Added break and continue statements

CHANGELOG.md

@@ -20,6 +20,8 @@
 
 * Added return dispatch statements.
 
+* Added `break` and `continue` statements.
+
 * Added octal and quaternary literals.
 
 * Fixed several optimization bugs.

src/main/scala/millfork/OptimizationPresets.scala

@@ -14,6 +14,7 @@ object OptimizationPresets {
     UnusedGlobalVariables,
   )
   val AssOpt: List[AssemblyOptimization] = List[AssemblyOptimization](
+    UnusedLabelRemoval,
     AlwaysGoodOptimizations.NonetAddition,
     AlwaysGoodOptimizations.PointlessSignCheck,
     AlwaysGoodOptimizations.PoinlessLoadBeforeAnotherLoad,
@@ -125,6 +126,7 @@ object OptimizationPresets {
   )
 
   val Good: List[AssemblyOptimization] = List[AssemblyOptimization](
+    UnusedLabelRemoval,
     AlwaysGoodOptimizations.Adc0Optimization,
     AlwaysGoodOptimizations.BitPackingUnpacking,
     AlwaysGoodOptimizations.BranchInPlaceRemoval,
@@ -185,6 +187,7 @@ object OptimizationPresets {
   )
 
   val QuickPreset: List[AssemblyOptimization] = List[AssemblyOptimization](
+    UnusedLabelRemoval,
     AlwaysGoodOptimizations.Adc0Optimization,
     AlwaysGoodOptimizations.BranchInPlaceRemoval,
     AlwaysGoodOptimizations.CommonBranchBodyOptimization,

src/main/scala/millfork/compiler/CompilationContext.scala

@@ -1,18 +1,32 @@
 package millfork.compiler
 
 import millfork.{CompilationFlag, CompilationOptions}
-import millfork.env.{Environment, MangledFunction, NormalFunction}
+import millfork.env.{Environment, Label, NormalFunction}
 
 /**
   * @author Karol Stasiak
   */
-case class CompilationContext(env: Environment, function: NormalFunction, extraStackOffset: Int, options: CompilationOptions){
+case class CompilationContext(env: Environment,
+                              function: NormalFunction,
+                              extraStackOffset: Int,
+                              options: CompilationOptions,
+                              breakLabels: Map[String, Label] = Map(),
+                              continueLabels: Map[String, Label] = Map()){
   def withInlinedEnv(environment: Environment): CompilationContext = {
     val newEnv = new Environment(Some(env), MfCompiler.nextLabel("en"))
     newEnv.things ++= environment.things
     copy(env = newEnv)
   }
 
+  def addLabels(names: Set[String], breakLabel: Label, continueLabel: Label): CompilationContext = {
+    var b = breakLabels
+    var c = continueLabels
+    names.foreach{name =>
+      b += (name -> breakLabel)
+      c += (name -> continueLabel)
+    }
+    this.copy(breakLabels = b, continueLabels = c)
+  }
 
   def addStack(i: Int): CompilationContext = this.copy(extraStackOffset = extraStackOffset + i)
 

src/main/scala/millfork/compiler/MacroExpander.scala

@@ -29,13 +29,15 @@ object MacroExpander {
       case ReturnDispatchStatement(i,ps, bs) => ReturnDispatchStatement(i.replaceVariable(paramName, target), ps.map(fx), bs.map{
         case ReturnDispatchBranch(l, fu, pps) => ReturnDispatchBranch(l, f(fu), pps.map(f))
       })
-      case WhileStatement(c, b) => WhileStatement(f(c), b.map(gx))
-      case DoWhileStatement(b, c) => DoWhileStatement(b.map(gx), f(c))
+      case WhileStatement(c, b, i, n) => WhileStatement(f(c), b.map(gx), i.map(gx), n)
+      case DoWhileStatement(b, i, c, n) => DoWhileStatement(b.map(gx), i.map(gx), f(c), n)
       case ForStatement(v, start, end, dir, body) => ForStatement(h(v), f(start), f(end), dir, body.map(gx))
       case IfStatement(c, t, e) => IfStatement(f(c), t.map(gx), e.map(gx))
       case s:AssemblyStatement => s.copy(expression =  f(s.expression))
       case Assignment(d,s) => Assignment(fx(d), f(s))
       case BlockStatement(s) => BlockStatement(s.map(gx))
+      case BreakStatement(s) => if (s == paramName) BreakStatement(target.toString) else stmt
+      case ContinueStatement(s) => if (s == paramName) ContinueStatement(target.toString) else stmt
       case _ =>
         println(stmt)
         ???

src/main/scala/millfork/compiler/StatementCompiler.scala

@@ -111,6 +111,11 @@ object StatementCompiler {
             ExpressionCompiler.compile(ctx, e, None, NoBranching)
         }
       case ExpressionStatement(e) =>
+        e match {
+          case VariableExpression(_) | LiteralExpression(_, _) =>
+            ErrorReporting.warn("Pointless expression statement", ctx.options, statement.position)
+          case _ =>
+        }
         ExpressionCompiler.compile(ctx, e, None, NoBranching)
       case BlockStatement(s) =>
         s.flatMap(compile(ctx, _))
@@ -227,74 +232,67 @@ object StatementCompiler {
             ErrorReporting.error(s"Illegal type for a condition: `$condType`", condition.position)
             Nil
         }
-      case WhileStatement(condition, bodyPart) =>
+      case WhileStatement(condition, bodyPart, incrementPart, labels) =>
+        val start = MfCompiler.nextLabel("wh")
+        val middle = MfCompiler.nextLabel("he")
+        val inc = MfCompiler.nextLabel("fp")
+        val end = MfCompiler.nextLabel("ew")
         val condType = ExpressionCompiler.getExpressionType(ctx, condition)
-        val bodyBlock = compile(ctx, bodyPart)
+        val bodyBlock = compile(ctx.addLabels(labels, Label(end), Label(inc)), bodyPart)
+        val incrementBlock = compile(ctx.addLabels(labels, Label(end), Label(inc)), incrementPart)
         val largeBodyBlock = bodyBlock.map(_.sizeInBytes).sum > 100
         condType match {
           case ConstantBooleanType(_, true) =>
-            val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, NoBranching)
-            val start = MfCompiler.nextLabel("wh")
-            List(labelChunk(start), bodyBlock, jmpChunk(start)).flatten
+            List(labelChunk(start), bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
           case ConstantBooleanType(_, false) => Nil
           case FlagBooleanType(_, jumpIfTrue, jumpIfFalse) =>
             if (largeBodyBlock) {
-              val start = MfCompiler.nextLabel("wh")
-              val middle = MfCompiler.nextLabel("he")
-              val end = MfCompiler.nextLabel("ew")
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, NoBranching)
-              List(labelChunk(start), conditionBlock, branchChunk(jumpIfTrue, middle), jmpChunk(end), bodyBlock, jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), conditionBlock, branchChunk(jumpIfTrue, middle), jmpChunk(end), labelChunk(middle), bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
             } else {
-              val start = MfCompiler.nextLabel("wh")
-              val end = MfCompiler.nextLabel("ew")
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, NoBranching)
-              List(labelChunk(start), conditionBlock, branchChunk(jumpIfFalse, end), bodyBlock, jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), conditionBlock, branchChunk(jumpIfFalse, end), bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
             }
           case BuiltInBooleanType =>
             if (largeBodyBlock) {
-              val start = MfCompiler.nextLabel("wh")
-              val middle = MfCompiler.nextLabel("he")
-              val end = MfCompiler.nextLabel("ew")
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, BranchIfTrue(middle))
-              List(labelChunk(start), conditionBlock, jmpChunk(end), labelChunk(middle), bodyBlock, jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), conditionBlock, jmpChunk(end), labelChunk(middle), bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
             } else {
-              val start = MfCompiler.nextLabel("wh")
-              val end = MfCompiler.nextLabel("ew")
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, BranchIfFalse(end))
-              List(labelChunk(start), conditionBlock, bodyBlock, jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), conditionBlock, bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
             }
           case _ =>
             ErrorReporting.error(s"Illegal type for a condition: `$condType`", condition.position)
             Nil
         }
-      case DoWhileStatement(bodyPart, condition) =>
+      case DoWhileStatement(bodyPart, incrementPart, condition, labels) =>
+        val start = MfCompiler.nextLabel("do")
+        val inc = MfCompiler.nextLabel("fp")
+        val end = MfCompiler.nextLabel("od")
         val condType = ExpressionCompiler.getExpressionType(ctx, condition)
-        val bodyBlock = compile(ctx, bodyPart)
+        val bodyBlock = compile(ctx.addLabels(labels, Label(end), Label(inc)), bodyPart)
+        val incrementBlock = compile(ctx.addLabels(labels, Label(end), Label(inc)), incrementPart)
         val largeBodyBlock = bodyBlock.map(_.sizeInBytes).sum > 100
         condType match {
           case ConstantBooleanType(_, true) =>
-            val start = MfCompiler.nextLabel("do")
             val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, NoBranching)
-            List(labelChunk(start), bodyBlock, jmpChunk(start)).flatten
-          case ConstantBooleanType(_, false) => bodyBlock
+            List(labelChunk(start),bodyBlock, labelChunk(inc), incrementBlock, jmpChunk(start), labelChunk(end)).flatten
+          case ConstantBooleanType(_, false) =>
+            List(bodyBlock, labelChunk(inc), incrementBlock, labelChunk(end)).flatten
           case FlagBooleanType(_, jumpIfTrue, jumpIfFalse) =>
-            val start = MfCompiler.nextLabel("do")
             val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, NoBranching)
             if (largeBodyBlock) {
-              val end = MfCompiler.nextLabel("od")
-              List(labelChunk(start), bodyBlock, conditionBlock, branchChunk(jumpIfFalse, end), jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), bodyBlock, labelChunk(inc), incrementBlock, conditionBlock, branchChunk(jumpIfFalse, end), jmpChunk(start), labelChunk(end)).flatten
             } else {
-              List(labelChunk(start), bodyBlock, conditionBlock, branchChunk(jumpIfTrue, start)).flatten
+              List(labelChunk(start), bodyBlock, labelChunk(inc), incrementBlock, conditionBlock, branchChunk(jumpIfTrue, start), labelChunk(end)).flatten
             }
           case BuiltInBooleanType =>
-            val start = MfCompiler.nextLabel("do")
             if (largeBodyBlock) {
-              val end = MfCompiler.nextLabel("od")
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, BranchIfFalse(end))
-              List(labelChunk(start), bodyBlock, conditionBlock, jmpChunk(start), labelChunk(end)).flatten
+              List(labelChunk(start), bodyBlock, labelChunk(inc), incrementBlock, conditionBlock, jmpChunk(start), labelChunk(end)).flatten
             } else {
               val conditionBlock = ExpressionCompiler.compile(ctx, condition, someRegisterA, BranchIfTrue(start))
-              List(labelChunk(start), bodyBlock, conditionBlock).flatten
+              List(labelChunk(start), bodyBlock, labelChunk(inc), incrementBlock, conditionBlock, labelChunk(end)).flatten
             }
           case _ =>
             ErrorReporting.error(s"Illegal type for a condition: `$condType`", condition.position)
@@ -307,32 +305,36 @@ object StatementCompiler {
         val one = LiteralExpression(1, 1)
         val increment = ExpressionStatement(FunctionCallExpression("+=", List(vex, one)))
         val decrement = ExpressionStatement(FunctionCallExpression("-=", List(vex, one)))
+        val names = Set("", "for", variable)
         (direction, env.eval(start), env.eval(end)) match {
 
           case (ForDirection.Until | ForDirection.ParallelUntil, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, _))) if s == e - 1 =>
-            compile(ctx, Assignment(vex, f.start) :: f.body)
+            val end = MfCompiler.nextLabel("of")
+            compile(ctx.addLabels(names, Label(end), Label(end)), Assignment(vex, f.start) :: f.body) ++ labelChunk(end)
           case (ForDirection.Until | ForDirection.ParallelUntil, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, _))) if s >= e =>
             Nil
 
           case (ForDirection.To | ForDirection.ParallelTo, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, _))) if s == e =>
-            compile(ctx, Assignment(vex, f.start) :: f.body)
+            val end = MfCompiler.nextLabel("of")
+            compile(ctx.addLabels(names, Label(end), Label(end)), Assignment(vex, f.start) :: f.body) ++ labelChunk(end)
           case (ForDirection.To | ForDirection.ParallelTo, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, _))) if s > e =>
             Nil
 
           case (ForDirection.ParallelUntil, Some(NumericConstant(0, ssize)), Some(NumericConstant(e, _))) if e > 0 =>
             compile(ctx, List(
               Assignment(vex, f.end),
-              DoWhileStatement(decrement :: f.body, FunctionCallExpression("!=", List(vex, f.start)))
+              DoWhileStatement(Nil, decrement :: f.body, FunctionCallExpression("!=", List(vex, f.start)), names)
             ))
 
           case (ForDirection.DownTo, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, esize))) if s == e =>
-            compile(ctx, Assignment(vex, LiteralExpression(s, ssize)) :: f.body)
+            val end = MfCompiler.nextLabel("of")
+            compile(ctx.addLabels(names, Label(end), Label(end)), Assignment(vex, LiteralExpression(s, ssize)) :: f.body) ++ labelChunk(end)
           case (ForDirection.DownTo, Some(NumericConstant(s, ssize)), Some(NumericConstant(e, esize))) if s < e =>
             Nil
           case (ForDirection.DownTo, Some(NumericConstant(s, ssize)), Some(NumericConstant(0, esize))) if s > 0 =>
             compile(ctx, List(
               Assignment(vex, f.start),
-              DoWhileStatement(f.body :+ decrement, FunctionCallExpression("!=", List(vex, f.end)))
+              DoWhileStatement(f.body, List(decrement), FunctionCallExpression("!=", List(vex, f.end)), names)
             ))
 
 
@@ -341,7 +343,7 @@ object StatementCompiler {
               Assignment(vex, f.start),
               WhileStatement(
                 FunctionCallExpression("<", List(vex, f.end)),
-                f.body :+ increment),
+                f.body, List(increment), names),
             ))
 //          case (ForDirection.To | ForDirection.ParallelTo, _, Some(NumericConstant(n, _))) if n > 0 && n < 255 =>
 //            compile(ctx, List(
@@ -351,16 +353,17 @@ object StatementCompiler {
 //                f.body :+ increment),
 //            ))
           case (ForDirection.To | ForDirection.ParallelTo, _, _) =>
-            val label = MfCompiler.nextLabel("to")
             compile(ctx, List(
               Assignment(vex, f.start),
               WhileStatement(
                 VariableExpression("true"),
-                f.body :+ IfStatement(
+                f.body,
+                List(IfStatement(
                   FunctionCallExpression("==", List(vex, f.end)),
-                  List(AssemblyStatement(JMP, AddrMode.Absolute, VariableExpression(label), elidable = true)),
-                  List(increment))),
-              AssemblyStatement(LABEL, AddrMode.DoesNotExist, VariableExpression(label), elidable=true)
+                  List(BreakStatement(variable)),
+                  List(increment)
+                )),
+                names),
             ))
           case (ForDirection.DownTo, _, _) =>
             compile(ctx, List(
@@ -368,12 +371,34 @@ object StatementCompiler {
               IfStatement(
                 FunctionCallExpression(">=", List(vex, f.end)),
                 List(DoWhileStatement(
-                  f.body :+ decrement,
-                  FunctionCallExpression("!=", List(vex, f.end))
+                  f.body,
+                  List(decrement),
+                  FunctionCallExpression("!=", List(vex, f.end)),
+                  names
                 )),
                 Nil)
             ))
         }
+
+      case BreakStatement(l) =>
+        ctx.breakLabels.get(l) match {
+          case None =>
+            if (l == "") ErrorReporting.error("`break` outside a loop", statement.position)
+            else ErrorReporting.error("Invalid label: " + l, statement.position)
+            Nil
+          case Some(label) =>
+            List(AssemblyLine.absolute(JMP, label))
+        }
+
+      case ContinueStatement(l) =>
+        ctx.continueLabels.get(l) match {
+          case None =>
+            if (l == "") ErrorReporting.error("`continue` outside a loop", statement.position)
+            else ErrorReporting.error("Invalid label: " + l, statement.position)
+            Nil
+          case Some(label) =>
+            List(AssemblyLine.absolute(JMP, label))
+        }
       // TODO
     }
   }

src/main/scala/millfork/node/Node.scala

@@ -176,7 +176,7 @@ case class IfStatement(condition: Expression, thenBranch: List[ExecutableStateme
   override def getAllExpressions: List[Expression] = condition :: (thenBranch ++ elseBranch).flatMap(_.getAllExpressions)
 }
 
-case class WhileStatement(condition: Expression, body: List[ExecutableStatement]) extends ExecutableStatement {
+case class WhileStatement(condition: Expression, body: List[ExecutableStatement], increment: List[ExecutableStatement], labels: Set[String] = Set("", "while")) extends ExecutableStatement {
   override def getAllExpressions: List[Expression] = condition :: body.flatMap(_.getAllExpressions)
 }
 
@@ -188,7 +188,7 @@ case class ForStatement(variable: String, start: Expression, end: Expression, di
   override def getAllExpressions: List[Expression] = VariableExpression(variable) :: start :: end :: body.flatMap(_.getAllExpressions)
 }
 
-case class DoWhileStatement(body: List[ExecutableStatement], condition: Expression) extends ExecutableStatement {
+case class DoWhileStatement(body: List[ExecutableStatement], increment: List[ExecutableStatement], condition: Expression, labels: Set[String] = Set("", "do")) extends ExecutableStatement {
   override def getAllExpressions: List[Expression] = condition :: body.flatMap(_.getAllExpressions)
 }
 
@@ -196,6 +196,14 @@ case class BlockStatement(body: List[ExecutableStatement]) extends ExecutableSta
   override def getAllExpressions: List[Expression] = body.flatMap(_.getAllExpressions)
 }
 
+case class BreakStatement(label: String) extends ExecutableStatement {
+  override def getAllExpressions: List[Expression] = Nil
+}
+
+case class ContinueStatement(label: String) extends ExecutableStatement {
+  override def getAllExpressions: List[Expression] = Nil
+}
+
 object AssemblyStatement {
   def implied(opcode: Opcode.Value, elidable: Boolean) = AssemblyStatement(opcode, AddrMode.Implied, LiteralExpression(0, 1), elidable)
 

src/main/scala/millfork/parser/MfParser.scala

@@ -312,7 +312,16 @@ case class MfParser(filename: String, input: String, currentDirectory: String, o
       case (p, l, r) => Assignment(l, r).pos(p)
     }
 
-  def keywordStatement: P[ExecutableStatement] = P(returnOrDispatchStatement | ifStatement | whileStatement | forStatement | doWhileStatement | inlineAssembly | assignmentStatement)
+  def keywordStatement: P[ExecutableStatement] = P(
+    returnOrDispatchStatement |
+      ifStatement |
+      whileStatement |
+      forStatement |
+      doWhileStatement |
+      breakStatement |
+      continueStatement |
+      inlineAssembly |
+      assignmentStatement)
 
   def executableStatement: P[ExecutableStatement] = (position() ~ P(keywordStatement | expressionStatement)).map { case (p, s) => s.pos(p) }
 
@@ -404,6 +413,10 @@ case class MfParser(filename: String, input: String, currentDirectory: String, o
 
   def returnOrDispatchStatement: P[ExecutableStatement] = "return" ~ !letterOrDigit ~/ HWS ~ (dispatchStatementBody | mlExpression(nonStatementLevel).?.map(ReturnStatement))
 
+  def breakStatement: P[ExecutableStatement] = ("break" ~ !letterOrDigit ~/ HWS ~ identifier.?).map(l => BreakStatement(l.getOrElse("")))
+
+  def continueStatement: P[ExecutableStatement] = ("continue" ~ !letterOrDigit ~/ HWS ~ identifier.?).map(l => ContinueStatement(l.getOrElse("")))
+
   def ifStatement: P[ExecutableStatement] = for {
     condition <- "if" ~ !letterOrDigit ~/ HWS ~/ mlExpression(nonStatementLevel)
     thenBranch <- AWS ~/ executableStatements
@@ -413,7 +426,7 @@ case class MfParser(filename: String, input: String, currentDirectory: String, o
   def whileStatement: P[ExecutableStatement] = for {
     condition <- "while" ~ !letterOrDigit ~/ HWS ~/ mlExpression(nonStatementLevel)
     body <- AWS ~ executableStatements
-  } yield WhileStatement(condition, body.toList)
+  } yield WhileStatement(condition, body.toList, Nil)
 
   def forDirection: P[ForDirection.Value] =
     ("parallel" ~ HWS ~ "to").!.map(_ => ForDirection.ParallelTo) |
@@ -439,7 +452,7 @@ case class MfParser(filename: String, input: String, currentDirectory: String, o
   def doWhileStatement: P[ExecutableStatement] = for {
     body <- "do" ~ !letterOrDigit ~/ AWS ~ executableStatements ~/ AWS
     condition <- "while" ~ !letterOrDigit ~/ HWS ~/ mlExpression(nonStatementLevel)
-  } yield DoWhileStatement(body.toList, condition)
+  } yield DoWhileStatement(body.toList, Nil, condition)
 
   def functionDefinition: P[DeclarationStatement] = for {
     p <- position()

src/test/scala/millfork/test/BreakContinueSuite.scala

@@ -0,0 +1,108 @@
+package millfork.test
+
+import millfork.test.emu.{EmuBenchmarkRun, EmuUnoptimizedRun}
+import org.scalatest.{FunSuite, Matchers}
+
+/**
+  * @author Karol Stasiak
+  */
+class BreakContinueSuite extends FunSuite with Matchers {
+
+  test("Break from one-iteration loop 1") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | void main () {
+        |   output = 0
+        |   do {
+        |     break
+        |     output += 1
+        |   } while false
+        | }
+      """.stripMargin)(_.readByte(0xc000) should equal(0))
+  }
+
+  test("Break from one-iteration loop 2") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | void main () {
+        |   output = 0
+        |   byte i
+        |   for i,0,to,0 {
+        |     break
+        |     output += 1
+        |   }
+        | }
+      """.stripMargin)(_.readByte(0xc000) should equal(0))
+  }
+
+  test("Break from infinite loop 1") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | void main () {
+        |   output = 0
+        |   while true {
+        |     output += 1
+        |     break
+        |     output += 1
+        |   }
+        | }
+      """.stripMargin)(_.readByte(0xc000) should equal(1))
+  }
+
+  test("Break and continue from infinite loop 1") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | void main () {
+        |   output = 0
+        |   while true {
+        |     if output != 0 { break }
+        |     output += 1
+        |     continue
+        |     output += 1
+        |   }
+        | }
+      """.stripMargin)(_.readByte(0xc000) should equal(1))
+  }
+
+  test("Nested break") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | void main () {
+        |   output = 0
+        |   do {
+        |     output += 1
+        |     while true {
+        |       break while
+        |     }
+        |     output += 1
+        |   } while false
+        | }
+      """.stripMargin)(_.readByte(0xc000) should equal(2))
+  }
+
+  test("Continue in for loop 1") {
+    EmuBenchmarkRun(
+      """
+        | byte output @$c000
+        | byte counter @$c001
+        | void main () {
+        |   output = 0
+        |   byte i
+        |   for i,0,paralleluntil,50 {
+        |     counter += 1
+        |     if i != 30 { continue }
+        |     output = i
+        |     break
+        |   }
+        | }
+      """.stripMargin){m =>
+      m.readByte(0xc000) should equal(30)
+      m.readByte(0xc001) should be > 10
+    }
+  }
+}