From: Richard Biener <rguenther@suse.de>
Date: Tue, 9 Aug 2016 08:09:21 +0000 (+0000)
Subject: tree-ssa-threadbackward.c (profitable_jump_thread_path): Treat same SSA names related.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fda5c810e17e600a10de691a9b8aa00bdd8be277;p=gcc.git

tree-ssa-threadbackward.c (profitable_jump_thread_path): Treat same SSA names related.

2016-08-09  Richard Biener  <rguenther@suse.de>

	* tree-ssa-threadbackward.c (profitable_jump_thread_path):
        Treat same SSA names related.

From-SVN: r239276
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e71b548253e..9cb04ca01b4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2016-08-09  Richard Biener  <rguenther@suse.de>
+
+	* tree-ssa-threadbackward.c (profitable_jump_thread_path):
+	Treat same SSA names related.
+
 2016-08-09  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/72824
diff --git a/gcc/tree-ssa-threadbackward.c b/gcc/tree-ssa-threadbackward.c
index 234ce50d10c..e05669f8147 100644
--- a/gcc/tree-ssa-threadbackward.c
+++ b/gcc/tree-ssa-threadbackward.c
@@ -207,8 +207,9 @@ profitable_jump_thread_path (vec<basic_block, va_gc> *&path,
 		  /* Note that if both NAME and DST are anonymous
 		     SSA_NAMEs, then we do not have enough information
 		     to consider them associated.  */
-		  if ((SSA_NAME_VAR (dst) != SSA_NAME_VAR (name)
-		       || !SSA_NAME_VAR (dst))
+		  if (dst != name
+		      && (SSA_NAME_VAR (dst) != SSA_NAME_VAR (name)
+			  || !SSA_NAME_VAR (dst))
 		      && !virtual_operand_p (dst))
 		    ++n_insns;
 		}