[23/46] Make LOOP_VINFO_MAY_MISALIGN_STMTS use stmt_vec_info

This patch changes LOOP_VINFO_MAY_MISALIGN_STMTS from an
auto_vec<gimple *> to an auto_vec<stmt_vec_info>.

2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vectorizer.h (_loop_vec_info::may_misalign_stmts): Change
	from an auto_vec<gimple *> to an auto_vec<stmt_vec_info>.
	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Update
	accordingly.
	* tree-vect-loop-manip.c (vect_create_cond_for_align_checks): Likewise.

From-SVN: r263138

gcc/ChangeLog

 2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* tree-vectorizer.h (_loop_vec_info::may_misalign_stmts): Change
+	from an auto_vec<gimple *> to an auto_vec<stmt_vec_info>.
+	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment): Update
+	accordingly.
+	* tree-vect-loop-manip.c (vect_create_cond_for_align_checks): Likewise.
+
+2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* tree-vectorizer.h (_stmt_vec_info::same_dr_stmt): Change from
 	a gimple stmt to a stmt_vec_info.
 	* tree-vect-stmts.c (vectorizable_load): Update accordingly.

gcc/tree-vect-data-refs.c

@@ -2231,16 +2231,15 @@ vect_enhance_data_refs_alignment (loop_vec_info loop_vinfo)
 
   if (do_versioning)
     {
-      vec<gimple *> may_misalign_stmts
+      vec<stmt_vec_info> may_misalign_stmts
         = LOOP_VINFO_MAY_MISALIGN_STMTS (loop_vinfo);
-      gimple *stmt;
+      stmt_vec_info stmt_info;
 
       /* It can now be assumed that the data references in the statements
          in LOOP_VINFO_MAY_MISALIGN_STMTS will be aligned in the version
          of the loop being vectorized.  */
-      FOR_EACH_VEC_ELT (may_misalign_stmts, i, stmt)
+      FOR_EACH_VEC_ELT (may_misalign_stmts, i, stmt_info)
         {
-          stmt_vec_info stmt_info = vinfo_for_stmt (stmt);
           dr = STMT_VINFO_DATA_REF (stmt_info);
 	  SET_DR_MISALIGNMENT (dr, 0);
 	  if (dump_enabled_p ())

gcc/tree-vect-loop-manip.c

@@ -2772,9 +2772,9 @@ vect_create_cond_for_align_checks (loop_vec_info loop_vinfo,
                                    tree *cond_expr,
 				   gimple_seq *cond_expr_stmt_list)
 {
-  vec<gimple *> may_misalign_stmts
+  vec<stmt_vec_info> may_misalign_stmts
     = LOOP_VINFO_MAY_MISALIGN_STMTS (loop_vinfo);
-  gimple *ref_stmt;
+  stmt_vec_info stmt_info;
   int mask = LOOP_VINFO_PTR_MASK (loop_vinfo);
   tree mask_cst;
   unsigned int i;
@@ -2795,23 +2795,22 @@ vect_create_cond_for_align_checks (loop_vec_info loop_vinfo,
   /* Create expression (mask & (dr_1 || ... || dr_n)) where dr_i is the address
      of the first vector of the i'th data reference. */
 
-  FOR_EACH_VEC_ELT (may_misalign_stmts, i, ref_stmt)
+  FOR_EACH_VEC_ELT (may_misalign_stmts, i, stmt_info)
     {
       gimple_seq new_stmt_list = NULL;
       tree addr_base;
       tree addr_tmp_name;
       tree new_or_tmp_name;
       gimple *addr_stmt, *or_stmt;
-      stmt_vec_info stmt_vinfo = vinfo_for_stmt (ref_stmt);
-      tree vectype = STMT_VINFO_VECTYPE (stmt_vinfo);
+      tree vectype = STMT_VINFO_VECTYPE (stmt_info);
       bool negative = tree_int_cst_compare
-	(DR_STEP (STMT_VINFO_DATA_REF (stmt_vinfo)), size_zero_node) < 0;
+	(DR_STEP (STMT_VINFO_DATA_REF (stmt_info)), size_zero_node) < 0;
       tree offset = negative
 	? size_int (-TYPE_VECTOR_SUBPARTS (vectype) + 1) : size_zero_node;
 
       /* create: addr_tmp = (int)(address_of_first_vector) */
       addr_base =
-	vect_create_addr_base_for_vector_ref (ref_stmt, &new_stmt_list,
+	vect_create_addr_base_for_vector_ref (stmt_info, &new_stmt_list,
 					      offset);
       if (new_stmt_list != NULL)
 	gimple_seq_add_seq (cond_expr_stmt_list, new_stmt_list);

gcc/tree-vectorizer.h

@@ -472,7 +472,7 @@ typedef struct _loop_vec_info : public vec_info {
 
   /* Statements in the loop that have data references that are candidates for a
      runtime (loop versioning) misalignment check.  */
-  auto_vec<gimple *> may_misalign_stmts;
+  auto_vec<stmt_vec_info> may_misalign_stmts;
 
   /* Reduction cycles detected in the loop. Used in loop-aware SLP.  */
   auto_vec<stmt_vec_info> reductions;