8175096: Analyse subword in the loop to set maximum vector size
Reviewed-by: kvn

8182299: Enable disabled clang warnings, build on OSX 10 + Xcode 8
8182656: Make the required changes in GC code to build on OSX 10 + Xcode 8
8182657: Make the required changes in Runtime code to build on OSX 10 + Xcode 8
8182658: Make the required changes in Compiler code to build on OSX 10 + Xcode 8
Reviewed-by: jwilhelm, ehelin, phh
Contributed-by: phh <hohensee@amazon.com>, jwilhelm <jesper.wilhelmsson@oracle.com>

8175345: Reported null pointer dereference defect groups
Summary: Added required explicit NULL checks
Reviewed-by: thartmann, kvn

8170470: superword may miss reductions
Reviewed-by: kvn

8159016: Over-unrolled loop is partially removed
Summary: Prevent over-unrolling of loops by computing upper bound for trip count.
Reviewed-by: kvn

8159715: Fix for 8072422 is incorrect
Summary: Fixed several issues introduced by 8072422.
Reviewed-by: zmajo, kvn

8157726: VarHandles/Unsafe should support sub-word atomic ops
Reviewed-by: psandoz, vlivanov, lagergren

8154763: Crash with "assert(RangeCheckElimination)" if RangeCheckElimination is disabled
Summary: Disable multiversioning if range check elimination is turned off.
Reviewed-by: mcberg, kvn

8151573: Multiversioning for range check elimination
Summary: range check elimination in post loops
Reviewed-by: kvn

8072422: Cleanup: Remove some unused flags/code in loop optimizations
Summary: Remove unused flags, change test using them.
Reviewed-by: kvn, twisti

8148754: C2 loop unrolling fails due to unexpected graph shape
Summary: Check if graph shape is appropriate for optimization, bail out optimization if not.
Reviewed-by: kvn, twisti, shade, dnsimon

8148146: Integrate new internal Unsafe entry points, and basic intrinsic support for VarHandles
Reviewed-by: psandoz, kvn, jrose, adinn, simonis, coleenp

8149421: Vectorized Post Loops
Summary: add vectorised post loop for counted loops with vectors.
Reviewed-by: kvn

8137049: Code quality: reducing an trivial integer loop does not produce an optimal code
Summary: canonicalized if shape not recognized by empty loop detection code
Reviewed-by: kvn, shade

8147645: get_ctrl_no_update() code is wrong
Summary: Array.fill intrinsification code doesn't mark replaced control as dead
Reviewed-by: kvn

6675699: need comprehensive fix for unconstrained ConvI2L with narrowed type
Summary: Emit CastII to make narrow ConvI2L dependent on the corresponding range check.
Reviewed-by: kvn, roland

8145096: Undefined behaviour in HotSpot
Summary: Fix some integer overflows
Reviewed-by: jrose, kvn, kbarrett, adinn, iklam

8145754: PhaseIdealLoop::is_scaled_iv_plus_offset() does not match AddI
Summary: is_scaled_iv_plus_offset() should handle AddI nodes with scaled iv as second input.
Reviewed-by: kvn

8140424: don't prefix developer and notproduct flag variables with CONST_ in product builds
Reviewed-by: goetz, stefank

8137168: Replace IfNode with a new RangeCheckNode for range checks
Summary: new RangeCheckNode to enable optimization of explicit library level range checks
Reviewed-by: kvn, thartmann

8141132: JEP 254: Compact Strings
Summary: Adopt a more space-efficient internal representation for strings.
Reviewed-by: alanb, bdelsart, coleenp, iklam, jiangli, jrose, kevinw, naoto, pliden, roland, smarks, twisti
Contributed-by: Brent Christian <brent.christian@oracle.com>, Vivek Deshpande <vivek.r.deshpande@intel.com>, Tobias Hartmann <tobias.hartmann@oracle.com>, Charlie Hunt <charlie.hunt@oracle.com>, Vladimir Kozlov <vladimir.kozlov@oracle.com>, Roger Riggs <roger.riggs@oracle.com>, Xueming Shen <xueming.shen@oracle.com>, Aleksey Shipilev <aleksey.shipilev@oracle.com>, Sandhya Viswanathan <sandhya.viswanathan@intel.com>

8011858: Use Compile::live_nodes() instead of Compile::unique() in appropriate places
Reviewed-by: kvn, vlivanov
Contributed-by: vlad.ureche@gmail.com

8129920: Vectorized loop unrolling
Summary: optimize loop opts for vectorizible loops.
Reviewed-by: kvn, roland

8086069: Adapt runtime calls to recent intrinsics to pass ints as long
Summary: Remove CCallingConventionRequiresIntsAsLongs from shared code and push functionality to native wrapper. Less optimal but more flexible.
Reviewed-by: jrose, kvn

8080325: SuperWord loop unrolling analysis
Summary: Determine loop unroll factor based on supported vectors sizes.
Reviewed-by: roland, kvn

8085832: Optimize main and post loop out when pre loop is found empty
Summary: Eliminate main loop and post loop if pre loop becomes empty
Reviewed-by: kvn, mcberg

8078866: compiler/eliminateAutobox/6934604/TestIntBoxing.java assert(p_f->Opcode() == Op_IfFalse) failed
Summary: Bail out from range check elimination if pre loop is not found
Reviewed-by: kvn

8080976: Unexpected AIOOB thrown from 1.9.0-ea-b64 on (regression)
Summary: Loop variant use in reduction should prevent vectorization
Reviewed-by: kvn, mcberg

8076284: Improve vectorization of parallel streams
Summary: Improve vectorization of java/util/stream/Streams$RangeIntSpliterator::forEachRemaining() method and enable loop vectorization in a given method on demand.
Reviewed-by: kvn
Contributed-by: jan.civlin@intel.com

8074981: Integer/FP scalar reduction optimization
Summary: Add scalar reduction optimization to C2 to take advantage of vector instructions in modern x86 CPUs.
Reviewed-by: kvn, twisti
Contributed-by: michael.c.berg@intel.com

8073184: Compile of java.lang.Integer::getChars fails with LoopLimitCheck = false after 8054478
Summary: CastII that guards counted loops confuses range check elimination with LoopLimitCheck off
Reviewed-by: kvn, iveresov

8068864: C2 failed: modified node is not on IGVN._worklist
Summary: Use igvn.replace_input_of() instead of set_req().
Reviewed-by: iveresov, vlivanov

8054478: C2: Incorrectly compiled char[] array access crashes JVM
Summary: dead backbranch in main loop results in erroneous array access
Reviewed-by: kvn, iveresov

8058148: MaxNodeLimit and LiveNodeCountInliningCutoff
Reviewed-by: kvn, roland

8053915: bigapps assert failure in C2: modified node is not on IGVN._worklist
Summary: Add modified node to the IGVN worklist in 'PhaseIdealLoop::do_range_check'.
Reviewed-by: kvn, roland

8040213: C2 does not put all modified nodes on IGVN worklist
Summary: Verification code is added that checks if modified nodes are put on the IGVN worklist and modified nodes are processed by 'PhaseIterGVN::transform_old()'
Reviewed-by: kvn, jrose

8034812: remove IDX_INIT macro hack in Node class
Summary: The IDX_INIT macro used by Node::Node(...) to retrieve the Compile object is removed and replaced by a call to Compile::current(). The Node constructor, new operator and all calls to it are adapted accordingly.
Reviewed-by: kvn, jrose, iveresov, goetz

8039050: Crash in C2 compiler at Node::rematerialize
Summary: Added missing calls to record_for_igvn() in loop opts. Added verification of def-use domination.
Reviewed-by: iveresov

8001532: C2 node files refactoring
Summary: Split C2 node files into cast, convert, countbits, intrinsic, move, narrowptr and opaquenode classes
Reviewed-by: kvn, morris

8031320: Use Intel RTM instructions for locks
Summary: Use RTM for inflated locks and stack locks.
Reviewed-by: iveresov, twisti, roland, dcubed

8027754: Enable loop optimizations for loops with MathExact inside
Reviewed-by: kvn, iveresov

Merge

Merge

Merge

8024342: PPC64 (part 111): Support for C calling conventions that require 64-bit ints.
Summary: Some platforms, as ppc and s390x/zArch require that 32-bit ints are passed as 64-bit values to C functions. This change adds support to adapt the signature and to issue proper casts to c2-compiled stubs. The functions are used in generate_native_wrapper(). Adapt signature used by the compiler as in PhaseIdealLoop::intrinsify_fill().
Reviewed-by: kvn

8029233: Update copyright year to match last edit in jdk8 hotspot repository for 2013
Summary: Copyright year updated for files modified during 2013
Reviewed-by: twisti, iveresov

8017065: C2 allows safepoint checks to leak into G1 pre-barriers
Summary: Make all raw loads strictly respect control dependencies, make sure RCE doesn't move raw loads, add verification of G1 pre-barriers.
Reviewed-by: kvn, roland

8027444: mathExact: assert(i < _max) failed: oob: i=1, _max=1
Reviewed-by: duke

8024924: Intrinsify java.lang.Math.addExact
Reviewed-by: kvn, twisti

8022993: Convert MAX_UNROLL constant to LoopMaxUnroll C2 flag
Summary: Replace MAX_UNROLL constant with new C2 LoopMaxUnroll flag.
Reviewed-by: roland

8009181: [parfait] Null pointer deference in hotspot/src/share/vm/opto/loopTransform.cpp
Summary: add guarantee() to insert_pre_post_loops()
Reviewed-by: kvn

Merge

Merge

6896617: Optimize sun.nio.cs.ISO_8859_1$Encode.encodeArrayLoop() on x86
Summary: Use SSE4.2 and AVX2 instructions for encodeArray intrinsic.
Reviewed-by: roland

7092905: C2: Keep track of the number of dead nodes
Summary: keep an (almost) accurate running count of the reachable (live) flow graph nodes.
Reviewed-by: kvn, twisti, jrose, vlivanov

Merge

Merge

7198606: Improve VM optimization
Summary: Remove incorrect code in OptimizeFill optimization.
Reviewed-by: roland, twisti

Merge

7054512: Compress class pointers after perm gen removal
Summary: support of compress class pointers in the compilers.
Reviewed-by: kvn, twisti

8000313: C2 should use jlong for 64bit values
Summary: Replace all occurrences of long with jlong in C2 code.
Reviewed-by: kvn, twisti

7197424: update copyright year to match last edit in jdk8 hotspot repository
Summary: Update copyright year to 2012 for relevant files
Reviewed-by: dholmes, coleenp

7193318: C2: remove number of inputs requirement from Node's new operator
Summary: Deleted placement new operator of Node - node(size_t, Compile *, int).
Reviewed-by: kvn, twisti
Contributed-by: bharadwaj.yadavalli@oracle.com

7160161: Missed safepoint in non-Counted loop
Summary: Do not remove safepoints during peeling optimization.
Reviewed-by: twisti

7173340: C2: code cleanup: use PhaseIterGVN::replace_edge(Node*, int, Node*) where applicable
Summary: replace frequent C2 optimizer code patterns with new methods calls
Reviewed-by: kvn, twisti
Contributed-by: vladimir.x.ivanov@oracle.com

7054211: No loop unrolling done in jdk7b144 for a test update() while loop
Summary: restore unrolling code for CaffeineMark.
Reviewed-by: never

7077439: Possible reference through NULL in loopPredicate.cpp:726
Summary: Use cl->is_valid_counted_loop() check.
Reviewed-by: never

7068051: SIGSEGV in PhaseIdealLoop::build_loop_late_post
Summary: Removed predicate cloning from loop peeling optimization and from split fall-in paths.
Reviewed-by: never

7044738: Loop unroll optimization causes incorrect result
Summary: take into account memory dependencies when clonning nodes in clone_up_backedge_goo().
Reviewed-by: never

7052494: Eclipse test fails on JDK 7 b142
Summary: Keep 'ne' test in Counted loop when we can't guarantee during compilation that init < limit.
Reviewed-by: never

7045693: java/util/EnumSet/EnumSetBash.java still failing intermittently
Summary: New limit for unrolled loop should be set only for zero trip guard and loop iteration test.
Reviewed-by: never

7044725: -XX:-UnrollLimitCheck -Xcomp : Exception: String index out of range: 29488
Summary: Fix problems in new RCE code.
Reviewed-by: never

7043552: regression after 7042327
Summary: Generate Opaque2 node only during first unroll.
Reviewed-by: never

7042327: assert(opaq->outcnt() == 1 && opaq->in(1) == limit)
Summary: Separate limit by Opaque2 node when calculating new limit for unrolled loop.
Reviewed-by: never

5091921: Sign flip issues in loop optimizer
Summary: Fix integer overflow problem in the code generated by loop optimizer.
Reviewed-by: never

7039652: Performance regression after 7004547 changes
Summary: Use unrolled_count() to limit unrolling and use the stride check only for initial stride value.
Reviewed-by: never

Merge

7004555: Add new policy for one iteration loops
Summary: Add new policy for one iteration loops (mostly formal pre- loops).
Reviewed-by: never

7004547: regular loop unroll should not unroll more than max unrolling
Summary: Take into account that after unroll conjoined heads and tails will fold.
Reviewed-by: never

7026957: assert(type2aelembytes(store->as_Mem()->memory_type(), true) == 1 << shift->in(2)->get_int()) failed
Reviewed-by: kvn, jrose

7004535: Clone loop predicate during loop unswitch
Summary: Clone loop predicate for clonned loops
Reviewed-by: never

7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair

7032696: Fix for 7029152 broke VM
Summary: StrIntrinsicNode::Ideal() should not optimize memory during Parse.
Reviewed-by: jrose, never

7029152: Ideal nodes for String intrinsics miss memory edge optimization
Summary: In Ideal() method of String intrinsics nodes look for TypeAryPtr::CHARS memory slice if memory is MergeMem. Do not unroll a loop with String intrinsics code.
Reviewed-by: never

7024475: loop doesn't terminate when compiled
Reviewed-by: kvn

7008866: Missing loop predicate for loop with multiple entries
Summary: Add predicates when loop head bytecode is parsed instead of when back branch bytecode is parsed.
Reviewed-by: never

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

6980792: Crash "exception happened outside interpreter, nmethods and vtable stubs (1)"
Reviewed-by: kvn

6984979: OptimizeFill misses some cases with an odd memory graph
Reviewed-by: kvn

6982533: Crash in ~StubRoutines::jbyte_fill with AggressiveOpts enabled
Reviewed-by: kvn

4809552: Optimize Arrays.fill(...)
Reviewed-by: kvn

6677629: PhaseIterGVN::subsume_node() should call hash_delete() and add_users_to_worklist()
Summary: Use replace_node() method instead of subsume_node().
Reviewed-by: jrose, never

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

6930043: C2: SIGSEGV in javasoft.sqe.tests.lang.arr017.arr01702.arr01702.loop_forw(II)I
Reviewed-by: kvn

6930116: loop predication code does not handle If nodes with only one projection
Summary: Add check for iff->outcnt() < 2.
Reviewed-by: never

6927049: assert(is_Loop(),"invalid node class")
Reviewed-by: kvn

6894779: Loop Predication for Loop Optimizer in C2
Summary: Loop predication implementation
Reviewed-by: never, kvn

6862919: Update copyright year
Summary: Update copyright for files that have been modified in 2009, up to 07/09
Reviewed-by: tbell, ohair

6837146: Should perform unswitch before maximally unroll in loop transformation
Summary: Move loop unswitch before maximally unroll
Reviewed-by: never

6810672: Comment typos
Summary: I have collected some typos I have found while looking at the code.
Reviewed-by: kvn, never

6462850: generate biased locking code in C2 ideal graph
Summary: Inline biased locking code in C2 ideal graph during macro nodes expansion
Reviewed-by: never

6743188: incomplete fix for 6700047 C2 failed in idom_no_update
Reviewed-by: rasbold, kvn

6667595: Set probability FAIR for pre-, post- loops and ALWAYS for main loop
Summary: Fix loop's probability. Add optimizations to avoid spilling. Change InlineSmallCode to product flag.
Reviewed-by: never

6384206: Phis which are later unneeded are impairing our ability to inline based on static types
Reviewed-by: rasbold, jrose

Merge

6715633: when matching a memory node the adr_type should not change
Summary: verify the adr_type of a mach node was not changed
Reviewed-by: rasbold, never

6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold

6667612: (Escape Analysis) disable loop cloning if it has a scalar replaceable allocation
Summary: Cloning an allocation will not allow scalar replacement since memory operations could not be associated with one allocation.
Reviewed-by: rasbold

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