re PR tree-optimization/50730 (SLP vectorization confused by unrelated DRs)

        PR tree-optimization/50730
        * tree-vect-data-refs.c (vect_analyze_data_refs): Stop basic
        block analysis if encountered unsupported data-ref.

From-SVN: r180367

1 files changed, 49 insertions, 2 deletions

diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c
index 3634e5e..4b6164a 100644
--- a/gcc/tree-vect-data-refs.c
+++ b/gcc/tree-vect-data-refs.c
@@ -2524,7 +2524,7 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
   VEC (data_reference_p, heap) *datarefs;
   struct data_reference *dr;
   tree scalar_type;
-  bool res;
+  bool res, stop_bb_analysis = false;
 
   if (vect_print_dump_info (REPORT_DETAILS))
     fprintf (vect_dump, "=== vect_analyze_data_refs ===\n");
@@ -2579,12 +2579,19 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
         {
           if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
 	    fprintf (vect_dump, "not vectorized: unhandled data-ref ");
+
           return false;
         }
 
       stmt = DR_STMT (dr);
       stmt_info = vinfo_for_stmt (stmt);
 
+      if (stop_bb_analysis)
+        {
+          STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+          continue;
+        }
+
       /* Check that analysis of the data-ref succeeded.  */
       if (!DR_BASE_ADDRESS (dr) || !DR_OFFSET (dr) || !DR_INIT (dr)
           || !DR_STEP (dr))
@@ -2595,6 +2602,13 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
               print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
             }
 
+          if (bb_vinfo)
+            {
+              STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
+              continue;
+            }
+
           return false;
         }
 
@@ -2603,7 +2617,15 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
           if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS))
             fprintf (vect_dump, "not vectorized: base addr of dr is a "
                      "constant");
-          return false;
+
+          if (bb_vinfo)
+            {
+              STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
+              continue;
+            }
+
+           return false;
         }
 
       if (TREE_THIS_VOLATILE (DR_REF (dr)))
@@ -2613,6 +2635,14 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
               fprintf (vect_dump, "not vectorized: volatile type ");
               print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
             }
+
+          if (bb_vinfo)
+            {
+              STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
+              continue;
+            }
+
           return false;
         }
 
@@ -2628,6 +2658,14 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
                        "exception ");
               print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
             }
+
+          if (bb_vinfo)
+            {
+              STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
+              continue;
+            }
+
           return false;
         }
 
@@ -2745,6 +2783,14 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
                        "not vectorized: more than one data ref in stmt: ");
               print_gimple_stmt (vect_dump, stmt, 0, TDF_SLIM);
             }
+
+          if (bb_vinfo)
+            {
+              STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
+              continue;
+            }
+
           return false;
         }
 
@@ -2769,6 +2815,7 @@ vect_analyze_data_refs (loop_vec_info loop_vinfo,
             {
               /* Mark the statement as not vectorizable.  */
               STMT_VINFO_VECTORIZABLE (stmt_info) = false;
+              stop_bb_analysis = true;
               continue;
             }
           else