From: Jakub Jelinek <jakub@redhat.com>
Date: Fri, 12 Jun 2015 11:56:08 +0000 (+0200)
Subject: backport: re PR pch/65550 (ICE (segfault) with pch)
X-Git-Tag: releases/gcc-4.9.3~77
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a1341addc63639004194777da3a608191996ba1;p=thirdparty%2Fgcc.git

backport: re PR pch/65550 (ICE (segfault) with pch)

	Backported from mainline
	2015-04-09  Richard Biener  <rguenther@suse.de>

	PR pch/65550
	* files.c (pch_open_file): Allow main and pre-included files
	when trying to open a PCH.

From-SVN: r224422
---

diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index 47dc9a962ac0..137ccf2cc2cc 100644
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,12 @@
+2015-06-12  Jakub Jelinek  <jakub@redhat.com>
+
+	Backported from mainline
+	2015-04-09  Richard Biener  <rguenther@suse.de>
+
+	PR pch/65550
+	* files.c (pch_open_file): Allow main and pre-included files
+	when trying to open a PCH.
+
 2014-11-28  Jakub Jelinek  <jakub@redhat.com>
 
 	Backported from mainline
diff --git a/libcpp/files.c b/libcpp/files.c
index 149f06df201b..f9834951c2f4 100644
--- a/libcpp/files.c
+++ b/libcpp/files.c
@@ -291,11 +291,13 @@ pch_open_file (cpp_reader *pfile, _cpp_file *file, bool *invalid_pch)
 
   /* If the file is not included as first include from either the toplevel
      file or the command-line it is not a valid use of PCH.  */
-  if (pfile->all_files
-      && pfile->all_files->next_file
-      && !(pfile->all_files->implicit_preinclude
-	   || pfile->all_files->next_file->implicit_preinclude))
-    return false;
+  for (_cpp_file *f = pfile->all_files; f; f = f->next_file)
+    if (f->implicit_preinclude)
+      continue;
+    else if (f->main_file)
+      break;
+    else
+      return false;
 
   flen = strlen (path);
   len = flen + sizeof (extension);