From: Alexandre Oliva <aoliva@redhat.com>
Date: Fri, 4 Jun 2010 16:43:42 +0000 (+0000)
Subject: re PR rtl-optimization/44013 (VTA produces wrong code)
X-Git-Tag: releases/gcc-4.6.0~6764
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=39e7207ad9ffdf6d8059a28be8c940e78ef0fe7c;p=thirdparty%2Fgcc.git

re PR rtl-optimization/44013 (VTA produces wrong code)

	PR rtl-optimization/44013
	* sched-deps.c (add_dependence_list_and_free): Don't free lists
	when processing debug insns.

From-SVN: r160281
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index fcf8e965f994..142715bbc69b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,9 @@
 2010-06-04  Alexandre Oliva  <aoliva@redhat.com>
 
+	PR rtl-optimization/44013
+	* sched-deps.c (add_dependence_list_and_free): Don't free lists
+	when processing debug insns.
+
 	PR debug/41371
 	* var-tracking.c (find_loc_in_1pdv): Mark initial value before
 	recursing.  Check that recursion is bounded.  Rename inner var
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 556c38a4fb0f..4577c8e1c51b 100644
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -1407,7 +1407,10 @@ add_dependence_list_and_free (struct deps_desc *deps, rtx insn, rtx *listp,
 {
   rtx list, next;
 
-  if (deps->readonly)
+  /* We don't want to short-circuit dependencies involving debug
+     insns, because they may cause actual dependencies to be
+     disregarded.  */
+  if (deps->readonly || DEBUG_INSN_P (insn))
     {
       add_dependence_list (insn, *listp, uncond, dep_type);
       return;