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/* NSC -- new scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Martin Odersky
*/
/* NSC -- new scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package backend
package icode
import java.io.PrintWriter
import scala.collection.mutable
import scala.tools.nsc.symtab._
import analysis.{ Liveness, ReachingDefinitions }
import scala.tools.nsc.symtab.classfile.ICodeReader
/** Glue together ICode parts.
*
* @author Iulian Dragos
*/
abstract class ICodes extends AnyRef
with Members
with BasicBlocks
with Opcodes
with TypeStacks
with TypeKinds
with ExceptionHandlers
with Primitives
with Linearizers
with Printers
with Repository
{
val global: Global
import global.{ definitions, settings }
/** The ICode representation of classes */
val classes = new mutable.HashMap[global.Symbol, IClass]
/** Debugging flag */
def shouldCheckIcode = settings.check contains global.genicode.phaseName
def checkerDebug(msg: String) = if (shouldCheckIcode && global.opt.debug) println(msg)
/** The ICode linearizer. */
val linearizer: Linearizer = settings.Xlinearizer.value match {
case "rpo" => new ReversePostOrderLinearizer()
case "dfs" => new DepthFirstLinerizer()
case "normal" => new NormalLinearizer()
case "dump" => new DumpLinearizer()
case x => global.abort("Unknown linearizer: " + x)
}
/** Have to be careful because dump calls around, possibly
* re-entering methods which initiated the dump (like foreach
* in BasicBlocks) which leads to the icode output olympics.
*/
private var alreadyDumping = false
/** Print all classes and basic blocks. Used for debugging. */
def dump {
if (alreadyDumping) return
else alreadyDumping = true
val printer = new TextPrinter(new PrintWriter(Console.out, true),
new DumpLinearizer)
classes.values foreach printer.printClass
}
def checkValid(m: IMethod) {
for (b <- m.code.blocks)
if (!b.closed) {
m.dump
global.abort("Open block: " + b + " " + b.flagsString)
}
}
object liveness extends Liveness {
val global: ICodes.this.global.type = ICodes.this.global
}
object reachingDefinitions extends ReachingDefinitions {
val global: ICodes.this.global.type = ICodes.this.global
}
lazy val AnyRefReference: TypeKind = REFERENCE(definitions.AnyRefClass)
lazy val BoxedUnitReference: TypeKind = REFERENCE(definitions.BoxedUnitClass)
lazy val NothingReference: TypeKind = REFERENCE(definitions.NothingClass)
lazy val NullReference: TypeKind = REFERENCE(definitions.NullClass)
lazy val ObjectReference: TypeKind = REFERENCE(definitions.ObjectClass)
lazy val StringReference: TypeKind = REFERENCE(definitions.StringClass)
lazy val ThrowableReference: TypeKind = REFERENCE(definitions.ThrowableClass)
object icodeReader extends ICodeReader {
lazy val global: ICodes.this.global.type = ICodes.this.global
}
/** A phase which works on icode. */
abstract class ICodePhase(prev: Phase) extends global.GlobalPhase(prev) {
override def erasedTypes = true
override def apply(unit: global.CompilationUnit): Unit =
unit.icode foreach apply
def apply(cls: global.icodes.IClass): Unit
}
}
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