--- old/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/MergeCanonicalizerTest.java	2017-11-03 23:56:07.385699177 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/MergeCanonicalizerTest.java	2017-11-03 23:56:07.019682798 -0700
@@ -26,12 +26,23 @@
 import org.graalvm.compiler.nodes.ReturnNode;
 import org.graalvm.compiler.nodes.StructuredGraph;
 import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.phases.OptimisticOptimizations;
+import org.graalvm.compiler.phases.OptimisticOptimizations.Optimization;
 import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.tiers.HighTierContext;
 import org.graalvm.compiler.phases.tiers.PhaseContext;
 import org.junit.Test;
 
 public class MergeCanonicalizerTest extends GraalCompilerTest {
 
+    /**
+     * These tests assume all code paths are reachable so disable profile based dead code removal.
+     */
+    @Override
+    protected HighTierContext getDefaultHighTierContext() {
+        return new HighTierContext(getProviders(), getDefaultGraphBuilderSuite(), OptimisticOptimizations.ALL.remove(Optimization.RemoveNeverExecutedCode));
+    }
+
     public static int staticField;
 
     private int field;