[wasm] WasmRunner can run tests with I64 parameters and return value.

src/compiler/linkage.h

 // 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.
 
 #ifndef V8_COMPILER_LINKAGE_H_
 #define V8_COMPILER_LINKAGE_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/frame.h"
 #include "src/compiler/operator.h"
@@ skipping 291 matching lines @@
 // well as {param_index} (i.e. as stored in parameter nodes) into an operator
 // representing the architecture-specific location. The following call node
 // layouts are supported (where {n} is the number of value inputs):
 //
 //                  #0          #1     #2     #3     [...]             #n
 // Call[CodeStub]   code,       arg 1, arg 2, arg 3, [...],            context
 // Call[JSFunction] function,   rcvr,  arg 1, arg 2, [...], new, #arg, context
 // Call[Runtime]    CEntryStub, arg 1, arg 2, arg 3, [...], fun, #arg, context
 class Linkage : public ZoneObject {
  public:
-  explicit Linkage(CallDescriptor* incoming) : incoming_(incoming) {}
+  explicit Linkage(const CallDescriptor* incoming) : incoming_(incoming) {}

[titzer, 2016/02/18 08:21:32]

CallDescriptors are immutable, so no need to add this C++ goop everywhere.

 
-  static CallDescriptor* ComputeIncoming(Zone* zone, CompilationInfo* info);
+  static const CallDescriptor* ComputeIncoming(Zone* zone,
+                                               CompilationInfo* info);
 
   // The call descriptor for this compilation unit describes the locations
   // of incoming parameters and the outgoing return value(s).
-  CallDescriptor* GetIncomingDescriptor() const { return incoming_; }
+  const CallDescriptor* GetIncomingDescriptor() const { return incoming_; }
   static CallDescriptor* GetJSCallDescriptor(Zone* zone, bool is_osr,
                                              int parameter_count,
                                              CallDescriptor::Flags flags);
 
   static CallDescriptor* GetRuntimeCallDescriptor(
       Zone* zone, Runtime::FunctionId function, int parameter_count,
       Operator::Properties properties, CallDescriptor::Flags flags);
 
   static CallDescriptor* GetStubCallDescriptor(
       Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
@@ skipping 53 matching lines @@
     return parameter_count + 2;  // Parameter (arity + 2) is special.
   }
 
   // A special {Parameter} index for JSCalls that represents the closure.
   static const int kJSCallClosureParamIndex = -1;
 
   // A special {OsrValue} index to indicate the context spill slot.
   static const int kOsrContextSpillSlotIndex = -1;
 
  private:
-  CallDescriptor* const incoming_;
+  const CallDescriptor* const incoming_;
 
   DISALLOW_COPY_AND_ASSIGN(Linkage);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LINKAGE_H_