Treat all kArchNop instuctions as NOPs in jump threading.

src/compiler/instruction.h

Index: src/compiler/instruction.h
diff --git a/src/compiler/instruction.h b/src/compiler/instruction.h
index b5aea707d2e3ac21ff6f5f9db52faa06e22d9157..74efd86fbecef0510076425900b4a1d6743003ac 100644
--- a/src/compiler/instruction.h
+++ b/src/compiler/instruction.h
@@ -856,10 +856,7 @@ class Instruction final {
     reference_map_ = nullptr;
   }
 
-  bool IsNop() const {
-    return arch_opcode() == kArchNop && InputCount() == 0 &&
-           OutputCount() == 0 && TempCount() == 0;
-  }
+  bool IsNop() const { return arch_opcode() == kArchNop; }
 
   bool IsDeoptimizeCall() const {
     return arch_opcode() == ArchOpcode::kArchDeoptimize ||