diff options
Diffstat (limited to 'src/main/scala/firrtl/transforms/InlineCasts.scala')
| -rw-r--r-- | src/main/scala/firrtl/transforms/InlineCasts.scala | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/main/scala/firrtl/transforms/InlineCasts.scala b/src/main/scala/firrtl/transforms/InlineCasts.scala index 761252c1..de54a326 100644 --- a/src/main/scala/firrtl/transforms/InlineCasts.scala +++ b/src/main/scala/firrtl/transforms/InlineCasts.scala @@ -10,6 +10,7 @@ import firrtl.options.Dependency import firrtl.Utils.{isBitExtract, isCast, NodeMap} +@deprecated("Replaced by InlineAcrossCastsTransform", "FIRRTL 1.4.3") object InlineCastsTransform { // Checks if an Expression is made up of only casts terminated by a Literal or Reference @@ -54,7 +55,7 @@ object InlineCastsTransform { rec(false)(expr) } - /** Inline casts in a Statement + /** Inline across casts in a statement * * @param netlist a '''mutable''' HashMap mapping references to [[firrtl.ir.DefNode DefNode]]s to their connected * [[firrtl.ir.Expression Expression]]s. This function '''will''' mutate @@ -71,11 +72,17 @@ object InlineCastsTransform { case other => other } - /** Replaces truncating arithmetic in a Module */ + /** Inline across casts in a module */ def onMod(mod: DefModule): DefModule = mod.map(onStmt(new NodeMap)) } -/** Inline nodes that are simple casts */ +/** Inline expressions into casts and inline casts into other expressions + * + * Because casts are no-ops in the emitted Verilog, this transform eliminates statements that + * simply contain a cast. It does so by greedily building larger expression trees that contain at + * most one expression that is neither a cast nor reference-like node. + */ +@deprecated("Replaced by InlineAcrossCastsTransform", "FIRRTL 1.4.3") class InlineCastsTransform extends Transform with DependencyAPIMigration { override def prerequisites = firrtl.stage.Forms.LowFormMinimumOptimized ++ |