8193717: Import resolution performance regression in JDK 9 Summary: Avoiding iteration through all sub-scopes of single import scope when looking up by name by only using those that may contain the given name. Reviewed-by: mcimadamore

8203865: Metaspace cleanup: Remove unused MemRegion in VirtualSpaceNode Reviewed-by: dholmes, zgu

8202832: cycle detection depends on ordering of requires directives Summary: Ensuring cyclic dependencies among modules produce a compile-time error. Reviewed-by: vromero

Merge

8203262: Incorrect cmpxchg usage in MetaspaceGC::inc_capacity_until_GC Reviewed-by: pliden, shade

8203233: (tz) Upgrade time-zone data to tzdata2018e Reviewed-by: martin, naoto

8202842: G1 footprint regressions in jdk11+10 Summary: Lazily initialize G1FromCardCache to save on startup footprint if AlwaysPretouch is disabled. Reviewed-by: sjohanss, redestad

8203817: Monitor::try_lock() should not call check_prelock_state() Reviewed-by: dholmes, eosterlund, rehn

8203628: Optimize (masked) byte memory comparisons on x86 Reviewed-by: adinn, vlivanov, jrose

8202178: type.getKind() for var is None instead of Error Summary: make sure var kind != None for instance variables without initialization Reviewed-by: mcimadamore

8203028: Simplify reference processing in light of JDK-8175797 Summary: Removed special handling of Reference.next Reviewed-by: tschatzl, sjohanss, mchung

8200266: [Graal] Update ProblemList-graal.txt files Reviewed-by: kvn

8203369: Check for both EAGAIN and EWOULDBLOCK error codes Reviewed-by: alanb

8203793: cacerts/VerifyCACerts.java fails with java.lang.Exception: At least one cacert test failed Summary: Added equifaxsecureca to EXPIRY_EXC_ENTRIES list Reviewed-by: redestad

8203795: Change default compiler on Windows to VS2017 Reviewed-by: ihse, prr

8201518: add test for randomized iteration order of unmodifiable Set and Map Reviewed-by: plevart

8203368: ObjectInputStream filterCheck method throws NullPointerException Reviewed-by: bpb, smarks

8203699: java/lang/invoke/SpecialInterfaceCall fails with SIGILL on aarch64 Summary: fastdebug build fails with SIGILL Reviewed-by: shade, drwhite, aph

8202290: AtomicAppend tests fail on macOS 10.13 ("High Sierra") Summary: Reinstate actual running of tests for macOS version >= 10.13. Reviewed-by: alanb

8203689: Add failure code to threaddb exception messages` Reviewed-by: sspitsyn, cjplummer

8198323: testing.md not updated for repository layout change Reviewed-by: ehelin, erikj

8203221: Makefile fixes after Flight Recorder Reviewed-by: erikj

8203366: Tag added wrongly in Docs.gmk Reviewed-by: jjg, erikj

8203815: add tests failed because of 8203809 to the ProblemList-graal Summary: add tests to the ProblemList-graal.txt Reviewed-by: dholmes

8203816: add tests failed because of 8203174 to the ProblemList-graal Summary: add tests to the ProblemList-graal.txt Reviewed-by: dholmes

8202949: C2: assert(false) failed: Bad graph detected in build_loop_late Summary: Fixed trip count computation for counted loop with negative stride to prevent over-unrolling. Reviewed-by: roland

8184030: TestUseRTMLockingOptionOnUnsupportedVM - RTM locking optimization not supported is missing Summary: corrected the rtm unsupported error message for emulated client. Reviewed-by: thartmann, gromero

8199383: [TESTBUG] Open source VM testbase JVMTI tests Reviewed-by: sspitsyn, erikj