2006-11-08 Tobias Burnus <burnus@net-b.de>

[pf3gnuchains/gcc-fork.git] / gcc / cfgexpand.c

diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c
index 941cdad..b688917 100644 (file)
--- a/gcc/cfgexpand.c
+++ b/gcc/cfgexpand.c
@@ -58,7 +58,9 @@ add_reg_br_prob_note (rtx last, int probability)
        if (!any_condjump_p (last)
            || !JUMP_P (NEXT_INSN (last))
            || !simplejump_p (NEXT_INSN (last))
+           || !NEXT_INSN (NEXT_INSN (last))
            || !BARRIER_P (NEXT_INSN (NEXT_INSN (last)))
+           || !NEXT_INSN (NEXT_INSN (NEXT_INSN (last)))
            || !LABEL_P (NEXT_INSN (NEXT_INSN (NEXT_INSN (last))))
            || NEXT_INSN (NEXT_INSN (NEXT_INSN (NEXT_INSN (last)))))
          goto failed;
@@ -348,11 +350,19 @@ stack_var_size_cmp (const void *a, const void *b)
 {
   HOST_WIDE_INT sa = stack_vars[*(const size_t *)a].size;
   HOST_WIDE_INT sb = stack_vars[*(const size_t *)b].size;
+  unsigned int uida = DECL_UID (stack_vars[*(const size_t *)a].decl);
+  unsigned int uidb = DECL_UID (stack_vars[*(const size_t *)b].decl);
 
   if (sa < sb)
     return -1;
   if (sa > sb)
     return 1;
+  /* For stack variables of the same size use the uid of the decl
+     to make the sort stable.  */
+  if (uida < uidb)
+    return -1;
+  if (uida > uidb)
+    return 1;
   return 0;
 }
 
@@ -754,7 +764,12 @@ expand_used_vars_for_block (tree block, bool toplevel)
 
   /* Expand all variables at this level.  */
   for (t = BLOCK_VARS (block); t ; t = TREE_CHAIN (t))
-    if (TREE_USED (t))
+    if (TREE_USED (t)
+       /* Force local static variables to be output when marked by
+          used attribute.  For unit-at-a-time, cgraph code already takes
+          care of this.  */
+       || (!flag_unit_at_a_time && TREE_STATIC (t)
+           && DECL_PRESERVE_P (t)))
       expand_one_var (t, toplevel);
 
   this_sv_num = stack_vars_num;
@@ -1580,6 +1595,8 @@ tree_expand_cfg (void)
 {
   basic_block bb, init_block;
   sbitmap blocks;
+  edge_iterator ei;
+  edge e;
 
   /* Some backends want to know that we are expanding to RTL.  */
   currently_expanding_to_rtl = 1;
@@ -1623,6 +1640,11 @@ tree_expand_cfg (void)
 
   init_block = construct_init_block ();
 
+  /* Clear EDGE_EXECUTABLE on the entry edge(s).  It is cleaned from the
+     remaining edges in expand_gimple_basic_block.  */
+  FOR_EACH_EDGE (e, ei, ENTRY_BLOCK_PTR->succs)
+    e->flags &= ~EDGE_EXECUTABLE;
+
   FOR_BB_BETWEEN (bb, init_block->next_bb, EXIT_BLOCK_PTR, next_bb)
     bb = expand_gimple_basic_block (bb);