src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/stackslotalloc/LSStackSlotAllocator.java
--- a/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/stackslotalloc/LSStackSlotAllocator.java Fri Feb 02 10:37:48 2018 -0500
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.lir/src/org/graalvm/compiler/lir/stackslotalloc/LSStackSlotAllocator.java Fri Feb 02 17:28:17 2018 -0800
@@ -35,6 +35,7 @@
import java.util.EnumSet;
import java.util.PriorityQueue;
+import org.graalvm.collections.EconomicSet;
import org.graalvm.compiler.core.common.cfg.AbstractBlockBase;
import org.graalvm.compiler.debug.DebugCloseable;
import org.graalvm.compiler.debug.DebugContext;
@@ -54,7 +55,6 @@
import org.graalvm.compiler.options.NestedBooleanOptionKey;
import org.graalvm.compiler.options.Option;
import org.graalvm.compiler.options.OptionType;
-import org.graalvm.util.EconomicSet;
import jdk.vm.ci.code.StackSlot;
import jdk.vm.ci.code.TargetDescription;