FFI Compiler based on code stub assembler

src/compiler/code-assembler.cc

Index: src/compiler/code-assembler.cc
diff --git a/src/compiler/code-assembler.cc b/src/compiler/code-assembler.cc
index d075cdcc4e80d5b470d7554578a7af78b5b7fe73..99de1cef424003793501b1512ea1c7856a4c17e3 100644
--- a/src/compiler/code-assembler.cc
+++ b/src/compiler/code-assembler.cc
@@ -249,6 +249,13 @@ Node* CodeAssembler::Parameter(int value) {
   return raw_assembler()->Parameter(value);
 }
 
+Node* CodeAssembler::GetJSContextParameter() {
+  CallDescriptor* desc = raw_assembler()->call_descriptor();
+  DCHECK(desc->IsJSFunctionCall());
+  return Parameter(Linkage::GetJSCallContextParamIndex(
+      static_cast<int>(desc->JSParameterCount())));
+}
+
 void CodeAssembler::Return(Node* value) {
   return raw_assembler()->Return(value);
 }
@@ -602,6 +609,12 @@ template V8_EXPORT_PRIVATE Node* CodeAssembler::TailCallBytecodeDispatch(
     const CallInterfaceDescriptor& descriptor, Node* target, Node*, Node*,
     Node*, Node*);
 
+Node* CodeAssembler::CallCFunctionN(Signature<MachineType>* signature,
+                                    int input_count, Node* const* inputs) {
+  CallDescriptor* desc = Linkage::GetSimplifiedCDescriptor(zone(), signature);
+  return raw_assembler()->CallN(desc, input_count, inputs);
+}
+
 Node* CodeAssembler::CallCFunction2(MachineType return_type,
                                     MachineType arg0_type,
                                     MachineType arg1_type, Node* function,