[21/46] Make grouped_stores and reduction_chains use stmt_vec_infos

This patch changes the SLP lists grouped_stores and reduction_chains
from auto_vec<gimple *> to auto_vec<stmt_vec_info>.  It was easier
to do them together due to the way vect_analyze_slp is structured.

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

gcc/
	* tree-vectorizer.h (vec_info::grouped_stores): Change from
	an auto_vec<gimple *> to an auto_vec<stmt_vec_info>.
	(_loop_vec_info::reduction_chains): Likewise.
	* tree-vect-loop.c (vect_fixup_scalar_cycles_with_patterns): Update
	accordingly.
	* tree-vect-slp.c (vect_analyze_slp): Likewise.

From-SVN: r263136

gcc/ChangeLog

 2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
 
+	* tree-vectorizer.h (vec_info::grouped_stores): Change from
+	an auto_vec<gimple *> to an auto_vec<stmt_vec_info>.
+	(_loop_vec_info::reduction_chains): Likewise.
+	* tree-vect-loop.c (vect_fixup_scalar_cycles_with_patterns): Update
+	accordingly.
+	* tree-vect-slp.c (vect_analyze_slp): Likewise.
+
+2018-07-31  Richard Sandiford  <richard.sandiford@arm.com>
+
 	* tree-vectorizer.h (_stmt_vec_info::first_element): Change from
 	a gimple stmt to a stmt_vec_info.
 	(_stmt_vec_info::next_element): Likewise.

gcc/tree-vect-loop.c

@@ -677,13 +677,13 @@ vect_fixup_reduc_chain (gimple *stmt)
 static void
 vect_fixup_scalar_cycles_with_patterns (loop_vec_info loop_vinfo)
 {
-  gimple *first;
+  stmt_vec_info first;
   unsigned i;
 
   FOR_EACH_VEC_ELT (LOOP_VINFO_REDUCTION_CHAINS (loop_vinfo), i, first)
-    if (STMT_VINFO_IN_PATTERN_P (vinfo_for_stmt (first)))
+    if (STMT_VINFO_IN_PATTERN_P (first))
       {
-	stmt_vec_info next = REDUC_GROUP_NEXT_ELEMENT (vinfo_for_stmt (first));
+	stmt_vec_info next = REDUC_GROUP_NEXT_ELEMENT (first);
 	while (next)
 	  {
 	    if (! STMT_VINFO_IN_PATTERN_P (next))
@@ -696,7 +696,7 @@ vect_fixup_scalar_cycles_with_patterns (loop_vec_info loop_vinfo)
 	  {
 	    vect_fixup_reduc_chain (first);
 	    LOOP_VINFO_REDUCTION_CHAINS (loop_vinfo)[i]
-	      = STMT_VINFO_RELATED_STMT (vinfo_for_stmt (first));
+	      = STMT_VINFO_RELATED_STMT (first);
 	  }
       }
 }

gcc/tree-vect-slp.c

@@ -2202,7 +2202,7 @@ bool
 vect_analyze_slp (vec_info *vinfo, unsigned max_tree_size)
 {
   unsigned int i;
-  gimple *first_element;
+  stmt_vec_info first_element;
 
   DUMP_VECT_SCOPE ("vect_analyze_slp");
 
@@ -2220,17 +2220,15 @@ vect_analyze_slp (vec_info *vinfo, unsigned max_tree_size)
 					     max_tree_size))
 	      {
 		/* Dissolve reduction chain group.  */
-		gimple *stmt = first_element;
-		while (stmt)
+		stmt_vec_info vinfo = first_element;
+		while (vinfo)
 		  {
-		    stmt_vec_info vinfo = vinfo_for_stmt (stmt);
 		    stmt_vec_info next = REDUC_GROUP_NEXT_ELEMENT (vinfo);
 		    REDUC_GROUP_FIRST_ELEMENT (vinfo) = NULL;
 		    REDUC_GROUP_NEXT_ELEMENT (vinfo) = NULL;
-		    stmt = next;
+		    vinfo = next;
 		  }
-		STMT_VINFO_DEF_TYPE (vinfo_for_stmt (first_element))
-		  = vect_internal_def;
+		STMT_VINFO_DEF_TYPE (first_element) = vect_internal_def;
 	      }
 	}
 

gcc/tree-vectorizer.h

@@ -259,7 +259,7 @@ struct vec_info {
 
   /* All interleaving chains of stores, represented by the first
      stmt in the chain.  */
-  auto_vec<gimple *> grouped_stores;
+  auto_vec<stmt_vec_info> grouped_stores;
 
   /* Cost data used by the target cost model.  */
   void *target_cost_data;
@@ -479,7 +479,7 @@ typedef struct _loop_vec_info : public vec_info {
 
   /* All reduction chains in the loop, represented by the first
      stmt in the chain.  */
-  auto_vec<gimple *> reduction_chains;
+  auto_vec<stmt_vec_info> reduction_chains;
 
   /* Cost vector for a single scalar iteration.  */
   auto_vec<stmt_info_for_cost> scalar_cost_vec;