[PATCH 3/3] Fix ubsan tests by disabling of an optimization.

[mliska]

---
 gcc/testsuite/g++.dg/ubsan/vptr-1.C | 2 +-
 gcc/testsuite/g++.dg/ubsan/vptr-2.C | 2 +-
 gcc/testsuite/g++.dg/ubsan/vptr-3.C | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/testsuite/g++.dg/ubsan/vptr-1.C 
b/gcc/testsuite/g++.dg/ubsan/vptr-1.C
index f4260c1..2183575 100644
--- a/gcc/testsuite/g++.dg/ubsan/vptr-1.C
+++ b/gcc/testsuite/g++.dg/ubsan/vptr-1.C
@@ -1,5 +1,5 @@
 // { dg-do run { target { ilp32 || lp64 } } }
-// { dg-options "-fsanitize=vptr" }
+// { dg-options "-fsanitize=vptr -fno-tree-tail-merge" }
 
 struct S
 {
diff --git a/gcc/testsuite/g++.dg/ubsan/vptr-2.C 
b/gcc/testsuite/g++.dg/ubsan/vptr-2.C
index 2aa7046..30047f0 100644
--- a/gcc/testsuite/g++.dg/ubsan/vptr-2.C
+++ b/gcc/testsuite/g++.dg/ubsan/vptr-2.C
@@ -1,5 +1,5 @@
 // { dg-do run { target { ilp32 || lp64 } } }
-// { dg-options "-fsanitize=vptr" }
+// { dg-options "-fsanitize=vptr -fno-tree-tail-merge" }
 
 struct S
 {
diff --git a/gcc/testsuite/g++.dg/ubsan/vptr-3.C 
b/gcc/testsuite/g++.dg/ubsan/vptr-3.C
index 916d8ef..71c52bd 100644
--- a/gcc/testsuite/g++.dg/ubsan/vptr-3.C
+++ b/gcc/testsuite/g++.dg/ubsan/vptr-3.C
@@ -1,5 +1,5 @@
 // { dg-do run { target { ilp32 || lp64 } } }
-// { dg-options "-fsanitize=vptr" }
+// { dg-options "-fsanitize=vptr -fno-tree-tail-merge" }
 
 struct S
 {
-- 
2.4.5