https://www.graalvm.org/ 
final class org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp extends org.graalvm.compiler.lir.amd64.AMD64LIRInstruction
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp
  super_class: org.graalvm.compiler.lir.amd64.AMD64LIRInstruction
{
  public static final org.graalvm.compiler.lir.LIRInstructionClass<org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp> TYPE;
    descriptor: Lorg/graalvm/compiler/lir/LIRInstructionClass;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL
    Signature: Lorg/graalvm/compiler/lir/LIRInstructionClass<Lorg/graalvm/compiler/hotspot/amd64/AMD64HotSpotPatchReturnAddressOp;>;

  jdk.vm.ci.meta.AllocatableValue address;
    descriptor: Ljdk/vm/ci/meta/AllocatableValue;
    flags: (0x0000) 
    RuntimeVisibleAnnotations: 
      org.graalvm.compiler.lir.LIRInstruction$Use(value = {org.graalvm.compiler.lir.LIRInstruction$OperandFlag.REG:Lorg/graalvm/compiler/lir/LIRInstruction$OperandFlag;})

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 45
            ldc Lorg/graalvm/compiler/hotspot/amd64/AMD64HotSpotPatchReturnAddressOp;
            invokestatic org.graalvm.compiler.lir.LIRInstructionClass.create:(Ljava/lang/Class;)Lorg/graalvm/compiler/lir/LIRInstructionClass;
            putstatic org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp.TYPE:Lorg/graalvm/compiler/lir/LIRInstructionClass;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  void <init>(jdk.vm.ci.meta.AllocatableValue);
    descriptor: (Ljdk/vm/ci/meta/AllocatableValue;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp this
        start local 1 // jdk.vm.ci.meta.AllocatableValue address
         0: .line 50
            aload 0 /* this */
            getstatic org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp.TYPE:Lorg/graalvm/compiler/lir/LIRInstructionClass;
            invokespecial org.graalvm.compiler.lir.amd64.AMD64LIRInstruction.<init>:(Lorg/graalvm/compiler/lir/LIRInstructionClass;)V
         1: .line 51
            aload 0 /* this */
            aload 1 /* address */
            putfield org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp.address:Ljdk/vm/ci/meta/AllocatableValue;
         2: .line 52
            return
        end local 1 // jdk.vm.ci.meta.AllocatableValue address
        end local 0 // org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp this
      LocalVariableTable:
        Start  End  Slot     Name  Signature
            0    3     0     this  Lorg/graalvm/compiler/hotspot/amd64/AMD64HotSpotPatchReturnAddressOp;
            0    3     1  address  Ljdk/vm/ci/meta/AllocatableValue;
    MethodParameters:
         Name  Flags
      address  

  public void emitCode(org.graalvm.compiler.lir.asm.CompilationResultBuilder, org.graalvm.compiler.asm.amd64.AMD64MacroAssembler);
    descriptor: (Lorg/graalvm/compiler/lir/asm/CompilationResultBuilder;Lorg/graalvm/compiler/asm/amd64/AMD64MacroAssembler;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=4, args_size=3
        start local 0 // org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp this
        start local 1 // org.graalvm.compiler.lir.asm.CompilationResultBuilder crb
        start local 2 // org.graalvm.compiler.asm.amd64.AMD64MacroAssembler masm
         0: .line 56
            aload 1 /* crb */
            getfield org.graalvm.compiler.lir.asm.CompilationResultBuilder.frameMap:Lorg/graalvm/compiler/lir/framemap/FrameMap;
            invokevirtual org.graalvm.compiler.lir.framemap.FrameMap.totalFrameSize:()I
            aload 2 /* masm */
            getfield org.graalvm.compiler.asm.amd64.AMD64MacroAssembler.target:Ljdk/vm/ci/code/TargetDescription;
            getfield jdk.vm.ci.code.TargetDescription.arch:Ljdk/vm/ci/code/Architecture;
            invokevirtual jdk.vm.ci.code.Architecture.getReturnAddressSize:()I
            isub
            istore 3 /* returnAddressOffset */
        start local 3 // int returnAddressOffset
         1: .line 57
            aload 2 /* masm */
            new org.graalvm.compiler.asm.amd64.AMD64Address
            dup
            getstatic jdk.vm.ci.amd64.AMD64.rsp:Ljdk/vm/ci/code/Register;
            iload 3 /* returnAddressOffset */
            invokespecial org.graalvm.compiler.asm.amd64.AMD64Address.<init>:(Ljdk/vm/ci/code/Register;I)V
            aload 0 /* this */
            getfield org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp.address:Ljdk/vm/ci/meta/AllocatableValue;
            invokestatic jdk.vm.ci.code.ValueUtil.asRegister:(Ljdk/vm/ci/meta/Value;)Ljdk/vm/ci/code/Register;
            invokevirtual org.graalvm.compiler.asm.amd64.AMD64MacroAssembler.movq:(Lorg/graalvm/compiler/asm/amd64/AMD64Address;Ljdk/vm/ci/code/Register;)V
         2: .line 58
            return
        end local 3 // int returnAddressOffset
        end local 2 // org.graalvm.compiler.asm.amd64.AMD64MacroAssembler masm
        end local 1 // org.graalvm.compiler.lir.asm.CompilationResultBuilder crb
        end local 0 // org.graalvm.compiler.hotspot.amd64.AMD64HotSpotPatchReturnAddressOp this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0    3     0                 this  Lorg/graalvm/compiler/hotspot/amd64/AMD64HotSpotPatchReturnAddressOp;
            0    3     1                  crb  Lorg/graalvm/compiler/lir/asm/CompilationResultBuilder;
            0    3     2                 masm  Lorg/graalvm/compiler/asm/amd64/AMD64MacroAssembler;
            1    3     3  returnAddressOffset  I
    MethodParameters:
      Name  Flags
      crb   
      masm  
}
SourceFile: "AMD64HotSpotPatchReturnAddressOp.java"
InnerClasses:
  public final OperandFlag = org.graalvm.compiler.lir.LIRInstruction$OperandFlag of org.graalvm.compiler.lir.LIRInstruction
  public abstract Use = org.graalvm.compiler.lir.LIRInstruction$Use of org.graalvm.compiler.lir.LIRInstruction
    RuntimeVisibleAnnotations: 
      org.graalvm.compiler.lir.Opcode(value = "PATCH_RETURN")