PR debug/86459 - Fix -gsplit-dwarf -g3 gcc_assert

There was a typo in the output_macinfo_op gcc_assert.
The function is called dwarf_FORM, not dwarf_form.
Add the provided testcase from the bug to test -gsplit-dwarf -g3.

gcc/ChangeLog:

	PR debug/86459
	* dwarf2out.c (output_macinfo_op): Fix dwarf_FORM typo in gcc_assert.

gcc/testsuite/ChangeLog:

	PR debug/86459
	* gcc.dg/pr86459.c: New test.

From-SVN: r262545

gcc/ChangeLog

+2018-07-10  Mark Wielaard  <mark@klomp.org>
+
+	PR debug/86459
+	* dwarf2out.c (output_macinfo_op): Fix dwarf_FORM typo in gcc_assert.
+
 2018-07-10  Richard Biener  <rguenther@suse.de>
 
 	* hash-map.h (hash_map::iterator::operator*): Return

gcc/dwarf2out.c

@@ -28066,7 +28066,7 @@ output_macinfo_op (macinfo_entry *ref)
       node = find_AT_string (ref->info);
       gcc_assert (node
 		  && (node->form == DW_FORM_strp
-		      || node->form == dwarf_form (DW_FORM_strx)));
+		      || node->form == dwarf_FORM (DW_FORM_strx)));
       dw2_asm_output_data (1, ref->code,
 			   ref->code == DW_MACRO_define_strp
 			   ? "Define macro strp"

gcc/testsuite/ChangeLog

+2018-07-10  Mark Wielaard  <mark@klomp.org>
+
+	PR debug/86459
+	* gcc.dg/pr86459.c: New test.
+
 2018-07-10  Martin Sebor  <msebor@redhat.com>
 
 	PR testsuite/86461

gcc/testsuite/gcc.dg/pr86459.c

+/* { dg-do compile } */
+/* { dg-options "-g -O2 -fno-var-tracking-assignments -gsplit-dwarf -g3" } */
+
+/* Same as pr86064.c but compiled with -g3 it showed an issue in
+   output_macinfo_op because of a typo in an assert.  */
+
+int a;
+__attribute__((__cold__)) void b();
+
+void e(int *);
+int f();
+
+void c() {
+  int d;
+  e(&d);
+  a = d;
+  if (f())
+    b();
+}