--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.amd64/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java	2019-05-04 02:43:33.100053121 +0200
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.amd64/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java	2019-05-04 02:43:32.740051014 +0200
@@ -121,6 +121,7 @@
 import org.graalvm.compiler.lir.amd64.AMD64ShiftOp;
 import org.graalvm.compiler.lir.amd64.AMD64SignExtendOp;
 import org.graalvm.compiler.lir.amd64.AMD64Unary;
+import org.graalvm.compiler.lir.amd64.AMD64ZeroMemoryOp;
 import org.graalvm.compiler.lir.amd64.vector.AMD64VectorBinary;
 import org.graalvm.compiler.lir.amd64.vector.AMD64VectorBinary.AVXBinaryOp;
 import org.graalvm.compiler.lir.amd64.vector.AMD64VectorUnary;
@@ -1102,6 +1103,12 @@
         return new AMD64MathPowOp().emitLIRWrapper(getLIRGen(), x, y);
     }
 
+    @Override
+    public void emitZeroMemory(Value address, Value length) {
+        RegisterValue lengthReg = moveToReg(AMD64.rcx, length);
+        getLIRGen().append(new AMD64ZeroMemoryOp(getAMD64LIRGen().asAddressValue(address), lengthReg));
+    }
+
     protected AMD64LIRGenerator getAMD64LIRGen() {
         return (AMD64LIRGenerator) getLIRGen();
     }