diff options
Diffstat (limited to 'src/main/scala/firrtl/transforms')
| -rw-r--r-- | src/main/scala/firrtl/transforms/ConstantPropagation.scala | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/main/scala/firrtl/transforms/ConstantPropagation.scala b/src/main/scala/firrtl/transforms/ConstantPropagation.scala index 8217a9bd..2def130c 100644 --- a/src/main/scala/firrtl/transforms/ConstantPropagation.scala +++ b/src/main/scala/firrtl/transforms/ConstantPropagation.scala @@ -378,6 +378,8 @@ class ConstantPropagation extends Transform { nodeMap(lname) = constPropExpression(nodeMap, instMap, constSubOutputs)(pad(fval, ltpe)) case Mux(_, tval: Literal, fval: WRef, _) if weq(lref, fval) => nodeMap(lname) = constPropExpression(nodeMap, instMap, constSubOutputs)(pad(tval, ltpe)) + case WRef(`lname`, _,_,_) => // If a register is connected to itself, propagate zero + nodeMap(lname) = passes.RemoveValidIf.getGroundZero(ltpe) case _ => } // Mark instance inputs connected to a constant |