From: Jeff Law <law@redhat.com>
Date: Tue, 28 Dec 2004 06:34:55 +0000 (-0700)
Subject: tree-ssa-dom.c (thread_across_edge): Remove broken code to avoid threading into a... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=685c2171c1b55fdac1bd276c54d9bea41d872373;p=gcc.git

tree-ssa-dom.c (thread_across_edge): Remove broken code to avoid threading into a loop.

        * tree-ssa-dom.c (thread_across_edge): Remove broken code to
        avoid threading into a loop.

From-SVN: r92666
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9f1531ed77c..5526fcb685e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-12-27  Jeff Law  <law@redhat.com>
+
+	* tree-ssa-dom.c (thread_across_edge): Remove broken code to
+	avoid threading into a loop.
+
 2004-12-27  Richard Henderson  <rth@redhat.com>
 
 	PR target/17406
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c
index 81fdb0e8652..67446b1432f 100644
--- a/gcc/tree-ssa-dom.c
+++ b/gcc/tree-ssa-dom.c
@@ -686,22 +686,6 @@ thread_across_edge (struct dom_walk_data *walk_data, edge e)
 	  || TREE_CODE (stmt) == SWITCH_EXPR))
     {
       tree cond, cached_lhs;
-      edge e1;
-      edge_iterator ei;
-
-      /* Do not forward entry edges into the loop.  In the case loop
-	 has multiple entry edges we may end up in constructing irreducible
-	 region.  
-	 ??? We may consider forwarding the edges in the case all incoming
-	 edges forward to the same destination block.  */
-      if (!e->flags & EDGE_DFS_BACK)
-	{
-	  FOR_EACH_EDGE (e1, ei, e->dest->preds)
-	    if (e1->flags & EDGE_DFS_BACK)
-	      break;
-	  if (e1)
-	    return;
-	}
 
       /* Now temporarily cprop the operands and try to find the resulting
 	 expression in the hash tables.  */