Deduplicate a Circuit
Deduplicate a Circuit
Input Firrtl AST
A transformed Firrtl AST
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
).
transform
A convenience function useful for debugging and error messages
A convenience function useful for debugging and error messages
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.
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.
All transform that must run before this transform
All transform that must run before this transform
The use of a Seq here is to preserve input order. Internally, this will be converted to a private, ordered Set.
Deduplicates a circuit, and records renaming
Deduplicates a circuit, and records renaming
Circuit to dedup
Modules not to dedup
Deduped Circuit and corresponding RenameMap
Perform the transform and update annotations.
Perform the transform and update annotations.
Input Firrtl AST
A transformed Firrtl AST
A mathematical transform on some type
A mathematical transform on some type
an output object of the same type
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.
(Since version FIRRTL 1.3) Due to confusion, 'dependents' is being renamed to 'optionalPrerequisiteOf'. Override the latter instead.
The use of a Seq here is to preserve input order. Internally, this will be converted to a private, ordered Set.
firrtl.passes.CheckTypes for an example of an optional checking firrtl.Transform
(Since version ) see corresponding Javadoc for more information.
(Since version FIRRTL 1.3) Use Dependency API methods for equivalent functionality. See: https://bit.ly/2Voppre
(Since version FIRRTL 1.3) Use Dependency API methods for equivalent functionality. See: https://bit.ly/2Voppre
Only use on legal Firrtl.
Specifically, the restriction of instance loops must have been checked, or else this pass can infinitely recurse.
Deduped modules are renamed using a chain of 3 RenameMaps. The first RenameMap renames the original annotations.ModuleTargets and relative annotations.InstanceTargets to the groups of absolute annotations.InstanceTargets that they target. These renames only affect instance names and paths and use the old module names. During this rename, modules will also have their instance names renamed if they dedup with a module that has different instance names. The second RenameMap renames all component names within modules that dedup with another module that has different component names. The third RenameMap renames original annotations.ModuleTargets to their deduped annotations.ModuleTarget.
This transform will also emit DedupedResult for deduped modules that only have one instance.