2019-08-29  Jakub Jelinek  <jakub@redhat.com>

	Backported from mainline
	2019-06-12  Jakub Jelinek  <jakub@redhat.com>

	PR c/90760
	* symtab.c (symtab_node::set_section): Allow being called on aliases
	as long as they aren't analyzed yet.

	* gcc.dg/pr90760.c: New test.

--- gcc/symtab.c	(revision 272799)
+++ gcc/symtab.c	(revision 272800)
@@ -1553,7 +1553,7 @@ symtab_node::set_section (symtab_node *n
 void
 symtab_node::set_section (const char *section)
 {
-  gcc_assert (!this->alias);
+  gcc_assert (!this->alias || !this->analyzed);
   call_for_symbol_and_aliases
     (symtab_node::set_section, const_cast<char *>(section), true);
 }
--- gcc/testsuite/gcc.dg/pr90760.c	(nonexistent)
+++ gcc/testsuite/gcc.dg/pr90760.c	(revision 272800)
@@ -0,0 +1,8 @@
+/* PR c/90760 */
+/* { dg-do compile } */
+/* { dg-require-named-sections "" } */
+
+void bar (void) {}
+void foo (void) __attribute__ ((alias ("bar")));	/* { dg-error "section of alias 'foo' must match section of its target" } */
+void foo (void) __attribute__ ((section ("baz")));
+void qux (void) __attribute__ ((alias ("bar"), section ("baz")));	/* { dg-error "section of alias 'qux' must match section of its target" } */