C2-only debug build fails

Reported by Xin Liu (xxinliu@amazon.com).

The C++ compiler complains attempting to compile aotCodeHeap.cpp with this configuration:

bash ./configure --with-jvm-features=-compiler1 --enable-option-checking=fatal --with-debug-level=fastdebug

results in

/Users/xxinliu/Devel/openjdk/jdk/src/hotspot/share/aot/aotCodeHeap.cpp:711:59: error: no member named 'aot_code' in 'Method'
  vmassert(aot->method()->code() != aot && aot->method()->aot_code() == NULL, "method still active");
                                           ~~~~~~~~~~~~~ ^
/Users/xxinliu/Devel/openjdk/jdk/src/hotspot/share/utilities/debug.hpp:55:9: note: expanded from macro 'vmassert'
  if (!(p)) { \
        ^
1 error generated.

A possible patch is:

diff -r 35e64b62b284 src/hotspot/share/aot/aotCodeHeap.cpp
--- a/src/hotspot/share/aot/aotCodeHeap.cpp Tue Jul 17 17:14:03 2018 -0400
+++ b/src/hotspot/share/aot/aotCodeHeap.cpp Tue Jul 17 15:51:11 2018 -0700
@@ -708,7 +708,9 @@
 void AOTCodeHeap::sweep_method(AOTCompiledMethod *aot) {
   int indexes[] = {aot->method_index()};
   sweep_dependent_methods(indexes, 1);
+#ifdef TIERED
   vmassert(aot->method()->code() != aot && aot->method()->aot_code() == NULL, "method still active");
+#endif
 }
 
 
diff -r 35e64b62b284 src/hotspot/share/aot/aotCompiledMethod.cpp
--- a/src/hotspot/share/aot/aotCompiledMethod.cpp Tue Jul 17 17:14:03 2018 -0400
+++ b/src/hotspot/share/aot/aotCompiledMethod.cpp Tue Jul 17 15:51:11 2018 -0700
@@ -208,8 +208,9 @@
 
 bool AOTCompiledMethod::make_entrant() {
   assert(!method()->is_old(), "reviving evolved method!");
+#ifdef TIERED
   assert(*_state_adr != not_entrant, "%s", method()->has_aot_code() ? "has_aot_code() not cleared" : "caller didn't check has_aot_code()");
-
+#endif
   // Make sure the method is not flushed in case of a safepoint in code below.
   methodHandle the_method(method());
   NoSafepointVerifier nsv;