示例#1
0
/* Process every variable mentioned in BIND_EXPRs.  */
static tree
mx_xfn_xform_decls (tree *t, int *continue_p, void *data)
{
  struct mf_xform_decls_data* d = (struct mf_xform_decls_data*) data;

  if (*t == NULL_TREE || *t == error_mark_node)
    {
      *continue_p = 0;
      return NULL_TREE;
    }

  *continue_p = 1;

  switch (TREE_CODE (*t))
    {
    case BIND_EXPR:
      {
        /* Process function parameters now (but only once).  */
        mx_register_decls (d->param_decls, &BIND_EXPR_BODY (*t));
        d->param_decls = NULL_TREE;

        mx_register_decls (BIND_EXPR_VARS (*t), &BIND_EXPR_BODY (*t));
      }
      break;

    default:
      break;
    }

  return NULL_TREE;
}
示例#2
0
static void
lower_bind_expr (tree_stmt_iterator *tsi, struct lower_data *data)
{
  tree old_block = data->block;
  tree stmt = tsi_stmt (*tsi);
  tree new_block = BIND_EXPR_BLOCK (stmt);

  if (new_block)
    {
      if (new_block == old_block)
	{
	  /* The outermost block of the original function may not be the
	     outermost statement chain of the gimplified function.  So we
	     may see the outermost block just inside the function.  */
	  gcc_assert (new_block == DECL_INITIAL (current_function_decl));
	  new_block = NULL;
	}
      else
	{
	  /* We do not expect to handle duplicate blocks.  */
	  gcc_assert (!TREE_ASM_WRITTEN (new_block));
	  TREE_ASM_WRITTEN (new_block) = 1;

	  /* Block tree may get clobbered by inlining.  Normally this would
	     be fixed in rest_of_decl_compilation using block notes, but
	     since we are not going to emit them, it is up to us.  */
	  BLOCK_CHAIN (new_block) = BLOCK_SUBBLOCKS (old_block);
	  BLOCK_SUBBLOCKS (old_block) = new_block;
	  BLOCK_SUBBLOCKS (new_block) = NULL_TREE;
	  BLOCK_SUPERCONTEXT (new_block) = old_block;

	  data->block = new_block;
	}
    }

  record_vars (BIND_EXPR_VARS (stmt));
  lower_stmt_body (BIND_EXPR_BODY (stmt), data);

  if (new_block)
    {
      gcc_assert (data->block == new_block);

      BLOCK_SUBBLOCKS (new_block)
	= blocks_nreverse (BLOCK_SUBBLOCKS (new_block));
      data->block = old_block;
    }

  /* The BIND_EXPR no longer carries any useful information -- kill it.  */
  tsi_link_before (tsi, BIND_EXPR_BODY (stmt), TSI_SAME_STMT);
  tsi_delink (tsi);
}
示例#3
0
static tree
ubsan_walk_array_refs_r (tree *tp, int *walk_subtrees, void *data)
{
  hash_set<tree> *pset = (hash_set<tree> *) data;

  if (TREE_CODE (*tp) == BIND_EXPR)
    {
      /* Since walk_tree doesn't call the callback function on the decls
	 in BIND_EXPR_VARS, we have to walk them manually, so we can avoid
	 instrumenting DECL_INITIAL of TREE_STATIC vars.  */
      *walk_subtrees = 0;
      for (tree decl = BIND_EXPR_VARS (*tp); decl; decl = DECL_CHAIN (decl))
	{
	  if (TREE_STATIC (decl))
	    continue;
	  walk_tree (&DECL_INITIAL (decl), ubsan_walk_array_refs_r, pset,
		     pset);
	  walk_tree (&DECL_SIZE (decl), ubsan_walk_array_refs_r, pset, pset);
	  walk_tree (&DECL_SIZE_UNIT (decl), ubsan_walk_array_refs_r, pset,
		     pset);
	}
      walk_tree (&BIND_EXPR_BODY (*tp), ubsan_walk_array_refs_r, pset, pset);
    }
  else if (TREE_CODE (*tp) == ADDR_EXPR
	   && TREE_CODE (TREE_OPERAND (*tp, 0)) == ARRAY_REF)
    {
      ubsan_maybe_instrument_array_ref (&TREE_OPERAND (*tp, 0), true);
      /* Make sure ubsan_maybe_instrument_array_ref is not called again
	 on the ARRAY_REF, the above call might not instrument anything
	 as the index might be constant or masked, so ensure it is not
	 walked again and walk its subtrees manually.  */
      tree aref = TREE_OPERAND (*tp, 0);
      pset->add (aref);
      *walk_subtrees = 0;
      walk_tree (&TREE_OPERAND (aref, 0), ubsan_walk_array_refs_r, pset, pset);
      walk_tree (&TREE_OPERAND (aref, 1), ubsan_walk_array_refs_r, pset, pset);
      walk_tree (&TREE_OPERAND (aref, 2), ubsan_walk_array_refs_r, pset, pset);
      walk_tree (&TREE_OPERAND (aref, 3), ubsan_walk_array_refs_r, pset, pset);
    }
  else if (TREE_CODE (*tp) == ARRAY_REF)
    ubsan_maybe_instrument_array_ref (tp, false);
  return NULL_TREE;
}
示例#4
0
static tree
build_trivial_generic_function ()
{
  auto_vec <tree> param_types;
  tree fndecl = make_fndecl (integer_type_node,
			     "test_fn",
			     param_types);
  ASSERT_TRUE (fndecl != NULL);

  /* Populate the function.  */
  tree retval = build_decl (UNKNOWN_LOCATION, RESULT_DECL,
			    NULL_TREE, integer_type_node);
  DECL_ARTIFICIAL (retval) = 1;
  DECL_IGNORED_P (retval) = 1;
  DECL_RESULT (fndecl) = retval;

  /* Create a BIND_EXPR, and within it, a statement list.  */
  tree stmt_list = alloc_stmt_list ();
  tree_stmt_iterator stmt_iter = tsi_start (stmt_list);
  tree block = make_node (BLOCK);
  tree bind_expr
    = build3 (BIND_EXPR, void_type_node, NULL, stmt_list, block);

  tree modify_retval = build2 (MODIFY_EXPR,
			       integer_type_node,
			       retval,
			       build_int_cst (integer_type_node, 42));
  tree return_stmt = build1 (RETURN_EXPR,
			     integer_type_node,
			     modify_retval);
  tsi_link_after (&stmt_iter, return_stmt, TSI_CONTINUE_LINKING);

  DECL_INITIAL (fndecl) = block;

  /* how to add to function? the following appears to be how to
     set the body of a fndecl: */
  DECL_SAVED_TREE(fndecl) = bind_expr;

  /* Ensure that locals appear in the debuginfo.  */
  BLOCK_VARS (block) = BIND_EXPR_VARS (bind_expr);

  return fndecl;
}
示例#5
0
tree visit_fun(tree *decl, int *subtrees, void *dummy)
{
    (void)subtrees;
    (void)dummy;
    enum tree_code code = TREE_CODE(*decl);
    tree var = NULL_TREE;
    
    if(code == BIND_EXPR)
    {
        for(var = BIND_EXPR_VARS(*decl); var; var = TREE_CHAIN(var))
        {
            if(TREE_CODE(var) == VAR_DECL)
            {
                if(auto_var_in_fn_p(var, current_function_decl) &&
                   !DECL_ARTIFICIAL(var))
                {
                    if(!DECL_INITIAL(var))
                    {
                        tree init_var = walk_tree_without_duplicates(decl, walk_init, var);

                        if(init_var == NULL_TREE)
                        {
                            // don't check classes initialization (too complicated)
                            if(!(TREE_CODE(TREE_TYPE(var)) == RECORD_TYPE &&
                                 CLASSTYPE_DECLARED_CLASS(TREE_TYPE(var))))
                            {
                                WARNING_DECL(*decl, "uninititialized auto var %qD", var);
                            }
                        }
                    }
                }
            }
        }
    }

    return NULL_TREE;
}
示例#6
0
static tree
pop_binding (void)
{
  tree res;
  struct binding_level *cur;

  cur = cur_binding_level;
  res = cur->bind;

  if (cur->save_stack)
    {
      tree tmp_var;
      tree save;
      tree save_call;
      tree restore;
      tree t;

      /* Create an artificial var to save the stack pointer.  */
      /* build_decl got a new parameter
       * http://www.mail-archive.com/[email protected]/msg01245.html
       */
      tmp_var = build_decl (UNKNOWN_LOCATION, VAR_DECL, NULL, ptr_type_node);
      DECL_ARTIFICIAL (tmp_var) = true;
      DECL_IGNORED_P (tmp_var) = true;
      TREE_USED (tmp_var) = true;
      push_decl (tmp_var);

      /*
       * The functions
       *   build_function_call_expr
       *
       * were eliminated in newer versions of GCC. See
       *   http://patchwork.ozlabs.org/patch/57555/
       *   http://patchwork.ozlabs.org/patch/57906/
       *   http://patchwork.ozlabs.org/patch/57911/
       *   http://patchwork.ozlabs.org/patch/57962/
       *
       *
       */

      /* Create the save stmt.  */
      /*
       * build_function_call_expr was removed with patch 57962
       *   http://patchwork.ozlabs.org/patch/57962/
       *
       * The signature was
       *   build_function_call_expr (location_t loc, tree fndecl, tree arglist)
       * A new function build_call_expr_loc_vec was introduced.
       * See examples in the patch how to replace that function.
       */
      save_call = build_call_expr_loc
    		  (UNKNOWN_LOCATION,
    		   implicit_built_in_decls[BUILT_IN_STACK_SAVE],
    		   0);
      save = build2 (MODIFY_EXPR, ptr_type_node, tmp_var, save_call);
      TREE_SIDE_EFFECTS (save) = true;

      /* Create the restore stmt.  */
      restore = build_call_expr_loc
    		  (UNKNOWN_LOCATION,
    		   implicit_built_in_decls[BUILT_IN_STACK_RESTORE],
    		   1,
    		   tmp_var);

      /* Build a try-finally block.
	 The statement list is the block of current statements.  */
      t = build2 (TRY_FINALLY_EXPR, void_type_node, cur_stmts, NULL_TREE);
      TREE_SIDE_EFFECTS (t) = true;

      /* The finally block is the restore stmt.  */
      append_to_statement_list (restore, &TREE_OPERAND (t, 1));

      /* The body of the BIND_BLOCK is the save stmt, followed by the
	 try block.  */
      BIND_EXPR_BODY (res) = NULL_TREE;
      append_to_statement_list (save, &BIND_EXPR_BODY (res));
      append_to_statement_list (t, &BIND_EXPR_BODY (res));
    }
  else
    {
      /* The body of the BIND_BLOCK is the statement block.  */
      BIND_EXPR_BODY (res) = cur_stmts;
    }
  BIND_EXPR_VARS (res) = cur->first_decl;

  BLOCK_SUBBLOCKS (cur->block) = cur->first_block;
  BLOCK_VARS (cur->block) = cur->first_decl;

  cur_binding_level = cur->prev;
  cur->prev = old_binding_levels;
  old_binding_levels = cur;

  return res;
}
示例#7
0
文件: ortho-lang.c 项目: Jonsba/ghdl
static tree
pop_binding (void)
{
  tree res;
  struct binding_level *cur;

  cur = cur_binding_level;
  res = cur->bind;

  if (cur->save_stack)
    {
      tree tmp_var;
      tree save;
      tree save_call;
      tree restore;
      tree t;

      /* Create an artificial var to save the stack pointer.  */
      tmp_var = build_decl (input_location, VAR_DECL, NULL, ptr_type_node);
      DECL_ARTIFICIAL (tmp_var) = true;
      DECL_IGNORED_P (tmp_var) = true;
      TREE_USED (tmp_var) = true;
      pushdecl (tmp_var);

      /* Create the save stmt.  */
      save_call = build_call_expr
	(builtin_decl_implicit (BUILT_IN_STACK_SAVE), 0);
      save = build2 (MODIFY_EXPR, ptr_type_node, tmp_var, save_call);
      TREE_SIDE_EFFECTS (save) = true;

      /* Create the restore stmt.  */
      restore = build_call_expr
	(builtin_decl_implicit (BUILT_IN_STACK_RESTORE), 1, tmp_var);

      /* Build a try-finally block.
	 The statement list is the block of current statements.  */
      t = build2 (TRY_FINALLY_EXPR, void_type_node, cur_stmts, NULL_TREE);
      TREE_SIDE_EFFECTS (t) = true;

      /* The finally block is the restore stmt.  */
      append_to_statement_list (restore, &TREE_OPERAND (t, 1));

      /* The body of the BIND_BLOCK is the save stmt, followed by the
	 try block.  */
      BIND_EXPR_BODY (res) = NULL_TREE;
      append_to_statement_list (save, &BIND_EXPR_BODY (res));
      append_to_statement_list (t, &BIND_EXPR_BODY (res));
    }
  else
    {
      /* The body of the BIND_BLOCK is the statement block.  */
      BIND_EXPR_BODY (res) = cur_stmts;
    }
  BIND_EXPR_VARS (res) = cur->first_decl;

  BLOCK_SUBBLOCKS (cur->block) = cur->first_block;
  BLOCK_VARS (cur->block) = cur->first_decl;

  /* Set current statements list and current binding.  */
  cur_stmts = cur->prev_stmts;
  cur_binding_level = cur->prev;

  /* Put removed binding to the recycle list.  */
  cur->prev = old_binding_levels;
  old_binding_levels = cur;

  return res;
}
示例#8
0
static tree
cp_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
{
  tree stmt = *stmt_p;
  struct cp_genericize_data *wtd = (struct cp_genericize_data *) data;
  struct pointer_set_t *p_set = wtd->p_set;

  /* If in an OpenMP context, note var uses.  */
  if (__builtin_expect (wtd->omp_ctx != NULL, 0)
      && (VAR_P (stmt)
	  || TREE_CODE (stmt) == PARM_DECL
	  || TREE_CODE (stmt) == RESULT_DECL)
      && omp_var_to_track (stmt))
    omp_cxx_notice_variable (wtd->omp_ctx, stmt);

  if (is_invisiref_parm (stmt)
      /* Don't dereference parms in a thunk, pass the references through. */
      && !(DECL_THUNK_P (current_function_decl)
	   && TREE_CODE (stmt) == PARM_DECL))
    {
      *stmt_p = convert_from_reference (stmt);
      *walk_subtrees = 0;
      return NULL;
    }

  /* Map block scope extern declarations to visible declarations with the
     same name and type in outer scopes if any.  */
  if (cp_function_chain->extern_decl_map
      && VAR_OR_FUNCTION_DECL_P (stmt)
      && DECL_EXTERNAL (stmt))
    {
      struct cxx_int_tree_map *h, in;
      in.uid = DECL_UID (stmt);
      h = (struct cxx_int_tree_map *)
	  htab_find_with_hash (cp_function_chain->extern_decl_map,
			       &in, in.uid);
      if (h)
	{
	  *stmt_p = h->to;
	  *walk_subtrees = 0;
	  return NULL;
	}
    }

  /* Other than invisiref parms, don't walk the same tree twice.  */
  if (pointer_set_contains (p_set, stmt))
    {
      *walk_subtrees = 0;
      return NULL_TREE;
    }

  if (TREE_CODE (stmt) == ADDR_EXPR
      && is_invisiref_parm (TREE_OPERAND (stmt, 0)))
    {
      /* If in an OpenMP context, note var uses.  */
      if (__builtin_expect (wtd->omp_ctx != NULL, 0)
	  && omp_var_to_track (TREE_OPERAND (stmt, 0)))
	omp_cxx_notice_variable (wtd->omp_ctx, TREE_OPERAND (stmt, 0));
      *stmt_p = convert (TREE_TYPE (stmt), TREE_OPERAND (stmt, 0));
      *walk_subtrees = 0;
    }
  else if (TREE_CODE (stmt) == RETURN_EXPR
	   && TREE_OPERAND (stmt, 0)
	   && is_invisiref_parm (TREE_OPERAND (stmt, 0)))
    /* Don't dereference an invisiref RESULT_DECL inside a RETURN_EXPR.  */
    *walk_subtrees = 0;
  else if (TREE_CODE (stmt) == OMP_CLAUSE)
    switch (OMP_CLAUSE_CODE (stmt))
      {
      case OMP_CLAUSE_LASTPRIVATE:
	/* Don't dereference an invisiref in OpenMP clauses.  */
	if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
	  {
	    *walk_subtrees = 0;
	    if (OMP_CLAUSE_LASTPRIVATE_STMT (stmt))
	      cp_walk_tree (&OMP_CLAUSE_LASTPRIVATE_STMT (stmt),
			    cp_genericize_r, data, NULL);
	  }
	break;
      case OMP_CLAUSE_PRIVATE:
	/* Don't dereference an invisiref in OpenMP clauses.  */
	if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
	  *walk_subtrees = 0;
	else if (wtd->omp_ctx != NULL)
	  {
	    /* Private clause doesn't cause any references to the
	       var in outer contexts, avoid calling
	       omp_cxx_notice_variable for it.  */
	    struct cp_genericize_omp_taskreg *old = wtd->omp_ctx;
	    wtd->omp_ctx = NULL;
	    cp_walk_tree (&OMP_CLAUSE_DECL (stmt), cp_genericize_r,
			  data, NULL);
	    wtd->omp_ctx = old;
	    *walk_subtrees = 0;
	  }
	break;
      case OMP_CLAUSE_SHARED:
      case OMP_CLAUSE_FIRSTPRIVATE:
      case OMP_CLAUSE_COPYIN:
      case OMP_CLAUSE_COPYPRIVATE:
	/* Don't dereference an invisiref in OpenMP clauses.  */
	if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
	  *walk_subtrees = 0;
	break;
      case OMP_CLAUSE_REDUCTION:
	/* Don't dereference an invisiref in reduction clause's
	   OMP_CLAUSE_DECL either.  OMP_CLAUSE_REDUCTION_{INIT,MERGE}
	   still needs to be genericized.  */
	if (is_invisiref_parm (OMP_CLAUSE_DECL (stmt)))
	  {
	    *walk_subtrees = 0;
	    if (OMP_CLAUSE_REDUCTION_INIT (stmt))
	      cp_walk_tree (&OMP_CLAUSE_REDUCTION_INIT (stmt),
			    cp_genericize_r, data, NULL);
	    if (OMP_CLAUSE_REDUCTION_MERGE (stmt))
	      cp_walk_tree (&OMP_CLAUSE_REDUCTION_MERGE (stmt),
			    cp_genericize_r, data, NULL);
	  }
	break;
      default:
	break;
      }
  else if (IS_TYPE_OR_DECL_P (stmt))
    *walk_subtrees = 0;

  /* Due to the way voidify_wrapper_expr is written, we don't get a chance
     to lower this construct before scanning it, so we need to lower these
     before doing anything else.  */
  else if (TREE_CODE (stmt) == CLEANUP_STMT)
    *stmt_p = build2_loc (EXPR_LOCATION (stmt),
			  CLEANUP_EH_ONLY (stmt) ? TRY_CATCH_EXPR
						 : TRY_FINALLY_EXPR,
			  void_type_node,
			  CLEANUP_BODY (stmt),
			  CLEANUP_EXPR (stmt));

  else if (TREE_CODE (stmt) == IF_STMT)
    {
      genericize_if_stmt (stmt_p);
      /* *stmt_p has changed, tail recurse to handle it again.  */
      return cp_genericize_r (stmt_p, walk_subtrees, data);
    }

  /* COND_EXPR might have incompatible types in branches if one or both
     arms are bitfields.  Fix it up now.  */
  else if (TREE_CODE (stmt) == COND_EXPR)
    {
      tree type_left
	= (TREE_OPERAND (stmt, 1)
	   ? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 1))
	   : NULL_TREE);
      tree type_right
	= (TREE_OPERAND (stmt, 2)
	   ? is_bitfield_expr_with_lowered_type (TREE_OPERAND (stmt, 2))
	   : NULL_TREE);
      if (type_left
	  && !useless_type_conversion_p (TREE_TYPE (stmt),
					 TREE_TYPE (TREE_OPERAND (stmt, 1))))
	{
	  TREE_OPERAND (stmt, 1)
	    = fold_convert (type_left, TREE_OPERAND (stmt, 1));
	  gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
						 type_left));
	}
      if (type_right
	  && !useless_type_conversion_p (TREE_TYPE (stmt),
					 TREE_TYPE (TREE_OPERAND (stmt, 2))))
	{
	  TREE_OPERAND (stmt, 2)
	    = fold_convert (type_right, TREE_OPERAND (stmt, 2));
	  gcc_assert (useless_type_conversion_p (TREE_TYPE (stmt),
						 type_right));
	}
    }

  else if (TREE_CODE (stmt) == BIND_EXPR)
    {
      if (__builtin_expect (wtd->omp_ctx != NULL, 0))
	{
	  tree decl;
	  for (decl = BIND_EXPR_VARS (stmt); decl; decl = DECL_CHAIN (decl))
	    if (VAR_P (decl)
		&& !DECL_EXTERNAL (decl)
		&& omp_var_to_track (decl))
	      {
		splay_tree_node n
		  = splay_tree_lookup (wtd->omp_ctx->variables,
				       (splay_tree_key) decl);
		if (n == NULL)
		  splay_tree_insert (wtd->omp_ctx->variables,
				     (splay_tree_key) decl,
				     TREE_STATIC (decl)
				     ? OMP_CLAUSE_DEFAULT_SHARED
				     : OMP_CLAUSE_DEFAULT_PRIVATE);
	      }
	}
      wtd->bind_expr_stack.safe_push (stmt);
      cp_walk_tree (&BIND_EXPR_BODY (stmt),
		    cp_genericize_r, data, NULL);
      wtd->bind_expr_stack.pop ();
    }

  else if (TREE_CODE (stmt) == USING_STMT)
    {
      tree block = NULL_TREE;

      /* Get the innermost inclosing GIMPLE_BIND that has a non NULL
         BLOCK, and append an IMPORTED_DECL to its
	 BLOCK_VARS chained list.  */
      if (wtd->bind_expr_stack.exists ())
	{
	  int i;
	  for (i = wtd->bind_expr_stack.length () - 1; i >= 0; i--)
	    if ((block = BIND_EXPR_BLOCK (wtd->bind_expr_stack[i])))
	      break;
	}
      if (block)
	{
	  tree using_directive;
	  gcc_assert (TREE_OPERAND (stmt, 0));

	  using_directive = make_node (IMPORTED_DECL);
	  TREE_TYPE (using_directive) = void_type_node;

	  IMPORTED_DECL_ASSOCIATED_DECL (using_directive)
	    = TREE_OPERAND (stmt, 0);
	  DECL_CHAIN (using_directive) = BLOCK_VARS (block);
	  BLOCK_VARS (block) = using_directive;
	}
      /* The USING_STMT won't appear in GENERIC.  */
      *stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
      *walk_subtrees = 0;
    }

  else if (TREE_CODE (stmt) == DECL_EXPR
	   && TREE_CODE (DECL_EXPR_DECL (stmt)) == USING_DECL)
    {
      /* Using decls inside DECL_EXPRs are just dropped on the floor.  */
      *stmt_p = build1 (NOP_EXPR, void_type_node, integer_zero_node);
      *walk_subtrees = 0;
    }
  else if (TREE_CODE (stmt) == OMP_PARALLEL || TREE_CODE (stmt) == OMP_TASK)
    {
      struct cp_genericize_omp_taskreg omp_ctx;
      tree c, decl;
      splay_tree_node n;

      *walk_subtrees = 0;
      cp_walk_tree (&OMP_CLAUSES (stmt), cp_genericize_r, data, NULL);
      omp_ctx.is_parallel = TREE_CODE (stmt) == OMP_PARALLEL;
      omp_ctx.default_shared = omp_ctx.is_parallel;
      omp_ctx.outer = wtd->omp_ctx;
      omp_ctx.variables = splay_tree_new (splay_tree_compare_decl_uid, 0, 0);
      wtd->omp_ctx = &omp_ctx;
      for (c = OMP_CLAUSES (stmt); c; c = OMP_CLAUSE_CHAIN (c))
	switch (OMP_CLAUSE_CODE (c))
	  {
	  case OMP_CLAUSE_SHARED:
	  case OMP_CLAUSE_PRIVATE:
	  case OMP_CLAUSE_FIRSTPRIVATE:
	  case OMP_CLAUSE_LASTPRIVATE:
	    decl = OMP_CLAUSE_DECL (c);
	    if (decl == error_mark_node || !omp_var_to_track (decl))
	      break;
	    n = splay_tree_lookup (omp_ctx.variables, (splay_tree_key) decl);
	    if (n != NULL)
	      break;
	    splay_tree_insert (omp_ctx.variables, (splay_tree_key) decl,
			       OMP_CLAUSE_CODE (c) == OMP_CLAUSE_SHARED
			       ? OMP_CLAUSE_DEFAULT_SHARED
			       : OMP_CLAUSE_DEFAULT_PRIVATE);
	    if (OMP_CLAUSE_CODE (c) != OMP_CLAUSE_PRIVATE
		&& omp_ctx.outer)
	      omp_cxx_notice_variable (omp_ctx.outer, decl);
	    break;
	  case OMP_CLAUSE_DEFAULT:
	    if (OMP_CLAUSE_DEFAULT_KIND (c) == OMP_CLAUSE_DEFAULT_SHARED)
	      omp_ctx.default_shared = true;
	  default:
	    break;
	  }
      cp_walk_tree (&OMP_BODY (stmt), cp_genericize_r, data, NULL);
      wtd->omp_ctx = omp_ctx.outer;
      splay_tree_delete (omp_ctx.variables);
    }
  else if (TREE_CODE (stmt) == CONVERT_EXPR)
    gcc_assert (!CONVERT_EXPR_VBASE_PATH (stmt));
  else if (TREE_CODE (stmt) == FOR_STMT)
    genericize_for_stmt (stmt_p, walk_subtrees, data);
  else if (TREE_CODE (stmt) == WHILE_STMT)
    genericize_while_stmt (stmt_p, walk_subtrees, data);
  else if (TREE_CODE (stmt) == DO_STMT)
    genericize_do_stmt (stmt_p, walk_subtrees, data);
  else if (TREE_CODE (stmt) == SWITCH_STMT)
    genericize_switch_stmt (stmt_p, walk_subtrees, data);
  else if (TREE_CODE (stmt) == CONTINUE_STMT)
    genericize_continue_stmt (stmt_p);
  else if (TREE_CODE (stmt) == BREAK_STMT)
    genericize_break_stmt (stmt_p);
  else if (TREE_CODE (stmt) == OMP_FOR
	   || TREE_CODE (stmt) == OMP_SIMD
	   || TREE_CODE (stmt) == OMP_DISTRIBUTE)
    genericize_omp_for_stmt (stmt_p, walk_subtrees, data);
  else if (TREE_CODE (stmt) == SIZEOF_EXPR)
    {
      if (SIZEOF_EXPR_TYPE_P (stmt))
	*stmt_p
	  = cxx_sizeof_or_alignof_type (TREE_TYPE (TREE_OPERAND (stmt, 0)),
					SIZEOF_EXPR, false);
      else if (TYPE_P (TREE_OPERAND (stmt, 0)))
	*stmt_p = cxx_sizeof_or_alignof_type (TREE_OPERAND (stmt, 0),
					      SIZEOF_EXPR, false);
      else
	*stmt_p = cxx_sizeof_or_alignof_expr (TREE_OPERAND (stmt, 0),
					      SIZEOF_EXPR, false);
      if (*stmt_p == error_mark_node)
	*stmt_p = size_one_node;
      return NULL;
    }    

  pointer_set_insert (p_set, *stmt_p);

  return NULL;
}