--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/NewInstanceStub.java	2018-04-11 14:33:22.157163235 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/NewInstanceStub.java	2018-04-11 14:33:21.837164329 -0700
@@ -39,7 +39,7 @@
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readLayoutHelper;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.log2WordSize;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.prototypeMarkWordOffset;
-import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabEnd;
+import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabFastPathEnd;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabStart;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabTop;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.registerAsWord;
@@ -115,7 +115,7 @@
 
     private static Word allocate(Word thread, int size) {
         Word top = readTlabTop(thread);
-        Word end = readTlabEnd(thread);
+        Word end = readTlabFastPathEnd(thread);
         Word newTop = top.add(size);
         /*
          * this check might lead to problems if the TLAB is within 16GB of the address space end
@@ -192,7 +192,7 @@
         int alignmentReserveInBytes = tlabAlignmentReserveInHeapWords(INJECTED_VMCONFIG) * wordSize();
 
         Word top = readTlabTop(thread);
-        Word end = readTlabEnd(thread);
+        Word end = readTlabFastPathEnd(thread);
 
         // calculate amount of free space
         long tlabFreeSpaceInBytes = end.subtract(top).rawValue();