Added basic psuedoconstant checking in IdempotentOperationChecker and fixed some test cases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111190 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/idempotent-operations.c b/test/Analysis/idempotent-operations.c
index 23401e8..a54a3aa 100644
--- a/test/Analysis/idempotent-operations.c
+++ b/test/Analysis/idempotent-operations.c
@@ -74,12 +74,14 @@
 // False positive tests
 
 unsigned false1() {
-  return (5 - 2 - 3); // no-warning
+  int a = 10;
+  return a * (5 - 2 - 3); // no-warning
 }
 
 enum testenum { enum1 = 0, enum2 };
 unsigned false2() {
-  return enum1; // no-warning
+  int a = 1234;
+  return enum1 + a; // no-warning
 }
 
 extern unsigned foo();