Add "sorry, target cannot support label values" for nvptx

2017-06-09  Tom de Vries  <tom@codesourcery.com>

	PR target/80855
	* config/nvptx/nvptx.md (define_expand "mov<QHSDISDFM>"): Error out with
	"target cannot support label values" when encountering LABEL_REF.

	* gcc.target/nvptx/label-values.c: New test.

From-SVN: r249060

gcc/ChangeLog

+2017-06-09  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/80855
+	* config/nvptx/nvptx.md (define_expand "mov<QHSDISDFM>"): Error out with
+	"target cannot support label values" when encountering LABEL_REF.
+
 2017-06-09  Martin Liska  <mliska@suse.cz>
 
 	* tree-profile.c (gimple_gen_ic_profiler): Update comment.

gcc/config/nvptx/nvptx.md

@@ -254,6 +254,9 @@
       emit_move_insn (operands[0], tmp);
       DONE;
     }
+
+  if (GET_CODE (operands[1]) == LABEL_REF)
+    sorry ("target cannot support label values");
 })
 
 (define_insn "zero_extendqihi2"

gcc/testsuite/ChangeLog

+2017-06-09  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/80855
+	* gcc.target/nvptx/label-values.c: New test.
+
 2017-06-09  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* lib/target-supports.exp (check_effective_target_arm_arch_FUNC_ok):

gcc/testsuite/gcc.target/nvptx/label-values.c

+/* { dg-do compile } */
+/* { dg-additional-options "-Wno-pedantic" } */
+
+int
+main (void)
+{
+  goto L2;
+ L1:
+  return 0;
+ L2:
+  {
+    void *ptr = &&L1; /* { dg-message "sorry, unimplemented: target cannot support label values" "" } */
+  }
+}