpression(dereference.Expression)));
|
|
}
|
|
|
|
private string EmitAddressOf(AddressOfNode addressOf)
|
|
{
|
|
var value = EmitExpression(addressOf.Expression);
|
|
if (!value.IsLValue)
|
|
{
|
|
throw new UnreachableException("Tried to take address of rvalue. This should have been caught in the type checker");
|
|
}
|
|
|
|
return value.Name;
|
|
}
|
|
|
|
private string EmitBinaryExpression(BinaryExpressionNode binaryExpression)
|
|
{
|
|
var left = EmitUnwrap(EmitExpression(binaryExpression.Left));
|
|
var right = EmitUnwrap(EmitExpression(binaryExpression.Right));
|
|
|
|
var outputName = TmpName();
|
|
|
|
var instruction = EmitBinaryInstructionFor(binaryExpression.Operator, binaryExpression.Left.Type, left, right);
|
|
|
|
_writer.Indented($"{outputName} {QBEAssign(binaryExpression.Left.Type)} {instruction} {left}, {right}");
|
|
return outputName;
|
|
}
|
|
|
|
private string EmitBinaryInstructionFor(BinaryOperator op, TypeNode type, string left, string right)
|
|
{
|
|
if (op is
|
|
BinaryOperator.Equal or
|
|
BinaryOperator.NotEqual or
|
|
BinaryOperator.GreaterThan or
|
|
BinaryOperator.GreaterThanOrEqual or
|
|
BinaryOperator.LessThan or
|
|
BinaryOperator.LessThanOrEqual)
|
|
{
|
|
char suffix;
|
|
|
|
if (!type.IsSimpleType(out var simpleType, out _))
|
|
{
|
|
throw new NotSupportedException("Binary operations is only supported for simple types.");
|
|
}
|
|
|
|
switch (simpleType.StorageSize)
|
|
{
|
|
case StorageSize.I8:
|
|
_writer.Indented($"{left} =w extsb {left}");
|
|
_writer.Indented($"{right} =w extsb {right}");
|
|
suffix = 'w';
|
|
break;
|
|
case StorageSize.U8:
|
|
_writer.Indented($"{left} =w extub {left}");
|
|
_writer.Indented($"{right} =w extub {right}");
|
|
suffix = 'w';
|
|
break;
|
|
case StorageSize.I16:
|
|
_writer.Indented($"{left} =w extsh {left}");
|
|
_writer.Indented($"{right} =w extsh {right}");
|
|
suffix = 'w';
|
|
break;
|
|
case StorageSize.U16:
|
|
_writer.Indented($"{left} =w extuh {left}");
|
|
_writer.Indented($"{right} =w extuh {right}");
|
|
suffix = 'w';
|
|
break;
|
|
case StorageSize.I32 or StorageSize.U32:
|
|
suffix = 'w';
|
|
break;
|
|
case StorageSize.I64 or StorageSize.U64:
|
|
suffix = 'l';
|
|
break;
|
|
default:
|
|
throw new NotSupportedException($"Unsupported type '{simpleType}' for binary operator '{op}'");
|
|
}
|
|
|
|
if (op is BinaryOperator.Equal)
|
|
{
|
|
return "ceq" + suffix;
|
|
}
|
|
|
|
if (op is BinaryOperator.NotEqual)
|
|
{
|
|
return "cne" + suffix;
|
|
}
|
|
|
|
string sign;
|
|
|
|
if (simpleType is IntTypeNode { Signed: true })
|
|
{
|
|
sign = "s";
|
|
}
|
|
else if (simpleType is IntTypeNode { Signed: false })
|
|
{
|
|
sign = "u";
|
|
}
|
|
else
|
|
{
|
|
throw new NotSupportedException($"Unsupported type '{type}' for binary operator '{op}'");
|
|
}
|
|
|
|
return op switch
|
|
{
|
|
BinaryOperator.GreaterThan => 'c' + sign + "gt" + suffix,
|
|
BinaryOperator.GreaterThanOrEqual => 'c' + sign + "ge" + suffix,
|
|
BinaryOperator.LessThan => 'c' + sign + "lt" + suffix,
|
|
BinaryOperator.LessThanOrEqual => 'c' + sign + "le" + suffix,
|
|
_ => throw new ArgumentOutOfRangeException(nameof(op), op, null)
|
|
};
|
|
}
|
|
|
|
return op switch
|
|
{
|
|
BinaryOperator.Plus => "add",
|
|
BinaryOperator.Minus => "sub",
|
|
BinaryOperator.Multiply => "mul",
|
|
BinaryOperator.Divide => "div",
|
|
_ => throw new ArgumentOutOfRangeException(nameof(op))
|
|
};
|
|
}
|
|
|
|
private string EmitExternFuncIdent(ExternFuncIdentNode externFuncIdent)
|
|
{
|
|
var func = _definitionTable.LookupExternFunc(externFuncIdent.Name);
|
|
return ExternFuncName(func);
|
|
}
|
|
|
|
private string EmitLocalFuncIdent(LocalFuncIdentNode localFuncIdent)
|
|
{
|
|
var func = _definitionTable.LookupLocalFunc(localFuncIdent.Name);
|
|
return LocalFuncName(func);
|
|
}
|
|
|
|
private string EmitVariableIdent(VariableIdentNode variableIdent)
|
|
{
|
|
return variableIdent.Name;
|
|
}
|
|
|
|
private string EmitLiteral(LiteralNode literal)
|
|
{
|
|
switch (literal.Kind)
|
|
{
|
|
case LiteralKind.Integer:
|
|
{
|
|
if (literal.Type is FloatTypeNode { Width: 32 })
|
|
{
|
|
var value = float.Parse(literal.Value, CultureInfo.InvariantCulture);
|
|
var bits = BitConverter.SingleToInt32Bits(value);
|
|
return bits.ToString();
|
|
}
|
|
|
|
if (literal.Type is FloatTypeNode { Width: 64 })
|
|
{
|
|
var value = double.Parse(literal.Value, CultureInfo.InvariantCulture);
|
|
var bits = BitConverter.DoubleToInt64Bits(value);
|
|
return bits.ToString();
|
|
}
|
|
|
|
if (literal.Type is IntTypeNode)
|
|
{
|
|
return literal.Value;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case LiteralKind.Float:
|
|
{
|
|
if (literal.Type is IntTypeNode)
|
|
{
|
|
return literal.Value.Split(".").First();
|
|
}
|
|
|
|
if (literal.Type is FloatTypeNode { Width: 32 })
|
|
{
|
|
var value = float.Parse(literal.Value, CultureInfo.InvariantCulture);
|
|
var bits = BitConverter.SingleToInt32Bits(value);
|
|
return bits.ToString();
|
|
}
|
|
|
|
if (literal.Type is FloatTypeNode { Width: 64 })
|
|
{
|
|
var value = double.Parse(literal.Value, CultureInfo.InvariantCulture);
|
|
var bits = BitConverter.DoubleToInt64Bits(value);
|
|
return bits.ToString();
|
|
}
|
|
|
|
break;
|
|
}
|
|
case LiteralKind.String:
|
|
{
|
|
if (literal.Type is StringTypeNode)
|
|
{
|
|
var stringLiteral = new StringLiteral(literal.Value, StringName());
|
|
_stringLiterals.Add(stringLiteral);
|
|
return stringLiteral.Name;
|
|
}
|
|
|
|
if (literal.Type is CStringTypeNode)
|
|
{
|
|
var cStringLiteral = new CStringLiteral(literal.Value, CStringName());
|
|
_cStringLiterals.Add(cStringLiteral);
|
|
return cStringLiteral.Name;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case LiteralKind.Bool:
|
|
{
|
|
if (literal.Type is BoolTypeNode)
|
|
{
|
|
return bool.Parse(literal.Value) ? "1" : "0";
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
throw new NotSupportedException($"Cannot create literal of kind '{literal.Kind}' for type {literal.Type}");
|
|
}
|
|
|
|
private string EmitStructInitializer(StructInitializerNode structInitializer, string? destination = null)
|
|
{
|
|
var structDef = _definitionTable.LookupStruct(structInitializer.StructType.Name);
|
|
|
|
if (destination == null)
|
|
{
|
|
destination = TmpName();
|
|
var size = SizeOf(structInitializer.StructType);
|
|
_writer.Indented($"{destination} =l alloc8 {size}");
|
|
}
|
|
|
|
foreach (var field in structDef.Fields)
|
|
{
|
|
if (!structInitializer.Initializers.TryGetValue(field.Name, out var valueExpression))
|
|
{
|
|
valueExpression = field.Value.Value;
|
|
}
|
|
|
|
if (valueExpression == null)
|
|
{
|
|
throw new UnreachableException("Value of field in uninitialized. This should have been caught in the type checker");
|
|
}
|
|
|
|
var offset = TmpName();
|
|
_writer.Indented($"{offset} =l add {destination}, {OffsetOf(structDef, field.Name)}");
|
|
EmitCopyIntoOrInitialize(valueExpression, offset);
|
|
}
|
|
|
|
return destination;
|
|
}
|
|
|
|
private string EmitUnaryExpression(UnaryExpressionNode unaryExpression)
|
|
{
|
|
var operand = EmitUnwrap(EmitExpression(unaryExpression.Operand));
|
|
var outputName = TmpName();
|
|
|
|
switch (unaryExpression.Operator)
|
|
{
|
|
case UnaryOperator.Negate:
|
|
{
|
|
switch (unaryExpression.Operand.Type)
|
|
{
|
|
case IntTypeNode { Signed: true, Width: 64 }:
|
|
_writer.Indented($"{outputName} =l neg {operand}");
|
|
return outputName;
|
|
case IntTypeNode { Signed: true, Width: 8 or 16 or 32 }:
|
|
_writer.Indented($"{outputName} =w neg {operand}");
|
|
return outputName;
|
|
case FloatTypeNode { Width: 64 }:
|
|
_writer.Indented($"{outputName} =d neg {operand}");
|
|
return outputName;
|
|
case FloatTypeNode { Width: 32 }:
|
|
_writer.Indented($"{outputName} =s neg {operand}");
|
|
return outputName;
|
|
}
|
|
|
|
break;
|
|
}
|
|
case UnaryOperator.Invert:
|
|
{
|
|
switch (unaryExpression.Operand.Type)
|
|
{
|
|
case BoolTypeNode:
|
|
_writer.Indented($"{outputName} =w xor {operand}, 1");
|
|
return outputName;
|
|
}
|
|
|
|
break;
|
|
}
|
|
default:
|
|
{
|
|
throw new ArgumentOutOfRangeException();
|
|
}
|
|
}
|
|
|
|
throw new NotSupportedException($"Unary operator {unaryExpression.Operator} for type {unaryExpression.Operand.Type} not supported");
|
|
}
|
|
|
|
private string EmitStructFieldAccess(StructFieldAccessNode structFieldAccess)
|
|
{
|
|
var target = EmitUnwrap(EmitExpression(structFieldAccess.Target));
|
|
|
|
var structDef = _definitionTable.LookupStruct(structFieldAccess.StructType.Name);
|
|
var offset = OffsetOf(structDef, structFieldAccess.Field);
|
|
|
|
var output = TmpName();
|
|
_writer.Indented($"{output} =l add {target}, {offset}");
|
|
|
|
return output;
|
|
}
|
|
|
|
private string EmitStructFuncCall(StructFuncCallNode structFuncCall)
|
|
{
|
|
var structDef = _definitionTable.LookupStruct(structFuncCall.StructType.Name);
|
|
var func = StructFuncName(structDef.Name, structFuncCall.Name);
|
|
|
|
var thisParameter = EmitUnwrap(EmitExpression(structFuncCall.StructExpression));
|
|
|
|
List<string> parameterStrings = [$"l {thisParameter}"];
|
|
|
|
foreach (var parameter in structFuncCall.Parameters)
|
|
{
|
|
var copy = EmitCreateCopyOrInitialize(parameter);
|
|
parameterStrings.Add($"{FuncQBETypeName(parameter.Type)} {copy}");
|
|
}
|
|
|
|
if (structFuncCall.Type is VoidTypeNode)
|
|
{
|
|
_writer.Indented($"call {func}({string.Join(", ", parameterStrings)})");
|
|
return string.Empty;
|
|
}
|
|
else
|
|
{
|
|
var outputName = TmpName();
|
|
_writer.Indented($"{outputName} {QBEAssign(structFuncCall.Type)} call {func}({string.Join(", ", parameterStrings)})");
|
|
return outputName;
|
|
}
|
|
}
|
|
|
|
private string EmitInterfaceFuncCall(InterfaceFuncCallNode interfaceFuncCall)
|
|
{
|
|
var target = EmitUnwrap(EmitExpression(interfaceFuncCall.InterfaceExpression));
|
|
|
|
var interfaceDef = _definitionTable.LookupInterface(interfaceFuncCall.InterfaceType.Name);
|
|
var functionIndex = interfaceDef.Functions.ToList().FindIndex(x => x.Name == interfaceFuncCall.Name);
|
|
var offset = functionIndex * 8;
|
|
|
|
var vtable = TmpName();
|
|
_writer.Indented($"{vtable} =l loadl {target}");
|
|
|
|
var funcOffset = TmpName();
|
|
_writer.Indented($"{funcOffset} =l add {vtable}, {offset}");
|
|
|
|
var func = TmpName();
|
|
_writer.Indented($"{func} =l loadl {funcOffset}");
|
|
|
|
_writer.Indented($"{target} =l add {target}, 8");
|
|
_writer.Indented($"{target} =l loadl {target}");
|
|
|
|
List<string> parameterStrings = [$"l {target}"];
|
|
|
|
foreach (var parameter in interfaceFuncCall.Parameters)
|
|
{
|
|
var copy = EmitCreateCopyOrInitialize(parameter);
|
|
parameterStrings.Add($"{FuncQBETypeName(parameter.Type)} {copy}");
|
|
}
|
|
|
|
if (interfaceFuncCall.Type is VoidTypeNode)
|
|
{
|
|
_writer.Indented($"call {func}({string.Join(", ", parameterStrings)})");
|
|
return string.Empty;
|
|
}
|
|
else
|
|
{
|
|
var outputName = TmpName();
|
|
_writer.Indented($"{outputName} {QBEAssign(interfaceFuncCall.Type)} call {func}({string.Join(", ", parameterStrings)})");
|
|
return outputName;
|
|
}
|
|
}
|
|
|
|
private string EmitInterfaceInitializer(InterfaceInitializerNode interfaceInitializer, string? destination = null)
|
|
{
|
|
var implementation = EmitUnwrap(EmitExpression(interfaceInitializer.Implementation));
|
|
|
|
var vtableOffset = 0;
|
|
foreach (var interfaceImplementation in interfaceInitializer.StructType.InterfaceImplementations)
|
|
{
|
|
if (interfaceImplementation == interfaceInitializer.InterfaceType)
|
|
{
|
|
break;
|
|
}
|
|
|
|
vtableOffset += interfaceImplementation.Functions.Count * 8;
|
|
}
|
|
|
|
if (destination == null)
|
|
{
|
|
destination = TmpName();
|
|
_writer.Indented($"{destination} =l alloc8 {SizeOf(interfaceInitializer.InterfaceType)}");
|
|
}
|
|
|
|
var interfaceVtablePointer = TmpName();
|
|
_writer.Indented($"{interfaceVtablePointer} =l add {StructVtableName(interfaceInitializer.StructType.Name)}, {vtableOffset}");
|
|
_writer.Indented($"storel {interfaceVtablePointer}, {destination}");
|
|
|
|
var objectPointer = TmpName();
|
|
_writer.Indented($"{objectPointer} =l add {destination}, 8");
|
|
_writer.Indented($"storel {implementation}, {objectPointer}");
|
|
|
|
return destination;
|
|
}
|
|
|
|
private string EmitFuncCall(FuncCallNode funcCall)
|
|
{
|
|
var expression = EmitExpression(funcCall.Expression);
|
|
|
|
var parameterStrings = new List<string>();
|
|
|
|
foreach (var parameter in funcCall.Parameters)
|
|
{
|
|
var copy = EmitCreateCopyOrInitialize(parameter);
|
|
parameterStrings.Add($"{FuncQBETypeName(parameter.Type)} {copy}");
|
|
}
|
|
|
|
var funcPointer = EmitUnwrap(expression);
|
|
if (funcCall.Type is VoidTypeNode)
|
|
{
|
|
_writer.Indented($"call {funcPointer}({string.Join(", ", parameterStrings)})");
|
|
return string.Empty;
|
|
}
|
|
else
|
|
{
|
|
var outputName = TmpName();
|
|
_writer.Indented($"{outputName} {QBEAssign(funcCall.Type)} call {funcPointer}({string.Join(", ", parameterStrings)})");
|
|
return outputName;
|
|
}
|
|
}
|
|
|
|
private string EmitUnwrap(Val val)
|
|
{
|
|
return val.IsLValue ? EmitLoad(val.Type, val.Name) : val.Name;
|
|
}
|
|
|
|
private static int SizeOf(TypeNode type)
|
|
{
|
|
return type switch
|
|
{
|
|
SimpleTypeNode simple => simple.StorageSize switch
|
|
{
|
|
StorageSize.Void => 0,
|
|
StorageSize.I8 or StorageSize.U8 => 1,
|
|
StorageSize.I16 or StorageSize.U16 => 2,
|
|
StorageSize.I32 or StorageSize.U32 or StorageSize.F32 => 4,
|
|
StorageSize.I64 or StorageSize.U64 or StorageSize.F64 => 8,
|
|
_ => throw new ArgumentOutOfRangeException(nameof(type), $"Unknown storage size: {simple.StorageSize}")
|
|
},
|
|
CStringTypeNode => 8,
|
|
StringTypeNode => 8,
|
|
ArrayTypeNode => 8,
|
|
StructTypeNode structType => CalculateStructSize(structType),
|
|
InterfaceTypeNode => 16,
|
|
_ => throw new ArgumentOutOfRangeException(nameof(type), $"Unknown type: {type.GetType()}")
|
|
};
|
|
}
|
|
|
|
private static int CalculateStructSize(StructTypeNode structType)
|
|
{
|
|
var offset = 0;
|
|
|
|
foreach (var field in structType.Fields)
|
|
{
|
|
var fieldAlignment = AlignmentOf(field);
|
|
offset = AlignTo(offset, fieldAlignment);
|
|
offset += SizeOf(field);
|
|
}
|
|
|
|
var structAlignment = CalculateStructAlignment(structType);
|
|
return AlignTo(offset, structAlignment);
|
|
}
|
|
|
|
private static int AlignmentOf(TypeNode type)
|
|
{
|
|
return type switch
|
|
{
|
|
SimpleTypeNode simple => simple.StorageSize switch
|
|
{
|
|
StorageSize.Void => 1,
|
|
StorageSize.I8 or StorageSize.U8 => 1,
|
|
StorageSize.I16 or StorageSize.U16 => 2,
|
|
StorageSize.I32 or StorageSize.U32 or StorageSize.F32 => 4,
|
|
StorageSize.I64 or StorageSize.U64 or StorageSize.F64 => 8,
|
|
_ => throw new ArgumentOutOfRangeException(nameof(type), $"Unknown storage size: {simple.StorageSize}")
|
|
},
|
|
CStringTypeNode => 8,
|
|
StringTypeNode => 8,
|
|
ArrayTypeNode => 8,
|
|
StructTypeNode structType => CalculateStructAlignment(structType),
|
|
InterfaceTypeNode => 8,
|
|
_ => throw new ArgumentOutOfRangeException(nameof(type), $"Unknown type: {type.GetType()}")
|
|
};
|
|
}
|
|
|
|
private static int CalculateStructAlignment(StructTypeNode structType)
|
|
{
|
|
var maxAlignment = 1;
|
|
|
|
if (structType.InterfaceImplementations.Any())
|
|
{
|
|
maxAlignment = Math.Max(maxAlignment, 8);
|
|
}
|
|
|
|
foreach (var field in structType.Fields)
|
|
{
|
|
var fieldAlignment = AlignmentOf(field);
|
|
maxAlignment = Math.Max(maxAlignment, fieldAlignment);
|
|
}
|
|
|
|
return maxAlignment;
|
|
}
|
|
|
|
private static int AlignTo(int offset, int alignment)
|
|
{
|
|
return (offset + alignment - 1) & ~(alignment - 1);
|
|
}
|
|
|
|
private static int OffsetOf(StructNode structDef, string member)
|
|
{
|
|
var offset = 0;
|
|
|
|
foreach (var field in structDef.Fields)
|
|
{
|
|
if (field.Name == member)
|
|
{
|
|
return offset;
|
|
}
|
|
|
|
var fieldAlignment = AlignmentOf(field.Type);
|
|
|
|
offset = AlignTo(offset, fieldAlignment);
|
|
offset += SizeOf(field.Type);
|
|
}
|
|
|
|
throw new UnreachableException($"Member '{member}' not found in struct");
|
|
}
|
|
|
|
#region Naming utilities
|
|
|
|
private string TmpName()
|
|
{
|
|
return $"%t{++_tmpIndex}";
|
|
}
|
|
|
|
private string LabelName()
|
|
{
|
|
return $"@l{++_labelIndex}";
|
|
}
|
|
|
|
private string CStringName()
|
|
{
|
|
return $"$cstring{++_cStringLiteralIndex}";
|
|
}
|
|
|
|
private string StringName()
|
|
{
|
|
return $"$string{++_stringLiteralIndex}";
|
|
}
|
|
|
|
private string LocalFuncName(LocalFuncNode funcDef)
|
|
{
|
|
return $"${funcDef.Name}";
|
|
}
|
|
|
|
private string ExternFuncName(ExternFuncNode funcDef)
|
|
{
|
|
return $"${funcDef.CallName}";
|
|
}
|
|
|
|
private string StructTypeName(string name)
|
|
{
|
|
return $":{name}";
|
|
}
|
|
|
|
private string StructFuncName(string structName, string funcName)
|
|
{
|
|
return $"${structName}_{funcName}";
|
|
}
|
|
|
|
private string StructVtableName(string structName)
|
|
{
|
|
return $"${structName}_vtable";
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
|
|
public class StringLiteral(string value, string name)
|
|
{
|
|
public string Value { get; } = value;
|
|
public string Name { get; } = name;
|
|
}
|
|
|
|
public class CStringLiteral(string value, string name)
|
|
{
|
|
public string Value { get; } = value;
|
|
public string Name { get; } = name;
|
|
}
|
|
|
|
public record Val(string Name, TypeNode Type, bool IsLValue);
|
|
|
|
public class Scope(Scope? parent = null)
|
|
{
|
|
private readonly Dictionary<string, Val> _variables = [];
|
|
|
|
public Val Lookup(string name)
|
|
{
|
|
var variable = _variables.GetValueOrDefault(name);
|
|
if (variable != null)
|
|
{
|
|
return variable;
|
|
}
|
|
|
|
return parent?.Lookup(name) ?? throw new UnreachableException($"Variable '{name}' not found");
|
|
}
|
|
|
|
public void Declare(string name, Val value)
|
|
{
|
|
_variables.Add(name, value);
|
|
}
|
|
|
|
public Scope SubScope()
|
|
{
|
|
return new Scope(this);
|
|
}
|
|
} |