Error out on nvptx for fpatchable-function-entry

2017-08-03  Tom de Vries  <tom@codesourcery.com>

	PR target/81662
	* config/nvptx/nvptx.c (nvptx_option_override): Emit sorry if
	function_entry_patch_area_size > 0.

	* gcc.target/nvptx/patchable_function_entry-default.c: New test.

From-SVN: r250851

gcc/ChangeLog

+2017-08-03  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/81662
+	* config/nvptx/nvptx.c (nvptx_option_override): Emit sorry if
+	function_entry_patch_area_size > 0.
+
 2017-08-03  Jakub Jelinek  <jakub@redhat.com>
 
 	PR driver/81650

gcc/config/nvptx/nvptx.c

@@ -180,6 +180,10 @@ nvptx_option_override (void)
   if (!global_options_set.x_flag_no_common)
     flag_no_common = 1;
 
+  /* The patch area requires nops, which we don't have.  */
+  if (function_entry_patch_area_size > 0)
+    sorry ("not generating patch area, nops not supported");
+
   /* Assumes that it will see only hard registers.  */
   flag_var_tracking = 0;
 

gcc/testsuite/ChangeLog

+2017-08-03  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/81662
+	* gcc.target/nvptx/patchable_function_entry-default.c: New test.
+
 2017-08-03  Jakub Jelinek  <jakub@redhat.com>
 
 	PR driver/81650

gcc/testsuite/gcc.target/nvptx/patchable_function_entry-default.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fpatchable-function-entry=3,1" } */
+
+extern int a;
+
+int f3 (void);
+
+int
+__attribute__((noinline))
+f3 (void)
+{
+  return 5*a;
+}
+
+/* { dg-excess-errors "sorry, unimplemented: not generating patch area, nops not supported" } */