Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: Njmasa &lt;jon.masamitsu@oracle.com&gt;, stefank &lt;stefan.karlsson@oracle.com&gt;, mgerdin &lt;mikael.gerdin@oracle.com&gt;, never <tom.rodriguez@oracle.com>

Summary: Do not remove safepoints during peeling optimization.
Reviewed-by: twisti

7192406: JSR 292: C2 needs exact return type information for invokedynamic and invokehandle call sites
Reviewed-by: kvn

Reviewed-by: kvn, dholmes, coleenp
Contributed-by: NTao Mao <tao.mao@oracle.com>

Summary: Add split_arena to allocate temporary arrays in PhaseChaitin::Split() and free them on method's exit.
Reviewed-by: twisti

Summary: Change pair check to vector check in RA bias coloring code.
Reviewed-by: jrose, twisti

Summary: Fixed Pack node generation. Not vectorize shift instructions if count is not the same for all shifts and if count is vector.
Reviewed-by: twisti

Summary: Shifts with loop variant counts "a[i]=1<<b[i];" should not be vectorized since hw does not support it.
Reviewed-by: twisti

Reviewed-by: kvn, roland, jrose

Summary: In C2 add software membar after load from Reference.referent field to prevent commoning of loads across safepoint since GC can change its value. In C1 always generate Reference.get() intrinsic.
Reviewed-by: roland, twisti, dholmes, johnc

Summary: Added asm encoding and mach nodes for vector arithmetic instructions on x86.
Reviewed-by: roland

Reviewed-by: kvn, jrose

Summary: Added new FormatBufferResource class to use thread's resource area for error message buffer.
Reviewed-by: twisti

Reviewed-by: kvn, twisti

6984705: JSR 292 method handle creation should not go through JNI
Summary: remove assembly code for JDK 7 chained method handles
Reviewed-by: jrose, twisti, kvn, mhaupt
Contributed-by: NJohn Rose &lt;john.r.rose@oracle.com&gt;, Christian Thalinger &lt;christian.thalinger@oracle.com&gt;, Michael Haupt <michael.haupt@oracle.com>

Summary: replace recursive method with iterative
Reviewed-by: kvn, twisti
Contributed-by: dean.long@oracle.com

Summary: Don't eliminate Integer::toString() call node during String concatenation optimization if it has several uses.
Reviewed-by: twisti

Summary: Use uncast node equivalence checks in CmpUNode::sub.
Reviewed-by: kvn, twisti
Contributed-by: vladimir.x.ivanov@oracle.com

Summary: Use class exactness as part of the condition for class compare optimization instead of assert.
Reviewed-by: twisti, roland

Summary: When c2 intrinsifies pow/exp, it should never inline the java implementations.
Reviewed-by: kvn

7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain

Summary: check for and skip diamond shaped NULL check code for the result of toString()
Reviewed-by: twisti, roland

Summary: When looking for the same value in an other register check that all parts of that register has the same value.
Reviewed-by: johnc, twisti

Summary: disable vectorization of a memory access with more elements per vector than one which is used for alignment on sparc
Reviewed-by: twisti

Reviewed-by: jrose, kvn

Summary: Arrays.copyOfRange(original, from, to) with from > original.length tries to do a copy with a negative length.
Reviewed-by: kvn, twisti

Summary: Increase vector size up to 256-bits for YMM AVX registers on x86.
Reviewed-by: never, twisti, roland

Summary: replace frequent C2 optimizer code patterns with new methods calls
Reviewed-by: kvn, twisti
Contributed-by: vladimir.x.ivanov@oracle.com

Reviewed-by: kvn, twisti
Contributed-by: NKrystal Mok <sajia@taobao.com>

Summary: keep intermediate node alive till the end of the graph construction using dummy hook node trick
Reviewed-by: kvn, twisti
Contributed-by: vladimir.x.ivanov@oracle.com

Summary: Add missing check for EncodeP node in MemNode::Ideal_common_DU_postCCP() method.
Reviewed-by: twisti

Summary: optimize this code pattern obj.getClass() == A.class.
Reviewed-by: jrose, kvn
Contributed-by: NKrystal Mok <sajia@taobao.com>

Reviewed-by: kvn, twisti
Contributed-by: NKrystal Mok <sajia@taobao.com>

Summary: use x87 instructions to implement exp() and pow() in interpreter/c1/c2.
Reviewed-by: kvn, never, twisti

Summary: Allow a version of String class that doesn't have count and offset fields.
Reviewed-by: never, coleenp

Summary: When constructing input vector use type of vector's operation which use it since element's sizes should match.
Reviewed-by: never, twisti

7161796: PhaseStringOpts::fetch_static_field tries to fetch field from the Klass instead of the mirror
Reviewed-by: twisti

Reviewed-by: never, twisti
Contributed-by: nils.eliasson@oracle.com

Summary: disabling default config files if -XX:-ReadDefaultConfigFiles
Reviewed-by: phh, jrose, dcubed, dholmes

Summary: Skip only G1 cases and explicitly set global escape state in unsafe cases.
Reviewed-by: never