[turbofan] Combine family of CallStub() methods into single implementation.

src/compiler/code-assembler.h

 // Copyright 2015 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_CODE_ASSEMBLER_H_
 #define V8_COMPILER_CODE_ASSEMBLER_H_
 
 #include <map>
 #include <memory>
 
 // Clients of this interface shouldn't depend on lots of compiler internals.
 // Do not include anything from src/compiler here!
 #include "src/allocation.h"
 #include "src/builtins/builtins.h"
+#include "src/code-factory.h"
 #include "src/globals.h"
 #include "src/heap/heap.h"
 #include "src/machine-type.h"
 #include "src/runtime/runtime.h"
 #include "src/zone/zone-containers.h"
 
 namespace v8 {
 namespace internal {
 
 class Callable;
@@ skipping 284 matching lines @@
 
   // A pair of a zero-based argument index and a value.
   // It helps writing arguments order independent code.
   struct Arg {
     Arg(int index, Node* value) : index(index), value(value) {}
 
     int const index;
     Node* const value;
   };
 
-  Node* CallStub(Callable const& callable, Node* context, Node* arg1,
-                 size_t result_size = 1);
-  Node* CallStub(Callable const& callable, Node* context, Node* arg1,
-                 Node* arg2, size_t result_size = 1);
-  Node* CallStub(Callable const& callable, Node* context, Node* arg1,
-                 Node* arg2, Node* arg3, size_t result_size = 1);
-  Node* CallStub(Callable const& callable, Node* context, Node* arg1,
-                 Node* arg2, Node* arg3, Node* arg4, size_t result_size = 1);
-  Node* CallStubN(Callable const& callable, Node** args,
-                  size_t result_size = 1);
+  template <class... TArgs>
+  Node* CallStub(Callable const& callable, Node* context, TArgs... args) {
+    Node* target = HeapConstant(callable.code());
+    return CallStub(callable.descriptor(), target, context, args...);
+  }
 
+  template <class... TArgs>
   Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, size_t result_size = 1);
-  Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, Node* arg1, size_t result_size = 1);
-  Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, Node* arg1, Node* arg2, size_t result_size = 1);
-  Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, Node* arg1, Node* arg2, Node* arg3,
-                 size_t result_size = 1);
-  Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4,
-                 size_t result_size = 1);
-  Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
-                 Node* context, Node* arg1, Node* arg2, Node* arg3, Node* arg4,
-                 Node* arg5, size_t result_size = 1);
+                 Node* context, TArgs... args) {
+    return CallStubR(descriptor, 1, target, context, args...);
+  }
+
+  template <class... TArgs>
+  Node* CallStubR(const CallInterfaceDescriptor& descriptor, size_t result_size,
+                  Node* target, Node* context, TArgs... args);
+
+  Node* CallStubN(const CallInterfaceDescriptor& descriptor, size_t result_size,
+                  int input_count, Node* const* inputs);
 
   Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
                  Node* context, const Arg& arg1, const Arg& arg2,
                  size_t result_size = 1);
   Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
                  Node* context, const Arg& arg1, const Arg& arg2,
                  const Arg& arg3, size_t result_size = 1);
   Node* CallStub(const CallInterfaceDescriptor& descriptor, Node* target,
                  Node* context, const Arg& arg1, const Arg& arg2,
                  const Arg& arg3, const Arg& arg4, size_t result_size = 1);
@@ skipping 192 matching lines @@
   ZoneSet<CodeAssemblerVariable::Impl*> variables_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeAssemblerState);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_CODE_ASSEMBLER_H_