re PR debug/86523 (ICE in gen_member_die, at dwarf2out.c:24933 starting from r262560)

2018-07-16  Richard Biener  <rguenther@suse.de>

	PR lto/86523
	* dwarf2out.c (dwarf2out_register_external_die): Assign DIE parents
	for function-local FUNCTION_DECL and RESULT_DECL immediately.

	* g++.dg/lto/pr86523-1_0.C: New testcase.
	* g++.dg/lto/pr86523-2_0.C: Likewise.

From-SVN: r262696

gcc/ChangeLog

+2018-07-16  Richard Biener  <rguenther@suse.de>
+
+	PR lto/86523
+	* dwarf2out.c (dwarf2out_register_external_die): Assign DIE parents
+	for function-local FUNCTION_DECL and RESULT_DECL immediately.
+
 2018-07-16  Martin Liska  <mliska@suse.cz>
 
         PR ipa/86529

gcc/dwarf2out.c

@@ -5959,7 +5959,9 @@ dwarf2out_register_external_die (tree decl, const char *sym,
 	   imports the original CUs.  */
 	parent = comp_unit_die ();
       else if (TREE_CODE (ctx) == FUNCTION_DECL
+	       && TREE_CODE (decl) != FUNCTION_DECL
 	       && TREE_CODE (decl) != PARM_DECL
+	       && TREE_CODE (decl) != RESULT_DECL
 	       && TREE_CODE (decl) != BLOCK)
 	/* Leave function local entities parent determination to when
 	   we process scope vars.  */

gcc/testsuite/ChangeLog

+2018-07-16  Richard Biener  <rguenther@suse.de>
+
+	PR lto/86523
+	* g++.dg/lto/pr86523-1_0.C: New testcase.
+	* g++.dg/lto/pr86523-2_0.C: Likewise.
+
 2018-07-16  Martin Liska  <mliska@suse.cz>
 
         PR ipa/86529

gcc/testsuite/g++.dg/lto/pr86523-1_0.C

+// { dg-lto-do link }
+// { dg-lto-options {{-O2 -flto -g -shared}} }
+namespace {
+    class a typedef b;
+    class a {};
+} // namespace
+class c {
+    struct C {
+	b d;
+    };
+    C e() const;
+};
+c::C c::e() const {
+    C g;
+    struct h {
+	C g;
+	h(C *) {}
+    } f(&g);
+    return g;
+}
+

gcc/testsuite/g++.dg/lto/pr86523-2_0.C

+// { dg-lto-do link }
+// { dg-lto-options {{-O2 -flto -g -shared}} }
+class a typedef b;
+class a {};
+class c {
+    struct C {
+	b d;
+    };
+    C e() const;
+};
+c::C c::e() const {
+    C g;
+    struct h {
+	C g;
+	h(C *) {}
+    } f(&g);
+    return g;
+}