From 789c274118d76ab0aab936c51e62a792bab3ab98 Mon Sep 17 00:00:00 2001
From: Jan Hubicka <hubicka@ucw.cz>
Date: Thu, 17 Apr 2014 04:22:57 +0200
Subject: [PATCH] re PR ipa/60854 (inline constructor of extern template)

	PR ipa/60854
	* ipa.c (symtab_remove_unreachable_nodes): Mark targets of
	external aliases alive, too.
	* g++.dg/torture/pr60854.C: New testcase.

From-SVN: r209459
---
 gcc/ChangeLog                          |  6 ++++++
 gcc/ipa.c                              | 13 ++++++++++++-
 gcc/testsuite/ChangeLog                |  5 +++++
 gcc/testsuite/g++.dg/torture/pr60854.C | 13 +++++++++++++
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/g++.dg/torture/pr60854.C

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ef1da88cc74f..5cff60ebc36f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2014-04-16  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/60854
+	* ipa.c (symtab_remove_unreachable_nodes): Mark targets of
+	external aliases alive, too.
+
 2014-04-16  Andrew  Pinski  <apinski@cavium.com>
 
 	* config/host-linux.c (TRY_EMPTY_VM_SPACE): Change aarch64 ilp32
diff --git a/gcc/ipa.c b/gcc/ipa.c
index 26e9b03b9bdb..3d82a39286c6 100644
--- a/gcc/ipa.c
+++ b/gcc/ipa.c
@@ -415,7 +415,18 @@ symtab_remove_unreachable_nodes (bool before_inlining_p, FILE *file)
 			  || !DECL_EXTERNAL (e->callee->decl)
 			  || e->callee->alias
 			  || before_inlining_p))
-		    pointer_set_insert (reachable, e->callee);
+		    {
+		      /* Be sure that we will not optimize out alias target
+			 body.  */
+		      if (DECL_EXTERNAL (e->callee->decl)
+			  && e->callee->alias
+			  && before_inlining_p)
+			{
+		          pointer_set_insert (reachable,
+					      cgraph_function_node (e->callee));
+			}
+		      pointer_set_insert (reachable, e->callee);
+		    }
 		  enqueue_node (e->callee, &first, reachable);
 		}
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8b83cd425ddd..de911fd4f404 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2014-04-16  Jan Hubicka  <hubicka@ucw.cz>
+
+	PR ipa/60854
+	* g++.dg/torture/pr60854.C: New testcase.
+
 2014-04-16  Catherine Moore  <clm@codesourcery.com>
 
 	* gcc.target/mips/umips-store16-2.c: New test.
diff --git a/gcc/testsuite/g++.dg/torture/pr60854.C b/gcc/testsuite/g++.dg/torture/pr60854.C
new file mode 100644
index 000000000000..fa4b2e71ab7e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr60854.C
@@ -0,0 +1,13 @@
+template <typename T>
+class MyClass
+{
+public:
+  __attribute__ ((__always_inline__)) inline MyClass () { ; }
+};
+
+extern template class MyClass<double>;
+
+void Func()
+{
+  MyClass<double> x;
+}