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typeck.c (build_indirect_ref): Complain about a pointer to data member, too. 

* typeck.c (build_indirect_ref): Complain about a pointer to data
	member, too.
	* typeck2.c (build_m_component_ref): Don't indirect a pointer to
	data member.
	* init.c (resolve_offset_ref): Don't undo the above.
	* cp-tree.h (DECL_C_BIT_FIELD, SET_DECL_C_BIT_FIELD): New macros.
	(struct lang_decl_flags): Add `bitfield'.
	* class.c (finish_struct_1): Use DECL_C_BIT_FIELD instead of
	DECL_BIT_FIELD.
	* decl2.c (grokbitfield, grok_alignof): Likewise.
	* init.c (build_offset_ref): Likewise.
	* typeck.c (build_component_addr, expr_sizeof): Likewise.
	* cvt.c (build_up_reference): Don't crash if taking the address
	returns error_mark_node.

From-SVN: r23124
This commit is contained in:
Jason Merrill 1998-10-16 03:37:43 +00:00 committed by Jason Merrill
parent 94706a5cfc
commit 162bc98d09
8 changed files with 46 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
gcc/cp/ChangeLog
View File

@ -1,5 +1,21 @@
1998-10-16 Jason Merrill <jason@yorick.cygnus.com>
* typeck.c (build_indirect_ref): Complain about a pointer to data
member, too.
* typeck2.c (build_m_component_ref): Don't indirect a pointer to
data member.
* init.c (resolve_offset_ref): Don't undo the above.
* cp-tree.h (DECL_C_BIT_FIELD, SET_DECL_C_BIT_FIELD): New macros.
(struct lang_decl_flags): Add `bitfield'.
* class.c (finish_struct_1): Use DECL_C_BIT_FIELD instead of
DECL_BIT_FIELD.
* decl2.c (grokbitfield, grok_alignof): Likewise.
* init.c (build_offset_ref): Likewise.
* typeck.c (build_component_addr, expr_sizeof): Likewise.
* cvt.c (build_up_reference): Don't crash if taking the address
returns error_mark_node.
* decl.c (grokfndecl): Also check ctype when checking for ::main().
1998-10-15 Jason Merrill <jason@yorick.cygnus.com>

12
gcc/cp/class.c
View File

@ -3541,12 +3541,10 @@ finish_struct_1 (t, warn_anon)
}
}
/* We set DECL_BIT_FIELD tentatively in grokbitfield.
If the type and width are valid, we'll keep it set.
Otherwise, the flag is cleared. */
if (DECL_BIT_FIELD (x))
/* We set DECL_C_BIT_FIELD in grokbitfield.
If the type and width are valid, we'll also set DECL_BIT_FIELD. */
if (DECL_C_BIT_FIELD (x))
{
DECL_BIT_FIELD (x) = 0;
/* Invalid bit-field size done by grokfield. */
/* Detect invalid bit-field type. */
if (DECL_INITIAL (x)
@ -3844,13 +3842,13 @@ finish_struct_1 (t, warn_anon)
C++: maybe we will support default field initialization some day... */
/* Delete all zero-width bit-fields from the front of the fieldlist */
while (fields && DECL_BIT_FIELD (fields)
while (fields && DECL_C_BIT_FIELD (fields)
&& DECL_INITIAL (fields))
fields = TREE_CHAIN (fields);
/* Delete all such fields from the rest of the fields. */
for (x = fields; x;)
{
if (TREE_CHAIN (x) && DECL_BIT_FIELD (TREE_CHAIN (x))
if (TREE_CHAIN (x) && DECL_C_BIT_FIELD (TREE_CHAIN (x))
&& DECL_INITIAL (TREE_CHAIN (x)))
TREE_CHAIN (x) = TREE_CHAIN (TREE_CHAIN (x));
else

9
gcc/cp/cp-tree.h
View File

@ -1065,7 +1065,8 @@ struct lang_decl_flags
unsigned not_really_extern : 1;
unsigned comdat : 1;
unsigned needs_final_overrider : 1;
unsigned dummy : 3;
unsigned bitfield : 1;
unsigned dummy : 2;
tree access;
tree context;
@ -1398,6 +1399,12 @@ extern int flag_new_for_scope;
/* Record whether a typedef for type `int' was actually `signed int'. */
#define C_TYPEDEF_EXPLICITLY_SIGNED(exp) DECL_LANG_FLAG_1 ((exp))
/* In a FIELD_DECL, nonzero if the decl was originally a bitfield. */
#define DECL_C_BIT_FIELD(NODE) \
(DECL_LANG_SPECIFIC (NODE) && DECL_LANG_SPECIFIC (NODE)->decl_flags.bitfield)
#define SET_DECL_C_BIT_FIELD(NODE) \
(DECL_LANG_SPECIFIC (NODE)->decl_flags.bitfield = 1)
/* Nonzero if the type T promotes to itself.
ANSI C states explicitly the list of types that promote;
in particular, short promotes to int even if they have the same width. */

3
gcc/cp/cvt.c
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@ -377,6 +377,9 @@ build_up_reference (type, arg, flags)
address, transform all occurrences of the register, into a memory
reference we could win better. */
rval = build_unary_op (ADDR_EXPR, arg, 1);
if (rval == error_mark_node)
return error_mark_node;
if ((flags & LOOKUP_PROTECT)
&& TYPE_MAIN_VARIANT (argtype) != TYPE_MAIN_VARIANT (target_type)
&& IS_AGGR_TYPE (argtype)

4
gcc/cp/decl2.c
View File

@ -1046,7 +1046,7 @@ grok_alignof (expr)
return build_min (ALIGNOF_EXPR, sizetype, expr);
if (TREE_CODE (expr) == COMPONENT_REF
&& DECL_BIT_FIELD (TREE_OPERAND (expr, 1)))
&& DECL_C_BIT_FIELD (TREE_OPERAND (expr, 1)))
error ("`__alignof__' applied to a bit-field");
if (TREE_CODE (expr) == INDIRECT_REF)
@ -1809,7 +1809,7 @@ grokbitfield (declarator, declspecs, width)
{
constant_expression_warning (width);
DECL_INITIAL (value) = width;
DECL_BIT_FIELD (value) = 1;
SET_DECL_C_BIT_FIELD (value);
}
DECL_IN_AGGR_P (value) = 1;

12
gcc/cp/init.c
View File

@ -1686,7 +1686,7 @@ build_offset_ref (type, name)
return convert_from_reference (t);
}
if (TREE_CODE (t) == FIELD_DECL && DECL_BIT_FIELD (t))
if (TREE_CODE (t) == FIELD_DECL && DECL_C_BIT_FIELD (t))
{
cp_error ("illegal pointer to bit field `%D'", t);
return error_mark_node;
@ -1740,7 +1740,8 @@ resolve_offset_ref (exp)
}
if ((TREE_CODE (member) == VAR_DECL
&& ! TYPE_PTRMEMFUNC_P (TREE_TYPE (member)))
&& ! TYPE_PTRMEMFUNC_P (TREE_TYPE (member))
&& ! TYPE_PTRMEM_P (TREE_TYPE (member)))
|| TREE_CODE (TREE_TYPE (member)) == FUNCTION_TYPE
|| TREE_CODE (TREE_TYPE (member)) == METHOD_TYPE)
{
@ -1824,7 +1825,7 @@ resolve_offset_ref (exp)
for the dereferenced pointer-to-member construct. */
addr = build_unary_op (ADDR_EXPR, base, 0);
if (TREE_CODE (TREE_TYPE (member)) == OFFSET_TYPE)
if (TYPE_PTRMEM_P (TREE_TYPE (member)))
{
if (addr == error_mark_node)
{
@ -1832,10 +1833,9 @@ resolve_offset_ref (exp)
return error_mark_node;
}
basetype = TYPE_OFFSET_BASETYPE (TREE_TYPE (member));
basetype = TYPE_OFFSET_BASETYPE (TREE_TYPE (TREE_TYPE (member)));
addr = convert_pointer_to (basetype, addr);
member = cp_convert (ptrdiff_type_node,
build_unary_op (ADDR_EXPR, member, 0));
member = cp_convert (ptrdiff_type_node, member);
/* Pointer to data members are offset by one, so that a null
pointer with a real value of 0 is distinguishable from an

10
gcc/cp/typeck.c
View File

@ -1538,7 +1538,7 @@ expr_sizeof (e)
return build_min (SIZEOF_EXPR, sizetype, e);
if (TREE_CODE (e) == COMPONENT_REF
&& DECL_BIT_FIELD (TREE_OPERAND (e, 1)))
&& DECL_C_BIT_FIELD (TREE_OPERAND (e, 1)))
error ("sizeof applied to a bit-field");
/* ANSI says arrays and functions are converted inside comma.
But we can't really convert them in build_compound_expr
@ -2291,7 +2291,7 @@ build_indirect_ref (ptr, errorstring)
if (ptr == current_class_ptr)
return current_class_ref;
if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
if (TYPE_PTR_P (type) || TREE_CODE (type) == REFERENCE_TYPE)
{
/* [expr.unary.op]
@ -2326,8 +2326,8 @@ build_indirect_ref (ptr, errorstring)
}
/* `pointer' won't be an error_mark_node if we were given a
pointer to member, so it's cool to check for this here. */
else if (TYPE_PTRMEMFUNC_P (type))
error ("invalid use of `%s' on pointer to member function", errorstring);
else if (TYPE_PTRMEM_P (type) || TYPE_PTRMEMFUNC_P (type))
error ("invalid use of `%s' on pointer to member", errorstring);
else if (TREE_CODE (type) == RECORD_TYPE
&& (IS_SIGNATURE_POINTER (type) || IS_SIGNATURE_REFERENCE (type)))
error ("cannot dereference signature pointer/reference");
@ -4248,7 +4248,7 @@ build_component_addr (arg, argtype, msg)
tree basetype = decl_type_context (field);
tree rval = build_unary_op (ADDR_EXPR, TREE_OPERAND (arg, 0), 0);
if (DECL_BIT_FIELD (field))
if (DECL_C_BIT_FIELD (field))
{
error (msg, IDENTIFIER_POINTER (DECL_NAME (field)));
return error_mark_node;

3
gcc/cp/typeck2.c
View File

@ -1393,8 +1393,7 @@ build_m_component_ref (datum, component)
}
else
{
component = build_indirect_ref (component, NULL_PTR);
type = TREE_TYPE (component);
type = TREE_TYPE (TREE_TYPE (component));
rettype = TREE_TYPE (type);
}