Introduce CLC_VERSION macros v2

Add these out-of-order in clc.h so we can use these in other headers.

v2: Take into account the lack of a definition in OpenCL 1.0

Reviewed-by: Tom Stellard <tom@stellard.net>
llvm-svn: 211578

libclc/generic/include/clc/clc.h

@@ -11,6 +11,9 @@
 /* Function Attributes */
 #include <clc/clcfunc.h>
 
+/* 6.9 Preprocessor Directives and Macros */
+#include <clc/clcversion.h>
+
 /* 6.1 Supported Data Types */
 #include <clc/clctypes.h>
 

libclc/generic/include/clc/clcversion.h

@@ -0,0 +1,8 @@
+#if __OPENCL_VERSION__ >= 110
+#define CLC_VERSION_1_0 100
+#define CLC_VERSION_1_1 110
+#endif
+
+#if __OPENCL_VERSION__ >= 120
+#define CLC_VERSION_1_2 120
+#endif