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// SPDX-License-Identifier: Apache-2.0
package firrtl.transforms
import firrtl.{CircuitState, DependencyAPIMigration, Transform}
import firrtl.analyses.InstanceKeyGraph
import firrtl.options.Dependency
import firrtl.stage.Forms
/** Return a circuit where all modules (and external modules) are defined before use. */
class SortModules extends Transform with DependencyAPIMigration {
override def prerequisites = Seq(Dependency(firrtl.passes.CheckChirrtl))
override def optionalPrerequisites = Seq.empty
override def optionalPrerequisiteOf = Forms.ChirrtlEmitters
override def invalidates(a: Transform) = false
override def execute(state: CircuitState): CircuitState = {
val modulesx = InstanceKeyGraph(state.circuit).moduleOrder.reverse
state.copy(circuit = state.circuit.copy(modules = modulesx))
}
}
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