--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.amd64/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java	Tue Sep 24 08:54:08 2019 -0700
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.amd64/src/org/graalvm/compiler/core/amd64/AMD64ArithmeticLIRGenerator.java	Tue Sep 24 12:47:15 2019 -0400
@@ -124,7 +124,6 @@
 import org.graalvm.compiler.lir.amd64.AMD64SignExtendOp;
 import org.graalvm.compiler.lir.amd64.AMD64Ternary;
 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.AVXBinaryConstFloatOp;
 import org.graalvm.compiler.lir.amd64.vector.AMD64VectorBinary.AVXBinaryOp;
@@ -1130,12 +1129,6 @@
         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();
     }