do not warn about -=/=- confusion with macros, thanks to rdogra for a testcase.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@66416 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/exprs.c b/test/Sema/exprs.c
index 25da12b..8bf42f7 100644
--- a/test/Sema/exprs.c
+++ b/test/Sema/exprs.c
@@ -25,6 +25,10 @@
 
       var =+5;  // no warning when the subexpr of the unary op has no space before it.
       var =-5;
+  
+#define FIVE 5
+      var=-FIVE;  // no warning with macros.
+      var=-FIVE;
 }
 
 // rdar://6319320