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[pf3gnuchains/gcc-fork.git] / gcc / sched-deps.c

diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 9abb92d..dddf836 100644 (file)
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -26,6 +26,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "system.h"
 #include "coretypes.h"
 #include "tm.h"
+#include "diagnostic-core.h"
 #include "toplev.h"
 #include "rtl.h"
 #include "tm_p.h"
@@ -1407,7 +1408,10 @@ 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;
@@ -1517,9 +1521,7 @@ fixup_sched_groups (rtx insn)
 
   delete_all_dependences (insn);
 
-  prev_nonnote = prev_nonnote_insn (insn);
-  while (DEBUG_INSN_P (prev_nonnote))
-    prev_nonnote = prev_nonnote_insn (prev_nonnote);
+  prev_nonnote = prev_nonnote_nondebug_insn (insn);
   if (BLOCK_FOR_INSN (insn) == BLOCK_FOR_INSN (prev_nonnote)
       && ! sched_insns_conditions_mutex_p (insn, prev_nonnote))
     add_dependence (insn, prev_nonnote, REG_DEP_ANTI);
@@ -2695,9 +2697,7 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx insn)
   if (JUMP_P (insn))
     {
       rtx next;
-      next = next_nonnote_insn (insn);
-      while (next && DEBUG_INSN_P (next))
-       next = next_nonnote_insn (next);
+      next = next_nonnote_nondebug_insn (insn);
       if (next && BARRIER_P (next))
        reg_pending_barrier = MOVE_BARRIER;
       else
@@ -3366,10 +3366,8 @@ deps_start_bb (struct deps_desc *deps, rtx head)
      hard registers correct.  */
   if (! reload_completed && !LABEL_P (head))
     {
-      rtx insn = prev_nonnote_insn (head);
+      rtx insn = prev_nonnote_nondebug_insn (head);
 
-      while (insn && DEBUG_INSN_P (insn))
-       insn = prev_nonnote_insn (insn);
       if (insn && CALL_P (insn))
        deps->in_post_call_group_p = post_call_initial;
     }
@@ -4077,7 +4075,7 @@ dump_ds (FILE *f, ds_t s)
   fprintf (f, "}");
 }
 
-void
+DEBUG_FUNCTION void
 debug_ds (ds_t s)
 {
   dump_ds (stderr, s);