[PATCH] Properly sum costs in tree-vect-loop.c (PR tree-optimization/90973).

[Martin Liška]

Hi.

That's a thinko that's pre-approved by Richi.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Thanks,
Martin

gcc/ChangeLog:

2019-06-24  Martin Liska  <mli...@suse.cz>

        PR tree-optimization/90973
        * tree-vect-loop.c (vect_get_known_peeling_cost): Sum retval
        of prologue and epilogue.
---
 gcc/tree-vect-loop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)



diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index d3facf67bf9..489bee65397 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -3405,8 +3405,8 @@ vect_get_known_peeling_cost (loop_vec_info loop_vinfo, int peel_iters_prologue,
          iterations are unknown, count a taken branch per peeled loop.  */
       retval = record_stmt_cost (prologue_cost_vec, 1, cond_branch_taken,
 				 NULL, 0, vect_prologue);
-      retval = record_stmt_cost (prologue_cost_vec, 1, cond_branch_taken,
-				 NULL, 0, vect_epilogue);
+      retval += record_stmt_cost (prologue_cost_vec, 1, cond_branch_taken,
+				  NULL, 0, vect_epilogue);
     }
   else
     {