Add tests for null check elimination by local value numbering.

Change-Id: I0c3355b3c38b8830fffe2233ede7f6a35488b6fe
diff --git a/test/083-compiler-regressions/expected.txt b/test/083-compiler-regressions/expected.txt
index e2846dd..57065ef 100644
--- a/test/083-compiler-regressions/expected.txt
+++ b/test/083-compiler-regressions/expected.txt
@@ -9,5 +9,7 @@
 wideGetterSetterTest passes
 wideIdentityTest passes
 returnConstantTest passes
+LVNTests.testNPE1 passes
+LVNTests.testNPE2 passes
 longDivTest passes
 longModTest passes