abstract class Stage extends Phase

A Stage represents one stage in the FIRRTL hardware compiler framework. A Stage is, conceptually, a Phase that includes a command line interface.

The FIRRTL compiler is a stage as well as any frontend or backend that runs before/after FIRRTL. Concretely, Chisel is a Stage as is FIRRTL's Verilog emitter. Each stage performs a mathematical transformation on an AnnotationSeq where some input annotations are processed to produce different annotations. Command line options may be pulled in if available.

Source
Stage.scala
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  1. Stage
  2. Phase
  3. DependencyAPI
  4. TransformLike
  5. LazyLogging
  6. AnyRef
  7. Any
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Visibility
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Instance Constructors

  1. new Stage()

Abstract Value Members

  1. abstract def run(annotations: AnnotationSeq): AnnotationSeq

    Run this stage on some input annotations

    Run this stage on some input annotations

    annotations

    input annotations

    returns

    output annotations

    Attributes
    protected
  2. abstract val shell: Shell

    A utility that helps convert command line options to annotations

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. final def execute(args: Array[String], annotations: AnnotationSeq): AnnotationSeq

    Run this stage on on a mix of arguments and annotations

    Run this stage on on a mix of arguments and annotations

    args

    command line arguments

    returns

    output annotations

    Exceptions thrown

    firrtl.options.OptionsException if command line or annotation validation fails

  9. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  11. def getLogger: Logger
    Definition Classes
    LazyLogging
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def invalidates(a: Phase): Boolean

    A function that, given *another* transform (parameter a) will return true if this transform invalidates/undos the effects of the *other* transform (parameter a).

    A function that, given *another* transform (parameter a) will return true if this transform invalidates/undos the effects of the *other* transform (parameter a).

    a

    transform

    Definition Classes
    DependencyAPI
  14. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  15. val logger: Logger
    Attributes
    protected
    Definition Classes
    LazyLogging
  16. lazy val name: String

    The name of this Phase.

    The name of this Phase. This will be used to generate debug/error messages or when deleting annotations. This will default to the simpleName of the class.

    returns

    this phase's name

    Definition Classes
    PhaseTransformLike
    Note

    Override this with your own implementation for different naming behavior.

  17. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  18. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  19. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. def optionalPrerequisiteOf: Seq[Dependency[Phase]]

    A sequence of transforms to add this transform as an optionalPrerequisite.

    A sequence of transforms to add this transform as an optionalPrerequisite. The use of optionalPrerequisiteOf enables the transform declaring them to always run before some other transforms. However, declaring optionalPrerequisiteOf will not result in the sequence of transforms executing.

    This is useful for providing an ordering constraint to guarantee that other transforms (e.g., emitters) will not be scheduled before you.

    Definition Classes
    DependencyAPI
    Note

    This method **will not** result in the listed transforms running. If you want to add multiple transforms at once, you should use a DependencyManager with multiple targets.

  21. def optionalPrerequisites: Seq[Dependency[Phase]]

    All transforms that, if a prerequisite of *another* transform, will run before this transform.

    All transforms that, if a prerequisite of *another* transform, will run before this transform.

    Definition Classes
    DependencyAPI
    Note

    The use of a Seq here is to preserve input order. Internally, this will be converted to a private, ordered Set.

  22. def prerequisites: Seq[Dependency[Phase]]

    All transform that must run before this transform

    All transform that must run before this transform

    Definition Classes
    DependencyAPI
    Note

    The use of a Seq here is to preserve input order. Internally, this will be converted to a private, ordered Set.

  23. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  24. def toString(): String
    Definition Classes
    AnyRef → Any
  25. final def transform(annotations: AnnotationSeq): AnnotationSeq

    Execute this stage on some input annotations.

    Execute this stage on some input annotations. Annotations will be read from any input annotation files.

    annotations

    input annotations

    returns

    output annotations

    Definition Classes
    StageTransformLike
    Exceptions thrown

    firrtl.options.OptionsException if command line or annotation validation fails

  26. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Deprecated Value Members

  1. def dependents: Seq[Dependency[Phase]]

    All transforms that must run after this transform

    All transforms that must run after this transform

    This is a means of prerequisite injection into some other transform. Normally a transform will define its own prerequisites. Dependents exist for two main situations:

    First, they improve the composition of optional transforms. If some first transform is optional (e.g., an expensive validation check), you would like to be able to conditionally cause it to run. If it is listed as a prerequisite on some other, second transform then it must always run before that second transform. There's no way to turn it off. However, by listing the second transform as a dependent of the first transform, the first transform will only run (and be treated as a prerequisite of the second transform) if included in a list of target transforms that should be run.

    Second, an external library would like to inject some first transform before a second transform inside FIRRTL. In this situation, the second transform cannot have any knowledge of external libraries. The use of a dependent here allows for prerequisite injection into FIRRTL proper.

    Definition Classes
    DependencyAPI
    Annotations
    @deprecated
    Deprecated

    (Since version FIRRTL 1.3) Due to confusion, 'dependents' is being renamed to 'optionalPrerequisiteOf'. Override the latter instead.

    Note

    The use of a Seq here is to preserve input order. Internally, this will be converted to a private, ordered Set.

    See also

    firrtl.passes.CheckTypes for an example of an optional checking firrtl.Transform

Inherited from Phase

Inherited from DependencyAPI[Phase]

Inherited from TransformLike[AnnotationSeq]

Inherited from LazyLogging

Inherited from AnyRef

Inherited from Any

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