RFR: 8301769: Generational ZGC: Indirect access barriers are never elided
Roberto Castañeda Lozano
rcastanedalo at openjdk.org
Fri Feb 17 10:36:55 UTC 2023
On Fri, 17 Feb 2023 08:47:47 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:
>> This changeset extends barrier elision analysis to handle atomic (x64, riscv, aarch64) and volatile (aarch64) memory access instructions. Offset-based addressing modes are unavailable or disabled for these instructions, which defeats the regular [address component analysis](https://github.com/openjdk/zgc/blob/c16d33431f13e927f40b1fde99c5877f5a5eca6e/src/hotspot/share/gc/z/c2/zBarrierSetC2.cpp#L606-L617) (finding the base and offset of an address) that is central to barrier elision analysis. The changeset extends the address component analysis with special handling to detect and extract the component information from the inputs and Ideal type of the address computation node. The proposed extension relies on the fact that AddP-matched Mach nodes contain the base address in the same input slot, as [guaranteed by Matcher::ReduceInst()](https://github.com/openjdk/zgc/blob/c16d33431f13e927f40b1fde99c5877f5a5eca6e/src/hotspot/share/opto/matcher.cpp#L1838-L1841).
>>
>> The changeset also adds additional test cases that exercise analysis of atomic accesses on arrays, with the goal of testing more complex address computations, and enables the tests in aarch64. @TheRealMDoerr, @RealFYang: please let me know if you want to try out the tests on the other ZGC-supporting architectures and enable them as part of this changeset or handle that later.
>>
>> **Testing:** tier1-7 (x64 and aaarch64; linux, windows, and macosx; release and debug mode)
>>
>> #### Alternative solutions
>>
>> Three alternative solutions were explored and discarded in favor of this one:
>>
>> - Re-enable addressing modes for x64 atomics by duplicating the ADL instruction rules (see [prototype](https://github.com/openjdk/zgc/compare/zgc_generational...robcasloz:zgc:JDK-8301769-duplicate-adl-rules)). This enables the regular address component analysis for x64 but does not improve the situation for the other architectures. Furthermore, it makes the ZGC-specific ADL code less maintainable.
>>
>> - Re-enable addressing modes for x64 atomics by introducing an ADL construct (e.g. an "operand effect") to enforce that a certain operand is always assigned a distinct register from the other operands. This has the same effect as the above alternative without affecting the readability of the ZGC-specific ADL code, but it still does not solve the issue for the other architectures.
>>
>> - Extend the address component analysis with special handling as in this changeset, but performing a local analysis of the input address computation node (see [prototype](https://github.com/openjdk/zgc/compare/zgc_generational...robcasloz:zgc:JDK-8301769-mach-analysis)). This has a similar effect as this changeset for x64 but is less effective for other architectures with simpler addressing modes such as aarch64, where address computations are sometimes performed in multiple steps.
>>
>> An open question is whether the local scope of the regular address component analysis affects the effectiveness of barrier elision for regular (non-atomic, non-volatile) memory accesses in architectures with more limited addressing modes than x64.
>
> Compilations (7) of Failed Methods (7)
> --------------------------------------
> 1) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testAllocateArrayThenStoreAtUnknownIndex(compiler.gcbarriers.Outer,int)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 29 [[ ]] #top
> 1 Root === 1 2 68 87 [[ 1 29 48 54 84 115 ]] inner
> 2 ShouldNotReachHere === 3 0 0 34 0 [[ 1 ]] !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 4 CallStaticJavaDirect === 94 60 64 34 66 115 0 0 0 0 0 0 0 0 0 0 0 0 0 108 9 106 8 106 107 7 6 [[ 5 3 103 ]] Static wrapper for: uncommon_trap(reason='range_check' action='make_not_entrant') # void ( int ) C=0.000100 VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181) !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 6 ConP === 29 [[ 4 ]] #jdk/internal/util/Preconditions$4 (java/util/function/BiFunction):exact * Oop:jdk/internal/util/Preconditions$4 (java/util/function/BiFunction):exact *
> 7 ConI === 29 [[ 4 ]] #int:42
> 8 ConP === 29 [[ 4 ]] #jdk/internal/misc/Unsafe:exact * Oop:jdk/internal/misc/Unsafe:exact *
> 9 ConP === 29 [[ 4 ]] #java/lang/invoke/VarHandleReferences$Array (java/lang/constant/Constable):exact * Oop:java/lang/invoke/VarHandleReferences$Array (java/lang/constant/Constable):exact *
> 10 IfFalse === 11 [[ 94 ]] #0 !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 11 rangeCheck_uimm15_iReg === 12 112 [[ 10 75 ]] P=0.000001, C=-1.000000
> 12 Proj === 13 [[ 11 ]] #0 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:7 (line 180)
> 13 Blackhole === 14 57 [[ 12 ]] !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:7 (line 180)
> 14 MachProj === 15 [[ 13 57 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 15 membar_storestore === 16 0 56 0 0 [[ 14 65 ]]
> 16 MachProj === 17 [[ 15 ]] #0/unmatched
> 17 Initialize === 18 0 42 0 0 0 43 [[ 16 56 ]] !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 18 Region === 18 96 95 [[ 18 17 43 58 60 ]] !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 19 CatchProj === 20 [[ 116 ]] #0 at bci -1 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 20 Catch === 21 40 [[ 19 88 ]] !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 21 MachProj === 22 [[ 20 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 22 CallStaticJavaDirect === 98 0 32 34 0 123 111 108 109 0 [[ 23 21 40 44 59 102 ]] Static wrapper for: _new_array_Java # rawptr:NotNull ( java/lang/Object:NotNull *, int ) C=0.000100 TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179) !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 24 IfFalse === 25 [[ 98 ]] #0
> 25 branchCon === 28 26 [[ 41 24 ]] P=0.000100, C=-1.000000
> 26 cmpP_reg_reg === _ 30 27 [[ 25 ]]
> 27 loadP === 28 32 33 [[ 26 ]] rawptr:BotPTR
> 28 MachProj === 29 [[ 25 31 27 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 29 Start === 29 1 [[ 29 28 32 34 38 39 61 66 0 110 111 33 9 8 7 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *, 6:int} !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 30 addP_reg_imm16 === _ 0 31 [[ 26 55 63 ]] rawptr:BotPTR
> 31 loadP === 28 32 33 [[ 30 53 51 50 46 46 58 63 ]] rawptr:BotPTR
> 32 MachProj === 29 [[ 31 27 22 55 42 64 76 89 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 33 tlsLoadP === 29 [[ 31 27 55 ]]
> 34 MachProj === 29 [[ 22 4 2 68 87 ]] #3 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 38 MachProj === 29 [[ 108 ]] #5 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 39 MachProj === 29 [[ 109 ]] #6 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 40 MachProj === 22 [[ 20 87 90 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 41 IfTrue === 25 [[ 99 ]] #1
> 42 MergeMem === _ 0 43 0 0 0 32 [[ 17 ]] { - - - N32:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 43 Phi === 18 44 45 [[ 42 17 ]] #memory Memory: @rawptr:BotPTR, idx=Raw;
> 44 MachProj === 22 [[ 43 89 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 45 inlineCallClearArrayLarge === 99 50 46 48 [[ 47 49 43 ]] #42/0x000000000000002a
> 46 addP_reg_imm16 === _ 31 31 [[ 45 ]] rawptr:BotPTR
> 48 MachTemp === 1 [[ 45 ]]
> 50 storeI === 99 51 31 110 [[ 45 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 51 storeNKlass === 99 53 31 119 [[ 50 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 53 storeL === 99 55 31 54 [[ 51 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 54 loadConL16 === 1 [[ 53 ]] #1/0x0000000000000001
> 55 storeP === 99 32 33 30 [[ 53 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 56 MachProj === 17 [[ 15 ]] #2/unmatched Memory: @rawptr:BotPTR, idx=Raw;
> 57 checkCastPP === 14 58 [[ 13 106 81 81 ]] compiler/gcbarriers/Outer *[int:42] (java/lang/Cloneable,java/io/Serializable):NotNull:exact * !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 58 Phi === 18 59 31 [[ 57 ]] #rawptr:BotPTR !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 59 MachProj === 22 [[ 58 ]] #5 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 60 Phi === 18 61 62 [[ 4 68 ]] #abIO
> 61 MachProj === 29 [[ 60 62 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 62 prefetch_alloc_no_offset === 99 61 63 [[ 60 ]]
> 63 addP_reg_imm16 === _ 31 30 [[ 62 ]] rawptr:BotPTR
> 64 MergeMem === _ 0 32 65 65 65 65 [[ 4 ]] { N65:rawptr:BotPTR N65:java/lang/Object * N65:java/lang/Object+8 * [narrowklass] N65:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 65 MachProj === 15 [[ 64 64 64 64 76 76 76 76 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 66 MachProj === 29 [[ 4 68 87 ]] #4 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:-1 (line 179)
> 68 Ret === 69 60 86 34 66 [[ 1 ]]
> 69 MachProj === 70 [[ 68 ]] #0/unmatched !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 70 MemBarCPUOrder === 71 0 78 0 0 [[ 69 86 ]] !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 71 MachProj === 72 [[ 70 80 ]] #0/unmatched !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 72 MemBarCPUOrder === 73 0 77 0 0 [[ 71 79 ]] !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 73 MachProj === 74 [[ 72 ]] #0/unmatched !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 74 membar_release === 100 0 76 0 0 [[ 73 77 ]] !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 75 IfTrue === 11 [[ 100 ]] #1 !jvms: VarHandleReferences$Array::setVolatile @ bci:32 (line 612) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 76 MergeMem === _ 0 32 65 65 65 65 [[ 74 ]] { N65:rawptr:BotPTR N65:java/lang/Object * N65:java/lang/Object+8 * [narrowklass] N65:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:54 (line 613) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 77 MachProj === 74 [[ 72 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 78 MergeMem === _ 0 79 0 0 0 80 [[ 70 ]] { - - - N80:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 79 MachProj === 72 [[ 78 80 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 80 zStoreP === 71 79 81 113 84 [[ 85 78 ]] memory barrier(strong ) Memory: @compiler/gcbarriers/Outer *[int:42] (java/lang/Cloneable,java/io/Serializable):NotNull:exact+any *, idx=6; !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 81 addP_reg_reg === _ 57 57 82 [[ 80 ]] compiler/gcbarriers/Outer *[int:42] (java/lang/Cloneable,java/io/Serializable):NotNull:exact+any *
> 82 scaledPositiveI2L_lShiftL_convI2L_reg_imm6 === _ 83 [[ 81 ]] #3/0x00000003
> 83 castII === 100 112 [[ 82 ]] int:>=0:www
> 84 MachTemp === 1 [[ 80 ]]
> 86 MachProj === 70 [[ 68 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::setVolatile @ bci:57 (line 611) VarHandleGuards::guard_LIL_V @ bci:50 (line 701) TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:16 (line 181)
> 87 RethrowException === 101 40 89 34 66 90 [[ 1 ]]
> 88 CatchProj === 20 [[ 101 ]] #1 at bci -1 !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 89 MergeMem === _ 0 32 44 [[ 87 ]] { N44:rawptr:BotPTR } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 90 CreateException === 101 40 [[ 87 ]] java/lang/Throwable (java/io/Serializable):NotNull * Oop:java/lang/Throwable (java/io/Serializable):NotNull * !jvms: TestZGCBarrierElision::testAllocateArrayThenStoreAtUnknownIndex @ bci:2 (line 179)
> 94 Region === 94 10 [[ 94 4 ]]
> 95 branch === 99 [[ 18 ]] !orig=93
> 96 branch === 97 [[ 18 ]] !orig=93
> 97 Region === 97 117 [[ 97 96 ]]
> 98 Region === 98 24 [[ 98 22 ]]
> 99 Region === 99 41 [[ 99 95 62 45 50 51 53 55 ]]
> 100 Region === 100 75 [[ 100 74 83 ]]
> 101 Region === 101 88 [[ 101 87 90 ]]
> 106 DebugUseSpillCopy === _ 57 [[ 4 4 ]]
> 107 DebugUseSpillCopy === _ 112 [[ 4 ]]
> 108 DefinitionSpillCopy === _ 38 [[ 22 113 4 ]] Oop:compiler/gcbarriers/Outer *
> 109 DefinitionSpillCopy === _ 39 [[ 22 112 ]]
> 110 loadConI16 === 29 [[ 50 ]] #42/0x0000002a
> 111 loadConI16 === 29 [[ 22 ]] #42/0x0000002a
> 112 MemToRegSpillCopy === _ 109 [[ 11 83 107 ]]
> 113 MemToRegSpillCopy === _ 108 [[ 80 ]] Oop:compiler/gcbarriers/Outer *
> 115 loadConI16 === 1 [[ 4 ]] #-28/0xffffffe4
> 116 Region === 116 19 [[ 116 117 ]]
> 117 branch === 116 [[ 97 ]] !orig=93
> 118 loadConNKlass_hi === _ [[ 119 ]] [288000118]
> 119 loadConNKlass_lo === _ 118 [[ 51 ]] narrowklass: precise [compiler/gcbarriers/Outer: 0x00007ffb080843e8 * (java/lang/Cloneable,java/io/Serializable): :Constant:exact *
> 120 loadToc_hi === _ [[ 121 ]] [288000120]
> 121 loadToc_lo === _ 120 [[ 122 ]]
> 122 loadConP_hi === _ 121 [[ 123 ]] precise [compiler/gcbarriers/Outer: 0x00007ffb080843e8 * (java/lang/Cloneable,java/io/Serializable): :Constant:exact *
> 123 loadConP_lo === _ 122 [[ 22 ]] precise [compiler/gcbarriers/Outer: 0x00007ffb080843e8 * (java/lang/Cloneable,java/io/Serializable): :Constant:exact *
>
> 2) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testAllocateThenLoad()":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 32 [[ ]] #top
> 1 Root === 1 2 76 [[ 1 32 49 63 68 53 ]] inner
> 2 Ret === 3 70 74 37 75 [[ 1 ]]
> 3 Proj === 4 [[ 2 ]] #0 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:23 (line 92)
> 4 Blackhole === 5 67 [[ 3 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:23 (line 92)
> 5 MachProj === 6 [[ 4 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 6 unnecessary_membar_acquire === 7 0 66 0 0 |67 0 [[ 5 74 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 7 MachProj === 8 [[ 6 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 8 membar_volatile === 9 0 65 0 0 [[ 7 66 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 9 Proj === 10 [[ 8 ]] #0 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:16 (line 91)
> 10 Blackhole === 11 62 [[ 9 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:16 (line 91)
> 11 MachProj === 12 [[ 10 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 12 unnecessary_membar_acquire === 13 0 61 0 0 |62 0 [[ 11 65 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 13 MachProj === 14 [[ 12 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 14 membar_volatile === 15 0 59 0 0 [[ 13 61 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 15 Proj === 16 [[ 14 ]] #0 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:9 (line 89)
> 16 Blackhole === 17 56 [[ 15 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:9 (line 89)
> 17 MachProj === 18 [[ 16 56 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 18 membar_storestore === 19 0 55 0 0 [[ 17 60 ]]
> 19 MachProj === 20 [[ 18 ]] #0/unmatched
> 20 Initialize === 21 0 42 0 0 0 43 [[ 19 55 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 21 Region === 21 84 83 [[ 21 20 43 57 70 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 22 CatchProj === 23 [[ 90 ]] #0 at bci -1 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 23 Catch === 24 40 [[ 22 77 ]] !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 24 MachProj === 25 [[ 23 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 25 CallStaticJavaDirect === 86 0 35 37 0 97 0 [[ 26 24 40 44 58 89 ]] Static wrapper for: _new_instance_Java # rawptr:NotNull ( java/lang/Object:NotNull * ) C=0.000100 TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88) !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 27 IfFalse === 28 [[ 86 ]] #0
> 28 branchCon === 31 29 [[ 41 27 ]] P=0.000100, C=-1.000000
> 29 cmpP_reg_reg === _ 33 30 [[ 28 ]]
> 30 loadP === 31 35 36 [[ 29 ]] rawptr:BotPTR
> 31 MachProj === 32 [[ 28 34 30 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:-1 (line 88)
> 32 Start === 32 1 [[ 32 31 35 37 71 75 0 46 36 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address} !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:23 (line 92)
> 33 addP_reg_imm16 === _ 0 34 [[ 29 54 73 ]] rawptr:BotPTR
> 34 loadP === 31 35 36 [[ 33 52 50 48 47 45 57 73 ]] rawptr:BotPTR
> 35 MachProj === 32 [[ 34 30 25 54 42 42 59 78 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:-1 (line 88)
> 36 tlsLoadP === 32 [[ 34 30 54 ]]
> 37 MachProj === 32 [[ 25 2 76 ]] #3 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:-1 (line 88)
> 40 MachProj === 25 [[ 23 76 79 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 41 IfTrue === 28 [[ 87 ]] #1
> 42 MergeMem === _ 0 43 0 0 0 35 35 [[ 20 ]] { - - - N35:compiler/gcbarriers/Outer+16 * N35:compiler/gcbarriers/Outer+24 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 43 Phi === 21 44 45 [[ 42 20 ]] #memory Memory: @rawptr:BotPTR, idx=Raw;
> 44 MachProj === 25 [[ 43 78 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 45 storeL === 87 47 34 46 [[ 43 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 46 loadConL32hi16 === 32 [[ 47 45 ]] #0/0x0000000000000000
> 47 storeL === 87 48 34 46 [[ 45 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 48 storeI === 87 50 34 49 [[ 47 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 49 loadConI16 === 1 [[ 48 ]] #0/0x00000000
> 50 storeNKlass === 87 52 34 93 [[ 48 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 52 storeL === 87 54 34 53 [[ 50 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 53 loadConL16 === 1 [[ 52 ]] #1/0x0000000000000001
> 54 storeP === 87 35 36 33 [[ 52 ]] memory Memory: @rawptr:BotPTR, idx=Raw;
> 55 MachProj === 20 [[ 18 ]] #2/unmatched Memory: @rawptr:BotPTR, idx=Raw;
> 56 checkCastPP === 17 57 [[ 16 62 67 ]] compiler/gcbarriers/Outer:NotNull:exact * Oop:compiler/gcbarriers/Outer:NotNull:exact * !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 57 Phi === 21 58 34 [[ 56 ]] #rawptr:BotPTR !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 58 MachProj === 25 [[ 57 ]] #5 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 59 MergeMem === _ 0 35 60 60 60 60 60 [[ 14 ]] { N60:rawptr:BotPTR N60:java/lang/Object * N60:java/lang/Object+8 * [narrowklass] N60:compiler/gcbarriers/Outer+16 * N60:compiler/gcbarriers/Outer+24 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:4 (line 88)
> 60 MachProj === 18 [[ 59 59 59 59 59 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 61 MachProj === 14 [[ 12 62 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 62 zLoadP_acq === _ 61 56 63 [[ 64 10 12 ]] compiler/gcbarriers/Inner * barrier(elided ) Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 63 MachTemp === 1 [[ 62 ]]
> 65 MachProj === 12 [[ 8 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:13 (line 91)
> 66 MachProj === 8 [[ 6 67 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 67 zLoadP_acq === _ 66 56 68 [[ 69 4 6 ]] compiler/gcbarriers/Inner * barrier(elided ) Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 68 MachTemp === 1 [[ 67 ]]
> 70 Phi === 21 71 72 [[ 2 ]] #abIO
> 71 MachProj === 32 [[ 70 72 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:-1 (line 88)
> 72 prefetch_alloc_no_offset === 87 71 73 [[ 70 ]]
> 73 addP_reg_imm16 === _ 34 33 [[ 72 ]] rawptr:BotPTR
> 74 MachProj === 6 [[ 2 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:20 (line 92)
> 75 MachProj === 32 [[ 2 76 ]] #4 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:-1 (line 88)
> 76 RethrowException === 88 40 78 37 75 79 [[ 1 ]]
> 77 CatchProj === 23 [[ 88 ]] #1 at bci -1 !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 78 MergeMem === _ 0 35 44 [[ 76 ]] { N44:rawptr:BotPTR } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 79 CreateException === 88 40 [[ 76 ]] java/lang/Throwable (java/io/Serializable):NotNull * Oop:java/lang/Throwable (java/io/Serializable):NotNull * !jvms: TestZGCBarrierElision::testAllocateThenLoad @ bci:0 (line 88)
> 83 branch === 87 [[ 21 ]] !orig=82
> 84 branch === 85 [[ 21 ]] !orig=82
> 85 Region === 85 91 [[ 85 84 ]]
> 86 Region === 86 27 [[ 86 25 ]]
> 87 Region === 87 41 [[ 87 83 72 45 47 48 50 52 54 ]]
> 88 Region === 88 77 [[ 88 76 79 ]]
> 90 Region === 90 22 [[ 90 91 ]]
> 91 branch === 90 [[ 85 ]] !orig=82
> 92 loadConNKlass_hi === _ [[ 93 ]] [565300092]
> 93 loadConNKlass_lo === _ 92 [[ 50 ]] narrowklass: precise compiler/gcbarriers/Outer: 0x00007ffb0827d198:Constant:exact *
> 94 loadToc_hi === _ [[ 95 ]] [565300094]
> 95 loadToc_lo === _ 94 [[ 96 ]]
> 96 loadConP_hi === _ 95 [[ 97 ]] precise compiler/gcbarriers/Outer: 0x00007ffb0827d198:Constant:exact *
> 97 loadConP_lo === _ 96 [[ 25 ]] precise compiler/gcbarriers/Outer: 0x00007ffb0827d198:Constant:exact * Klass:precise compiler/gcbarriers/Outer: 0x00007ffb0827d198:Constant:exact *
>
> 3) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testArrayAtomicThenAtomic(compiler.gcbarriers.Outer[],compiler.gcbarriers.Outer)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 10 [[ ]] #top
> 1 Root === 1 2 17 32 [[ 1 10 16 88 68 67 57 56 ]] inner
> 2 ShouldNotReachHere === 3 0 0 14 0 [[ 1 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 4 CallStaticJavaDirect === 75 12 13 14 15 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 [[ 5 3 81 ]] Static wrapper for: uncommon_trap(reason='speculate_null_check' action='maybe_recompile') # void ( int ) C=0.000100 VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363) !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 6 ConP === 10 [[ 4 ]] #NULL
> 7 IfFalse === 79 [[ 77 ]] #0 !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 9 MachProj === 10 [[ 79 29 ]] #0/unmatched !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 10 Start === 10 1 [[ 10 9 11 12 13 14 15 31 0 24 23 22 21 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *[int:>=0] (java/lang/Cloneable,java/io/Serializable) *, 6:compiler/gcbarriers/Outer *} !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 11 MachProj === 10 [[ 66 29 86 85 66 55 55 ]] #5 !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 12 MachProj === 10 [[ 4 19 32 ]] #1/unmatched !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 13 MachProj === 10 [[ 4 29 19 48 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 14 MachProj === 10 [[ 4 2 19 17 32 ]] #3 !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 15 MachProj === 10 [[ 4 19 32 ]] #4 !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 16 loadConI16 === 1 [[ 4 ]] #-162/0xffffff5e
> 17 ShouldNotReachHere === 18 0 0 14 0 [[ 1 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 18 MachProj === 19 [[ 17 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 19 CallStaticJavaDirect === 76 12 13 14 15 88 85 84 0 0 0 0 0 0 0 0 0 0 84 24 86 23 85 22 87 21 [[ 20 18 80 ]] Static wrapper for: uncommon_trap(reason='range_check' action='make_not_entrant') # void ( int ) C=0.000100 VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363) !jvms: VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 21 ConP === 10 [[ 19 ]] #jdk/internal/util/Preconditions$4 (java/util/function/BiFunction):exact * Oop:jdk/internal/util/Preconditions$4 (java/util/function/BiFunction):exact *
> 22 ConI === 10 [[ 19 ]] #int:0
> 23 ConP === 10 [[ 19 ]] #jdk/internal/misc/Unsafe:exact * Oop:jdk/internal/misc/Unsafe:exact *
> 24 ConP === 10 [[ 19 ]] #java/lang/invoke/VarHandleReferences$Array (java/lang/constant/Constable):exact * Oop:java/lang/invoke/VarHandleReferences$Array (java/lang/constant/Constable):exact *
> 25 IfTrue === 26 [[ 76 ]] #1 !jvms: VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 26 branchCon === 77 27 [[ 49 25 ]] P=0.000001, C=-1.000000
> 27 compU_reg_uimm16 === _ 29 [[ 26 ]] #0/0x00000000
> 28 IfTrue === 79 [[ 75 ]] #1 !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 29 loadRange === 9 13 11 [[ 27 87 79 ]] #12/0x000000000000000c !jvms: VarHandleReferences$Array::getAndSet @ bci:28 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 31 MachProj === 10 [[ 84 65 54 ]] #6 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:-1 (line 363)
> 32 Ret === 33 12 71 14 15 [[ 1 ]]
> 33 MachProj === 34 [[ 32 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 34 unnecessary_membar_acquire === 35 0 70 0 0 |65 [[ 33 71 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 35 MachProj === 36 [[ 34 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 36 MemBarCPUOrder === 37 0 62 0 0 [[ 35 70 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 37 MachProj === 38 [[ 36 65 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 38 MemBarCPUOrder === 39 0 61 0 0 [[ 37 63 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 39 MachProj === 40 [[ 38 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 40 membar_volatile === 41 0 60 0 0 [[ 39 61 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 41 MachProj === 42 [[ 40 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 42 unnecessary_membar_acquire === 43 0 59 0 0 |54 [[ 41 60 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 43 MachProj === 44 [[ 42 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 44 MemBarCPUOrder === 45 0 51 0 0 [[ 43 59 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 45 MachProj === 46 [[ 44 54 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 46 MemBarCPUOrder === 47 0 50 0 0 [[ 45 52 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 47 MachProj === 48 [[ 46 ]] #0/unmatched !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 48 membar_volatile === 78 0 13 0 0 [[ 47 50 ]] !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 49 IfFalse === 26 [[ 78 ]] #0 !jvms: VarHandleReferences$Array::getAndSet @ bci:32 (line 735) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 50 MachProj === 48 [[ 46 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 51 MergeMem === _ 0 52 0 53 [[ 44 ]] { - N53:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 52 MachProj === 46 [[ 51 54 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 53 SCMemProj === 54 [[ 51 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 54 zGetAndSetP === 45 52 55 31 56 57 [[ 58 53 42 ]] compiler/gcbarriers/Outer * barrier(strong ) Oop:compiler/gcbarriers/Outer * !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 55 addP_reg_imm16 === _ 11 11 [[ 54 ]] compiler/gcbarriers/Outer *[int:>=0] (java/lang/Cloneable,java/io/Serializable)[0] *
> 56 MachTemp === 1 [[ 54 ]]
> 57 MachTemp === 1 [[ 54 ]]
> 59 MachProj === 44 [[ 42 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 60 MachProj === 42 [[ 40 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:6 (line 363)
> 61 MachProj === 40 [[ 38 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 62 MergeMem === _ 0 63 0 64 [[ 36 ]] { - N64:java/lang/Object *[int:>=0] (java/lang/Cloneable,java/io/Serializable)+any * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 63 MachProj === 38 [[ 62 65 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 64 SCMemProj === 65 [[ 62 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 65 zGetAndSetP === 37 63 66 31 67 68 [[ 69 64 34 ]] compiler/gcbarriers/Outer * barrier(strong ) Oop:compiler/gcbarriers/Outer * !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 66 addP_reg_imm16 === _ 11 11 [[ 65 ]] compiler/gcbarriers/Outer *[int:>=0] (java/lang/Cloneable,java/io/Serializable)[0] *
> 67 MachTemp === 1 [[ 65 ]]
> 68 MachTemp === 1 [[ 65 ]]
> 70 MachProj === 36 [[ 34 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 71 MachProj === 34 [[ 32 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$Array::getAndSet @ bci:57 (line 734) VarHandleGuards::guard_LIL_V @ bci:97 (line 703) TestZGCBarrierElision::testArrayAtomicThenAtomic @ bci:15 (line 364)
> 75 Region === 75 28 [[ 75 4 ]]
> 76 Region === 76 25 [[ 76 19 ]]
> 77 Region === 77 7 [[ 77 26 ]]
> 78 Region === 78 49 [[ 78 48 ]]
> 79 NullCheck === 9 29 [[ 28 7 ]]
> 84 DebugUseSpillCopy === _ 31 [[ 19 19 ]] Oop:compiler/gcbarriers/Outer *
> 85 DebugUseSpillCopy === _ 11 [[ 19 19 ]]
> 86 DebugUseSpillCopy === _ 11 [[ 19 ]]
> 87 DebugUseSpillCopy === _ 29 [[ 19 ]]
> 88 loadConI16 === 1 [[ 19 ]] #-28/0xffffffe4
>
> 4) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenAtomic(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 13 [[ ]] #top
> 1 Root === 1 2 21 [[ 1 13 70 57 56 46 45 ]] inner
> 2 ShouldNotReachHere === 3 0 0 17 0 [[ 1 ]] !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 4 CallStaticJavaDirect === 64 15 16 17 18 70 67 69 0 0 0 0 0 0 0 0 69 9 8 7 6 [[ 5 3 66 ]] Static wrapper for: uncommon_trap(reason='speculate_null_check' action='make_not_entrant') # void ( int ) C=0.000100 Objects::requireNonNull @ bci:1 (line 232) reexecute VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332) !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 6 ConP === 13 [[ 4 ]] #NULL
> 7 ConP === 13 [[ 4 ]] #NULL
> 8 ConP === 13 [[ 4 ]] #jdk/internal/misc/Unsafe:exact * Oop:jdk/internal/misc/Unsafe:exact *
> 9 ConP === 13 [[ 4 ]] #java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact * Oop:java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact *
> 10 IfFalse === 11 [[ 64 ]] #0 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 11 zeroCheckP_reg_imm0 === 12 14 [[ 10 38 ]] P=0.000001, C=-1.000000 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 12 MachProj === 13 [[ 11 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 13 Start === 13 1 [[ 13 12 14 15 16 17 18 20 0 9 8 7 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *, 6:compiler/gcbarriers/Inner *} !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 14 MachProj === 13 [[ 11 67 44 44 55 55 ]] #5 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 15 MachProj === 13 [[ 4 21 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 16 MachProj === 13 [[ 4 37 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 17 MachProj === 13 [[ 4 2 21 ]] #3 !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 18 MachProj === 13 [[ 4 21 ]] #4 !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 20 MachProj === 13 [[ 69 54 43 ]] #6 Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAtomicThenAtomic @ bci:-1 (line 332)
> 21 Ret === 22 15 60 17 18 [[ 1 ]]
> 22 MachProj === 23 [[ 21 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 23 unnecessary_membar_acquire === 24 0 59 0 0 |54 [[ 22 60 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 24 MachProj === 25 [[ 23 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 25 MemBarCPUOrder === 26 0 51 0 0 [[ 24 59 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 26 MachProj === 27 [[ 25 54 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 27 MemBarCPUOrder === 28 0 50 0 0 [[ 26 52 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 28 MachProj === 29 [[ 27 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 29 membar_volatile === 30 0 49 0 0 [[ 28 50 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 30 MachProj === 31 [[ 29 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 31 unnecessary_membar_acquire === 32 0 48 0 0 |43 [[ 30 49 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 32 MachProj === 33 [[ 31 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 33 MemBarCPUOrder === 34 0 40 0 0 [[ 32 48 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 34 MachProj === 35 [[ 33 43 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 35 MemBarCPUOrder === 36 0 39 0 0 [[ 34 41 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 36 MachProj === 37 [[ 35 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 37 membar_volatile === 65 0 16 0 0 [[ 36 39 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 38 IfTrue === 11 [[ 65 ]] #1 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 39 MachProj === 37 [[ 35 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 40 MergeMem === _ 0 41 0 0 42 [[ 33 ]] { - - N42:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 41 MachProj === 35 [[ 40 43 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 42 SCMemProj === 43 [[ 40 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 43 zGetAndSetP === 34 41 44 20 45 46 [[ 47 42 31 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 44 addP_reg_imm16 === _ 14 14 [[ 43 ]] compiler/gcbarriers/Outer+16 * Oop:compiler/gcbarriers/Outer+16 *
> 45 MachTemp === 1 [[ 43 ]]
> 46 MachTemp === 1 [[ 43 ]]
> 48 MachProj === 33 [[ 31 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 49 MachProj === 31 [[ 29 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:5 (line 332)
> 50 MachProj === 29 [[ 27 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 51 MergeMem === _ 0 52 0 0 53 [[ 25 ]] { - - N53:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 52 MachProj === 27 [[ 51 54 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 53 SCMemProj === 54 [[ 51 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 54 zGetAndSetP === 26 52 55 20 56 57 [[ 58 53 23 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 55 addP_reg_imm16 === _ 14 14 [[ 54 ]] compiler/gcbarriers/Outer+16 * Oop:compiler/gcbarriers/Outer+16 *
> 56 MachTemp === 1 [[ 54 ]]
> 57 MachTemp === 1 [[ 54 ]]
> 59 MachProj === 25 [[ 23 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 60 MachProj === 23 [[ 21 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenAtomic @ bci:13 (line 333)
> 64 Region === 64 10 [[ 64 4 ]]
> 65 Region === 65 38 [[ 65 37 ]]
> 67 DebugUseSpillCopy === _ 14 [[ 4 ]] Oop:compiler/gcbarriers/Outer *
> 69 DebugUseSpillCopy === _ 20 [[ 4 4 ]] Oop:compiler/gcbarriers/Inner *
> 70 loadConI16 === 1 [[ 4 ]] #-164/0xffffff5c
>
> 5) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenLoad(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 13 [[ ]] #top
> 1 Root === 1 2 21 [[ 1 13 61 50 44 43 ]] inner
> 2 ShouldNotReachHere === 3 0 0 17 0 [[ 1 ]] !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 4 CallStaticJavaDirect === 56 15 16 17 18 61 59 0 0 0 0 0 0 0 0 0 60 9 8 7 6 [[ 5 3 58 ]] Static wrapper for: uncommon_trap(reason='speculate_null_check' action='make_not_entrant') # void ( int ) C=0.000100 Objects::requireNonNull @ bci:1 (line 232) reexecute VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316) !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 6 ConP === 13 [[ 4 ]] #NULL
> 7 ConP === 13 [[ 4 ]] #NULL
> 8 ConP === 13 [[ 4 ]] #jdk/internal/misc/Unsafe:exact * Oop:jdk/internal/misc/Unsafe:exact *
> 9 ConP === 13 [[ 4 ]] #java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact * Oop:java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact *
> 10 IfFalse === 11 [[ 56 ]] #0 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 11 zeroCheckP_reg_imm0 === 12 14 [[ 10 36 ]] P=0.000001, C=-1.000000 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 12 MachProj === 13 [[ 11 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 13 Start === 13 1 [[ 13 12 14 15 16 17 18 20 0 9 8 7 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *, 6:compiler/gcbarriers/Inner *} !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 14 MachProj === 13 [[ 11 59 42 42 49 ]] #5 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 15 MachProj === 13 [[ 4 21 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 16 MachProj === 13 [[ 4 35 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 17 MachProj === 13 [[ 4 2 21 ]] #3 !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 18 MachProj === 13 [[ 4 21 ]] #4 !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 20 MachProj === 13 [[ 60 41 ]] #6 Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:-1 (line 316)
> 21 Ret === 22 15 52 17 18 [[ 1 ]]
> 22 Proj === 23 [[ 21 ]] #0 !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:12 (line 317)
> 23 Blackhole === 24 49 [[ 22 ]] !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:12 (line 317)
> 24 MachProj === 25 [[ 23 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 25 unnecessary_membar_acquire === 26 0 48 0 0 |49 0 [[ 24 52 ]] !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 26 MachProj === 27 [[ 25 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 27 membar_volatile === 28 0 47 0 0 [[ 26 48 ]] !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 28 MachProj === 29 [[ 27 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 29 unnecessary_membar_acquire === 30 0 46 0 0 |41 [[ 28 47 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 30 MachProj === 31 [[ 29 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 31 MemBarCPUOrder === 32 0 38 0 0 [[ 30 46 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 32 MachProj === 33 [[ 31 41 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 33 MemBarCPUOrder === 34 0 37 0 0 [[ 32 39 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 34 MachProj === 35 [[ 33 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 35 membar_volatile === 57 0 16 0 0 [[ 34 37 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 36 IfTrue === 11 [[ 57 ]] #1 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 37 MachProj === 35 [[ 33 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 38 MergeMem === _ 0 39 0 0 40 [[ 31 ]] { - - N40:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 39 MachProj === 33 [[ 38 41 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 40 SCMemProj === 41 [[ 38 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 41 zGetAndSetP === 32 39 42 20 43 44 [[ 45 40 29 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 42 addP_reg_imm16 === _ 14 14 [[ 41 ]] compiler/gcbarriers/Outer+16 * Oop:compiler/gcbarriers/Outer+16 *
> 43 MachTemp === 1 [[ 41 ]]
> 44 MachTemp === 1 [[ 41 ]]
> 46 MachProj === 31 [[ 29 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 47 MachProj === 29 [[ 27 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenLoad @ bci:5 (line 316)
> 48 MachProj === 27 [[ 25 49 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 49 zLoadP_acq === 57 48 14 50 [[ 51 23 25 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 50 MachTemp === 1 [[ 49 ]]
> 52 MachProj === 25 [[ 21 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenLoad @ bci:9 (line 317)
> 56 Region === 56 10 [[ 56 4 ]]
> 57 Region === 57 36 [[ 57 35 49 ]]
> 59 DebugUseSpillCopy === _ 14 [[ 4 ]] Oop:compiler/gcbarriers/Outer *
> 60 DebugUseSpillCopy === _ 20 [[ 4 ]] Oop:compiler/gcbarriers/Inner *
> 61 loadConI16 === 1 [[ 4 ]] #-164/0xffffff5c
>
> 6) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenStore(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 13 [[ ]] #top
> 1 Root === 1 2 21 [[ 1 13 58 47 40 39 ]] inner
> 2 ShouldNotReachHere === 3 0 0 17 0 [[ 1 ]] !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 4 CallStaticJavaDirect === 52 15 16 17 18 58 55 57 0 0 0 0 0 0 0 0 57 9 8 7 6 [[ 5 3 54 ]] Static wrapper for: uncommon_trap(reason='speculate_null_check' action='make_not_entrant') # void ( int ) C=0.000100 Objects::requireNonNull @ bci:1 (line 232) reexecute VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324) !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 6 ConP === 13 [[ 4 ]] #NULL
> 7 ConP === 13 [[ 4 ]] #NULL
> 8 ConP === 13 [[ 4 ]] #jdk/internal/misc/Unsafe:exact * Oop:jdk/internal/misc/Unsafe:exact *
> 9 ConP === 13 [[ 4 ]] #java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact * Oop:java/lang/invoke/VarHandleReferences$FieldInstanceReadWrite (java/lang/constant/Constable):exact *
> 10 IfFalse === 11 [[ 52 ]] #0 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 11 zeroCheckP_reg_imm0 === 12 14 [[ 10 32 ]] P=0.000001, C=-1.000000 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 12 MachProj === 13 [[ 11 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 13 Start === 13 1 [[ 13 12 14 15 16 17 18 20 0 9 8 7 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *, 6:compiler/gcbarriers/Inner *} !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 14 MachProj === 13 [[ 11 55 38 38 46 ]] #5 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 15 MachProj === 13 [[ 4 21 ]] #1/unmatched !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 16 MachProj === 13 [[ 4 31 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 17 MachProj === 13 [[ 4 2 21 ]] #3 !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 18 MachProj === 13 [[ 4 21 ]] #4 !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 20 MachProj === 13 [[ 57 46 37 ]] #6 Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 21 Ret === 22 15 44 17 18 [[ 1 ]]
> 22 MachProj === 23 [[ 21 46 ]] #0/unmatched !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:10 (line 325)
> 23 membar_release === 24 0 43 0 0 [[ 22 45 ]] !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:10 (line 325)
> 24 MachProj === 25 [[ 23 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 25 unnecessary_membar_acquire === 26 0 42 0 0 |37 [[ 24 43 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 26 MachProj === 27 [[ 25 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 27 MemBarCPUOrder === 28 0 34 0 0 [[ 26 42 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 28 MachProj === 29 [[ 27 37 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 29 MemBarCPUOrder === 30 0 33 0 0 [[ 28 35 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 30 MachProj === 31 [[ 29 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 31 membar_volatile === 53 0 16 0 0 [[ 30 33 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 32 IfTrue === 11 [[ 53 ]] #1 !jvms: Objects::requireNonNull @ bci:1 (line 232) VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 33 MachProj === 31 [[ 29 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 34 MergeMem === _ 0 35 0 0 36 [[ 27 ]] { - - N36:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 35 MachProj === 29 [[ 34 37 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 36 SCMemProj === 37 [[ 34 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 37 zGetAndSetP === 28 35 38 20 39 40 [[ 41 36 25 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 38 addP_reg_imm16 === _ 14 14 [[ 37 ]] compiler/gcbarriers/Outer+16 * Oop:compiler/gcbarriers/Outer+16 *
> 39 MachTemp === 1 [[ 37 ]]
> 40 MachTemp === 1 [[ 37 ]]
> 42 MachProj === 27 [[ 25 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 43 MachProj === 25 [[ 23 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testAtomicThenStore @ bci:5 (line 324)
> 44 MergeMem === _ 0 45 0 0 46 [[ 21 ]] { - - N46:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:-1 (line 324)
> 45 MachProj === 23 [[ 44 46 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:10 (line 325)
> 46 zStoreP === 22 45 14 20 47 [[ 48 44 ]] memory barrier(strong ) Memory: @compiler/gcbarriers/Outer+16 *, name=field1, idx=5; !jvms: TestZGCBarrierElision::testAtomicThenStore @ bci:10 (line 325)
> 47 MachTemp === 1 [[ 46 ]]
> 52 Region === 52 10 [[ 52 4 ]]
> 53 Region === 53 32 [[ 53 31 ]]
> 55 DebugUseSpillCopy === _ 14 [[ 4 ]] Oop:compiler/gcbarriers/Outer *
> 57 DebugUseSpillCopy === _ 20 [[ 4 4 ]] Oop:compiler/gcbarriers/Inner *
> 58 loadConI16 === 1 [[ 4 ]] #-164/0xffffff5c
>
> 7) Compilation of "static void compiler.gcbarriers.TestZGCBarrierElision.testStoreThenAtomic(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)":
>> Phase "Final Code":
> AFTER: FINAL_CODE
> 0 Con === 10 [[ ]] #top
> 1 Root === 1 2 18 [[ 1 10 16 33 41 42 ]] inner
> 2 ShouldNotReachHere === 3 0 0 14 0 [[ 1 ]] !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 3 MachProj === 4 [[ 2 ]] #0/unmatched !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 4 CallStaticJavaDirect === 49 12 13 14 15 16 0 0 6 52 [[ 5 3 51 ]] Static wrapper for: uncommon_trap(reason='null_check' action='maybe_recompile') # void ( int ) C=0.000100 TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308) reexecute !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 6 ConP === 10 [[ 4 ]] #NULL
> 7 IfFalse === 8 [[ 49 ]] #0 !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 8 zeroCheckP_reg_imm0 === 9 11 [[ 7 29 ]] P=0.000001, C=-1.000000 !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 9 MachProj === 10 [[ 8 ]] #0/unmatched !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 10 Start === 10 1 [[ 10 9 11 12 13 14 15 17 0 6 ]] #{0:control, 1:abIO, 2:memory, 3:rawptr:BotPTR, 4:return_address, 5:compiler/gcbarriers/Outer *, 6:compiler/gcbarriers/Inner *} !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 11 MachProj === 10 [[ 8 32 40 40 ]] #5 Oop:compiler/gcbarriers/Outer * !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 12 MachProj === 10 [[ 4 18 ]] #1/unmatched !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 13 MachProj === 10 [[ 4 28 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 14 MachProj === 10 [[ 4 2 18 ]] #3 !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 15 MachProj === 10 [[ 4 18 ]] #4 !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 16 loadConI16 === 1 [[ 4 ]] #-10/0xfffffff6
> 17 MachProj === 10 [[ 52 32 39 ]] #6 Oop:compiler/gcbarriers/Inner * !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:-1 (line 308)
> 18 Ret === 19 12 45 14 15 [[ 1 ]]
> 19 MachProj === 20 [[ 18 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 20 unnecessary_membar_acquire === 21 0 44 0 0 |39 [[ 19 45 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 21 MachProj === 22 [[ 20 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 22 MemBarCPUOrder === 23 0 36 0 0 [[ 21 44 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 23 MachProj === 24 [[ 22 39 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 24 MemBarCPUOrder === 25 0 35 0 0 [[ 23 37 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 25 MachProj === 26 [[ 24 ]] #0/unmatched !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 26 membar_volatile === 27 0 30 0 0 [[ 25 35 ]] !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 27 MachProj === 28 [[ 26 32 ]] #0/unmatched !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 28 membar_release === 50 0 13 0 0 [[ 27 31 ]] !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 29 IfTrue === 8 [[ 50 ]] #1 !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 30 MergeMem === _ 0 31 0 32 [[ 26 ]] { - N32:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:16 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 31 MachProj === 28 [[ 30 32 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 32 zStoreP === 27 31 11 17 33 [[ 34 30 ]] memory barrier(strong ) Memory: @compiler/gcbarriers/Outer+16 *, name=field1, idx=4; !jvms: TestZGCBarrierElision::testStoreThenAtomic @ bci:2 (line 308)
> 33 MachTemp === 1 [[ 32 ]]
> 35 MachProj === 26 [[ 24 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 36 MergeMem === _ 0 37 0 38 [[ 22 ]] { - N38:compiler/gcbarriers/Outer+16 * } Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 37 MachProj === 24 [[ 36 39 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 38 SCMemProj === 39 [[ 36 ]] Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 39 zGetAndSetP === 23 37 40 17 41 42 [[ 43 38 20 ]] compiler/gcbarriers/Inner * barrier(strong ) Oop:compiler/gcbarriers/Inner * !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 40 addP_reg_imm16 === _ 11 11 [[ 39 ]] compiler/gcbarriers/Outer+16 * Oop:compiler/gcbarriers/Outer+16 *
> 41 MachTemp === 1 [[ 39 ]]
> 42 MachTemp === 1 [[ 39 ]]
> 44 MachProj === 22 [[ 20 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 45 MachProj === 20 [[ 18 ]] #2/unmatched Memory: @BotPTR *+bot, idx=Bot; !jvms: VarHandleReferences$FieldInstanceReadWrite::getAndSet @ bci:31 (line 252) VarHandleGuards::guard_LL_V @ bci:88 (line 55) TestZGCBarrierElision::testStoreThenAtomic @ bci:10 (line 309)
> 49 Region === 49 7 [[ 49 4 ]]
> 50 Region === 50 29 [[ 50 28 ]]
> 52 DebugUseSpillCopy === _ 17 [[ 4 ]] Oop:compiler/gcbarriers/Inner *
>
>
> One or more @IR rules failed:
>
> Failed IR Rules (9) of Methods (7)
> ----------------------------------
> 1) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testAllocateArrayThenStoreAtUnknownIndex(compiler.gcbarriers.Outer,int)" - [Failed IR rules: 1]:
> * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_STORE_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}(zStoreP\S*.*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
>
> 2) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testAllocateThenLoad()" - [Failed IR rules: 1]:
> * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_LOAD_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}(zLoadP\S*.*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 2 = 1 [given]
> - Matched nodes (2):
> * 62 zLoadP_acq === _ 61 56 63 [[ 64 10 12 ]] compiler/gcbarriers/Inner * barrier(elided )
> * 67 zLoadP_acq === _ 66 56 68 [[ 69 4 6 ]] compiler/gcbarriers/Inner * barrier(elided )
>
> 3) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testArrayAtomicThenAtomic(compiler.gcbarriers.Outer[],compiler.gcbarriers.Outer)" - [Failed IR rules: 2]:
> * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_GET_AND_SET_P_WITH_BARRIER_FLAG#_", "strong", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}((zXChgP)|(zGetAndSetP\S*).*)+(\s){2}===.*barrier(\s*strong\s*))"
> - Failed comparison: [found] 2 = 1 [given]
> - Matched nodes (2):
> * 54 zGetAndSetP === 45 52 55 31 56 57 [[ 58 53 42 ]] compiler/gcbarriers/Outer * barrier(strong )
> * 65 zGetAndSetP === 37 63 66 31 67 68 [[ 69 64 34 ]] compiler/gcbarriers/Outer * barrier(strong )
> * @IR rule 2: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_GET_AND_SET_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}((zXChgP)|(zGetAndSetP\S*).*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
>
> 4) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenAtomic(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)" - [Failed IR rules: 2]:
> * @IR rule 1: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_GET_AND_SET_P_WITH_BARRIER_FLAG#_", "strong", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}((zXChgP)|(zGetAndSetP\S*).*)+(\s){2}===.*barrier(\s*strong\s*))"
> - Failed comparison: [found] 2 = 1 [given]
> - Matched nodes (2):
> * 43 zGetAndSetP === 34 41 44 20 45 46 [[ 47 42 31 ]] compiler/gcbarriers/Inner * barrier(strong )
> * 54 zGetAndSetP === 26 52 55 20 56 57 [[ 58 53 23 ]] compiler/gcbarriers/Inner * barrier(strong )
> * @IR rule 2: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_GET_AND_SET_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}((zXChgP)|(zGetAndSetP\S*).*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
>
> 5) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenLoad(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)" - [Failed IR rules: 1]:
> * @IR rule 2: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_LOAD_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}(zLoadP\S*.*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
>
> 6) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testAtomicThenStore(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)" - [Failed IR rules: 1]:
> * @IR rule 2: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_STORE_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}(zStoreP\S*.*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
>
> 7) Method "static void compiler.gcbarriers.TestZGCBarrierElision.testStoreThenAtomic(compiler.gcbarriers.Outer,compiler.gcbarriers.Inner)" - [Failed IR rules: 1]:
> * @IR rule 2: "@compiler.lib.ir_framework.IR(applyIfCPUFeatureAnd={}, phase={FINAL_CODE}, applyIfCPUFeatureOr={}, applyIf={}, applyIfCPUFeature={}, counts={"_#C#Z_GET_AND_SET_P_WITH_BARRIER_FLAG#_", "elided", "1"}, failOn={}, applyIfAnd={}, applyIfOr={}, applyIfNot={})"
> > Phase "Final Code":
> - counts: Graph contains wrong number of nodes:
> * Constraint 1: "(\d+(\s){2}((zXChgP)|(zGetAndSetP\S*).*)+(\s){2}===.*barrier(\s*elided\s*))"
> - Failed comparison: [found] 0 = 1 [given]
> - No nodes matched!
Thanks again @TheRealMDoerr. All failures in your results are caused by missing optimizations (due to the limitations in the analysis) and not by correctness issues. Perhaps we could (in a future PR) split the test file into these two categories, and enable the correctness tests on all platforms.
-------------
PR: https://git.openjdk.org/zgc/pull/13
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