Reviewed-by: neliasso, rkennke, dlong

Summary: Added C2 matching rules to remove unnecessary sign extension for byte array access.
Reviewed-by: roland, kvn, aph, adinn

Reviewed-by: andrew, phh

Summary: Cast to void* within DTRACE_CLASS* macros.
Reviewed-by: coleenp, shade

Summary: Implement _lh_array_tag_type_value as const, not enum.
Reviewed-by: vlivanov, minqi

Reviewed-by: phh, mbalao, bae

Reviewed-by: kbarrett, tschatzl

Reviewed-by: lancea, clanger, andrew

Reviewed-by: serb, dmarkov, andrew

8202884: SA: Attach/detach might fail on Linux if debugee application create/destroy threads during attaching
Summary: While doing a ptrace attach, do not attach to threads which are in the process of exiting or are zombies -- skip these threads.
Reviewed-by: jcbeyler, ysuenaga

Reviewed-by: goetz, mdoerr
Contributed-by: NKazunori Ogata <ogatak@jp.ibm.com>

Summary: Change copyright date from 2017 to 2018.
Reviewed-by: andrew

Reviewed-by: sla, kbarrett, gziemski

Reviewed-by: thartmann, kvn

Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: sgehwolf, thartmann, andrew

Summary: Includes compile_id addition from JDK-8054492
Reviewed-by: andrew

Reviewed-by: prr

Reviewed-by: mdoerr, goetz
Contributed-by: NGustavo Serra Scalet &lt;gustavo.scalet@eldorado.org.br&gt;, Kazunori Ogata <ogatak@jp.ibm.com>

Summary: Avoided collecting unaligned stores in Initialize node by making can_capture_store return false for same
Reviewed-by: dlong, kvn, vlivanov

Reviewed-by: clanger

Reviewed-by: simonis, mdoerr
Contributed-by: NMichihiro Horie <horie@jp.ibm.com>

Reviewed-by: clanger, andrew

Summary: Bail out of CEE if one of the gotos is a safepoint but the if is not.
Reviewed-by: vlivanov, mdoerr

Reviewed-by: sspitsyn, cjplummer