src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/NewInstanceStub.java

@@ -51,10 +51,11 @@
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.tlabNumberOfRefillsOffset;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.tlabRefillWasteIncrement;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.tlabRefillWasteLimitOffset;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.tlabSlowAllocationsOffset;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.tlabStats;
+import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.useCMSIncrementalMode;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.useG1GC;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.useTLAB;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.wordSize;
 import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.writeTlabTop;
 import static org.graalvm.compiler.hotspot.stubs.StubUtil.handlePendingException;

@@ -145,11 +146,11 @@
          * The type is known to be an instance so Klass::_layout_helper is the instance size as a
          * raw number
          */
         Word thread = registerAsWord(threadRegister);
         boolean inlineContiguousAllocationSupported = GraalHotSpotVMConfigNode.inlineContiguousAllocationSupported();
-        if (!forceSlowPath(options) && inlineContiguousAllocationSupported) {
+        if (!forceSlowPath(options) && inlineContiguousAllocationSupported && !useCMSIncrementalMode(INJECTED_VMCONFIG)) {
             if (isInstanceKlassFullyInitialized(hub)) {
                 int sizeInBytes = readLayoutHelper(hub);
                 Word memory = refillAllocate(thread, intArrayHub, sizeInBytes, logging(options));
                 if (memory.notEqual(0)) {
                     Word prototypeMarkWord = hub.readWord(prototypeMarkWordOffset(INJECTED_VMCONFIG), PROTOTYPE_MARK_WORD_LOCATION);