[PATCH 2/9] [nvptx] Update insufficient launch message for variable vector_length

[Tom de Vries]

Update message in nvptx libgomp plugin about insufficient resources to launch
kernel, to accommodate for the fact the vector_length can now be variable.

19-01-08  Tom de Vries  <tdevr...@suse.de>

        * plugin/plugin-nvptx.c (nvptx_exec): Update insufficient hardware
        resources diagnostic.
---
 libgomp/plugin/plugin-nvptx.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index c80da64c422..8912660966a 100644
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -1297,14 +1297,16 @@ nvptx_exec (void (*fn), size_t mapnum, void 
**hostaddrs, void **devaddrs,
   if (dims[GOMP_DIM_WORKER] * dims[GOMP_DIM_VECTOR]
       > targ_fn->max_threads_per_block)
     {
-      int suggest_workers
-       = targ_fn->max_threads_per_block / dims[GOMP_DIM_VECTOR];
-      GOMP_PLUGIN_fatal ("The Nvidia accelerator has insufficient resources to"
-                        " launch '%s' with num_workers = %d; recompile the"
-                        " program with 'num_workers = %d' on that offloaded"
-                        " region or '-fopenacc-dim=:%d'",
-                        targ_fn->launch->fn, dims[GOMP_DIM_WORKER],
-                        suggest_workers, suggest_workers);
+      const char *msg
+       = ("The Nvidia accelerator has insufficient resources to launch '%s'"
+          " with num_workers = %d and vector_length = %d"
+          "; "
+          "recompile the program with 'num_workers = x and vector_length = y'"
+          " on that offloaded region or '-fopenacc-dim=:x:y' where"
+          " x * y <= %d"
+          ".\n");
+      GOMP_PLUGIN_fatal (msg, targ_fn->launch->fn, dims[GOMP_DIM_WORKER],
+                        dims[GOMP_DIM_VECTOR], targ_fn->max_threads_per_block);
     }
 
   /* Check if the accelerator has sufficient barrier resources to
-- 
2.16.4