[turbofan] Introduce CallDescriptorOf helper for safety.

src/compiler/int64-lowering.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/int64-lowering.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/machine-operator.h"
@@ skipping 207 matching lines @@
       DefaultLowering(node);
       int new_return_count = GetReturnCountAfterLowering(signature());
       if (signature()->return_count() != new_return_count) {
         NodeProperties::ChangeOp(node, common()->Return(new_return_count));
       }
       break;
     }
     case IrOpcode::kCall: {
       // TODO(turbofan): Make WASM code const-correct wrt. CallDescriptor.
       CallDescriptor* descriptor =
-          const_cast<CallDescriptor*>(OpParameter<const CallDescriptor*>(node));
+          const_cast<CallDescriptor*>(CallDescriptorOf(node->op()));
       if (DefaultLowering(node) ||
           (descriptor->ReturnCount() == 1 &&
            descriptor->GetReturnType(0) == MachineType::Int64())) {
         // We have to adjust the call descriptor.
         const Operator* op = common()->Call(
             wasm::ModuleEnv::GetI32WasmCallDescriptor(zone(), descriptor));
         NodeProperties::ChangeOp(node, op);
       }
       if (descriptor->ReturnCount() == 1 &&
           descriptor->GetReturnType(0) == MachineType::Int64()) {
@@ skipping 581 matching lines @@
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_low, false),
                 graph()->NewNode(
                     common()->Phi(MachineRepresentation::kWord32, value_count),
                     value_count + 1, inputs_high, false));
   }
 }
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8