Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Introduce Preset Register Specialized Emission
- Introduce EmissionOption trait
- Introduce PresetAnnotation & PresetRegAnnotation
- Enable the collection of Annotations in the Emitter
- Introduce collection mechanism for EmissionOptions in the Emitter
- Add PropagatePresetAnnotation transform to annotate register for emission and clean-up the useless reset tree (no DCE involved)
- Add corresponding tests spec and tester

Co-authored-by: Jack Koenig <koenig@sifive.com>

* Fixes #1214

Co-authored-by: Jack Koenig <koenig@sifive.com>

- Use Dependency API for transform scheduling
- Add tests that old order/behavior is preserved

Or: "Now you're thinking with dependencies."

Co-authored-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>
Co-authored-by: Albert Magyar <albert.magyar@gmail.com>
Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: Albert Magyar <albert.magyar@gmail.com>

* Provide an annotation mix-in that marks RTs as dontTouch

* Update src/main/scala/firrtl/transforms/OptimizationAnnotations.scala

Co-Authored-By: Albert Magyar <albert.magyar@gmail.com>

* Update src/test/scala/firrtlTests/DCETests.scala

Co-Authored-By: Albert Magyar <albert.magyar@gmail.com>

* Update src/main/scala/firrtl/transforms/OptimizationAnnotations.scala

* Update OptimizationAnnotations.scala

Co-authored-by: Albert Magyar <albert.magyar@gmail.com>

* Fixes #486
* Improved version of #828

Make mergify open backport PRs & signal on failed cherry-picks

* Add firrtl-json serializers

* Added support for ports, info. Added docs and tests

* Avoid IndexOutOfBoundsException when Bits has too few consts

* Check for negative consts in all relevant primops

* Use BigInt for all checks on primop constants

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Revert inline nots

* Feedback from @jackkoening
* Merge into same stage as Ops to avoid Travis delays

This reverts commit f77487d3.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* Closes #890

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

EliminateTargetPaths and Unreachable Modules

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Adds a case to CircuitState.resolvePaths such that if no targets are
requested, then no ResolvePaths annotations are added.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Omnibus Dependency API Updates

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

This adds a prettyPrint method to the DependencyManager to enable
textual visualization of the TransformLikes that a DependencyManager
determines need to be run.

This also cleans up the GraphViz visualization with better edge
coloring and now uses the `name` method when labeling graphviz nodes.

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>

Signed-off-by: Schuyler Eldridge <schuyler.eldridge@ibm.com>