*** old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.aarch64/src/org/graalvm/compiler/lir/aarch64/AArch64PrefetchOp.java	Fri Jul  7 09:30:35 2017
--- new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir.aarch64/src/org/graalvm/compiler/lir/aarch64/AArch64PrefetchOp.java	Fri Jul  7 09:30:34 2017

*** 23,49 ****
--- 23,50 ----
  
  package org.graalvm.compiler.lir.aarch64;
  
  import static org.graalvm.compiler.lir.LIRInstruction.OperandFlag.COMPOSITE;
  
+ import org.graalvm.compiler.asm.aarch64.AArch64Assembler.PrefetchMode;
  import org.graalvm.compiler.asm.aarch64.AArch64MacroAssembler;
  import org.graalvm.compiler.lir.LIRInstructionClass;
  import org.graalvm.compiler.lir.asm.CompilationResultBuilder;
  
  public final class AArch64PrefetchOp extends AArch64LIRInstruction {
      public static final LIRInstructionClass<AArch64PrefetchOp> TYPE = LIRInstructionClass.create(AArch64PrefetchOp.class);
  
!     @SuppressWarnings("unused") private final int instr;  // AllocatePrefetchInstr
!     private final PrefetchMode mode;  // AllocatePrefetchInstr
      @Alive({COMPOSITE}) protected AArch64AddressValue address;
  
!     public AArch64PrefetchOp(AArch64AddressValue address, int instr) {
!     public AArch64PrefetchOp(AArch64AddressValue address, PrefetchMode mode) {
          super(TYPE);
          this.address = address;
!         this.instr = instr;
!         this.mode = mode;
      }
  
      @Override
      public void emitCode(CompilationResultBuilder crb, AArch64MacroAssembler masm) {
          // TODO implement prefetch
!         masm.nop();
+         // instr gets ignored!
!         masm.prfm(address.toAddress(), mode);
      }
  }