...

compiler/NubLang/Generation/LlvmGenerator.cs

@@ -22,16 +22,26 @@ public class LlvmGenerator
         var writer = new IndentedTextWriter();
 
         _module = topLevelNodes.OfType<ModuleNode>().First().NameToken.Value;
-        writer.WriteLine($"; Module {_module}");
-        writer.WriteLine();
 
-        writer.WriteLine("declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)");
-        writer.WriteLine();
+        writer.WriteLine($$"""
+                           ; Module {{_module}}
+
+                           target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
+                           target triple = "x86_64-pc-linux-gnu"
+
+                           %nub.slice = type { i64, ptr }
+                           %nub.string = type { i64, ptr }
+
+                           declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)
+
+                           """);
 
         var declaredExternFunctions = new HashSet<string>();
 
+        writer.WriteLine("; == Function declarations ==");
         foreach (var module in repository.GetAll())
         {
+            writer.WriteLine($"; ==== {module.Name} ====");
             foreach (var prototype in module.FunctionPrototypes)
             {
                 // note(nub31): If we are in the current module and the function has a body, we skip it to prevent duplicate definition
@@ -45,22 +55,31 @@ public class LlvmGenerator
                     continue;
                 }
 
-                var parameters = prototype.Parameters.Select(x => $"{MapType(x.Type)} %{x.NameToken.Value}");
-                var funcName = FuncName(module.Name, prototype.NameToken.Value, prototype.ExternSymbolToken?.Value);
-                writer.WriteLine($"declare {MapType(prototype.ReturnType)} @{funcName}({string.Join(", ", parameters)})");
-                writer.WriteLine();
+                writer.WriteLine($"declare {CreateFunctionPrototype(prototype, module.Name)}");
             }
         }
 
+        writer.WriteLine();
+
+        writer.WriteLine("; == Struct declarations ==");
+        foreach (var module in repository.GetAll())
+        {
+            writer.WriteLine($"; ==== {module.Name} ====");
+            foreach (var structType in module.StructTypes)
+            {
+                var fieldTypes = structType.Fields.Select(x => MapType(x.Type));
+                writer.WriteLine($"%{StructName(structType.Module, structType.Name)} = type {{ {string.Join(", ", fieldTypes)} }}");
+            }
+        }
+
+        writer.WriteLine();
+
         foreach (var structNode in topLevelNodes.OfType<StructNode>())
         {
-            var types = structNode.Fields.Select(x => MapType(x.Type));
-            writer.WriteLine($"%{StructName(structNode)} = type {{ {string.Join(", ", types)} }}");
-            writer.WriteLine();
-
             _tmpIndex = 0;
             _labelIndex = 0;
 
+            writer.WriteLine("; == Struct constructors ==");
             writer.WriteLine($"define void @{StructName(structNode)}.new(ptr %self) {{");
             using (writer.Indent())
             {
@@ -83,6 +102,7 @@ public class LlvmGenerator
             writer.WriteLine();
         }
 
+        writer.WriteLine("; == Function definitions ==");
         foreach (var funcNode in topLevelNodes.OfType<FuncNode>())
         {
             if (funcNode.Body == null) continue;
@@ -90,8 +110,7 @@ public class LlvmGenerator
             _tmpIndex = 0;
             _labelIndex = 0;
 
-            var parameters = funcNode.Prototype.Parameters.Select(x => $"{MapType(x.Type)} %{x.NameToken.Value}");
-            writer.WriteLine($"define {MapType(funcNode.Prototype.ReturnType)} @{FuncName(_module, funcNode.Prototype.NameToken.Value, funcNode.Prototype.ExternSymbolToken?.Value)}({string.Join(", ", parameters)}) {{");
+            writer.WriteLine($"define {CreateFunctionPrototype(funcNode.Prototype, _module)} {{");
 
             using (writer.Indent())
             {
@@ -108,6 +127,7 @@ public class LlvmGenerator
             writer.WriteLine();
         }
 
+        writer.WriteLine("; == String literals ==");
         foreach (var stringLiteral in _stringLiterals)
         {
             writer.WriteLine($"{stringLiteral.Name} = private unnamed_addr constant [{stringLiteral.Size} x i8] c\"{stringLiteral.Text}\\00\", align 1");
@@ -116,6 +136,46 @@ public class LlvmGenerator
         return writer.ToString();
     }
 
+    private string CreateFunctionPrototype(FuncPrototypeNode prototypeNode, string module)
+    {
+        var parameterStrings = new List<string>();
+
+        foreach (var parameter in prototypeNode.Parameters)
+        {
+            var llvmType = MapType(parameter.Type);
+            var name = parameter.NameToken.Value;
+
+            if (parameter.Type is NubStructType)
+            {
+                var alignment = parameter.Type.GetAlignment();
+                parameterStrings.Add($"{llvmType}* byval({llvmType}) align {alignment} %{name}");
+            }
+            else
+            {
+                parameterStrings.Add($"{llvmType} %{name}");
+            }
+        }
+
+        var funcName = FuncName(module, prototypeNode.NameToken.Value, prototypeNode.ExternSymbolToken?.Value);
+        var returnType = MapType(prototypeNode.ReturnType);
+
+        if (prototypeNode.ReturnType is NubStructType)
+        {
+            var alignment = prototypeNode.ReturnType.GetAlignment();
+            var parameters = "";
+            if (parameterStrings.Count != 0)
+            {
+                parameters = ", " + string.Join(", ", parameterStrings);
+            }
+
+            return $"ccc void @{funcName}({returnType}* sret({returnType}) align {alignment}{parameters})";
+        }
+        else
+        {
+            return $"ccc {returnType} @{funcName}({string.Join(", ", parameterStrings)})";
+        }
+    }
+
     private void EmitStatement(IndentedTextWriter writer, StatementNode statementNode)
     {
         switch (statementNode)
@@ -860,11 +920,11 @@ public class LlvmGenerator
 
         if (funcCallNode.Type is NubVoidType)
         {
-            writer.WriteLine($"call {MapType(funcCallNode.Type)} {functionPtr}({string.Join(", ", parameterStrings)})");
+            writer.WriteLine($"call ccc {MapType(funcCallNode.Type)} {functionPtr}({string.Join(", ", parameterStrings)})");
         }
         else
         {
-            writer.WriteLine($"{result} = call {MapType(funcCallNode.Type)} {functionPtr}({string.Join(", ", parameterStrings)})");
+            writer.WriteLine($"{result} = call ccc {MapType(funcCallNode.Type)} {functionPtr}({string.Join(", ", parameterStrings)})");
         }
 
         return new Tmp(result, funcCallNode.Type, false);

examples/playgroud/main.nub

@@ -15,7 +15,7 @@ extern "main" func main(argc: i64, argv: [?]^i8)
     puts(x)
 }
 
-func test(arr: [?]i64)
+func test(test: Test): Test
 {
-
+    return test
 }