MSVC compile fix: #include <ciso646>. NFC.

This header is required to make the ISO 646 alternative operator
spellings ("and", "or" instead of "&&", "||") work. Should these
operators be replaced by the standard ones as already suggested by
Johannes, also remove this #include again.

llvm-svn: 271206

polly/lib/Transform/ScheduleOptimizer.cpp

@@ -65,6 +65,7 @@
 #include "isl/space.h"
 #include "isl/union_map.h"
 #include "isl/union_set.h"
+#include <ciso646>
 
 using namespace llvm;
 using namespace polly;