From: law <law@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 22 Dec 2015 03:09:08 +0000 (+0000)
Subject: 	* dbgcnt.def (dom_unreachable_edges): New debug counter.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b865d47e976bcf52c4f81dfe9aeec3bbc1b13a6f;p=thirdparty%2Fgcc.git

	* dbgcnt.def (dom_unreachable_edges): New debug counter.
	* tree-ssa-dom.c: Include dbgcnt.h
	(dom_opt_dom_walker::before_dom_children): Handle the new counter.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231896 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f1f1d69a1d6e..9e3ab5aaf92d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2015-12-21  Jeff Law  <law@redhat.com>
+
+	* dbgcnt.def (dom_unreachable_edges): New debug counter.
+	* tree-ssa-dom.c: Include dbgcnt.h
+	(dom_opt_dom_walker::before_dom_children): Handle the new counter.
+
 2015-12-21  Andrew Pinski <apinski@cavium.com>
 
 	* config/aarch64/aarch64-option-extensions.def (LSE): Change
diff --git a/gcc/dbgcnt.def b/gcc/dbgcnt.def
index 583b16b0f4fc..65f18fbfdf45 100644
--- a/gcc/dbgcnt.def
+++ b/gcc/dbgcnt.def
@@ -192,3 +192,4 @@ DEBUG_COUNTER (treepre_insert)
 DEBUG_COUNTER (tree_sra)
 DEBUG_COUNTER (vect_loop)
 DEBUG_COUNTER (vect_slp)
+DEBUG_COUNTER (dom_unreachable_edges)
diff --git a/gcc/tree-ssa-dom.c b/gcc/tree-ssa-dom.c
index 88fc517900c5..1b689a05126e 100644
--- a/gcc/tree-ssa-dom.c
+++ b/gcc/tree-ssa-dom.c
@@ -44,6 +44,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-ssa-dom.h"
 #include "gimplify.h"
 #include "tree-cfgcleanup.h"
+#include "dbgcnt.h"
 
 /* This file implements optimizations on the dominator tree.  */
 
@@ -1369,6 +1370,9 @@ dom_opt_dom_walker::before_dom_children (basic_block bb)
   /* Now prepare to process dominated blocks.  */
   record_edge_info (bb);
   cprop_into_successor_phis (bb, m_const_and_copies);
+  if (taken_edge && !dbg_cnt (dom_unreachable_edges))
+    return NULL;
+
   return taken_edge;
 }