[nvptx] Add exit after call to noreturn function

2017-09-25  Tom de Vries  <tom@codesourcery.com>

	PR target/80035
	PR target/81069
	* config/nvptx/nvptx.c (nvptx_output_call_insn): Add exit after call to
	noreturn function.

From-SVN: r253145

gcc/ChangeLog

+2017-09-25  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/80035
+	PR target/81069
+	* config/nvptx/nvptx.c (nvptx_output_call_insn): Add exit after call to
+	noreturn function.
+
 2017-09-25  Richard Biener  <rguenther@suse.de>
 
 	* graphite-optimize-isl.c (optimize_isl): Fail and dump if

gcc/config/nvptx/nvptx.c

@@ -2304,11 +2304,14 @@ nvptx_output_call_insn (rtx_insn *insn, rtx result, rtx callee)
   fprintf (asm_out_file, ";\n");
 
   if (find_reg_note (insn, REG_NORETURN, NULL))
+    {
       /* No return functions confuse the PTX JIT, as it doesn't realize
 	 the flow control barrier they imply.  It can seg fault if it
 	 encounters what looks like an unexitable loop.  Emit a trailing
-       trap, which it does grok.  */
+	 trap and exit, which it does grok.  */
       fprintf (asm_out_file, "\t\ttrap; // (noreturn)\n");
+      fprintf (asm_out_file, "\t\texit; // (noreturn)\n");
+    }
 
   if (result)
     {