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[gomp-nvptx,7/9] nvptx mkoffload: pass -mgomp for OpenMP offloading

Message ID 1448983707-18854-8-git-send-email-amonakov@ispras.ru
State New
Headers show

Commit Message

Alexander Monakov Dec. 1, 2015, 3:28 p.m. UTC 
This patch wires up use of alternative -mgomp multilib for OpenMP offloading
via nvptx mkoffload.  It makes OpenACC and OpenMP incompatible for
simultaneous offloading compilation, so I've added a diagnostic for that.

	* config/nvptx/mkoffload.c (main): Check that either OpenACC or OpenMP
	is selected.  Pass -mgomp to offload compiler in OpenMP case.
---
 gcc/config/nvptx/mkoffload.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/gcc/config/nvptx/mkoffload.c b/gcc/config/nvptx/mkoffload.c
index 7aa6f09..9a5d36d 100644
--- a/gcc/config/nvptx/mkoffload.c
+++ b/gcc/config/nvptx/mkoffload.c
@@ -460,6 +460,7 @@  main (int argc, char **argv)
 
   /* Scan the argument vector.  */
   bool fopenmp = false;
+  bool fopenacc = false;
   for (int i = 1; i < argc; i++)
     {
 #define STR "-foffload-abi="
@@ -476,11 +477,15 @@  main (int argc, char **argv)
 #undef STR
       else if (strcmp (argv[i], "-fopenmp") == 0)
 	fopenmp = true;
+      else if (strcmp (argv[i], "-fopenacc") == 0)
+	fopenacc = true;
       else if (strcmp (argv[i], "-save-temps") == 0)
 	save_temps = true;
       else if (strcmp (argv[i], "-v") == 0)
 	verbose = true;
     }
+  if (!(fopenacc ^ fopenmp))
+    fatal_error (input_location, "either -fopenacc or -fopenmp must be set");
 
   struct obstack argv_obstack;
   obstack_init (&argv_obstack);
@@ -501,6 +506,8 @@  main (int argc, char **argv)
     default:
       gcc_unreachable ();
     }
+  if (fopenmp)
+    obstack_ptr_grow (&argv_obstack, "-mgomp");
 
   for (int ix = 1; ix != argc; ix++)
     {