feat: implement .loc, .file and .func debug directives

src/main/wacc/backend/assemblyIR.scala

@@ -199,10 +199,15 @@ object assemblyIR {
   }
 
   enum Directive extends AsmLine {
-    case IntelSyntax, RoData, Text
+    case IntelSyntax, RoData, Text, EndFunc
     case Global(name: String)
     case Int(value: scala.Int)
     case Asciz(string: String)
+    case File(no: scala.Int, file: String)
+    case Location(fileNo: scala.Int, lineNo: scala.Int, colNo: Option[scala.Int])
+    case Func(name: String, label: LabelDef)
+    case Type(label: LabelDef, symbolType: SymbolType)
+    case Size(label: LabelDef, expr: SizeExpr)
 
     override def toString(): String = this match {
       case IntelSyntax   => ".intel_syntax noprefix"
@@ -211,6 +216,32 @@ object assemblyIR {
       case RoData        => ".section .rodata"
       case Int(value)    => s"\t.int $value"
       case Asciz(string) => s"\t.asciz \"$string\""
+      case File(no, file) => s".file $no \"${file}\""
+      case Location(fileNo, lineNo, colNo) =>
+        s"\t.loc $fileNo $lineNo" + colNo.map(c => s" $c").getOrElse("")
+      case Func(name, label) =>
+        s".func $name, ${label.name}"
+      case EndFunc => ".endfunc"
+      case Type(label, symbolType) =>
+        s".type ${label.name}, @${symbolType.toString}"
+      case Directive.Size(label, expr) =>
+        s".size ${label.name}, ${expr.toString}"
+    }
+  }
+
+  enum SymbolType {
+    case Function
+
+    override def toString(): String = this match {
+      case Function => "function"
+    }
+  }
+
+  enum SizeExpr {
+    case Relative(label: LabelDef)
+
+    override def toString(): String = this match {
+      case Relative(label) => s".-${label.name}"
     }
   }