PR c++/28659

[pf3gnuchains/gcc-fork.git] / gcc / tree-vect-analyze.c

diff --git a/gcc/tree-vect-analyze.c b/gcc/tree-vect-analyze.c
index f631942..f247cd9 100644 (file)
--- a/gcc/tree-vect-analyze.c
+++ b/gcc/tree-vect-analyze.c
@@ -754,7 +754,10 @@ vect_compute_data_ref_alignment (struct data_reference *dr)
 
   if (!base_aligned) 
     {
-      if (!vect_can_force_dr_alignment_p (base, TYPE_ALIGN (vectype)))
+      /* Do not change the alignment of global variables if 
+        flag_section_anchors is enabled.  */
+      if (!vect_can_force_dr_alignment_p (base, TYPE_ALIGN (vectype))
+         || (TREE_STATIC (base) && flag_section_anchors))
        {
          if (vect_print_dump_info (REPORT_DETAILS))
            {
@@ -1334,8 +1337,8 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo)
     fprintf (vect_dump, "=== vect_analyze_data_refs ===");
 
   compute_data_dependences_for_loop (loop, false,
-                                     LOOP_VINFO_DATAREFS (loop_vinfo),
-                                     LOOP_VINFO_DDRS (loop_vinfo));
+                                     &LOOP_VINFO_DATAREFS (loop_vinfo),
+                                     &LOOP_VINFO_DDRS (loop_vinfo));
 
   /* Go through the data-refs, check that the analysis succeeded. Update pointer
      from stmt_vec_info struct to DR and vectype.  */
@@ -1886,7 +1889,8 @@ vect_analyze_loop_form (struct loop *loop)
      that the loop is represented as a do-while (with a proper if-guard
      before the loop if needed), where the loop header contains all the
      executable statements, and the latch is empty.  */
-  if (!empty_block_p (loop->latch))
+  if (!empty_block_p (loop->latch)
+        || phi_nodes (loop->latch))
     {
       if (vect_print_dump_info (REPORT_BAD_FORM_LOOPS))
         fprintf (vect_dump, "not vectorized: unexpected loop form.");