From: Richard Biener <rguenther@suse.de>
Date: Tue, 22 Aug 2017 09:04:28 +0000 (+0000)
Subject: tree-cfg.c (gimple_split_edge): Avoid reallocating target PHI nodes.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2df8ab3dbaa4f63708f3c53f1ac42a6f0e1f4a75;p=gcc.git

tree-cfg.c (gimple_split_edge): Avoid reallocating target PHI nodes.

2017-08-22  Richard Biener  <rguenther@suse.de>

	* tree-cfg.c (gimple_split_edge): Avoid reallocating target
	PHI nodes.

From-SVN: r251264
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e24f5119334..a32a5d6498b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-08-22  Richard Biener  <rguenther@suse.de>
+
+	* tree-cfg.c (gimple_split_edge): Avoid reallocating target
+	PHI nodes.
+
 2017-08-22  Richard Biener  <rguenther@suse.de>
 
 	* common.opt (feliminate-dwarf2-dups): Ignore.
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index f26b12ff30d..6c355f1ed70 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -2844,10 +2844,11 @@ gimple_split_edge (edge edge_in)
   new_bb = create_empty_bb (after_bb);
   new_bb->frequency = EDGE_FREQUENCY (edge_in);
   new_bb->count = edge_in->count;
-  new_edge = make_single_succ_edge (new_bb, dest, EDGE_FALLTHRU);
 
   e = redirect_edge_and_branch (edge_in, new_bb);
   gcc_assert (e == edge_in);
+
+  new_edge = make_single_succ_edge (new_bb, dest, EDGE_FALLTHRU);
   reinstall_phi_args (new_edge, e);
 
   return new_bb;