[nvptx offloading] Only 64-bit configurations are currently supported

	PR libgomp/65099
	gcc/
	* config/nvptx/mkoffload.c (main): Create an offload image only in
	64-bit configurations.
	libgomp/
	* plugin/plugin-nvptx.c (nvptx_get_num_devices): Return 0 if not
	in a 64-bit configuration.
	* testsuite/libgomp.oacc-c++/c++.exp: Don't attempt nvidia
	offloading testing if no such device is available.
	* testsuite/libgomp.oacc-c/c.exp: Likewise.
	* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.

From-SVN: r225560

7 files changed, 70 insertions, 25 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 33a2fa0..4c83723 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-07-08  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR libgomp/65099
+	* config/nvptx/mkoffload.c (main): Create an offload image only in
+	64-bit configurations.
+
 2015-07-08  Martin Liska  <mliska@suse.cz>
 
 	PR bootstrap/66744
diff --git a/gcc/config/nvptx/mkoffload.c b/gcc/config/nvptx/mkoffload.c
index 8687154..8bc08bf 100644
--- a/gcc/config/nvptx/mkoffload.c
+++ b/gcc/config/nvptx/mkoffload.c
@@ -993,37 +993,43 @@ main (int argc, char **argv)
 	obstack_ptr_grow (&argv_obstack, argv[ix]);
     }
 
-  ptx_name = make_temp_file (".mkoffload");
-  obstack_ptr_grow (&argv_obstack, "-o");
-  obstack_ptr_grow (&argv_obstack, ptx_name);
-  obstack_ptr_grow (&argv_obstack, NULL);
-  const char **new_argv = XOBFINISH (&argv_obstack, const char **);
-
-  char *execpath = getenv ("GCC_EXEC_PREFIX");
-  char *cpath = getenv ("COMPILER_PATH");
-  char *lpath = getenv ("LIBRARY_PATH");
-  unsetenv ("GCC_EXEC_PREFIX");
-  unsetenv ("COMPILER_PATH");
-  unsetenv ("LIBRARY_PATH");
-
-  fork_execute (new_argv[0], CONST_CAST (char **, new_argv), true);
-  obstack_free (&argv_obstack, NULL);
-
-  xputenv (concat ("GCC_EXEC_PREFIX=", execpath, NULL));
-  xputenv (concat ("COMPILER_PATH=", cpath, NULL));
-  xputenv (concat ("LIBRARY_PATH=", lpath, NULL));
-
-  in = fopen (ptx_name, "r");
-  if (!in)
-    fatal_error (input_location, "cannot open intermediate ptx file");
-
   ptx_cfile_name = make_temp_file (".c");
 
   out = fopen (ptx_cfile_name, "w");
   if (!out)
     fatal_error (input_location, "cannot open '%s'", ptx_cfile_name);
 
-  process (in, out);
+  /* PR libgomp/65099: Currently, we only support offloading in 64-bit
+     configurations.  */
+  if (!target_ilp32)
+    {
+      ptx_name = make_temp_file (".mkoffload");
+      obstack_ptr_grow (&argv_obstack, "-o");
+      obstack_ptr_grow (&argv_obstack, ptx_name);
+      obstack_ptr_grow (&argv_obstack, NULL);
+      const char **new_argv = XOBFINISH (&argv_obstack, const char **);
+
+      char *execpath = getenv ("GCC_EXEC_PREFIX");
+      char *cpath = getenv ("COMPILER_PATH");
+      char *lpath = getenv ("LIBRARY_PATH");
+      unsetenv ("GCC_EXEC_PREFIX");
+      unsetenv ("COMPILER_PATH");
+      unsetenv ("LIBRARY_PATH");
+
+      fork_execute (new_argv[0], CONST_CAST (char **, new_argv), true);
+      obstack_free (&argv_obstack, NULL);
+
+      xputenv (concat ("GCC_EXEC_PREFIX=", execpath, NULL));
+      xputenv (concat ("COMPILER_PATH=", cpath, NULL));
+      xputenv (concat ("LIBRARY_PATH=", lpath, NULL));
+
+      in = fopen (ptx_name, "r");
+      if (!in)
+	fatal_error (input_location, "cannot open intermediate ptx file");
+
+      process (in, out);
+    }
+
   fclose (out);
 
   compile_native (ptx_cfile_name, outname, collect_gcc);
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 8839397..34f3a1c 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,13 @@
+2015-07-08  Thomas Schwinge  <thomas@codesourcery.com>
+
+	PR libgomp/65099
+	* plugin/plugin-nvptx.c (nvptx_get_num_devices): Return 0 if not
+	in a 64-bit configuration.
+	* testsuite/libgomp.oacc-c++/c++.exp: Don't attempt nvidia
+	offloading testing if no such device is available.
+	* testsuite/libgomp.oacc-c/c.exp: Likewise.
+	* testsuite/libgomp.oacc-fortran/fortran.exp: Likewise.
+
 2015-07-08  Tom de Vries  <tom@codesourcery.com>
 
 	* testsuite/libgomp.c/parloops-exit-first-loop-alt-3.c (main): Fix
diff --git a/libgomp/plugin/plugin-nvptx.c b/libgomp/plugin/plugin-nvptx.c
index ee3a0ae..b67d301 100644
--- a/libgomp/plugin/plugin-nvptx.c
+++ b/libgomp/plugin/plugin-nvptx.c
@@ -777,6 +777,11 @@ nvptx_get_num_devices (void)
   int n;
   CUresult r;
 
+  /* PR libgomp/65099: Currently, we only support offloading in 64-bit
+     configurations.  */
+  if (sizeof (void *) != 8)
+    return 0;
+
   /* This function will be called before the plugin has been initialized in
      order to enumerate available devices, but CUDA API routines can't be used
      until cuInit has been called.  Just call it now (but don't yet do any
diff --git a/libgomp/testsuite/libgomp.oacc-c++/c++.exp b/libgomp/testsuite/libgomp.oacc-c++/c++.exp
index 80d1359..3b97024 100644
--- a/libgomp/testsuite/libgomp.oacc-c++/c++.exp
+++ b/libgomp/testsuite/libgomp.oacc-c++/c++.exp
@@ -85,6 +85,12 @@ if { $lang_test_file_found } {
 		set acc_mem_shared 0
 	    }
 	    nvidia {
+		if { ![check_effective_target_openacc_nvidia_accel_present] } {
+		    # Don't bother; execution testing is going to FAIL.
+		    untested "$subdir $offload_target_openacc offloading"
+		    continue
+		}
+
 		# Copy ptx file (TEMPORARY)
 		remote_download host $srcdir/libgomp.oacc-c-c++-common/subr.ptx
 
diff --git a/libgomp/testsuite/libgomp.oacc-c/c.exp b/libgomp/testsuite/libgomp.oacc-c/c.exp
index c0c70bb..326b988 100644
--- a/libgomp/testsuite/libgomp.oacc-c/c.exp
+++ b/libgomp/testsuite/libgomp.oacc-c/c.exp
@@ -48,6 +48,12 @@ foreach offload_target_openacc $offload_targets_s_openacc {
 	    set acc_mem_shared 0
 	}
 	nvidia {
+	    if { ![check_effective_target_openacc_nvidia_accel_present] } {
+		# Don't bother; execution testing is going to FAIL.
+		untested "$subdir $offload_target_openacc offloading"
+		continue
+	    }
+
 	    # Copy ptx file (TEMPORARY)
 	    remote_download host $srcdir/libgomp.oacc-c-c++-common/subr.ptx
 
diff --git a/libgomp/testsuite/libgomp.oacc-fortran/fortran.exp b/libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
index a8f62e8..a8aaff0 100644
--- a/libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
+++ b/libgomp/testsuite/libgomp.oacc-fortran/fortran.exp
@@ -77,6 +77,12 @@ if { $lang_test_file_found } {
 		set acc_mem_shared 0
 	    }
 	    nvidia {
+		if { ![check_effective_target_openacc_nvidia_accel_present] } {
+		    # Don't bother; execution testing is going to FAIL.
+		    untested "$subdir $offload_target_openacc offloading"
+		    continue
+		}
+
 		set acc_mem_shared 0
 	    }
 	    default {