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Merge r1.3 (suppress warnings on K&R main).

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This commit is contained in:
kan 2003-11-07 03:21:29 +00:00
parent 9e0d7f6582
commit b62edf39c3
1 changed files with 87 additions and 10 deletions
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97
contrib/gcc/c-decl.c
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@ -287,6 +287,7 @@ static tree c_make_fname_decl PARAMS ((tree, int));
static void c_expand_body PARAMS ((tree, int, int));
static void warn_if_shadowing PARAMS ((tree, tree));
static bool flexible_array_type_p PARAMS ((tree));
static int field_decl_cmp PARAMS ((const PTR, const PTR));
static tree set_save_expr_context PARAMS ((tree *, int *, void *));
/* States indicating how grokdeclarator() should handle declspecs marked
@ -2013,8 +2014,10 @@ pushdecl (x)
while (TREE_CODE (element) == ARRAY_TYPE)
element = TREE_TYPE (element);
if (TREE_CODE (element) == RECORD_TYPE
|| TREE_CODE (element) == UNION_TYPE)
if ((TREE_CODE (element) == RECORD_TYPE
|| TREE_CODE (element) == UNION_TYPE)
&& (TREE_CODE (x) != TYPE_DECL
|| TREE_CODE (TREE_TYPE (x)) == ARRAY_TYPE))
b->incomplete_list = tree_cons (NULL_TREE, x, b->incomplete_list);
}
}
@ -5115,6 +5118,28 @@ grokfield (filename, line, declarator, declspecs, width)
objc_check_decl (value);
return value;
}
/* Function to help qsort sort FIELD_DECLs by name order. */
static int
field_decl_cmp (xp, yp)
const PTR xp;
const PTR yp;
{
tree *x = (tree *)xp, *y = (tree *)yp;
if (DECL_NAME (*x) == DECL_NAME (*y))
return 0;
if (DECL_NAME (*x) == NULL)
return -1;
if (DECL_NAME (*y) == NULL)
return 1;
if (DECL_NAME (*x) < DECL_NAME (*y))
return -1;
return 1;
}
/* Fill in the fields of a RECORD_TYPE or UNION_TYPE node, T.
FIELDLIST is a chain of FIELD_DECL nodes for the fields.
@ -5360,6 +5385,53 @@ finish_struct (t, fieldlist, attributes)
TYPE_FIELDS (t) = fieldlist;
/* If there are lots of fields, sort so we can look through them fast.
We arbitrarily consider 16 or more elts to be "a lot". */
{
int len = 0;
for (x = fieldlist; x; x = TREE_CHAIN (x))
{
if (len > 15 || DECL_NAME (x) == NULL)
break;
len += 1;
}
if (len > 15)
{
tree *field_array;
char *space;
len += list_length (x);
/* Use the same allocation policy here that make_node uses, to
ensure that this lives as long as the rest of the struct decl.
All decls in an inline function need to be saved. */
space = ggc_alloc (sizeof (struct lang_type) + len * sizeof (tree));
len = 0;
field_array = &(((struct lang_type *) space)->elts[0]);
for (x = fieldlist; x; x = TREE_CHAIN (x))
{
field_array[len++] = x;
/* if there is anonymous struct or unoin break out of the loop */
if (DECL_NAME (x) == NULL)
break;
}
/* found no anonymous struct/union add the TYPE_LANG_SPECIFIC. */
if (x == NULL)
{
TYPE_LANG_SPECIFIC (t) = (struct lang_type *) space;
TYPE_LANG_SPECIFIC (t)->len = len;
field_array = &TYPE_LANG_SPECIFIC (t)->elts[0];
qsort (field_array, len, sizeof (tree), field_decl_cmp);
}
}
}
for (x = TYPE_MAIN_VARIANT (t); x; x = TYPE_NEXT_VARIANT (x))
{
TYPE_FIELDS (x) = TYPE_FIELDS (t);
@ -5393,7 +5465,8 @@ finish_struct (t, fieldlist, attributes)
&& TREE_CODE (decl) != TYPE_DECL)
{
layout_decl (decl, 0);
/* This is a no-op in c-lang.c or something real in objc-act.c. */
/* This is a no-op in c-lang.c or something real in
objc-act.c. */
if (flag_objc)
objc_check_decl (decl);
rest_of_decl_compilation (decl, NULL, toplevel, 0);
@ -5429,7 +5502,11 @@ finish_struct (t, fieldlist, attributes)
else
current_binding_level->incomplete_list = TREE_CHAIN (x);
}
else
prev = x;
}
else
prev = x;
}
}
@ -6444,6 +6521,13 @@ finish_function (nested, can_defer_p)
&& DECL_INLINE (fndecl))
warning ("no return statement in function returning non-void");
/* With just -W, complain only if function returns both with
and without a value. */
if (extra_warnings
&& current_function_returns_value
&& current_function_returns_null)
warning ("this function may return with or without a value");
/* Clear out memory we no longer need. */
free_after_parsing (cfun);
/* Since we never call rest_of_compilation, we never clear
@ -6628,13 +6712,6 @@ c_expand_body (fndecl, nested_p, can_defer_p)
if (nested_p)
ggc_pop_context ();
/* With just -W, complain only if function returns both with
and without a value. */
if (extra_warnings
&& current_function_returns_value
&& current_function_returns_null)
warning ("this function may return with or without a value");
/* If requested, warn about function definitions where the function will
return a value (usually of some struct or union type) which itself will
take up a lot of stack space. */