Do not create a HBoundType when the instruction is non-null.

We don't need to refine the type after a null check, if the
instruction is known non null or null. As a side effect, this
avoids replacing HLoadClass instructions with HBoundType instructions.

bug:22116987

Change-Id: I565ae95db5a64faec30e026674636e398e0bf445

1 files changed, 15 insertions, 0 deletions

diff --git a/test/519-bound-load-class/src/Main.java b/test/519-bound-load-class/src/Main.java
index 41bb951..cddeb09 100644
--- a/test/519-bound-load-class/src/Main.java
+++ b/test/519-bound-load-class/src/Main.java
@@ -16,9 +16,24 @@
 
 public class Main {
   public static void main(String[] args) {
+    testInstanceOf();
+    try {
+      testNull();
+      throw new Error("Expected ClassClastException");
+    } catch (ClassCastException e) { /* ignore */ }
+  }
+
+  public static void testInstanceOf() {
     Object o = Main.class;
     if (o instanceof Main) {
       System.out.println((Main)o);
     }
   }
+
+  public static void testNull() {
+    Object o = Main.class;
+    if (o != null) {
+      System.out.println((Main)o);
+    }
+  }
 }