Refactoring various pieces of post interceptor caching.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 0bb6894097df50e809dd94c43618699ff860daca..826a4fbe01576bf24ac41f0988690046be4380ad 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -1145,6 +1145,16 @@ void MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) {
 }
 
 
+void MacroAssembler::CallExternalReference(ExternalReference ref,
+                                           int num_arguments) {
+  mov(eax, Immediate(num_arguments));
+  mov(ebx, Immediate(ref));
+
+  CEntryStub stub(1);
+  CallStub(&stub);
+}
+
+
 Object* MacroAssembler::TryCallRuntime(Runtime::Function* f,
                                        int num_arguments) {
   if (f->nargs >= 0 && f->nargs != num_arguments) {
@@ -1365,6 +1375,20 @@ void MacroAssembler::InvokeFunction(Register fun,
 }
 
 
+void MacroAssembler::InvokeFunction(JSFunction* function,
+                                    const ParameterCount& actual) {
+  ASSERT(function->is_compiled());
+  // Get the function and setup the context.
+  mov(edi, Immediate(Handle<JSFunction>(function)));
+  mov(esi, FieldOperand(edi, JSFunction::kContextOffset));
+
+  // Jump to the cached code (tail call).
+  Handle<Code> code(function->code());
+  ParameterCount expected(function->shared()->formal_parameter_count());
+  InvokeCode(code, expected, actual, RelocInfo::CODE_TARGET, JUMP_FUNCTION);
+}
+
+
 void MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, InvokeFlag flag) {
   // Calls are not allowed in some stubs.
   ASSERT(flag == JUMP_FUNCTION || allow_stub_calls());