diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7089985c980..ecd37115d82 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2015-11-12  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/68306
+	* tree-vect-data-refs.c (verify_data_ref_alignment): Remove
+	relevant and vectorizable checks here.
+	(vect_verify_datarefs_alignment): Add relevant check here.
+
 2015-11-12  Nathan Sidwell  <nathan@codesourcery.com>
 
 	gcc/
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ace9cfd5234..7d32ad87903 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2015-11-12  Richard Biener  <rguenther@suse.de>
+
+	PR tree-optimization/68306
+	* gcc.dg/pr68306.c: New testcase.
+
 2015-11-12  Ville Voutilainen  <ville.voutilainen@gmail.com>
 
 	Implement D0013R2, logical type traits.
diff --git a/gcc/testsuite/gcc.dg/pr68306.c b/gcc/testsuite/gcc.dg/pr68306.c
new file mode 100644
index 00000000000..b36fb347117
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr68306.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O3" } */
+
+enum powerpc_pmc_type { PPC_PMC_IBM };
+struct {
+    unsigned num_pmcs;
+    enum powerpc_pmc_type pmc_type;
+} a;
+enum powerpc_pmc_type b;
+void fn1() { a.num_pmcs = a.pmc_type = b; }
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index f7471b8a75e..da5b2e98a1c 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -909,14 +909,9 @@ verify_data_ref_alignment (data_reference_p dr)
   gimple *stmt = DR_STMT (dr);
   stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
 
-  if (!STMT_VINFO_RELEVANT_P (stmt_info))
-    return true;
-
-  /* For interleaving, only the alignment of the first access matters. 
-     Skip statements marked as not vectorizable.  */
-  if ((STMT_VINFO_GROUPED_ACCESS (stmt_info)
-       && GROUP_FIRST_ELEMENT (stmt_info) != stmt)
-      || !STMT_VINFO_VECTORIZABLE (stmt_info))
+  /* For interleaving, only the alignment of the first access matters.   */
+  if (STMT_VINFO_GROUPED_ACCESS (stmt_info)
+      && GROUP_FIRST_ELEMENT (stmt_info) != stmt)
     return true;
 
   /* Strided accesses perform only component accesses, alignment is
@@ -965,8 +960,15 @@ vect_verify_datarefs_alignment (loop_vec_info vinfo)
   unsigned int i;
 
   FOR_EACH_VEC_ELT (datarefs, i, dr)
-    if (! verify_data_ref_alignment (dr))
-      return false;
+    {
+      gimple *stmt = DR_STMT (dr);
+      stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
+
+      if (!STMT_VINFO_RELEVANT_P (stmt_info))
+	continue;
+      if (! verify_data_ref_alignment (dr))
+	return false;
+    }
 
   return true;
 }