// jssp now point to args[0], load and drop args[0] + receiver.
Register arg = argc;
__ Ldr(arg, MemOperand(jssp, 2 * kPointerSize, PostIndex));
// jssp now point to args[0], load and drop args[0] + receiver.
Register arg = argc;
__ Ldr(arg, MemOperand(jssp, 2 * kPointerSize, PostIndex));