diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 3f604491e25e..dd13e34348f2 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,21 @@
+2014-11-17  Tom de Vries  <tom@codesourcery.com>
+
+	* gcc.dg/pr43864-2.c: Add -ftree-tail-merge to dg-options.
+	* gcc.dg/pr43864-3.c: Same.
+	* gcc.dg/pr43864-4.c: Same.
+	* gcc.dg/pr43864.c: Same.
+	* gcc.dg/pr50763.c: Same.
+	* gcc.dg/pr51879-12.c: Same.
+	* gcc.dg/pr51879-16.c: Same.
+	* gcc.dg/pr51879-17.c: Same.
+	* gcc.dg/pr51879-18.c: Same.
+	* gcc.dg/pr51879-2.c: Same.
+	* gcc.dg/pr51879-3.c: Same.
+	* gcc.dg/pr51879-4.c: Same.
+	* gcc.dg/pr51879-6.c: Same.
+	* gcc.dg/pr51879-7.c: Same.
+	* gcc.dg/pr51879.c: Same.
+
 2014-11-17  Tom de Vries  <tom@codesourcery.com>
 
 	* gcc.dg/pr43864-2.c: Fix scan-tree-dump-times scan pattern.
diff --git a/gcc/testsuite/gcc.dg/pr43864-2.c b/gcc/testsuite/gcc.dg/pr43864-2.c
index 6f531ba02d5d..c576dbd1e412 100644
--- a/gcc/testsuite/gcc.dg/pr43864-2.c
+++ b/gcc/testsuite/gcc.dg/pr43864-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int
 f (int c, int b, int d)
diff --git a/gcc/testsuite/gcc.dg/pr43864-3.c b/gcc/testsuite/gcc.dg/pr43864-3.c
index f013ff52eb80..7956450105e7 100644
--- a/gcc/testsuite/gcc.dg/pr43864-3.c
+++ b/gcc/testsuite/gcc.dg/pr43864-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 /* Commutative case.  */
 
diff --git a/gcc/testsuite/gcc.dg/pr43864-4.c b/gcc/testsuite/gcc.dg/pr43864-4.c
index 488206ed17fe..7353b3d5606f 100644
--- a/gcc/testsuite/gcc.dg/pr43864-4.c
+++ b/gcc/testsuite/gcc.dg/pr43864-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 /* Different stmt order.  */
 
diff --git a/gcc/testsuite/gcc.dg/pr43864.c b/gcc/testsuite/gcc.dg/pr43864.c
index 8d1e989fb18d..a644e21f8fcc 100644
--- a/gcc/testsuite/gcc.dg/pr43864.c
+++ b/gcc/testsuite/gcc.dg/pr43864.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 extern void foo (char*, int);
 extern void mysprintf (char *, char *);
diff --git a/gcc/testsuite/gcc.dg/pr50763.c b/gcc/testsuite/gcc.dg/pr50763.c
index 695b61c75f02..8201fd357a4f 100644
--- a/gcc/testsuite/gcc.dg/pr50763.c
+++ b/gcc/testsuite/gcc.dg/pr50763.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fno-tree-dominator-opts -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fno-tree-dominator-opts -fdump-tree-pre" } */
 
 int bar (int i);
 
diff --git a/gcc/testsuite/gcc.dg/pr51879-12.c b/gcc/testsuite/gcc.dg/pr51879-12.c
index 1b25e296fbfb..8126505f3844 100644
--- a/gcc/testsuite/gcc.dg/pr51879-12.c
+++ b/gcc/testsuite/gcc.dg/pr51879-12.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 __attribute__((pure)) int bar (int);
 __attribute__((pure)) int bar2 (int);
diff --git a/gcc/testsuite/gcc.dg/pr51879-16.c b/gcc/testsuite/gcc.dg/pr51879-16.c
index 3a84e9746933..789709447902 100644
--- a/gcc/testsuite/gcc.dg/pr51879-16.c
+++ b/gcc/testsuite/gcc.dg/pr51879-16.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 struct S {
   int i;
diff --git a/gcc/testsuite/gcc.dg/pr51879-17.c b/gcc/testsuite/gcc.dg/pr51879-17.c
index 806fe7b0f61a..8a2fe5efc2ac 100644
--- a/gcc/testsuite/gcc.dg/pr51879-17.c
+++ b/gcc/testsuite/gcc.dg/pr51879-17.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 struct S {
   int i;
diff --git a/gcc/testsuite/gcc.dg/pr51879-18.c b/gcc/testsuite/gcc.dg/pr51879-18.c
index 95629f12261d..8de3557f9595 100644
--- a/gcc/testsuite/gcc.dg/pr51879-18.c
+++ b/gcc/testsuite/gcc.dg/pr51879-18.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre -fno-tree-copy-prop -fno-tree-dominator-opts -fno-tree-copyrename" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre -fno-tree-copy-prop -fno-tree-dominator-opts -fno-tree-copyrename" } */
 
 extern int foo (void);
 
diff --git a/gcc/testsuite/gcc.dg/pr51879-2.c b/gcc/testsuite/gcc.dg/pr51879-2.c
index db385cba4a51..78acd1fb1703 100644
--- a/gcc/testsuite/gcc.dg/pr51879-2.c
+++ b/gcc/testsuite/gcc.dg/pr51879-2.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int bar (int);
 void baz (int);
diff --git a/gcc/testsuite/gcc.dg/pr51879-3.c b/gcc/testsuite/gcc.dg/pr51879-3.c
index be4b37432288..90f0041c9818 100644
--- a/gcc/testsuite/gcc.dg/pr51879-3.c
+++ b/gcc/testsuite/gcc.dg/pr51879-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int bar (int);
 void baz (int);
diff --git a/gcc/testsuite/gcc.dg/pr51879-4.c b/gcc/testsuite/gcc.dg/pr51879-4.c
index 5cb47afdb5d7..1a9b76e7b4b4 100644
--- a/gcc/testsuite/gcc.dg/pr51879-4.c
+++ b/gcc/testsuite/gcc.dg/pr51879-4.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int bar (int);
 void baz (int);
diff --git a/gcc/testsuite/gcc.dg/pr51879-6.c b/gcc/testsuite/gcc.dg/pr51879-6.c
index 8362a170018f..3d83590631a9 100644
--- a/gcc/testsuite/gcc.dg/pr51879-6.c
+++ b/gcc/testsuite/gcc.dg/pr51879-6.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 
 int bar (int);
diff --git a/gcc/testsuite/gcc.dg/pr51879-7.c b/gcc/testsuite/gcc.dg/pr51879-7.c
index 8a699a1dbdef..5fdf31929372 100644
--- a/gcc/testsuite/gcc.dg/pr51879-7.c
+++ b/gcc/testsuite/gcc.dg/pr51879-7.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int z;
 
diff --git a/gcc/testsuite/gcc.dg/pr51879.c b/gcc/testsuite/gcc.dg/pr51879.c
index 060624fd679e..ac4a4ccafcbd 100644
--- a/gcc/testsuite/gcc.dg/pr51879.c
+++ b/gcc/testsuite/gcc.dg/pr51879.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O2 -fdump-tree-pre" } */
+/* { dg-options "-O2 -ftree-tail-merge -fdump-tree-pre" } */
 
 int bar (int);
 void baz (int);