/* Process declarations and variables for C compiler.
Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+ 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of GCC.
/* The resulting tree type. */
union GTY((desc ("TREE_CODE (&%h.generic) == IDENTIFIER_NODE"),
- chain_next ("TREE_CODE (&%h.generic) == INTEGER_TYPE ? (union lang_tree_node *) TYPE_NEXT_VARIANT (&%h.generic) : ((union lang_tree_node *) TREE_CHAIN (&%h.generic))"))) lang_tree_node
+ chain_next ("TREE_CODE (&%h.generic) == INTEGER_TYPE ? (union lang_tree_node *) TYPE_NEXT_VARIANT (&%h.generic) : CODE_CONTAINS_STRUCT (TREE_CODE (&%h.generic), TS_COMMON) ? ((union lang_tree_node *) TREE_CHAIN (&%h.generic)) : NULL"))) lang_tree_node
{
union tree_node GTY ((tag ("0"),
desc ("tree_node_structure (&%h)")))
}
}
-/* Nonzero if we are currently in file scope. */
+/* Return true if we are in the global binding level. */
-int
+bool
global_bindings_p (void)
{
- return (current_scope == file_scope && !c_override_global_bindings_to_false
- ? -1
- : 0);
+ return current_scope == file_scope && !c_override_global_bindings_to_false;
}
void
b_ext = b_ext->shadowed;
if (b_ext)
{
- if (b_ext->u.type)
+ if (b_ext->u.type && comptypes (b_ext->u.type, type))
b_ext->u.type = composite_type (b_ext->u.type, type);
else
b_ext->u.type = type;
rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl), 0);
}
- /* At the end of a declaration, throw away any variable type sizes
- of types defined inside that declaration. There is no use
- computing them in the following function definition. */
- if (current_scope == file_scope)
- get_pending_sizes ();
-
/* Install a cleanup (aka destructor) if one was given. */
if (TREE_CODE (decl) == VAR_DECL && !TREE_STATIC (decl))
{
}
}
-/* Given a parsed parameter declaration, decode it into a PARM_DECL. */
+/* Given a parsed parameter declaration, decode it into a PARM_DECL.
+ EXPR is NULL or a pointer to an expression that needs to be
+ evaluated for the side effects of array size expressions in the
+ parameters. */
tree
-grokparm (const struct c_parm *parm)
+grokparm (const struct c_parm *parm, tree *expr)
{
tree attrs = parm->attrs;
tree decl = grokdeclarator (parm->declarator, parm->specs, PARM, false,
- NULL, &attrs, NULL, NULL, DEPRECATED_NORMAL);
+ NULL, &attrs, expr, NULL, DEPRECATED_NORMAL);
decl_attributes (&decl, attrs, 0);
}
/* Given a parsed parameter declaration, decode it into a PARM_DECL
- and push that on the current scope. */
+ and push that on the current scope. EXPR is a pointer to an
+ expression that needs to be evaluated for the side effects of array
+ size expressions in the parameters. */
void
-push_parm_decl (const struct c_parm *parm)
+push_parm_decl (const struct c_parm *parm, tree *expr)
{
tree attrs = parm->attrs;
tree decl;
decl = grokdeclarator (parm->declarator, parm->specs, PARM, false, NULL,
- &attrs, NULL, NULL, DEPRECATED_NORMAL);
+ &attrs, expr, NULL, DEPRECATED_NORMAL);
decl_attributes (&decl, attrs, 0);
decl = pushdecl (decl);
{
error ("width of %qs exceeds its type", name);
w = max_width;
- *width = build_int_cst (NULL_TREE, w);
+ *width = build_int_cst (integer_type_node, w);
}
else
w = tree_low_cst (*width, 1);
}
}
-/* Given a size SIZE that may not be a constant, return a SAVE_EXPR to
- serve as the actual size-expression for a type or decl. This is
- like variable_size in stor-layout.c, but we make global_bindings_p
- return negative to avoid calls to that function from outside the
- front end resulting in errors at file scope, then call this version
- instead from front-end code. */
-
-static tree
-c_variable_size (tree size)
-{
- tree save;
-
- if (TREE_CONSTANT (size))
- return size;
-
- size = save_expr (size);
-
- save = skip_simple_arithmetic (size);
-
- if (cfun && cfun->dont_save_pending_sizes_p)
- return size;
-
- if (!global_bindings_p ())
- put_pending_size (save);
-
- return size;
-}
-
/* Given declspecs and a declarator,
determine the name and type of the object declared
and construct a ..._DECL node for it.
MINUS_EXPR, which allows the -1 to get folded
with the +1 that happens when building TYPE_SIZE. */
if (size_varies)
- size = c_variable_size (size);
+ size = save_expr (size);
if (this_size_varies && TREE_CODE (size) == INTEGER_CST)
size = build2 (COMPOUND_EXPR, TREE_TYPE (size),
integer_zero_node, size);
convert (index_type,
size_one_node));
- /* If that overflowed, the array is too big. ???
- While a size of INT_MAX+1 technically shouldn't
- cause an overflow (because we subtract 1), the
- overflow is recorded during the conversion to
- index_type, before the subtraction. Handling
- this case seems like an unnecessary
- complication. */
- if (TREE_CODE (itype) == INTEGER_CST
- && TREE_OVERFLOW (itype))
+ /* The above overflows when size does not fit
+ in index_type.
+ ??? While a size of INT_MAX+1 technically shouldn't
+ cause an overflow (because we subtract 1), handling
+ this case seems like an unnecessary complication. */
+ if (TREE_CODE (size) == INTEGER_CST
+ && !int_fits_type_p (size, index_type))
{
if (name)
error_at (loc, "size of array %qE is too large",
inner layer of declarator. */
arg_info = declarator->u.arg_info;
arg_types = grokparms (arg_info, really_funcdef);
- if (really_funcdef)
- put_pending_sizes (arg_info->pending_sizes);
/* Type qualifiers before the return type of the function
qualify the return type, not the function type. */
This structure is later fed to 'grokparms' and 'store_parm_decls'.
ELLIPSIS being true means the argument list ended in '...' so don't
- append a sentinel (void_list_node) to the end of the type-list. */
+ append a sentinel (void_list_node) to the end of the type-list.
+
+ EXPR is NULL or an expression that needs to be evaluated for the
+ side effects of array size expressions in the parameters. */
struct c_arg_info *
-get_parm_info (bool ellipsis)
+get_parm_info (bool ellipsis, tree expr)
{
struct c_binding *b = current_scope->bindings;
struct c_arg_info *arg_info = build_arg_info ();
arg_info->tags = tags;
arg_info->types = types;
arg_info->others = others;
- arg_info->pending_sizes = get_pending_sizes ();
+ arg_info->pending_sizes = expr;
return arg_info;
}
\f
int timeout = 10;
/* If the struct is the list of instance variables of an Objective-C
- class, then we need to add all the instance variables of
- superclasses before checking for duplicates (since you can't have
+ class, then we need to check all the instance variables of
+ superclasses when checking for duplicates (since you can't have
an instance variable in a subclass with the same name as an
- instance variable in a superclass). objc_get_interface_ivars()
- leaves fieldlist unchanged if we are not in this case, so in that
- case nothing changes compared to C.
- */
+ instance variable in a superclass). We pass on this job to the
+ Objective-C compiler. objc_detect_field_duplicates() will return
+ false if we are not checking the list of instance variables and
+ the C frontend should proceed with the standard field duplicate
+ checks. If we are checking the list of instance variables, the
+ ObjC frontend will do the check, emit the errors if needed, and
+ then return true. */
if (c_dialect_objc ())
- fieldlist = objc_get_interface_ivars (fieldlist);
+ if (objc_detect_field_duplicates (false))
+ return;
/* First, see if there are more than "a few" fields.
This is trivially true if there are zero or one fields. */
because we throw away the array type in favor of a pointer type, and
thus won't naturally see the SAVE_EXPR containing the increment. All
other pending sizes would be handled by gimplify_parameters. */
- {
- VEC(tree,gc) *pending_sizes = get_pending_sizes ();
- tree t;
- int i;
-
- FOR_EACH_VEC_ELT (tree, pending_sizes, i, t)
- add_stmt (t);
- }
-
- /* Even though we're inside a function body, we still don't want to
- call expand_expr to calculate the size of a variable-sized array.
- We haven't necessarily assigned RTL to all variables yet, so it's
- not safe to try to expand expressions involving them. */
- cfun->dont_save_pending_sizes_p = 1;
+ if (arg_info->pending_sizes)
+ add_stmt (arg_info->pending_sizes);
}
\f
if (pch_file)
return;
+ timevar_start (TV_PHASE_DEFERRED);
+
/* Do the Objective-C stuff. This is where all the Objective-C
module stuff gets generated (symtab, class/protocol/selector
lists etc). */
c_write_global_declarations_1 (BLOCK_VARS (DECL_INITIAL (t)));
c_write_global_declarations_1 (BLOCK_VARS (ext_block));
+ timevar_stop (TV_PHASE_DEFERRED);
+ timevar_start (TV_PHASE_CGRAPH);
+
/* We're done parsing; proceed to optimize and emit assembly.
FIXME: shouldn't be the front end's responsibility to call this. */
cgraph_finalize_compilation_unit ();
+ timevar_stop (TV_PHASE_CGRAPH);
+ timevar_start (TV_PHASE_DBGINFO);
+
/* After cgraph has had a chance to emit everything that's going to
be emitted, output debug information for globals. */
if (!seen_error ())
}
ext_block = NULL;
+ timevar_stop (TV_PHASE_DBGINFO);
}
/* Register reserved keyword WORD as qualifier for address space AS. */
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