add a new testcase which occurs in 181.mcf

llvm-svn: 21489
diff --git a/llvm/test/Regression/Transforms/InstCombine/set.ll b/llvm/test/Regression/Transforms/InstCombine/set.ll
index 9ade443..970fceb 100644
--- a/llvm/test/Regression/Transforms/InstCombine/set.ll
+++ b/llvm/test/Regression/Transforms/InstCombine/set.ll
@@ -100,3 +100,9 @@
         ret bool %tmp.4
 }
 
+bool %test19(bool %A, bool %B) {
+	%a = cast bool %A to int
+	%b = cast bool %B to int
+	%C = seteq int %a, %b
+	ret bool %C
+}