Add same constant phi merge test

1 files changed, 15 insertions, 0 deletions

diff --git a/chapter22/src/test/java/com/seaofnodes/simple/Chapter05Test.java b/chapter22/src/test/java/com/seaofnodes/simple/Chapter05Test.java
index d1dfd216..6ff4ac95 100644
--- a/chapter22/src/test/java/com/seaofnodes/simple/Chapter05Test.java
+++ b/chapter22/src/test/java/com/seaofnodes/simple/Chapter05Test.java
@@ -135,6 +135,21 @@ return a;
     }
 
     @Test
+    public void testMergeSameCon() {
+        CodeGen code = new CodeGen(
+"""
+int a=arg;
+if( arg==1 )
+    a=3;
+else
+    a=3;
+return a;
+""");
+        code.parse().opto();
+        assertEquals("return 3;", code.print());
+    }
+
+    @Test
     public void testTrue() {
       CodeGen code = new CodeGen("return true;").parse();
       assertEquals("return 1;",code.print());