java/9 : jdk.internal.vm.compiler/org/graalvm/compiler/phases/common/UseTrappingNullChecksPhase.class

UseTrappingNullChecksPhase
https://openjdk.java.net/
GPLv2 + Classpath Exception
public class org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase extends org.graalvm.compiler.phases.BasePhase<org.graalvm.compiler.phases.tiers.LowTierContext>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase
  super_class: org.graalvm.compiler.phases.BasePhase
{
  private static final org.graalvm.compiler.debug.DebugCounter counterTrappingNullCheck;
    descriptor: Lorg/graalvm/compiler/debug/DebugCounter;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final org.graalvm.compiler.debug.DebugCounter counterTrappingNullCheckUnreached;
    descriptor: Lorg/graalvm/compiler/debug/DebugCounter;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private static final org.graalvm.compiler.debug.DebugCounter counterTrappingNullCheckDynamicDeoptimize;
    descriptor: Lorg/graalvm/compiler/debug/DebugCounter;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  static final boolean $assertionsDisabled;
    descriptor: Z
    flags: (0x1018) ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 54
            ldc Lorg/graalvm/compiler/phases/common/UseTrappingNullChecksPhase;
            invokevirtual java.lang.Class.desiredAssertionStatus:()Z
            ifne 1
            iconst_1
            goto 2
      StackMap locals:
      StackMap stack:
         1: iconst_0
      StackMap locals:
      StackMap stack: int
         2: putstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.$assertionsDisabled:Z
         3: .line 56
            ldc "TrappingNullCheck"
            invokestatic org.graalvm.compiler.debug.Debug.counter:(Ljava/lang/CharSequence;)Lorg/graalvm/compiler/debug/DebugCounter;
            putstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheck:Lorg/graalvm/compiler/debug/DebugCounter;
         4: .line 57
            ldc "TrappingNullCheckUnreached"
            invokestatic org.graalvm.compiler.debug.Debug.counter:(Ljava/lang/CharSequence;)Lorg/graalvm/compiler/debug/DebugCounter;
            putstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheckUnreached:Lorg/graalvm/compiler/debug/DebugCounter;
         5: .line 58
            ldc "TrappingNullCheckDynamicDeoptimize"
            invokestatic org.graalvm.compiler.debug.Debug.counter:(Ljava/lang/CharSequence;)Lorg/graalvm/compiler/debug/DebugCounter;
            putstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheckDynamicDeoptimize:Lorg/graalvm/compiler/debug/DebugCounter;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase this
         0: .line 54
            aload 0 /* this */
            invokespecial org.graalvm.compiler.phases.BasePhase.<init>:()V
            return
        end local 0 // org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/compiler/phases/common/UseTrappingNullChecksPhase;

  protected void run(org.graalvm.compiler.nodes.StructuredGraph, org.graalvm.compiler.phases.tiers.LowTierContext);
    descriptor: (Lorg/graalvm/compiler/nodes/StructuredGraph;Lorg/graalvm/compiler/phases/tiers/LowTierContext;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=4, locals=5, args_size=3
        start local 0 // org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase this
        start local 1 // org.graalvm.compiler.nodes.StructuredGraph graph
        start local 2 // org.graalvm.compiler.phases.tiers.LowTierContext context
         0: .line 62
            aload 2 /* context */
            invokevirtual org.graalvm.compiler.phases.tiers.LowTierContext.getTarget:()Ljdk/vm/ci/code/TargetDescription;
            getfield jdk.vm.ci.code.TargetDescription.implicitNullCheckLimit:I
            ifgt 2
         1: .line 63
            return
         2: .line 65
      StackMap locals:
      StackMap stack:
            getstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.$assertionsDisabled:Z
            ifne 3
            aload 1 /* graph */
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph.getGuardsStage:()Lorg/graalvm/compiler/nodes/StructuredGraph$GuardsStage;
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph$GuardsStage.areFrameStatesAtDeopts:()Z
            ifne 3
            new java.lang.AssertionError
            dup
            invokespecial java.lang.AssertionError.<init>:()V
            athrow
         3: .line 67
      StackMap locals:
      StackMap stack:
            aload 1 /* graph */
            getstatic org.graalvm.compiler.nodes.DeoptimizeNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph.getNodes:(Lorg/graalvm/compiler/graph/NodeClass;)Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.iterator:()Ljava/util/Iterator;
            astore 4
            goto 6
      StackMap locals: org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase org.graalvm.compiler.nodes.StructuredGraph org.graalvm.compiler.phases.tiers.LowTierContext top java.util.Iterator
      StackMap stack:
         4: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.DeoptimizeNode
            astore 3 /* deopt */
        start local 3 // org.graalvm.compiler.nodes.DeoptimizeNode deopt
         5: .line 68
            aload 3 /* deopt */
            aload 3 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DeoptimizeNode.predecessor:()Lorg/graalvm/compiler/graph/Node;
            aload 3 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DeoptimizeNode.reason:()Ljdk/vm/ci/meta/DeoptimizationReason;
            aload 3 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DeoptimizeNode.getSpeculation:()Ljdk/vm/ci/meta/JavaConstant;
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.tryUseTrappingNullCheck:(Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;Ljdk/vm/ci/meta/JavaConstant;)V
        end local 3 // org.graalvm.compiler.nodes.DeoptimizeNode deopt
         6: .line 67
      StackMap locals:
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 4
         7: .line 70
            aload 1 /* graph */
            getstatic org.graalvm.compiler.nodes.DynamicDeoptimizeNode.TYPE:Lorg/graalvm/compiler/graph/NodeClass;
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph.getNodes:(Lorg/graalvm/compiler/graph/NodeClass;)Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.iterator:()Ljava/util/Iterator;
            astore 4
            goto 10
      StackMap locals:
      StackMap stack:
         8: aload 4
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.DynamicDeoptimizeNode
            astore 3 /* deopt */
        start local 3 // org.graalvm.compiler.nodes.DynamicDeoptimizeNode deopt
         9: .line 71
            aload 2 /* context */
            invokevirtual org.graalvm.compiler.phases.tiers.LowTierContext.getMetaAccess:()Ljdk/vm/ci/meta/MetaAccessProvider;
            aload 3 /* deopt */
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.tryUseTrappingNullCheck:(Ljdk/vm/ci/meta/MetaAccessProvider;Lorg/graalvm/compiler/nodes/DynamicDeoptimizeNode;)V
        end local 3 // org.graalvm.compiler.nodes.DynamicDeoptimizeNode deopt
        10: .line 70
      StackMap locals:
      StackMap stack:
            aload 4
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 8
        11: .line 73
            return
        end local 2 // org.graalvm.compiler.phases.tiers.LowTierContext context
        end local 1 // org.graalvm.compiler.nodes.StructuredGraph graph
        end local 0 // org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0   12     0     this  Lorg/graalvm/compiler/phases/common/UseTrappingNullChecksPhase;
            0   12     1    graph  Lorg/graalvm/compiler/nodes/StructuredGraph;
            0   12     2  context  Lorg/graalvm/compiler/phases/tiers/LowTierContext;
            5    6     3    deopt  Lorg/graalvm/compiler/nodes/DeoptimizeNode;
            9   10     3    deopt  Lorg/graalvm/compiler/nodes/DynamicDeoptimizeNode;
    MethodParameters:
         Name  Flags
      graph    
      context  

  private static void tryUseTrappingNullCheck(jdk.vm.ci.meta.MetaAccessProvider, org.graalvm.compiler.nodes.DynamicDeoptimizeNode);
    descriptor: (Ljdk/vm/ci/meta/MetaAccessProvider;Lorg/graalvm/compiler/nodes/DynamicDeoptimizeNode;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=17, args_size=2
        start local 0 // jdk.vm.ci.meta.MetaAccessProvider metaAccessProvider
        start local 1 // org.graalvm.compiler.nodes.DynamicDeoptimizeNode deopt
         0: .line 76
            aload 1 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DynamicDeoptimizeNode.predecessor:()Lorg/graalvm/compiler/graph/Node;
            astore 2 /* predecessor */
        start local 2 // org.graalvm.compiler.graph.Node predecessor
         1: .line 77
            aload 2 /* predecessor */
            instanceof org.graalvm.compiler.nodes.AbstractMergeNode
            ifeq 41
         2: .line 78
            aload 2 /* predecessor */
            checkcast org.graalvm.compiler.nodes.AbstractMergeNode
            astore 3 /* merge */
        start local 3 // org.graalvm.compiler.nodes.AbstractMergeNode merge
         3: .line 82
            aload 1 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DynamicDeoptimizeNode.getActionAndReason:()Lorg/graalvm/compiler/nodes/ValueNode;
            astore 4 /* reason */
        start local 4 // org.graalvm.compiler.nodes.ValueNode reason
         4: .line 83
            aconst_null
            astore 5 /* reasonPhi */
        start local 5 // org.graalvm.compiler.nodes.ValuePhiNode reasonPhi
         5: .line 84
            aconst_null
            astore 6 /* reasons */
        start local 6 // java.util.List reasons
         6: .line 85
            iconst_0
            istore 7 /* expectedPhis */
        start local 7 // int expectedPhis
         7: .line 87
            aload 4 /* reason */
            instanceof org.graalvm.compiler.nodes.ValuePhiNode
            ifeq 14
         8: .line 88
            aload 4 /* reason */
            checkcast org.graalvm.compiler.nodes.ValuePhiNode
            astore 5 /* reasonPhi */
         9: .line 89
            aload 5 /* reasonPhi */
            invokevirtual org.graalvm.compiler.nodes.ValuePhiNode.merge:()Lorg/graalvm/compiler/nodes/AbstractMergeNode;
            aload 3 /* merge */
            if_acmpeq 11
        10: .line 90
            return
        11: .line 92
      StackMap locals: jdk.vm.ci.meta.MetaAccessProvider org.graalvm.compiler.nodes.DynamicDeoptimizeNode org.graalvm.compiler.graph.Node org.graalvm.compiler.nodes.AbstractMergeNode org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int
      StackMap stack:
            aload 5 /* reasonPhi */
            invokevirtual org.graalvm.compiler.nodes.ValuePhiNode.values:()Lorg/graalvm/compiler/graph/NodeInputList;
            invokevirtual org.graalvm.compiler.graph.NodeInputList.snapshot:()Ljava/util/List;
            astore 6 /* reasons */
        12: .line 93
            iinc 7 /* expectedPhis */ 1
        13: .line 94
            goto 16
      StackMap locals:
      StackMap stack:
        14: aload 4 /* reason */
            invokevirtual org.graalvm.compiler.nodes.ValueNode.isConstant:()Z
            ifne 16
        15: .line 95
            return
        16: .line 98
      StackMap locals:
      StackMap stack:
            aload 1 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.DynamicDeoptimizeNode.getSpeculation:()Lorg/graalvm/compiler/nodes/ValueNode;
            astore 8 /* speculation */
        start local 8 // org.graalvm.compiler.nodes.ValueNode speculation
        17: .line 99
            aconst_null
            astore 9 /* speculationPhi */
        start local 9 // org.graalvm.compiler.nodes.ValuePhiNode speculationPhi
        18: .line 100
            aconst_null
            astore 10 /* speculations */
        start local 10 // java.util.List speculations
        19: .line 101
            aload 8 /* speculation */
            instanceof org.graalvm.compiler.nodes.ValuePhiNode
            ifeq 25
        20: .line 102
            aload 8 /* speculation */
            checkcast org.graalvm.compiler.nodes.ValuePhiNode
            astore 9 /* speculationPhi */
        21: .line 103
            aload 9 /* speculationPhi */
            invokevirtual org.graalvm.compiler.nodes.ValuePhiNode.merge:()Lorg/graalvm/compiler/nodes/AbstractMergeNode;
            aload 3 /* merge */
            if_acmpeq 23
        22: .line 104
            return
        23: .line 106
      StackMap locals: org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List
      StackMap stack:
            aload 9 /* speculationPhi */
            invokevirtual org.graalvm.compiler.nodes.ValuePhiNode.values:()Lorg/graalvm/compiler/graph/NodeInputList;
            invokevirtual org.graalvm.compiler.graph.NodeInputList.snapshot:()Ljava/util/List;
            astore 10 /* speculations */
        24: .line 107
            iinc 7 /* expectedPhis */ 1
        25: .line 110
      StackMap locals:
      StackMap stack:
            aload 3 /* merge */
            invokevirtual org.graalvm.compiler.nodes.AbstractMergeNode.phis:()Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.count:()I
            iload 7 /* expectedPhis */
            if_icmpeq 27
        26: .line 111
            return
        27: .line 114
      StackMap locals:
      StackMap stack:
            iconst_0
            istore 11 /* index */
        start local 11 // int index
        28: .line 115
            aload 3 /* merge */
            invokevirtual org.graalvm.compiler.nodes.AbstractMergeNode.cfgPredecessors:()Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.snapshot:()Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 13
            goto 40
      StackMap locals: jdk.vm.ci.meta.MetaAccessProvider org.graalvm.compiler.nodes.DynamicDeoptimizeNode org.graalvm.compiler.graph.Node org.graalvm.compiler.nodes.AbstractMergeNode org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int top java.util.Iterator
      StackMap stack:
        29: aload 13
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.AbstractEndNode
            astore 12 /* end */
        start local 12 // org.graalvm.compiler.nodes.AbstractEndNode end
        30: .line 116
            aload 6 /* reasons */
            ifnull 31
            aload 6 /* reasons */
            iload 11 /* index */
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.ValueNode
            goto 32
      StackMap locals: jdk.vm.ci.meta.MetaAccessProvider org.graalvm.compiler.nodes.DynamicDeoptimizeNode org.graalvm.compiler.graph.Node org.graalvm.compiler.nodes.AbstractMergeNode org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int org.graalvm.compiler.nodes.AbstractEndNode java.util.Iterator
      StackMap stack:
        31: aload 4 /* reason */
      StackMap locals:
      StackMap stack: org.graalvm.compiler.nodes.ValueNode
        32: astore 14 /* thisReason */
        start local 14 // org.graalvm.compiler.nodes.ValueNode thisReason
        33: .line 117
            aload 10 /* speculations */
            ifnull 34
            aload 10 /* speculations */
            iload 11 /* index */
            iinc 11 /* index */ 1
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.ValueNode
            goto 35
      StackMap locals: org.graalvm.compiler.nodes.ValueNode
      StackMap stack:
        34: aload 8 /* speculation */
      StackMap locals:
      StackMap stack: org.graalvm.compiler.nodes.ValueNode
        35: astore 15 /* thisSpeculation */
        start local 15 // org.graalvm.compiler.nodes.ValueNode thisSpeculation
        36: .line 118
            aload 14 /* thisReason */
            invokevirtual org.graalvm.compiler.nodes.ValueNode.isConstant:()Z
            ifeq 40
            aload 15 /* thisSpeculation */
            invokevirtual org.graalvm.compiler.nodes.ValueNode.isConstant:()Z
            ifeq 40
            aload 15 /* thisSpeculation */
            invokevirtual org.graalvm.compiler.nodes.ValueNode.asConstant:()Ljdk/vm/ci/meta/Constant;
            getstatic jdk.vm.ci.meta.JavaConstant.NULL_POINTER:Ljdk/vm/ci/meta/JavaConstant;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifne 38
        37: .line 119
            goto 40
        38: .line 121
      StackMap locals: org.graalvm.compiler.nodes.ValueNode
      StackMap stack:
            aload 0 /* metaAccessProvider */
            aload 14 /* thisReason */
            invokevirtual org.graalvm.compiler.nodes.ValueNode.asJavaConstant:()Ljdk/vm/ci/meta/JavaConstant;
            invokeinterface jdk.vm.ci.meta.MetaAccessProvider.decodeDeoptReason:(Ljdk/vm/ci/meta/JavaConstant;)Ljdk/vm/ci/meta/DeoptimizationReason;
            astore 16 /* deoptimizationReason */
        start local 16 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        39: .line 122
            aload 1 /* deopt */
            aload 12 /* end */
            invokevirtual org.graalvm.compiler.nodes.AbstractEndNode.predecessor:()Lorg/graalvm/compiler/graph/Node;
            aload 16 /* deoptimizationReason */
            aconst_null
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.tryUseTrappingNullCheck:(Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;Ljdk/vm/ci/meta/JavaConstant;)V
        end local 16 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        end local 15 // org.graalvm.compiler.nodes.ValueNode thisSpeculation
        end local 14 // org.graalvm.compiler.nodes.ValueNode thisReason
        end local 12 // org.graalvm.compiler.nodes.AbstractEndNode end
        40: .line 115
      StackMap locals: jdk.vm.ci.meta.MetaAccessProvider org.graalvm.compiler.nodes.DynamicDeoptimizeNode org.graalvm.compiler.graph.Node org.graalvm.compiler.nodes.AbstractMergeNode org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int org.graalvm.compiler.nodes.ValueNode org.graalvm.compiler.nodes.ValuePhiNode java.util.List int top java.util.Iterator
      StackMap stack:
            aload 13
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 29
        end local 11 // int index
        end local 10 // java.util.List speculations
        end local 9 // org.graalvm.compiler.nodes.ValuePhiNode speculationPhi
        end local 8 // org.graalvm.compiler.nodes.ValueNode speculation
        end local 7 // int expectedPhis
        end local 6 // java.util.List reasons
        end local 5 // org.graalvm.compiler.nodes.ValuePhiNode reasonPhi
        end local 4 // org.graalvm.compiler.nodes.ValueNode reason
        end local 3 // org.graalvm.compiler.nodes.AbstractMergeNode merge
        41: .line 125
      StackMap locals: jdk.vm.ci.meta.MetaAccessProvider org.graalvm.compiler.nodes.DynamicDeoptimizeNode org.graalvm.compiler.graph.Node
      StackMap stack:
            return
        end local 2 // org.graalvm.compiler.graph.Node predecessor
        end local 1 // org.graalvm.compiler.nodes.DynamicDeoptimizeNode deopt
        end local 0 // jdk.vm.ci.meta.MetaAccessProvider metaAccessProvider
      LocalVariableTable:
        Start  End  Slot                  Name  Signature
            0   42     0    metaAccessProvider  Ljdk/vm/ci/meta/MetaAccessProvider;
            0   42     1                 deopt  Lorg/graalvm/compiler/nodes/DynamicDeoptimizeNode;
            1   42     2           predecessor  Lorg/graalvm/compiler/graph/Node;
            3   41     3                 merge  Lorg/graalvm/compiler/nodes/AbstractMergeNode;
            4   41     4                reason  Lorg/graalvm/compiler/nodes/ValueNode;
            5   41     5             reasonPhi  Lorg/graalvm/compiler/nodes/ValuePhiNode;
            6   41     6               reasons  Ljava/util/List<Lorg/graalvm/compiler/nodes/ValueNode;>;
            7   41     7          expectedPhis  I
           17   41     8           speculation  Lorg/graalvm/compiler/nodes/ValueNode;
           18   41     9        speculationPhi  Lorg/graalvm/compiler/nodes/ValuePhiNode;
           19   41    10          speculations  Ljava/util/List<Lorg/graalvm/compiler/nodes/ValueNode;>;
           28   41    11                 index  I
           30   40    12                   end  Lorg/graalvm/compiler/nodes/AbstractEndNode;
           33   40    14            thisReason  Lorg/graalvm/compiler/nodes/ValueNode;
           36   40    15       thisSpeculation  Lorg/graalvm/compiler/nodes/ValueNode;
           39   40    16  deoptimizationReason  Ljdk/vm/ci/meta/DeoptimizationReason;
    MethodParameters:
                    Name  Flags
      metaAccessProvider  
      deopt               

  private static void tryUseTrappingNullCheck(org.graalvm.compiler.nodes.AbstractDeoptimizeNode, org.graalvm.compiler.graph.Node, jdk.vm.ci.meta.DeoptimizationReason, jdk.vm.ci.meta.JavaConstant);
    descriptor: (Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;Ljdk/vm/ci/meta/JavaConstant;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=3, locals=7, args_size=4
        start local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
        start local 1 // org.graalvm.compiler.graph.Node predecessor
        start local 2 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        start local 3 // jdk.vm.ci.meta.JavaConstant speculation
         0: .line 128
            aload 2 /* deoptimizationReason */
            getstatic jdk.vm.ci.meta.DeoptimizationReason.NullCheckException:Ljdk/vm/ci/meta/DeoptimizationReason;
            if_acmpeq 2
            aload 2 /* deoptimizationReason */
            getstatic jdk.vm.ci.meta.DeoptimizationReason.UnreachedCode:Ljdk/vm/ci/meta/DeoptimizationReason;
            if_acmpeq 2
         1: .line 129
            return
         2: .line 131
      StackMap locals:
      StackMap stack:
            aload 3 /* speculation */
            ifnull 4
            aload 3 /* speculation */
            getstatic jdk.vm.ci.meta.JavaConstant.NULL_POINTER:Ljdk/vm/ci/meta/JavaConstant;
            invokevirtual java.lang.Object.equals:(Ljava/lang/Object;)Z
            ifne 4
         3: .line 132
            return
         4: .line 134
      StackMap locals:
      StackMap stack:
            aload 1 /* predecessor */
            instanceof org.graalvm.compiler.nodes.AbstractMergeNode
            ifeq 12
         5: .line 135
            aload 1 /* predecessor */
            checkcast org.graalvm.compiler.nodes.AbstractMergeNode
            astore 4 /* merge */
        start local 4 // org.graalvm.compiler.nodes.AbstractMergeNode merge
         6: .line 136
            aload 4 /* merge */
            invokevirtual org.graalvm.compiler.nodes.AbstractMergeNode.phis:()Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.isEmpty:()Z
            ifeq 14
         7: .line 137
            aload 4 /* merge */
            invokevirtual org.graalvm.compiler.nodes.AbstractMergeNode.cfgPredecessors:()Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.snapshot:()Ljava/util/List;
            invokeinterface java.util.List.iterator:()Ljava/util/Iterator;
            astore 6
            goto 10
      StackMap locals: org.graalvm.compiler.nodes.AbstractDeoptimizeNode org.graalvm.compiler.graph.Node jdk.vm.ci.meta.DeoptimizationReason jdk.vm.ci.meta.JavaConstant org.graalvm.compiler.nodes.AbstractMergeNode top java.util.Iterator
      StackMap stack:
         8: aload 6
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            checkcast org.graalvm.compiler.nodes.AbstractEndNode
            astore 5 /* end */
        start local 5 // org.graalvm.compiler.nodes.AbstractEndNode end
         9: .line 138
            aload 0 /* deopt */
            aload 5 /* end */
            invokevirtual org.graalvm.compiler.nodes.AbstractEndNode.predecessor:()Lorg/graalvm/compiler/graph/Node;
            aload 2 /* deoptimizationReason */
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.checkPredecessor:(Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;)V
        end local 5 // org.graalvm.compiler.nodes.AbstractEndNode end
        10: .line 137
      StackMap locals:
      StackMap stack:
            aload 6
            invokeinterface java.util.Iterator.hasNext:()Z
            ifne 8
        end local 4 // org.graalvm.compiler.nodes.AbstractMergeNode merge
        11: .line 141
            goto 14
      StackMap locals: org.graalvm.compiler.nodes.AbstractDeoptimizeNode org.graalvm.compiler.graph.Node jdk.vm.ci.meta.DeoptimizationReason jdk.vm.ci.meta.JavaConstant
      StackMap stack:
        12: aload 1 /* predecessor */
            instanceof org.graalvm.compiler.nodes.AbstractBeginNode
            ifeq 14
        13: .line 142
            aload 0 /* deopt */
            aload 1 /* predecessor */
            aload 2 /* deoptimizationReason */
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.checkPredecessor:(Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;)V
        14: .line 144
      StackMap locals:
      StackMap stack:
            return
        end local 3 // jdk.vm.ci.meta.JavaConstant speculation
        end local 2 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        end local 1 // org.graalvm.compiler.graph.Node predecessor
        end local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
      LocalVariableTable:
        Start  End  Slot                  Name  Signature
            0   15     0                 deopt  Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;
            0   15     1           predecessor  Lorg/graalvm/compiler/graph/Node;
            0   15     2  deoptimizationReason  Ljdk/vm/ci/meta/DeoptimizationReason;
            0   15     3           speculation  Ljdk/vm/ci/meta/JavaConstant;
            6   11     4                 merge  Lorg/graalvm/compiler/nodes/AbstractMergeNode;
            9   10     5                   end  Lorg/graalvm/compiler/nodes/AbstractEndNode;
    MethodParameters:
                      Name  Flags
      deopt                 
      predecessor           
      deoptimizationReason  
      speculation           

  private static void checkPredecessor(org.graalvm.compiler.nodes.AbstractDeoptimizeNode, org.graalvm.compiler.graph.Node, jdk.vm.ci.meta.DeoptimizationReason);
    descriptor: (Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/graph/Node;Ljdk/vm/ci/meta/DeoptimizationReason;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=7, args_size=3
        start local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
        start local 1 // org.graalvm.compiler.graph.Node predecessor
        start local 2 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
         0: .line 147
            aload 1 /* predecessor */
            astore 3 /* current */
        start local 3 // org.graalvm.compiler.graph.Node current
         1: .line 148
            aconst_null
            astore 4 /* branch */
        start local 4 // org.graalvm.compiler.nodes.AbstractBeginNode branch
         2: .line 149
            goto 7
         3: .line 150
      StackMap locals: org.graalvm.compiler.graph.Node org.graalvm.compiler.nodes.AbstractBeginNode
      StackMap stack:
            aload 3 /* current */
            checkcast org.graalvm.compiler.nodes.AbstractBeginNode
            astore 4 /* branch */
         4: .line 151
            aload 4 /* branch */
            invokevirtual org.graalvm.compiler.nodes.AbstractBeginNode.anchored:()Lorg/graalvm/compiler/graph/iterators/NodeIterable;
            invokeinterface org.graalvm.compiler.graph.iterators.NodeIterable.isNotEmpty:()Z
            ifeq 6
         5: .line 153
            return
         6: .line 155
      StackMap locals:
      StackMap stack:
            aload 3 /* current */
            invokevirtual org.graalvm.compiler.graph.Node.predecessor:()Lorg/graalvm/compiler/graph/Node;
            astore 3 /* current */
         7: .line 149
      StackMap locals:
      StackMap stack:
            aload 3 /* current */
            instanceof org.graalvm.compiler.nodes.AbstractBeginNode
            ifne 3
         8: .line 157
            aload 3 /* current */
            instanceof org.graalvm.compiler.nodes.IfNode
            ifeq 15
         9: .line 158
            aload 3 /* current */
            checkcast org.graalvm.compiler.nodes.IfNode
            astore 5 /* ifNode */
        start local 5 // org.graalvm.compiler.nodes.IfNode ifNode
        10: .line 159
            aload 4 /* branch */
            aload 5 /* ifNode */
            invokevirtual org.graalvm.compiler.nodes.IfNode.trueSuccessor:()Lorg/graalvm/compiler/nodes/AbstractBeginNode;
            if_acmpeq 12
        11: .line 160
            return
        12: .line 162
      StackMap locals: org.graalvm.compiler.nodes.IfNode
      StackMap stack:
            aload 5 /* ifNode */
            invokevirtual org.graalvm.compiler.nodes.IfNode.condition:()Lorg/graalvm/compiler/nodes/LogicNode;
            astore 6 /* condition */
        start local 6 // org.graalvm.compiler.nodes.LogicNode condition
        13: .line 163
            aload 6 /* condition */
            instanceof org.graalvm.compiler.nodes.calc.IsNullNode
            ifeq 15
        14: .line 164
            aload 0 /* deopt */
            aload 5 /* ifNode */
            aload 6 /* condition */
            aload 2 /* deoptimizationReason */
            invokestatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.replaceWithTrappingNullCheck:(Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/nodes/IfNode;Lorg/graalvm/compiler/nodes/LogicNode;Ljdk/vm/ci/meta/DeoptimizationReason;)V
        end local 6 // org.graalvm.compiler.nodes.LogicNode condition
        end local 5 // org.graalvm.compiler.nodes.IfNode ifNode
        15: .line 167
      StackMap locals:
      StackMap stack:
            return
        end local 4 // org.graalvm.compiler.nodes.AbstractBeginNode branch
        end local 3 // org.graalvm.compiler.graph.Node current
        end local 2 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        end local 1 // org.graalvm.compiler.graph.Node predecessor
        end local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
      LocalVariableTable:
        Start  End  Slot                  Name  Signature
            0   16     0                 deopt  Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;
            0   16     1           predecessor  Lorg/graalvm/compiler/graph/Node;
            0   16     2  deoptimizationReason  Ljdk/vm/ci/meta/DeoptimizationReason;
            1   16     3               current  Lorg/graalvm/compiler/graph/Node;
            2   16     4                branch  Lorg/graalvm/compiler/nodes/AbstractBeginNode;
           10   15     5                ifNode  Lorg/graalvm/compiler/nodes/IfNode;
           13   15     6             condition  Lorg/graalvm/compiler/nodes/LogicNode;
    MethodParameters:
                      Name  Flags
      deopt                 
      predecessor           
      deoptimizationReason  

  private static void replaceWithTrappingNullCheck(org.graalvm.compiler.nodes.AbstractDeoptimizeNode, org.graalvm.compiler.nodes.IfNode, org.graalvm.compiler.nodes.LogicNode, jdk.vm.ci.meta.DeoptimizationReason);
    descriptor: (Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;Lorg/graalvm/compiler/nodes/IfNode;Lorg/graalvm/compiler/nodes/LogicNode;Ljdk/vm/ci/meta/DeoptimizationReason;)V
    flags: (0x000a) ACC_PRIVATE, ACC_STATIC
    Code:
      stack=4, locals=9, args_size=4
        start local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
        start local 1 // org.graalvm.compiler.nodes.IfNode ifNode
        start local 2 // org.graalvm.compiler.nodes.LogicNode condition
        start local 3 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
         0: .line 170
            getstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheck:Lorg/graalvm/compiler/debug/DebugCounter;
            invokeinterface org.graalvm.compiler.debug.DebugCounter.increment:()V
         1: .line 171
            aload 0 /* deopt */
            instanceof org.graalvm.compiler.nodes.DynamicDeoptimizeNode
            ifeq 3
         2: .line 172
            getstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheckDynamicDeoptimize:Lorg/graalvm/compiler/debug/DebugCounter;
            invokeinterface org.graalvm.compiler.debug.DebugCounter.increment:()V
         3: .line 174
      StackMap locals:
      StackMap stack:
            aload 3 /* deoptimizationReason */
            getstatic jdk.vm.ci.meta.DeoptimizationReason.UnreachedCode:Ljdk/vm/ci/meta/DeoptimizationReason;
            if_acmpne 5
         4: .line 175
            getstatic org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.counterTrappingNullCheckUnreached:Lorg/graalvm/compiler/debug/DebugCounter;
            invokeinterface org.graalvm.compiler.debug.DebugCounter.increment:()V
         5: .line 177
      StackMap locals:
      StackMap stack:
            aload 2 /* condition */
            checkcast org.graalvm.compiler.nodes.calc.IsNullNode
            astore 4 /* isNullNode */
        start local 4 // org.graalvm.compiler.nodes.calc.IsNullNode isNullNode
         6: .line 178
            aload 1 /* ifNode */
            invokevirtual org.graalvm.compiler.nodes.IfNode.falseSuccessor:()Lorg/graalvm/compiler/nodes/AbstractBeginNode;
            astore 5 /* nonTrappingContinuation */
        start local 5 // org.graalvm.compiler.nodes.AbstractBeginNode nonTrappingContinuation
         7: .line 179
            aload 1 /* ifNode */
            invokevirtual org.graalvm.compiler.nodes.IfNode.trueSuccessor:()Lorg/graalvm/compiler/nodes/AbstractBeginNode;
            astore 6 /* trappingContinuation */
        start local 6 // org.graalvm.compiler.nodes.AbstractBeginNode trappingContinuation
         8: .line 180
            aload 0 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.AbstractDeoptimizeNode.graph:()Lorg/graalvm/compiler/nodes/StructuredGraph;
            new org.graalvm.compiler.nodes.extended.NullCheckNode
            dup
            aload 4 /* isNullNode */
            invokevirtual org.graalvm.compiler.nodes.calc.IsNullNode.getValue:()Lorg/graalvm/compiler/nodes/ValueNode;
            invokespecial org.graalvm.compiler.nodes.extended.NullCheckNode.<init>:(Lorg/graalvm/compiler/nodes/ValueNode;)V
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph.add:(Lorg/graalvm/compiler/graph/Node;)Lorg/graalvm/compiler/graph/Node;
            checkcast org.graalvm.compiler.nodes.extended.NullCheckNode
            astore 7 /* trappingNullCheck */
        start local 7 // org.graalvm.compiler.nodes.extended.NullCheckNode trappingNullCheck
         9: .line 181
            aload 7 /* trappingNullCheck */
            aload 0 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.AbstractDeoptimizeNode.stateBefore:()Lorg/graalvm/compiler/nodes/FrameState;
            invokevirtual org.graalvm.compiler.nodes.extended.NullCheckNode.setStateBefore:(Lorg/graalvm/compiler/nodes/FrameState;)V
        10: .line 182
            aload 0 /* deopt */
            invokevirtual org.graalvm.compiler.nodes.AbstractDeoptimizeNode.graph:()Lorg/graalvm/compiler/nodes/StructuredGraph;
            aload 1 /* ifNode */
            aload 7 /* trappingNullCheck */
            aload 5 /* nonTrappingContinuation */
            invokevirtual org.graalvm.compiler.nodes.StructuredGraph.replaceSplit:(Lorg/graalvm/compiler/nodes/ControlSplitNode;Lorg/graalvm/compiler/graph/Node;Lorg/graalvm/compiler/nodes/AbstractBeginNode;)V
        11: .line 189
            aload 5 /* nonTrappingContinuation */
            getstatic org.graalvm.compiler.nodeinfo.InputType.Guard:Lorg/graalvm/compiler/nodeinfo/InputType;
            aload 7 /* trappingNullCheck */
            invokevirtual org.graalvm.compiler.nodes.AbstractBeginNode.replaceAtUsages:(Lorg/graalvm/compiler/nodeinfo/InputType;Lorg/graalvm/compiler/graph/Node;)V
        12: .line 190
            aload 5 /* nonTrappingContinuation */
            instanceof org.graalvm.compiler.nodes.BeginNode
            ifeq 18
        13: .line 191
            aload 5 /* nonTrappingContinuation */
            invokevirtual org.graalvm.compiler.nodes.AbstractBeginNode.next:()Lorg/graalvm/compiler/nodes/FixedNode;
            astore 8 /* next */
        start local 8 // org.graalvm.compiler.nodes.FixedNode next
        14: .line 192
            aload 5 /* nonTrappingContinuation */
            invokevirtual org.graalvm.compiler.nodes.AbstractBeginNode.clearSuccessors:()V
        15: .line 193
            aload 7 /* trappingNullCheck */
            aload 8 /* next */
            invokevirtual org.graalvm.compiler.nodes.extended.NullCheckNode.setNext:(Lorg/graalvm/compiler/nodes/FixedNode;)V
        16: .line 194
            aload 5 /* nonTrappingContinuation */
            invokevirtual org.graalvm.compiler.nodes.AbstractBeginNode.safeDelete:()V
        end local 8 // org.graalvm.compiler.nodes.FixedNode next
        17: .line 195
            goto 19
        18: .line 196
      StackMap locals: org.graalvm.compiler.nodes.AbstractDeoptimizeNode org.graalvm.compiler.nodes.IfNode org.graalvm.compiler.nodes.LogicNode jdk.vm.ci.meta.DeoptimizationReason org.graalvm.compiler.nodes.calc.IsNullNode org.graalvm.compiler.nodes.AbstractBeginNode org.graalvm.compiler.nodes.AbstractBeginNode org.graalvm.compiler.nodes.extended.NullCheckNode
      StackMap stack:
            aload 7 /* trappingNullCheck */
            aload 5 /* nonTrappingContinuation */
            invokevirtual org.graalvm.compiler.nodes.extended.NullCheckNode.setNext:(Lorg/graalvm/compiler/nodes/FixedNode;)V
        19: .line 199
      StackMap locals:
      StackMap stack:
            aload 6 /* trappingContinuation */
            invokestatic org.graalvm.compiler.nodes.util.GraphUtil.killCFG:(Lorg/graalvm/compiler/nodes/FixedNode;)V
        20: .line 200
            aload 4 /* isNullNode */
            invokestatic org.graalvm.compiler.nodes.util.GraphUtil.tryKillUnused:(Lorg/graalvm/compiler/graph/Node;)Z
            pop
        21: .line 201
            return
        end local 7 // org.graalvm.compiler.nodes.extended.NullCheckNode trappingNullCheck
        end local 6 // org.graalvm.compiler.nodes.AbstractBeginNode trappingContinuation
        end local 5 // org.graalvm.compiler.nodes.AbstractBeginNode nonTrappingContinuation
        end local 4 // org.graalvm.compiler.nodes.calc.IsNullNode isNullNode
        end local 3 // jdk.vm.ci.meta.DeoptimizationReason deoptimizationReason
        end local 2 // org.graalvm.compiler.nodes.LogicNode condition
        end local 1 // org.graalvm.compiler.nodes.IfNode ifNode
        end local 0 // org.graalvm.compiler.nodes.AbstractDeoptimizeNode deopt
      LocalVariableTable:
        Start  End  Slot                     Name  Signature
            0   22     0                    deopt  Lorg/graalvm/compiler/nodes/AbstractDeoptimizeNode;
            0   22     1                   ifNode  Lorg/graalvm/compiler/nodes/IfNode;
            0   22     2                condition  Lorg/graalvm/compiler/nodes/LogicNode;
            0   22     3     deoptimizationReason  Ljdk/vm/ci/meta/DeoptimizationReason;
            6   22     4               isNullNode  Lorg/graalvm/compiler/nodes/calc/IsNullNode;
            7   22     5  nonTrappingContinuation  Lorg/graalvm/compiler/nodes/AbstractBeginNode;
            8   22     6     trappingContinuation  Lorg/graalvm/compiler/nodes/AbstractBeginNode;
            9   22     7        trappingNullCheck  Lorg/graalvm/compiler/nodes/extended/NullCheckNode;
           14   17     8                     next  Lorg/graalvm/compiler/nodes/FixedNode;
    MethodParameters:
                      Name  Flags
      deopt                 
      ifNode                
      condition             
      deoptimizationReason  

  protected void run(org.graalvm.compiler.nodes.StructuredGraph, java.lang.Object);
    descriptor: (Lorg/graalvm/compiler/nodes/StructuredGraph;Ljava/lang/Object;)V
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            aload 2
            checkcast org.graalvm.compiler.phases.tiers.LowTierContext
            invokevirtual org.graalvm.compiler.phases.common.UseTrappingNullChecksPhase.run:(Lorg/graalvm/compiler/nodes/StructuredGraph;Lorg/graalvm/compiler/phases/tiers/LowTierContext;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lorg/graalvm/compiler/phases/BasePhase<Lorg/graalvm/compiler/phases/tiers/LowTierContext;>;
SourceFile: "UseTrappingNullChecksPhase.java"
InnerClasses:
  public final GuardsStage = org.graalvm.compiler.nodes.StructuredGraph$GuardsStage of org.graalvm.compiler.nodes.StructuredGraph
/

java/ 9/ jdk.internal.vm.compiler/org/graalvm/compiler/phases/common/UseTrappingNullChecksPhase.class
