8174856: [TESTBUG] Missing DefineClass instances Reviewed-by: dholmes, ddmitriev

Merge

8165256: ARM64: vm/gc/concurrent/lp30yp10rp30mr0st300 Crash SIGBUS Reviewed-by: aph

8175054: Move new TestPrintMdo.java to hotspot/test directory Summary: Fixing incorrect push caused by changeset 12633:c809fcb66c81 Reviewed-by: dholmes Contributed-by: jini.george@oracle.com

8166188: G1 Needs pre barrier on dereference of weak JNI handles Summary: Add low tag to jweaks and G1 barrier for jweak loads. Reviewed-by: mgerdin, mdoerr, pliden, dlong, dcubed, coleenp, aph, tschatzl Contributed-by: kim.barrett@oracle.com, martin.doerr@sap.com, volker.simonis@sap.com

8174164: SafePointNode::_replaced_nodes breaks with irreducible loops Reviewed-by: kvn

8174957: [JVMCI] jaotc is broken in Xcomp mode Reviewed-by: iveresov

8138799: improve tests for CompilerToVM::MaterializeVirtualObjectTest Reviewed-by: kvn

8138801: develop tests to check that CompilerToVM::isMature state is consistence w/ reprofile Reviewed-by: kvn

8172050: some compiler/calls/ tests should have /native option Reviewed-by: kvn

8173896: SA: BasicLauncherTest.java (printmdo) fails for Client VM and Server VM with emulated-client Summary: Avoid running the test for client VMs and emulated client VMs, when method data is not available. Reviewed-by: sspitsyn, dsamersoff Contributed-by: jini.george@oracle.com

8174961: [JVMCI] incorrect implementation of isCompilable Reviewed-by: kvn

8172434: CompareAndExchangeObject inserts two pre-barriers Reviewed-by: kvn

Merge