2010-04-07 Richard Guenther <rguenther@suse.de>

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

diff --git a/gcc/haifa-sched.c b/gcc/haifa-sched.c
index b7f0cfc..b15fe63 100644 (file)
--- a/gcc/haifa-sched.c
+++ b/gcc/haifa-sched.c
@@ -718,7 +718,7 @@ initiate_bb_reg_pressure_info (basic_block bb)
 
   if (current_nr_blocks > 1)
     FOR_BB_INSNS (bb, insn)
-      if (INSN_P (insn))
+      if (NONDEBUG_INSN_P (insn))
        setup_ref_regs (PATTERN (insn));
   initiate_reg_pressure_info (df_get_live_in (bb));
 #ifdef EH_RETURN_DATA_REGNO
@@ -1586,7 +1586,8 @@ setup_insn_max_reg_pressure (rtx after, bool update_p)
     max_reg_pressure[ira_reg_class_cover[i]]
       = curr_reg_pressure[ira_reg_class_cover[i]];
   for (insn = NEXT_INSN (after);
-       insn != NULL_RTX && BLOCK_FOR_INSN (insn) == BLOCK_FOR_INSN (after);
+       insn != NULL_RTX && ! BARRIER_P (insn)
+        && BLOCK_FOR_INSN (insn) == BLOCK_FOR_INSN (after);
        insn = NEXT_INSN (insn))
     if (NONDEBUG_INSN_P (insn))
       {
@@ -1695,6 +1696,7 @@ schedule_insn (rtx insn)
         sd_iterator_cond (&sd_it, &dep);)
       {
        rtx dbg = DEP_PRO (dep);
+       struct reg_use_data *use, *next;
 
        gcc_assert (DEBUG_INSN_P (dbg));
 
@@ -1716,6 +1718,20 @@ schedule_insn (rtx insn)
        INSN_VAR_LOCATION_LOC (dbg) = gen_rtx_UNKNOWN_VAR_LOC ();
        df_insn_rescan (dbg);
 
+       /* Unknown location doesn't use any registers.  */
+       for (use = INSN_REG_USE_LIST (dbg); use != NULL; use = next)
+         {
+           struct reg_use_data *prev = use;
+
+           /* Remove use from the cyclic next_regno_use chain first.  */
+           while (prev->next_regno_use != use)
+             prev = prev->next_regno_use;
+           prev->next_regno_use = use->next_regno_use;
+           next = use->next_insn_use;
+           free (use);
+         }
+       INSN_REG_USE_LIST (dbg) = NULL;
+
        /* We delete rather than resolve these deps, otherwise we
           crash in sched_free_deps(), because forward deps are
           expected to be released before backward deps.  */