[Interpreter] Add support for JS calls.

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
diff --git a/src/ia32/builtins-ia32.cc b/src/ia32/builtins-ia32.cc
index 368b649a69ddde0a2b0e647b07cb9a3674c42970..563e7b5034effd22739eb3227a1d0eef615fea14 100644
--- a/src/ia32/builtins-ia32.cc
+++ b/src/ia32/builtins-ia32.cc
@@ -1577,6 +1577,41 @@ void Builtins::Generate_Call(MacroAssembler* masm) {
 }
 
 
+// static
+void Builtins::Generate_PushArgsAndCall(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- eax : the number of arguments (not including the receiver)
+  //  -- ebx : the address of the first argument to be pushed. Subsequent
+  //           arguments should be consecutive above this, in the same order as
+  //           they are to be pushed onto the stack.
+  //  -- edi : the target to call (can be any Object).
+
+  // Pop return address to allow tail-call after pushing arguments.
+  __ Pop(edx);
+
+  // Find the address of the last argument.
+  __ mov(ecx, eax);
+  __ add(ecx, Immediate(1));  // Add one for receiver.
+  __ shl(ecx, kPointerSizeLog2);
+  __ neg(ecx);
+  __ add(ecx, ebx);
+
+  // Push the arguments.
+  Label loop_header, loop_check;
+  __ jmp(&loop_check);
+  __ bind(&loop_header);
+  __ Push(Operand(ebx, 0));
+  __ sub(ebx, Immediate(kPointerSize));
+  __ bind(&loop_check);
+  __ cmp(ebx, ecx);
+  __ j(greater, &loop_header, Label::kNear);
+
+  // Call the target.
+  __ Push(edx);  // Re-push return address.
+  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
+}
+
+
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- eax : actual number of arguments