* tree-ssa-live.c (remove_unused_scope_block_p): Don't change

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-live.c

diff --git a/gcc/tree-ssa-live.c b/gcc/tree-ssa-live.c
index a78dd9c..4cf6620 100644 (file)
--- a/gcc/tree-ssa-live.c
+++ b/gcc/tree-ssa-live.c
@@ -468,39 +468,10 @@ mark_scope_block_unused (tree scope)
 static bool
 remove_unused_scope_block_p (tree scope)
 {
-  tree *t, *next;
+  tree *t;
   bool unused = !TREE_USED (scope);
-  var_ann_t ann;
   int nsubblocks = 0;
 
-  for (t = &BLOCK_VARS (scope); *t; t = next)
-    {
-      next = &TREE_CHAIN (*t);
-
-      /* Debug info of nested function refers to the block of the
-        function.  */
-      if (TREE_CODE (*t) == FUNCTION_DECL)
-       unused = false;
-
-      /* When we are outputting debug info, we usually want to output
-        info about optimized-out variables in the scope blocks.
-        Exception are the scope blocks not containing any instructions
-        at all so user can't get into the scopes at first place.  */
-      else if ((ann = var_ann (*t)) != NULL
-               && ann->used)
-       unused = false;
-
-      /* When we are not doing full debug info, we however can keep around
-        only the used variables for cfgexpand's memory packing saving quite
-        a lot of memory.  */
-      else if (debug_info_level != DINFO_LEVEL_NORMAL
-              && debug_info_level != DINFO_LEVEL_VERBOSE)
-       {
-         *t = TREE_CHAIN (*t);
-         next = t;
-       }
-    }
-
   for (t = &BLOCK_SUBBLOCKS (scope); *t ;)
     if (remove_unused_scope_block_p (*t))
       {
@@ -533,12 +504,10 @@ remove_unused_scope_block_p (tree scope)
    /* When there is only one subblock, see if it is just wrapper we can
       ignore.  Wrappers are not declaring any variables and not changing
       abstract origin.  */
-   else if (nsubblocks == 1
+   else if (nsubblocks <= 1
            && (BLOCK_VARS (scope)
-               || ((debug_info_level == DINFO_LEVEL_NORMAL
-                    || debug_info_level == DINFO_LEVEL_VERBOSE)
-                   && ((BLOCK_ABSTRACT_ORIGIN (scope)
-                       != BLOCK_ABSTRACT_ORIGIN (BLOCK_SUPERCONTEXT (scope)))))))
+               || (BLOCK_ABSTRACT_ORIGIN (scope)
+                   != BLOCK_ABSTRACT_ORIGIN (BLOCK_SUPERCONTEXT (scope)))))
      unused = false;
    return unused;
 }