X64: Enable lazy compilation and add code generation for simple object...

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
===================================================================
--- src/x64/stub-cache-x64.cc	(revision 2231)
+++ src/x64/stub-cache-x64.cc	(working copy)
@@ -122,10 +122,34 @@
 }
 
 
-Object* StubCompiler::CompileLazyCompile(Code::Flags a) {
-  UNIMPLEMENTED();
-  return NULL;
+#define __ ACCESS_MASM(masm())
+
+
+// TODO(1241006): Avoid having lazy compile stubs specialized by the
+// number of arguments. It is not needed anymore.
+Object* StubCompiler::CompileLazyCompile(Code::Flags flags) {
+  // Enter an internal frame.
+  __ EnterInternalFrame();
+
+  // Push a copy of the function onto the stack.
+  __ push(rdi);
+
+  __ push(rdi);  // function is also the parameter to the runtime call
+  __ CallRuntime(Runtime::kLazyCompile, 1);
+  __ pop(rdi);
+
+  // Tear down temporary frame.
+  __ LeaveInternalFrame();
+
+  // Do a tail-call of the compiled function.
+  __ lea(rcx, FieldOperand(rax, Code::kHeaderSize));
+  __ jmp(rcx);
+
+  return GetCodeWithFlags(flags, "LazyCompileStub");
 }
 
 
+#undef __
+
+
 } }  // namespace v8::internal