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 fcf8e965f99472b211d7ac1ded9a4914b0f6c015..142715bbc69ba2e01dec8548dddd743176db239d 100644 (file)
--- 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 556c38a4fb0faa42bd97dda4b033b4a621418b07..4577c8e1c51b2fa91ad1988634bc06f21df0bfc3 100644 (file)
--- 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;