[lit] Use py2&3 compatible exec() syntax.

llvm-svn: 187862

llvm/utils/lit/lit/TestingConfig.py

@@ -1,6 +1,8 @@
 import os
 import sys
 
+PY2 = sys.version_info[0] < 3
+
 class TestingConfig:
     """"
     TestingConfig - Information on the tests inside a suite.
@@ -59,7 +61,11 @@ class TestingConfig:
             cfg_globals['lit'] = litConfig
             cfg_globals['__file__'] = path
             try:
-                exec f in cfg_globals
+                data = f.read()
+                if PY2:
+                    exec("exec data in cfg_globals")
+                else:
+                    exec(data, cfg_globals)
                 if litConfig.debug:
                     litConfig.note('... loaded config %r' % path)
             except SystemExit: