diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 731ccf7731e..2142b677bb1 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2014-05-19  Joseph Myers  <joseph@codesourcery.com>
+
+	* lib/target-supports.exp
+	(check_effective_target_vect_sizes_32B_16B): Return false if
+	128-bit AVX vectors preferred.
+
 2014-05-19  Mike Stump  <mikestump@comcast.net>
 
 	* lib/target-supports.exp (check_effective_target_avx): Early out
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 1f921537757..7304f5275ee 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -5285,7 +5285,11 @@ proc check_avx_available { } {
 # Return true if 32- and 16-bytes vectors are available.
 
 proc check_effective_target_vect_sizes_32B_16B { } {
-  return [check_avx_available];
+  if { [check_avx_available] && ![check_prefer_avx128] } {
+     return 1;
+  } else {
+    return 0;
+  }
 }
 
 # Return true if 128-bits vectors are preferred even if 256-bits vectors