[turbofan] Do Smi comparison without untagging when lowering SpeculativeNumber(Compare).

src/compiler/representation-change.h

Index: src/compiler/representation-change.h
diff --git a/src/compiler/representation-change.h b/src/compiler/representation-change.h
index d7895da82504a86bc26443a3de32c2e010a562bf..4fa7d917b747a18c96425e12855f6a746c446155 100644
--- a/src/compiler/representation-change.h
+++ b/src/compiler/representation-change.h
@@ -238,6 +238,7 @@ class RepresentationChanger final {
                              UseInfo use_info);
   const Operator* Int32OperatorFor(IrOpcode::Value opcode);
   const Operator* Int32OverflowOperatorFor(IrOpcode::Value opcode);
+  const Operator* TaggedSignedOperatorFor(IrOpcode::Value opcode);
   const Operator* Uint32OperatorFor(IrOpcode::Value opcode);
   const Operator* Uint32OverflowOperatorFor(IrOpcode::Value opcode);
   const Operator* Float64OperatorFor(IrOpcode::Value opcode);