[nvptx] Move macro defs to top of nvptx.c

Move macro definition to the top of the file, allowing them to be used
there-after.

Build and reg-tested on x86_64 with nvptx accelerator.

2018-12-17  Tom de Vries  <tdevries@suse.de>

	* config/nvptx/nvptx.c (PTX_VECTOR_LENGTH, PTX_WORKER_LENGTH,
	PTX_DEFAULT_RUNTIME_DIM): Move to the top of the file.

From-SVN: r267216

gcc/ChangeLog

 2018-12-17  Tom de Vries  <tdevries@suse.de>
 
+	* config/nvptx/nvptx.c (PTX_VECTOR_LENGTH, PTX_WORKER_LENGTH,
+	PTX_DEFAULT_RUNTIME_DIM): Move to the top of the file.
+
+2018-12-17  Tom de Vries  <tdevries@suse.de>
+
 	* config/nvptx/nvptx.c (PTX_WARP_SIZE): Define.
 	(nvptx_simt_vf): Return PTX_WARP_SIZE instead of PTX_VECTOR_LENGTH.
 

gcc/config/nvptx/nvptx.c

@@ -82,6 +82,9 @@
 #define WORKAROUND_PTXJIT_BUG_3 1
 
 #define PTX_WARP_SIZE 32
+#define PTX_VECTOR_LENGTH 32
+#define PTX_WORKER_LENGTH 32
+#define PTX_DEFAULT_RUNTIME_DIM 0 /* Defer to runtime.  */
 
 /* The various PTX memory areas an object might reside in.  */
 enum nvptx_data_area
@@ -5166,11 +5169,6 @@ nvptx_expand_builtin (tree exp, rtx target, rtx ARG_UNUSED (subtarget),
     default: gcc_unreachable ();
     }
 }
-
-/* Define dimension sizes for known hardware.  */
-#define PTX_VECTOR_LENGTH 32
-#define PTX_WORKER_LENGTH 32
-#define PTX_DEFAULT_RUNTIME_DIM 0 /* Defer to runtime.  */
 
 /* Implement TARGET_SIMT_VF target hook: number of threads in a warp.  */