The BV_DELTA of each node gives the amount by which to adjust the
`this' pointer when calling the function. If the method is an
- overriden version of a base class method, then it is assumed
+ overridden version of a base class method, then it is assumed
that, prior to adjustment, the this pointer points to an object
of the base class.
function, it is eventually set to an INTEGER_CST indicating the
index in the vtable at which this function can be found. When
a virtual function is declared, but before it is known what
- function is overriden, this field is the error_mark_node.
+ function is overridden, this field is the error_mark_node.
Temporarily, it may be set to a TREE_LIST whose TREE_VALUE is
the virtual function this one overrides, and whose TREE_CHAIN is
struct z_candidate *z_c;
};
-#define SRCLOC_FILE(NODE) (((struct tree_srcloc*)SRCLOC_CHECK (NODE))->filename)
-#define SRCLOC_LINE(NODE) (((struct tree_srcloc*)SRCLOC_CHECK (NODE))->linenum)
+#define SOURCE_LOCUS(NODE) \
+ (((struct tree_srcloc*)SRCLOC_CHECK (NODE))->locus)
+#define SRCLOC_FILE(NODE) SOURCE_LOCUS (NODE).file
+#define SRCLOC_LINE(NODE) SOURCE_LOCUS (NODE).line
+
struct tree_srcloc GTY(())
{
struct tree_common common;
- const char *filename;
- int linenum;
+ location_t locus;
};
/* Macros for access to language-specific slots in an identifier. */
(IS_AGGR_TYPE_CODE (TREE_CODE (T)) && IS_AGGR_TYPE (T))
#define IS_AGGR_TYPE_CODE(T) ((T) == RECORD_TYPE || (T) == UNION_TYPE)
-#define IS_AGGR_TYPE_2(TYPE1, TYPE2) \
- (TREE_CODE (TYPE1) == TREE_CODE (TYPE2) \
- && IS_AGGR_TYPE (TYPE1) && IS_AGGR_TYPE (TYPE2))
#define TAGGED_TYPE_P(T) \
(CLASS_TYPE_P (T) || TREE_CODE (T) == ENUMERAL_TYPE)
#define IS_OVERLOAD_TYPE(T) TAGGED_TYPE_P (T)
unsigned u1sel : 1;
unsigned u2sel : 1;
unsigned can_be_full : 1;
- unsigned unused : 1; /* One unused bit. */
+ unsigned this_thunk_p : 1;
union lang_decl_u {
/* In a FUNCTION_DECL, VAR_DECL, TYPE_DECL, or TEMPLATE_DECL, this
int discriminator;
/* In a FUNCTION_DECL for which DECL_THUNK_P holds, this is
- THUNK_VCALL_OFFSET. */
- tree GTY((tag ("2"))) vcall_offset;
+ THUNK_VIRTUAL_OFFSET. */
+ tree GTY((tag ("2"))) virtual_offset;
} GTY ((desc ("%1.u2sel"))) u2;
};
/* For a non-virtual FUNCTION_DECL, this is
DECL_FRIEND_CONTEXT. For a virtual FUNCTION_DECL for which
- DECL_THUNK_P does not hold, this is DECL_THUNKS. */
+ DECL_THIS_THUNK_P does not hold, this is DECL_THUNKS. Both
+ this pointer and result pointer adjusting thunks are
+ chained here. This pointer thunks to return pointer thunks
+ will be chained on the return pointer thunk. */
tree context;
/* In a FUNCTION_DECL, this is DECL_CLONED_FUNCTION. */
tree cloned_function;
/* In a FUNCTION_DECL for which THUNK_P holds, this is
- THUNK_DELTA. */
- HOST_WIDE_INT delta;
+ THUNK_FIXED_OFFSET. */
+ HOST_WIDE_INT fixed_offset;
/* In an overloaded operator, this is the value of
DECL_OVERLOADED_OPERATOR_P. */
#define DECL_NEEDS_FINAL_OVERRIDER_P(NODE) \
(DECL_LANG_SPECIFIC (NODE)->decl_flags.needs_final_overrider)
-/* The thunks associated with NODE, a FUNCTION_DECL that is not itself
- a thunk. */
+/* The thunks associated with NODE, a FUNCTION_DECL. */
#define DECL_THUNKS(NODE) \
(DECL_LANG_SPECIFIC (NODE)->u.f.context)
(TREE_CODE (NODE) == FUNCTION_DECL \
&& DECL_LANG_FLAG_7 (NODE))
+/* Nonzero if NODE is a this pointer adjusting thunk. */
+#define DECL_THIS_THUNK_P(NODE) \
+ (DECL_THUNK_P (NODE) && DECL_LANG_SPECIFIC (NODE)->decl_flags.this_thunk_p)
+
+/* Nonzero if NODE is a result pointer adjusting thunk. */
+#define DECL_RESULT_THUNK_P(NODE) \
+ (DECL_THUNK_P (NODE) && !DECL_LANG_SPECIFIC (NODE)->decl_flags.this_thunk_p)
+
/* Nonzero if NODE is a FUNCTION_DECL, but not a thunk. */
#define DECL_NON_THUNK_FUNCTION_P(NODE) \
(TREE_CODE (NODE) == FUNCTION_DECL && !DECL_THUNK_P (NODE))
(DECL_NON_THUNK_FUNCTION_P (NODE) && DECL_EXTERN_C_P (NODE))
/* Set DECL_THUNK_P for node. */
-#define SET_DECL_THUNK_P(NODE) \
+#define SET_DECL_THUNK_P(NODE, THIS_ADJUSTING) \
(DECL_LANG_FLAG_7 (NODE) = 1, \
- DECL_LANG_SPECIFIC (NODE)->u.f.u3sel = 1)
+ DECL_LANG_SPECIFIC (NODE)->u.f.u3sel = 1, \
+ DECL_LANG_SPECIFIC (NODE)->decl_flags.this_thunk_p = (THIS_ADJUSTING))
/* Nonzero if this DECL is the __PRETTY_FUNCTION__ variable in a
template function. */
A thunk is an alternate entry point for an ordinary FUNCTION_DECL.
The address of the ordinary FUNCTION_DECL is given by the
DECL_INITIAL, which is always an ADDR_EXPR whose operand is a
- FUNCTION_DECL. The job of the thunk is to adjust the `this'
- pointer before transferring control to the FUNCTION_DECL.
-
+ FUNCTION_DECL. The job of the thunk is to either adjust the this
+ pointer before transferring control to the FUNCTION_DECL, or call
+ FUNCTION_DECL and then adjust the result value. Note, the result
+ pointer adjusting thunk must perform a call to the thunked
+ function, (or be implemented via passing some invisible parameter
+ to the thunked function, which is modified to perform the
+ adjustment just before returning).
+
A thunk may perform either, or both, of the following operations:
- o Adjust the `this' pointer by a constant offset.
- o Adjust the `this' pointer by looking up a vcall-offset
+ o Adjust the this or result pointer by a constant offset.
+ o Adjust the this or result pointer by looking up a vcall or vbase offset
in the vtable.
- If both operations are performed, then the constant adjument to
- `this' is performed first.
+ A this pointer adjusting thunk converts from a base to a derived
+ class, and hence adds the offsets. A result pointer adjusting thunk
+ converts from a derived class to a base, and hence subtracts the
+ offsets. If both operations are performed, then the constant
+ adjument is performed first for this pointer adjustment and last
+ for the result pointer adjustment.
- The constant adjustment is given by THUNK_DELTA. If the
- vcall-offset is required, the index into the vtable is given by
- THUNK_VCALL_OFFSET. */
+ The constant adjustment is given by THUNK_FIXED_OFFSET. If the
+ vcall or vbase offset is required, the index into the vtable is given by
+ THUNK_VIRTUAL_OFFSET. */
/* An integer indicating how many bytes should be subtracted from the
- `this' pointer when this function is called. */
-#define THUNK_DELTA(DECL) \
- (DECL_LANG_SPECIFIC (DECL)->u.f.delta)
+ this or result pointer when this function is called. */
+#define THUNK_FIXED_OFFSET(DECL) \
+ (DECL_LANG_SPECIFIC (DECL)->u.f.fixed_offset)
-/* A tree indicating how many bytes should be subtracted from the
- vtable for the `this' pointer to find the vcall offset. (The vptr
- is always located at offset zero from the f `this' pointer.) If
- NULL, then there is no vcall offset. */
-#define THUNK_VCALL_OFFSET(DECL) \
- (LANG_DECL_U2_CHECK (DECL, 0)->vcall_offset)
+/* A tree indicating how many bytes should be added to the
+ vtable for the this or result pointer to find the vcall or vbase
+ offset. (The vptr is always located at offset zero from the
+ this or result pointer.) If NULL, then there is no virtual adjust. */
+#define THUNK_VIRTUAL_OFFSET(DECL) \
+ (LANG_DECL_U2_CHECK (DECL, 0)->virtual_offset)
/* These macros provide convenient access to the various _STMT nodes
created when parsing template declarations. */
extern operator_name_info_t assignment_operator_name_info[];
/* in call.c */
-extern int check_dtor_name PARAMS ((tree, tree));
+extern bool check_dtor_name (tree, tree);
extern int get_arglist_len_in_bytes PARAMS ((tree));
extern tree build_vfield_ref PARAMS ((tree, tree));
-extern tree build_scoped_method_call PARAMS ((tree, tree, tree, tree));
+extern tree build_scoped_method_call (tree, tree, tree, tree);
extern tree build_conditional_expr PARAMS ((tree, tree, tree));
-extern tree build_addr_func PARAMS ((tree));
-extern tree build_call PARAMS ((tree, tree));
-extern tree build_method_call PARAMS ((tree, tree, tree, tree, int));
-extern int null_ptr_cst_p PARAMS ((tree));
-extern int sufficient_parms_p PARAMS ((tree));
-extern tree type_decays_to PARAMS ((tree));
-extern tree build_user_type_conversion PARAMS ((tree, tree, int));
-extern tree build_new_function_call PARAMS ((tree, tree));
-extern tree build_new_method_call (tree, tree, tree, tree, int);
-extern tree build_special_member_call (tree, tree, tree, tree, int);
-extern tree build_new_op PARAMS ((enum tree_code, int, tree, tree, tree));
-extern tree build_op_delete_call PARAMS ((enum tree_code, tree, tree, int, tree));
-extern int can_convert PARAMS ((tree, tree));
-extern int can_convert_arg PARAMS ((tree, tree, tree));
-extern int can_convert_arg_bad PARAMS ((tree, tree, tree));
-extern int enforce_access PARAMS ((tree, tree));
-extern tree convert_default_arg PARAMS ((tree, tree, tree, int));
-extern tree convert_arg_to_ellipsis PARAMS ((tree));
-extern tree build_x_va_arg PARAMS ((tree, tree));
-extern tree cxx_type_promotes_to PARAMS ((tree));
-extern tree type_passed_as PARAMS ((tree));
-extern tree convert_for_arg_passing PARAMS ((tree, tree));
+extern tree build_addr_func (tree);
+extern tree build_call (tree, tree);
+extern tree build_method_call (tree, tree, tree, tree, int);
+extern bool null_ptr_cst_p (tree);
+extern bool sufficient_parms_p (tree);
+extern tree type_decays_to (tree);
+extern tree build_user_type_conversion (tree, tree, int);
+extern tree build_new_function_call (tree, tree);
+extern tree build_new_method_call (tree, tree, tree, tree, int);
+extern tree build_special_member_call (tree, tree, tree, tree, int);
+extern tree build_new_op (enum tree_code, int, tree, tree, tree);
+extern tree build_op_delete_call (enum tree_code, tree, tree, int, tree);
+extern bool can_convert (tree, tree);
+extern bool can_convert_arg (tree, tree, tree);
+extern bool can_convert_arg_bad (tree, tree, tree);
+extern bool enforce_access (tree, tree);
+extern tree convert_default_arg (tree, tree, tree, int);
+extern tree convert_arg_to_ellipsis (tree);
+extern tree build_x_va_arg (tree, tree);
+extern tree cxx_type_promotes_to (tree);
+extern tree type_passed_as (tree);
+extern tree convert_for_arg_passing (tree, tree);
extern tree cp_convert_parm_for_inlining PARAMS ((tree, tree, tree));
-extern int is_properly_derived_from PARAMS ((tree, tree));
-extern tree initialize_reference PARAMS ((tree, tree));
-extern tree strip_top_quals PARAMS ((tree));
-extern tree perform_implicit_conversion PARAMS ((tree, tree));
+extern bool is_properly_derived_from (tree, tree);
+extern tree initialize_reference (tree, tree);
+extern tree strip_top_quals (tree);
+extern tree perform_implicit_conversion (tree, tree);
+extern tree in_charge_arg_for_name (tree);
/* in class.c */
extern tree build_base_path PARAMS ((enum tree_code, tree, tree, int));
extern void maybe_note_name_used_in_class PARAMS ((tree, tree));
extern void note_name_declared_in_class PARAMS ((tree, tree));
extern tree get_vtbl_decl_for_binfo PARAMS ((tree));
-extern tree in_charge_arg_for_name PARAMS ((tree));
extern tree get_vtt_name PARAMS ((tree));
extern tree get_primary_binfo PARAMS ((tree));
extern tree lookup_namespace_name PARAMS ((tree, tree));
extern tree build_typename_type PARAMS ((tree, tree, tree, tree));
extern tree make_typename_type PARAMS ((tree, tree, tsubst_flags_t));
-extern tree make_unbound_class_template PARAMS ((tree, tree, int));
+extern tree make_unbound_class_template PARAMS ((tree, tree, tsubst_flags_t));
extern tree lookup_name_nonclass PARAMS ((tree));
extern tree lookup_function_nonclass PARAMS ((tree, tree));
extern tree lookup_name PARAMS ((tree, int));
extern tree grokfield PARAMS ((tree, tree, tree, tree, tree));
extern tree grokbitfield PARAMS ((tree, tree, tree));
extern tree groktypefield PARAMS ((tree, tree));
-extern tree grokoptypename PARAMS ((tree, tree));
+extern tree grokoptypename PARAMS ((tree, tree, tree));
extern void cplus_decl_attributes PARAMS ((tree *, tree, int));
extern tree constructor_name_full PARAMS ((tree));
extern tree constructor_name PARAMS ((tree));
extern void defer_fn PARAMS ((tree));
extern void finish_anon_union PARAMS ((tree));
extern tree finish_table PARAMS ((tree, tree, tree, int));
-extern void finish_builtin_type PARAMS ((tree, const char *,
- tree *, int, tree));
extern tree coerce_new_type PARAMS ((tree));
extern tree coerce_delete_type PARAMS ((tree));
extern void comdat_linkage PARAMS ((tree));
extern void cxx_init_options PARAMS ((void));
/* in method.c */
-extern void init_method PARAMS ((void));
-extern void set_mangled_name_for_decl PARAMS ((tree));
-extern tree build_opfncall PARAMS ((enum tree_code, int, tree, tree, tree));
-extern tree hack_identifier PARAMS ((tree, tree));
-extern tree make_thunk PARAMS ((tree, tree, tree));
-extern void use_thunk PARAMS ((tree, int));
-extern void synthesize_method PARAMS ((tree));
-extern tree implicitly_declare_fn PARAMS ((special_function_kind, tree, int));
-extern tree skip_artificial_parms_for PARAMS ((tree, tree));
+extern void init_method (void);
+extern void set_mangled_name_for_decl (tree);
+extern tree build_opfncall (enum tree_code, int, tree, tree, tree);
+extern tree hack_identifier (tree, tree);
+extern tree make_thunk (tree, bool, tree, tree);
+extern void finish_thunk (tree, tree, tree);
+extern void use_thunk (tree, bool);
+extern void synthesize_method (tree);
+extern tree implicitly_declare_fn (special_function_kind, tree, bool);
+extern tree skip_artificial_parms_for (tree, tree);
/* In optimize.c */
-extern void optimize_function PARAMS ((tree));
-extern int calls_setjmp_p PARAMS ((tree));
-extern int maybe_clone_body PARAMS ((tree));
+extern void optimize_function (tree);
+extern bool calls_setjmp_p (tree);
+extern bool maybe_clone_body (tree);
/* in pt.c */
extern void check_template_shadow PARAMS ((tree));
extern int cp_is_overload_p PARAMS ((tree));
extern int cp_auto_var_in_fn_p PARAMS ((tree,tree));
extern tree cp_copy_res_decl_for_inlining PARAMS ((tree, tree, tree, void*,
- int*, void*));
+ int*, tree));
extern int cp_start_inlining PARAMS ((tree));
extern void cp_end_inlining PARAMS ((tree));
extern tree mangle_vtbl_for_type PARAMS ((tree));
extern tree mangle_vtt_for_type PARAMS ((tree));
extern tree mangle_ctor_vtbl_for_type PARAMS ((tree, tree));
-extern tree mangle_thunk PARAMS ((tree, tree, tree));
+extern tree mangle_thunk PARAMS ((tree, int, tree, tree));
extern tree mangle_conv_op_name_for_type PARAMS ((tree));
extern tree mangle_guard_variable PARAMS ((tree));
extern tree mangle_ref_init_variable PARAMS ((tree));
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