diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 92c18df0e4c947f2e0b5054f62366d2c4c077f39..c4e4ecba51c88e0ee586be0d5e4e9ebcdf6c74d6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,10 @@
+2012-04-05  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+	    Dominique D'Humieures  <dominiq@lps.ens.fr>
+
+	PR testsuite/52614
+	* gcc.dg/vect/vect.exp: Use -fno-common on all targets.
+	* gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp: Likewise.
+
 2012-04-04  Jason Merrill  <jason@redhat.com>
 
 	PR c++/52845
diff --git a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp
index 280b55668c6e5fe619454004ec4f9ea2d6df832c..e19120fec1d5b65cc2e5dad3cabd960e9c0dddfd 100644
--- a/gcc/testsuite/gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp
+++ b/gcc/testsuite/gcc.dg/vect/costmodel/ppc/ppc-costmodel-vect.exp
@@ -34,7 +34,7 @@ if ![is-effective-target powerpc_altivec_ok] {
 set DEFAULT_VECTCFLAGS ""
 
 # These flags are used for all targets.
-lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" "-fvect-cost-model"
+lappend DEFAULT_VECTCFLAGS "-O2" "-ftree-vectorize" "-fvect-cost-model" "-fno-common"
 
 # If the target system supports vector instructions, the default action
 # for a test is 'run', otherwise it's 'compile'.  Save current default.
diff --git a/gcc/testsuite/gcc.dg/vect/vect.exp b/gcc/testsuite/gcc.dg/vect/vect.exp
index b6d4a331133e6607f60128c0086e72790c37ff41..426516325b2a939d0affdc514ae09202dde26f73 100644
--- a/gcc/testsuite/gcc.dg/vect/vect.exp
+++ b/gcc/testsuite/gcc.dg/vect/vect.exp
@@ -40,7 +40,7 @@ if ![check_vect_support_and_set_flags] {
 }
 
 # These flags are used for all targets.
-lappend DEFAULT_VECTCFLAGS "-ftree-vectorize" "-fno-vect-cost-model"
+lappend DEFAULT_VECTCFLAGS "-ftree-vectorize" "-fno-vect-cost-model" "-fno-common"
 
 # Initialize `dg'.
 dg-init