* gcse.c (compute_pre_data): Compute ae_kill using other local

        properties instead of calling compute_ae_kill.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@34839 138bc75d-0d04-0410-961f-82ee72b054a4

2 files changed, 18 insertions, 1 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 231ec258304..6ea02a16a0f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 Mon Jul  3 00:32:47 2000  Jeffrey A Law  (law@cygnus.com)
 
+	* gcse.c (compute_pre_data): Compute ae_kill using other local
+	properties instead of calling compute_ae_kill.
+
 	* alias.c (init_alias_analysis): Do not call
 	prologue_epilogue_contains until after reload has completed.
 
diff --git a/gcc/gcse.c b/gcc/gcse.c
index cc133177caa..0486dc946a4 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -4118,10 +4118,24 @@ free_pre_mem ()
 static void
 compute_pre_data ()
 {
+  int i;
+
   compute_local_properties (transp, comp, antloc, 0);
   compute_transpout ();
   sbitmap_vector_zero (ae_kill, n_basic_blocks);
-  compute_ae_kill (comp, ae_kill);
+
+  /* Compute ae_kill for each basic block using:
+
+     ~(TRANSP | COMP)
+
+     This is significantly after than compute_ae_kill.  */
+
+  for (i = 0; i < n_basic_blocks; i++)
+    {
+      sbitmap_a_or_b (ae_kill[i], transp[i], comp[i]);
+      sbitmap_not (ae_kill[i], ae_kill[i]);
+    }
+
   edge_list = pre_edge_lcm (gcse_file, n_exprs, transp, comp, antloc,
 			    ae_kill, &pre_insert_map, &pre_delete_map);
 }