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/*
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Crown Copyright (c) 1997
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This TenDRA(r) Computer Program is subject to Copyright
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owned by the United Kingdom Secretary of State for Defence
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acting through the Defence Evaluation and Research Agency
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(DERA). It is made available to Recipients with a
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royalty-free licence for its use, reproduction, transfer
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to other parties and amendment for any purpose not excluding
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product development provided that any such use et cetera
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shall be deemed to be acceptance of the following conditions:-
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(1) Its Recipients shall ensure that this Notice is
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reproduced upon any copies or amended versions of it;
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(2) Any amended version of it shall be clearly marked to
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show both the nature of and the organisation responsible
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for the relevant amendment or amendments;
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(3) Its onward transfer from a recipient to another
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party shall be deemed to be that party's acceptance of
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these conditions;
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(4) DERA gives no warranty or assurance as to its
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quality or suitability for any purpose and DERA accepts
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no liability whatsoever in relation to any use to which
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it may be put.
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*/
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#include "config.h"
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#include "c_types.h"
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#include "ctype_ops.h"
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#include "exp_ops.h"
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#include "hashid_ops.h"
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#include "id_ops.h"
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#include "inst_ops.h"
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#include "member_ops.h"
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#include "nspace_ops.h"
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#include "off_ops.h"
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#include "tok_ops.h"
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#include "type_ops.h"
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#include "error.h"
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#include "catalog.h"
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#include "basetype.h"
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#include "check.h"
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#include "chktype.h"
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#include "class.h"
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#include "compile.h"
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#include "constant.h"
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#include "construct.h"
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#include "convert.h"
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#include "declare.h"
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#include "dump.h"
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#include "file.h"
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#include "function.h"
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#include "hash.h"
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#include "identifier.h"
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#include "initialise.h"
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#include "instance.h"
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#include "literal.h"
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#include "namespace.h"
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#include "option.h"
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#include "preproc.h"
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#include "save.h"
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#include "statement.h"
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#include "stmt.h"
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#include "syntax.h"
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#include "tok.h"
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#include "variable.h"
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/*
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VARIABLE ANALYSIS FLAGS
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The flag suppress_variable may be set to 1 to suppress variable
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analysis on function parameters and to 2 to suppress all variable
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analysis. The flag anon_c_linkage may be set to true to indicate
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that objects with C linkage in anonymous namespaces are anonymous.
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*/
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int suppress_variable = 0 ;
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int anon_c_linkage = 0 ;
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/*
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CHECK A VARIABLE OR FUNCTION USAGE
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This routine checks the usage of the identifier id. The flag anon
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is true if the complete reach of the identifier is being analysed. For
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example, the reach of a local variable is its scope, that of an internal
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variable is its translation unit, and that of an external variable is
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its entire program.
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*/
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static void check_usage
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PROTO_N ( ( id, blk, anon ) )
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PROTO_T ( IDENTIFIER id X EXP blk X int anon )
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{
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int opt ;
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ERROR err ;
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LOCATION loc ;
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HASHID nm = DEREF_hashid ( id_name ( id ) ) ;
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if ( !IS_hashid_anon ( nm ) ) {
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/* Ignore anonymous identifiers */
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DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
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if ( anon == ANON_NAMESPACE && ( ds & dspec_c ) ) {
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if ( !anon_c_linkage ) anon = ANON_NONE ;
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}
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if ( ds & dspec_static ) {
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if ( !IS_NULL_exp ( blk ) || suppress_variable == 2 ) {
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/* Global statics are external to a block etc. */
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ds |= dspec_extern ;
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}
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}
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if ( anon || !( ds & dspec_extern ) ) {
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if ( ds & dspec_implicit ) {
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/* Ignore implicitly declared constructors etc. */
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/* EMPTY */
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} else if ( ds & ( dspec_inherit | dspec_alias ) ) {
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/* Don't deal with inherited members here */
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/* EMPTY */
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} else if ( ds & dspec_token ) {
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/* Ignore tokenised identifiers */
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/* EMPTY */
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} else if ( ds & dspec_defn ) {
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if ( ds & dspec_used ) {
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/* Defined and used */
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/* EMPTY */
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} else {
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/* Defined but not used */
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if ( ds & ( dspec_inline | dspec_virtual ) ) {
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/* Ignore inline and virtual functions */
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/* EMPTY */
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} else {
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if ( ds & dspec_auto ) {
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err = ERR_stmt_dcl_unused ( id ) ;
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} else {
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if ( ds & dspec_static ) {
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opt = OPT_discard_static ;
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} else {
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opt = OPT_variable ;
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}
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err = ERR_basic_odr_unused ( id ) ;
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err = set_severity ( err, opt, 0 ) ;
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}
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if ( !IS_NULL_err ( err ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, err ) ;
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}
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}
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}
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} else {
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if ( ds & dspec_used ) {
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/* Used but not defined */
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if ( IS_id_class_name_etc ( id ) ) {
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/* Alright for type names */
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/* EMPTY */
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} else {
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if ( ds & dspec_inline ) {
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err = ERR_basic_odr_inline ( id ) ;
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} else {
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err = ERR_basic_odr_undef ( id ) ;
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}
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if ( !IS_NULL_err ( err ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, err ) ;
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}
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ds |= dspec_defn ;
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COPY_dspec ( id_storage ( id ), ds ) ;
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}
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} else if ( ds & dspec_virtual ) {
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/* Undefined virtual function */
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if ( ds & dspec_pure ) {
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/* Allow pure virtual functions */
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/* EMPTY */
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} else {
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err = ERR_basic_odr_undef ( id ) ;
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if ( !IS_NULL_err ( err ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, err ) ;
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}
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}
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} else if ( ds & dspec_inline ) {
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/* Ignore inline functions */
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/* EMPTY */
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} else {
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/* Not used or defined */
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if ( ds & dspec_static ) {
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opt = OPT_discard_static ;
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} else {
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opt = OPT_variable ;
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}
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err = ERR_basic_odr_redundant ( id ) ;
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err = set_severity ( err, opt, 0 ) ;
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if ( !IS_NULL_err ( err ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, err ) ;
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}
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}
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}
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}
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}
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return ;
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}
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/*
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CHECK A TEMPLATE IDENTIFIER
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This routine calls check_identifier for each instance of the template
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id. t gives the template type, otherwise the parameters are as in
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check_identifier.
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*/
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static void check_template_id
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PROTO_N ( ( t, id, ns, blk, anon, chk ) )
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PROTO_T ( TYPE t X IDENTIFIER id X NAMESPACE ns X EXP blk X
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int anon X int chk )
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{
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DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
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if ( !( ds & dspec_done ) ) {
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/* Scan through template applications */
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TOKEN sort = DEREF_tok ( type_templ_sort ( t ) ) ;
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INSTANCE apps = DEREF_inst ( tok_templ_apps ( sort ) ) ;
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COPY_dspec ( id_storage ( id ), ( ds | dspec_done ) ) ;
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while ( !IS_NULL_inst ( apps ) ) {
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DECL_SPEC acc = DEREF_dspec ( inst_templ_access ( apps ) ) ;
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if ( !( acc & ( dspec_main | dspec_alias ) ) ) {
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if ( ( acc & dspec_instance ) && !( acc & dspec_mutable ) ) {
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IDENTIFIER aid = DEREF_id ( inst_templ_id ( apps ) ) ;
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IGNORE check_identifier ( aid, ns, blk, anon, chk ) ;
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}
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}
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apps = DEREF_inst ( inst_next ( apps ) ) ;
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}
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if ( spec_unit ) spec_unit = save_end ( spec_unit, NULL_nspace ) ;
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COPY_dspec ( id_storage ( id ), ds ) ;
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}
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return ;
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}
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/*
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CHECK A CLASS USAGE
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This routine checks the class usage information cu for the type ct.
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*/
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static void check_class_usage
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PROTO_N ( ( ct, cu ) )
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PROTO_T ( CLASS_TYPE ct X CLASS_USAGE cu )
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{
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LOCATION loc ;
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if ( cu & cusage_destr ) {
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IDENTIFIER id = DEREF_id ( ctype_destr ( ct ) ) ;
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if ( !IS_NULL_id ( id ) && IS_id_mem_func ( id ) ) {
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DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
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if ( !( ds & dspec_trivial ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, ERR_expr_delete_post ( id ) ) ;
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}
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}
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}
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if ( cu & cusage_delete ) {
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IDENTIFIER id = find_operator ( ct, lex_delete ) ;
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if ( !IS_NULL_id ( id ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, ERR_expr_delete_post ( id ) ) ;
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}
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}
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if ( cu & cusage_delete_array ) {
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IDENTIFIER id = find_operator ( ct, lex_delete_Harray ) ;
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if ( !IS_NULL_id ( id ) ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, ERR_expr_delete_post ( id ) ) ;
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}
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}
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if ( cu & cusage_address ) {
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IDENTIFIER id = find_operator ( ct, lex_and_H1 ) ;
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while ( !IS_NULL_id ( id ) && IS_id_function_etc ( id ) ) {
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TYPE t = DEREF_type ( id_function_etc_type ( id ) ) ;
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if ( min_no_args ( t ) == 1 ) {
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DEREF_loc ( id_loc ( id ), loc ) ;
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report ( loc, ERR_expr_unary_op_ref_post ( id ) ) ;
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break ;
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}
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id = DEREF_id ( id_function_etc_over ( id ) ) ;
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}
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}
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return ;
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}
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/*
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COMPLETE A TENTATIVE DEFINITION
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This routine completes a C-style tentative definition of the
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variable id. That is, if id has not been defined elsewhere, then
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it is defined to be zero.
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*/
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static int define_tentative
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PROTO_N ( ( id, anon ) )
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PROTO_T ( IDENTIFIER id X int anon )
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{
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int def = 0 ;
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EXP e = DEREF_exp ( id_variable_etc_init ( id ) ) ;
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if ( !IS_NULL_exp ( e ) && IS_exp_zero ( e ) ) {
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LOCATION loc ;
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DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
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TYPE t = DEREF_type ( id_variable_etc_type ( id ) ) ;
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bad_crt_loc++ ;
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loc = crt_loc ;
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DEREF_loc ( id_loc ( id ), crt_loc ) ;
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if ( anon || !( ds & dspec_extern ) ) {
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/* Types for internal objects should be complete */
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ERROR err = check_complete ( t ) ;
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if ( !IS_NULL_err ( err ) ) {
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ERROR err2 = ERR_basic_types_tent_incompl ( id ) ;
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err = concat_error ( err, err2 ) ;
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report ( crt_loc, err ) ;
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}
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}
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if ( IS_type_array ( t ) ) {
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/* Complete array 'A []' to 'A [1]' */
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NAT n = DEREF_nat ( type_array_size ( t ) ) ;
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if ( IS_NULL_nat ( n ) ) {
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CV_SPEC qual = DEREF_cv ( type_qual ( t ) ) ;
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TYPE s = DEREF_type ( type_array_sub ( t ) ) ;
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n = small_nat [1] ;
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MAKE_type_array ( qual, s, n, t ) ;
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COPY_type ( id_variable_etc_type ( id ), t ) ;
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}
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}
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e = init_general ( t, NULL_exp, id, 0 ) ;
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COPY_exp ( id_variable_etc_init ( id ), e ) ;
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define_id ( id ) ;
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crt_loc = loc ;
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bad_crt_loc-- ;
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def = 1 ;
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}
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return ( def ) ;
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}
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345 |
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346 |
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/*
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348 |
CHECK A GLOBAL IDENTIFIER
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349 |
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350 |
This routine applies the global program checks to the identifier id
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351 |
from the namespace ns. If id is a class or namespace name then the
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|
352 |
checks are also applied recursively to the members of id. The flag
|
|
|
353 |
anon is true if the parent namespace of id is local to the current
|
|
|
354 |
translation unit. The routine returns the number of identifiers in
|
|
|
355 |
id (allowing for overloaded functions).
|
|
|
356 |
*/
|
|
|
357 |
|
|
|
358 |
unsigned long check_identifier
|
|
|
359 |
PROTO_N ( ( id, ns, blk, anon, chk ) )
|
|
|
360 |
PROTO_T ( IDENTIFIER id X NAMESPACE ns X EXP blk X int anon X int chk )
|
|
|
361 |
{
|
|
|
362 |
unsigned long n = 1 ;
|
|
|
363 |
if ( spec_unit ) spec_unit = save_id ( spec_unit, id, ns ) ;
|
|
|
364 |
switch ( TAG_id ( id ) ) {
|
|
|
365 |
|
|
|
366 |
case id_class_name_tag : {
|
|
|
367 |
/* Check the members of a class */
|
|
|
368 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
369 |
if ( !( ds & dspec_implicit ) ) {
|
|
|
370 |
int templ = 0 ;
|
|
|
371 |
CLASS_TYPE ct ;
|
|
|
372 |
CLASS_INFO ci ;
|
|
|
373 |
NAMESPACE cns ;
|
|
|
374 |
int tchk = chk ;
|
|
|
375 |
TYPE t = DEREF_type ( id_class_name_defn ( id ) ) ;
|
|
|
376 |
TYPE s = t ;
|
|
|
377 |
while ( IS_type_templ ( t ) ) {
|
|
|
378 |
/* Template classes */
|
|
|
379 |
templ = 1 ;
|
|
|
380 |
tchk = 0 ;
|
|
|
381 |
t = DEREF_type ( type_templ_defn ( t ) ) ;
|
|
|
382 |
}
|
|
|
383 |
ct = DEREF_ctype ( type_compound_defn ( t ) ) ;
|
|
|
384 |
cns = DEREF_nspace ( ctype_member ( ct ) ) ;
|
|
|
385 |
ci = DEREF_cinfo ( ctype_info ( ct ) ) ;
|
|
|
386 |
if ( ci & cinfo_complete ) {
|
|
|
387 |
/* Check class member namespace */
|
|
|
388 |
CLASS_USAGE cu = DEREF_cusage ( ctype_usage ( ct ) ) ;
|
|
|
389 |
IDENTIFIER cid = DEREF_id ( ctype_name ( ct ) ) ;
|
|
|
390 |
HASHID cnm = DEREF_hashid ( id_name ( cid ) ) ;
|
|
|
391 |
if ( IS_hashid_anon ( cnm ) ) anon = ANON_CLASS ;
|
|
|
392 |
#if LANGUAGE_CPP
|
|
|
393 |
if ( ( ci & cinfo_polymorphic ) && tchk ) {
|
|
|
394 |
/* Compile virtual function table */
|
|
|
395 |
compile_virtual ( ct, anon ) ;
|
|
|
396 |
}
|
|
|
397 |
#endif
|
|
|
398 |
if ( cu != cusage_none ) {
|
|
|
399 |
/* Check class usage */
|
|
|
400 |
check_class_usage ( ct, cu ) ;
|
|
|
401 |
}
|
|
|
402 |
} else {
|
|
|
403 |
if ( ( ci & cinfo_incomplete ) && tchk ) {
|
|
|
404 |
/* Report incomplete types */
|
|
|
405 |
complete_class ( ct, 0 ) ;
|
|
|
406 |
ci = DEREF_cinfo ( ctype_info ( ct ) ) ;
|
|
|
407 |
if ( !( ci & cinfo_complete ) ) {
|
|
|
408 |
ERROR err = ERR_basic_types_completed ( t ) ;
|
|
|
409 |
if ( !IS_NULL_err ( err ) ) {
|
|
|
410 |
LOCATION loc ;
|
|
|
411 |
DEREF_loc ( id_loc ( id ), loc ) ;
|
|
|
412 |
report ( loc, err ) ;
|
|
|
413 |
}
|
|
|
414 |
}
|
|
|
415 |
}
|
|
|
416 |
cns = NULL_nspace ;
|
|
|
417 |
}
|
|
|
418 |
IGNORE check_namespace ( cns, NULL_exp, anon, tchk ) ;
|
|
|
419 |
if ( templ ) {
|
|
|
420 |
/* Template classes */
|
|
|
421 |
check_template_id ( s, id, ns, blk, anon, chk ) ;
|
|
|
422 |
}
|
|
|
423 |
}
|
|
|
424 |
goto type_label ;
|
|
|
425 |
}
|
|
|
426 |
|
|
|
427 |
case id_enum_name_tag :
|
|
|
428 |
case id_class_alias_tag :
|
|
|
429 |
case id_enum_alias_tag :
|
|
|
430 |
case id_type_alias_tag :
|
|
|
431 |
type_label : {
|
|
|
432 |
/* Compile type names */
|
|
|
433 |
if ( chk ) {
|
|
|
434 |
if ( anon ) check_usage ( id, blk, anon ) ;
|
|
|
435 |
if ( IS_NULL_exp ( blk ) ) compile_type ( id ) ;
|
|
|
436 |
}
|
|
|
437 |
break ;
|
|
|
438 |
}
|
|
|
439 |
|
|
|
440 |
case id_nspace_name_tag : {
|
|
|
441 |
/* Check the members of a namespace */
|
|
|
442 |
NAMESPACE cns = DEREF_nspace ( id_nspace_name_defn ( id ) ) ;
|
|
|
443 |
n += check_namespace ( cns, NULL_exp, anon, chk ) ;
|
|
|
444 |
break ;
|
|
|
445 |
}
|
|
|
446 |
|
|
|
447 |
case id_variable_tag : {
|
|
|
448 |
/* Check variable usage */
|
|
|
449 |
if ( chk ) {
|
|
|
450 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
451 |
if ( ( ds & dspec_static ) && preserve_all ) {
|
|
|
452 |
compile_preserve ( id ) ;
|
|
|
453 |
}
|
|
|
454 |
check_usage ( id, blk, anon ) ;
|
|
|
455 |
if ( IS_NULL_exp ( blk ) ) {
|
|
|
456 |
if ( ds & dspec_defn ) {
|
|
|
457 |
IGNORE define_tentative ( id, anon ) ;
|
|
|
458 |
}
|
|
|
459 |
compile_variable ( id, 0 ) ;
|
|
|
460 |
} else {
|
|
|
461 |
/* End of local block */
|
|
|
462 |
if ( ds & dspec_auto ) {
|
|
|
463 |
EXP term ;
|
|
|
464 |
ds &= ~dspec_access ;
|
|
|
465 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
466 |
term = DEREF_exp ( id_variable_etc_term ( id ) ) ;
|
|
|
467 |
if ( !IS_NULL_exp ( term ) ) {
|
|
|
468 |
if ( do_usage ) dump_destr ( id, &stmt_loc ) ;
|
|
|
469 |
}
|
|
|
470 |
}
|
|
|
471 |
}
|
|
|
472 |
}
|
|
|
473 |
break ;
|
|
|
474 |
}
|
|
|
475 |
|
|
|
476 |
case id_parameter_tag : {
|
|
|
477 |
/* Check parameter usage */
|
|
|
478 |
if ( chk && suppress_variable == 0 ) {
|
|
|
479 |
check_usage ( id, blk, anon ) ;
|
|
|
480 |
}
|
|
|
481 |
break ;
|
|
|
482 |
}
|
|
|
483 |
|
|
|
484 |
case id_stat_member_tag : {
|
|
|
485 |
/* Check static data member usage */
|
|
|
486 |
if ( anon == ANON_CLASS ) {
|
|
|
487 |
LOCATION loc ;
|
|
|
488 |
DEREF_loc ( id_loc ( id ), loc ) ;
|
|
|
489 |
report ( loc, ERR_class_static_data_anon ( id ) ) ;
|
|
|
490 |
}
|
|
|
491 |
if ( chk ) {
|
|
|
492 |
check_usage ( id, blk, anon ) ;
|
|
|
493 |
if ( IS_NULL_exp ( blk ) ) {
|
|
|
494 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
495 |
if ( ds & dspec_defn ) {
|
|
|
496 |
IGNORE define_tentative ( id, anon ) ;
|
|
|
497 |
}
|
|
|
498 |
compile_variable ( id, 0 ) ;
|
|
|
499 |
}
|
|
|
500 |
}
|
|
|
501 |
break ;
|
|
|
502 |
}
|
|
|
503 |
|
|
|
504 |
case id_function_tag :
|
|
|
505 |
case id_mem_func_tag :
|
|
|
506 |
case id_stat_mem_func_tag : {
|
|
|
507 |
/* Check member function usage */
|
|
|
508 |
TYPE t = DEREF_type ( id_function_etc_type ( id ) ) ;
|
|
|
509 |
IDENTIFIER over = DEREF_id ( id_function_etc_over ( id ) ) ;
|
|
|
510 |
if ( !IS_NULL_id ( over ) ) {
|
|
|
511 |
n += check_identifier ( over, ns, blk, anon, chk ) ;
|
|
|
512 |
}
|
|
|
513 |
if ( IS_type_func ( t ) ) {
|
|
|
514 |
/* Simple functions */
|
|
|
515 |
if ( chk ) {
|
|
|
516 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
517 |
if ( ( ds & dspec_static ) && preserve_all ) {
|
|
|
518 |
compile_preserve ( id ) ;
|
|
|
519 |
}
|
|
|
520 |
if ( ds & dspec_inline ) {
|
|
|
521 |
if ( !anon ) anon = ANON_INLINE ;
|
|
|
522 |
}
|
|
|
523 |
check_usage ( id, blk, anon ) ;
|
|
|
524 |
if ( IS_NULL_exp ( blk ) ) compile_function ( id, 0 ) ;
|
|
|
525 |
}
|
|
|
526 |
} else {
|
|
|
527 |
/* Template functions */
|
|
|
528 |
check_template_id ( t, id, ns, blk, anon, chk ) ;
|
|
|
529 |
}
|
|
|
530 |
break ;
|
|
|
531 |
}
|
|
|
532 |
|
|
|
533 |
case id_enumerator_tag : {
|
|
|
534 |
/* Check enumerator value */
|
|
|
535 |
if ( chk ) {
|
|
|
536 |
EXP e = DEREF_exp ( id_enumerator_value ( id ) ) ;
|
|
|
537 |
if ( overflow_exp ( e ) ) compile_variable ( id, 0 ) ;
|
|
|
538 |
}
|
|
|
539 |
break ;
|
|
|
540 |
}
|
|
|
541 |
|
|
|
542 |
case id_nspace_alias_tag :
|
|
|
543 |
case id_member_tag :
|
|
|
544 |
case id_weak_param_tag : {
|
|
|
545 |
/* Don't check these (yet) */
|
|
|
546 |
break ;
|
|
|
547 |
}
|
|
|
548 |
}
|
|
|
549 |
return ( n ) ;
|
|
|
550 |
}
|
|
|
551 |
|
|
|
552 |
|
|
|
553 |
/*
|
|
|
554 |
CHECK A NAMESPACE
|
|
|
555 |
|
|
|
556 |
This routine scans through all the members of the namespace ns, calling
|
|
|
557 |
check_identifier for each member (including hidden members) and
|
|
|
558 |
compiling any functions or non-local variables. It returns the number
|
|
|
559 |
of identifiers declared in ns. ns may be a block scope associated
|
|
|
560 |
with the statement blk. The flag anon is true if the parent namespace
|
|
|
561 |
of ns is local to the current translation unit.
|
|
|
562 |
*/
|
|
|
563 |
|
|
|
564 |
unsigned long check_namespace
|
|
|
565 |
PROTO_N ( ( ns, blk, anon, chk ) )
|
|
|
566 |
PROTO_T ( NAMESPACE ns X EXP blk X int anon X int chk )
|
|
|
567 |
{
|
|
|
568 |
unsigned long n = 0 ;
|
|
|
569 |
if ( !IS_NULL_nspace ( ns ) ) {
|
|
|
570 |
MEMBER mem ;
|
|
|
571 |
LIST ( IDENTIFIER ) extra ;
|
|
|
572 |
|
|
|
573 |
/* Find namespace components */
|
|
|
574 |
switch ( TAG_nspace ( ns ) ) {
|
|
|
575 |
case nspace_named_tag :
|
|
|
576 |
case nspace_global_tag :
|
|
|
577 |
case nspace_ctype_tag : {
|
|
|
578 |
mem = DEREF_member ( nspace_named_etc_first ( ns ) ) ;
|
|
|
579 |
extra = DEREF_list ( nspace_named_etc_extra ( ns ) ) ;
|
|
|
580 |
break ;
|
|
|
581 |
}
|
|
|
582 |
case nspace_unnamed_tag : {
|
|
|
583 |
mem = DEREF_member ( nspace_unnamed_first ( ns ) ) ;
|
|
|
584 |
extra = DEREF_list ( nspace_unnamed_extra ( ns ) ) ;
|
|
|
585 |
if ( anon != ANON_GLOBAL && suppress_variable != 2 ) {
|
|
|
586 |
anon = ANON_NAMESPACE ;
|
|
|
587 |
}
|
|
|
588 |
break ;
|
|
|
589 |
}
|
|
|
590 |
default : {
|
|
|
591 |
mem = DEREF_member ( nspace_last ( ns ) ) ;
|
|
|
592 |
extra = NULL_list ( IDENTIFIER ) ;
|
|
|
593 |
anon = ANON_NONE ;
|
|
|
594 |
break ;
|
|
|
595 |
}
|
|
|
596 |
}
|
|
|
597 |
|
|
|
598 |
/* Scan through namespace members */
|
|
|
599 |
while ( !IS_NULL_member ( mem ) ) {
|
|
|
600 |
IDENTIFIER id = DEREF_id ( member_id ( mem ) ) ;
|
|
|
601 |
IDENTIFIER alt = DEREF_id ( member_alt ( mem ) ) ;
|
|
|
602 |
if ( !IS_NULL_id ( id ) ) {
|
|
|
603 |
n += check_identifier ( id, ns, blk, anon, chk ) ;
|
|
|
604 |
}
|
|
|
605 |
if ( !IS_NULL_id ( alt ) && !EQ_id ( id, alt ) ) {
|
|
|
606 |
n += check_identifier ( alt, ns, blk, anon, chk ) ;
|
|
|
607 |
}
|
|
|
608 |
mem = DEREF_member ( member_next ( mem ) ) ;
|
|
|
609 |
}
|
|
|
610 |
|
|
|
611 |
/* Scan through extra namespace members */
|
|
|
612 |
while ( !IS_NULL_list ( extra ) ) {
|
|
|
613 |
IDENTIFIER id = DEREF_id ( HEAD_list ( extra ) ) ;
|
|
|
614 |
n += check_identifier ( id, ns, blk, anon, chk ) ;
|
|
|
615 |
extra = TAIL_list ( extra ) ;
|
|
|
616 |
}
|
|
|
617 |
}
|
|
|
618 |
if ( spec_unit ) spec_unit = save_end ( spec_unit, ns ) ;
|
|
|
619 |
return ( n ) ;
|
|
|
620 |
}
|
|
|
621 |
|
|
|
622 |
|
|
|
623 |
/*
|
|
|
624 |
CHECK THE TOKEN NAMESPACE
|
|
|
625 |
|
|
|
626 |
This routine applies the usage checks to the tokens declared in the
|
|
|
627 |
translation unit.
|
|
|
628 |
*/
|
|
|
629 |
|
|
|
630 |
static void check_token
|
|
|
631 |
PROTO_Z ()
|
|
|
632 |
{
|
|
|
633 |
NAMESPACE ns = token_namespace ;
|
|
|
634 |
MEMBER mem = DEREF_member ( nspace_global_first ( ns ) ) ;
|
|
|
635 |
while ( !IS_NULL_member ( mem ) ) {
|
|
|
636 |
IDENTIFIER id = DEREF_id ( member_id ( mem ) ) ;
|
|
|
637 |
if ( !IS_NULL_id ( id ) ) {
|
|
|
638 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
639 |
if ( !( ds & dspec_done ) ) {
|
|
|
640 |
if ( ds & dspec_defn ) {
|
|
|
641 |
/* Defined token */
|
|
|
642 |
compile_token ( id, 1 ) ;
|
|
|
643 |
} else if ( !( ds & dspec_pure ) ) {
|
|
|
644 |
/* Undefined token */
|
|
|
645 |
LOCATION loc ;
|
|
|
646 |
TOKEN tok = DEREF_tok ( id_token_sort ( id ) ) ;
|
|
|
647 |
bad_crt_loc++ ;
|
|
|
648 |
loc = crt_loc ;
|
|
|
649 |
DEREF_loc ( id_loc ( id ), crt_loc ) ;
|
|
|
650 |
if ( IS_tok_func ( tok ) ) {
|
|
|
651 |
/* Implicitly define 'FUNC' tokens */
|
|
|
652 |
IDENTIFIER fn = DEREF_id ( id_token_alt ( id ) ) ;
|
|
|
653 |
COPY_id ( tok_func_defn ( tok ), fn ) ;
|
|
|
654 |
ds |= dspec_defn ;
|
|
|
655 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
656 |
if ( !( ds & dspec_explicit ) ) {
|
|
|
657 |
/* Not explicitly redeclared */
|
|
|
658 |
report ( crt_loc, ERR_token_def_implicit ( id ) ) ;
|
|
|
659 |
}
|
|
|
660 |
use_func_id ( fn, 0, 0 ) ;
|
|
|
661 |
compile_function ( fn, 0 ) ;
|
|
|
662 |
compile_token ( id, 1 ) ;
|
|
|
663 |
} else if ( ds & dspec_static ) {
|
|
|
664 |
/* Check for built-in token definitions */
|
|
|
665 |
if ( builtin_token ( id ) != -1 ) {
|
|
|
666 |
ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
667 |
if ( !( ds & dspec_defn ) ) {
|
|
|
668 |
compile_token ( id, 0 ) ;
|
|
|
669 |
}
|
|
|
670 |
} else if ( suppress_variable != 2 ) {
|
|
|
671 |
compile_token ( id, 0 ) ;
|
|
|
672 |
}
|
|
|
673 |
}
|
|
|
674 |
crt_loc = loc ;
|
|
|
675 |
bad_crt_loc-- ;
|
|
|
676 |
}
|
|
|
677 |
}
|
|
|
678 |
}
|
|
|
679 |
mem = DEREF_member ( member_next ( mem ) ) ;
|
|
|
680 |
}
|
|
|
681 |
return ;
|
|
|
682 |
}
|
|
|
683 |
|
|
|
684 |
|
|
|
685 |
/*
|
|
|
686 |
CHECK THE GLOBAL NAMESPACE
|
|
|
687 |
|
|
|
688 |
This routine applies check_namespace to the global namespace,
|
|
|
689 |
including checking the main function if complete is true. It also
|
|
|
690 |
calls check_token.
|
|
|
691 |
*/
|
|
|
692 |
|
|
|
693 |
unsigned long check_global
|
|
|
694 |
PROTO_N ( ( complete ) )
|
|
|
695 |
PROTO_T ( int complete )
|
|
|
696 |
{
|
|
|
697 |
/* Check main function if necessary */
|
|
|
698 |
unsigned long n ;
|
|
|
699 |
int anon = ANON_NONE ;
|
|
|
700 |
NAMESPACE ns = global_namespace ;
|
|
|
701 |
if ( complete && suppress_variable != 2 ) {
|
|
|
702 |
IDENTIFIER id = main_function ;
|
|
|
703 |
HASHID nm = KEYWORD ( lex_main ) ;
|
|
|
704 |
if ( IS_NULL_id ( id ) ) {
|
|
|
705 |
/* Look up if not defined */
|
|
|
706 |
MEMBER mem = search_member ( ns, nm, 0 ) ;
|
|
|
707 |
if ( !IS_NULL_member ( mem ) ) {
|
|
|
708 |
id = DEREF_id ( member_id ( mem ) ) ;
|
|
|
709 |
if ( !IS_NULL_id ( id ) && IS_id_function ( id ) ) {
|
|
|
710 |
main_function = id ;
|
|
|
711 |
} else {
|
|
|
712 |
id = NULL_id ;
|
|
|
713 |
}
|
|
|
714 |
}
|
|
|
715 |
}
|
|
|
716 |
if ( IS_NULL_id ( id ) ) {
|
|
|
717 |
id = DEREF_id ( hashid_id ( nm ) ) ;
|
|
|
718 |
id = underlying_id ( id ) ;
|
|
|
719 |
report ( builtin_loc, ERR_basic_odr_undef ( id ) ) ;
|
|
|
720 |
} else {
|
|
|
721 |
/* Mark as being used */
|
|
|
722 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
723 |
ds |= ( dspec_used | dspec_called ) ;
|
|
|
724 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
725 |
}
|
|
|
726 |
anon = ANON_GLOBAL ;
|
|
|
727 |
}
|
|
|
728 |
|
|
|
729 |
/* Apply checks to namespaces */
|
|
|
730 |
begin_spec () ;
|
|
|
731 |
n = check_namespace ( ns, NULL_exp, anon, 1 ) ;
|
|
|
732 |
end_spec () ;
|
|
|
733 |
check_token () ;
|
|
|
734 |
return ( n ) ;
|
|
|
735 |
}
|
|
|
736 |
|
|
|
737 |
|
|
|
738 |
/*
|
|
|
739 |
CONSTRUCT A SET EXPRESSION
|
|
|
740 |
|
|
|
741 |
This routine constructs the expression 'set ( a )'.
|
|
|
742 |
*/
|
|
|
743 |
|
|
|
744 |
EXP make_set_exp
|
|
|
745 |
PROTO_N ( ( a ) )
|
|
|
746 |
PROTO_T ( EXP a )
|
|
|
747 |
{
|
|
|
748 |
EXP e ;
|
|
|
749 |
a = convert_reference ( a, REF_NORMAL ) ;
|
|
|
750 |
a = convert_lvalue ( a ) ;
|
|
|
751 |
MAKE_exp_set ( type_void, a, e ) ;
|
|
|
752 |
return ( e ) ;
|
|
|
753 |
}
|
|
|
754 |
|
|
|
755 |
|
|
|
756 |
/*
|
|
|
757 |
CONSTRUCT AN UNUSED EXPRESSION
|
|
|
758 |
|
|
|
759 |
This routine constructs the expression 'unused ( a )'.
|
|
|
760 |
*/
|
|
|
761 |
|
|
|
762 |
EXP make_unused_exp
|
|
|
763 |
PROTO_N ( ( a ) )
|
|
|
764 |
PROTO_T ( EXP a )
|
|
|
765 |
{
|
|
|
766 |
EXP e ;
|
|
|
767 |
a = convert_reference ( a, REF_NORMAL ) ;
|
|
|
768 |
a = convert_lvalue ( a ) ;
|
|
|
769 |
MAKE_exp_unused ( type_void, a, e ) ;
|
|
|
770 |
return ( e ) ;
|
|
|
771 |
}
|
|
|
772 |
|
|
|
773 |
|
|
|
774 |
/*
|
|
|
775 |
PRESERVE ALL STATIC IDENTIFIERS
|
|
|
776 |
|
|
|
777 |
This flag is set to true to indicate that all static identifiers
|
|
|
778 |
should be preserved.
|
|
|
779 |
*/
|
|
|
780 |
|
|
|
781 |
int preserve_all = 0 ;
|
|
|
782 |
|
|
|
783 |
|
|
|
784 |
/*
|
|
|
785 |
PRESERVE AN IDENTIFIER
|
|
|
786 |
|
|
|
787 |
This routine preserves or suspends the static identifier id, as
|
|
|
788 |
indicated by the action act.
|
|
|
789 |
*/
|
|
|
790 |
|
|
|
791 |
void preserve_id
|
|
|
792 |
PROTO_N ( ( id, act ) )
|
|
|
793 |
PROTO_T ( IDENTIFIER id X int act )
|
|
|
794 |
{
|
|
|
795 |
switch ( TAG_id ( id ) ) {
|
|
|
796 |
case id_function_tag : {
|
|
|
797 |
IDENTIFIER over = DEREF_id ( id_function_over ( id ) ) ;
|
|
|
798 |
if ( !IS_NULL_id ( over ) ) preserve_id ( over, act ) ;
|
|
|
799 |
goto action_lab ;
|
|
|
800 |
}
|
|
|
801 |
case id_variable_tag :
|
|
|
802 |
action_lab : {
|
|
|
803 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
804 |
if ( ds & dspec_static ) {
|
|
|
805 |
if ( act == lex_preserve ) {
|
|
|
806 |
compile_preserve ( id ) ;
|
|
|
807 |
} else if ( act == lex_suspend ) {
|
|
|
808 |
ds |= dspec_used ;
|
|
|
809 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
810 |
}
|
|
|
811 |
}
|
|
|
812 |
break ;
|
|
|
813 |
}
|
|
|
814 |
default : {
|
|
|
815 |
ERROR err = ERR_pragma_preserve_undecl ( act, id ) ;
|
|
|
816 |
report ( preproc_loc, err ) ;
|
|
|
817 |
break ;
|
|
|
818 |
}
|
|
|
819 |
}
|
|
|
820 |
return ;
|
|
|
821 |
}
|
|
|
822 |
|
|
|
823 |
|
|
|
824 |
/*
|
|
|
825 |
FLOW ANALYSIS FLAGS
|
|
|
826 |
|
|
|
827 |
These values are used to mark the various usage states in the flow
|
|
|
828 |
analysis routines. The fact that va_variable equals dspec_auto and
|
|
|
829 |
va_done equals dspec_done is important, but the other values are
|
|
|
830 |
merely convenient.
|
|
|
831 |
*/
|
|
|
832 |
|
|
|
833 |
typedef DECL_SPEC VAR_INFO ;
|
|
|
834 |
|
|
|
835 |
#define va_none dspec_none
|
|
|
836 |
#define va_used_this dspec_used
|
|
|
837 |
#define va_set dspec_defn
|
|
|
838 |
#define va_maybe_set dspec_inherit
|
|
|
839 |
|
|
|
840 |
#define va_filter ( va_used_this | va_set | va_maybe_set )
|
|
|
841 |
|
|
|
842 |
#define va_any_use dspec_static
|
|
|
843 |
#define va_any_set dspec_extern
|
|
|
844 |
|
|
|
845 |
#define va_done dspec_done
|
|
|
846 |
#define va_variable dspec_auto
|
|
|
847 |
#define va_ignore dspec_ignore
|
|
|
848 |
#define va_error dspec_implicit
|
|
|
849 |
|
|
|
850 |
#define va_address dspec_register
|
|
|
851 |
#define va_assign dspec_mutable
|
|
|
852 |
#define va_alias_used dspec_inline
|
|
|
853 |
#define va_alias_set dspec_virtual
|
|
|
854 |
#define va_partial dspec_explicit
|
|
|
855 |
#define va_member dspec_friend
|
|
|
856 |
#define va_this dspec_typedef
|
|
|
857 |
#define va_dummy dspec_pure
|
|
|
858 |
|
|
|
859 |
#define va_alias ( va_alias_used | va_alias_set )
|
|
|
860 |
#define va_becomes ( va_assign | va_dummy )
|
|
|
861 |
#define va_other ( va_address | va_becomes | va_partial )
|
|
|
862 |
#define va_mask ( va_alias | va_other )
|
|
|
863 |
|
|
|
864 |
#define va_unreached dspec_main
|
|
|
865 |
|
|
|
866 |
|
|
|
867 |
/*
|
|
|
868 |
FORWARD DECLARATIONS
|
|
|
869 |
|
|
|
870 |
The following declarations are required for the flow analysis
|
|
|
871 |
routines.
|
|
|
872 |
*/
|
|
|
873 |
|
|
|
874 |
static VAR_INFO flow_exp PROTO_S ( ( EXP, VAR_INFO ) ) ;
|
|
|
875 |
static VAR_INFO flow_alias_exp PROTO_S ( ( EXP, VAR_INFO ) ) ;
|
|
|
876 |
static VAR_INFO flow_stmt PROTO_S ( ( EXP, VAR_INFO, int ) ) ;
|
|
|
877 |
static VAR_INFO flow_offset PROTO_S ( ( OFFSET, VAR_INFO, int ) ) ;
|
|
|
878 |
static void set_variable PROTO_S ( ( IDENTIFIER, VAR_INFO ) ) ;
|
|
|
879 |
|
|
|
880 |
|
|
|
881 |
/*
|
|
|
882 |
LIST OF CURRENTLY ACTIVE VARIABLES
|
|
|
883 |
|
|
|
884 |
The variable crt_flow_vars is used to hold a list of all the local
|
|
|
885 |
variables which are in scope at any point in the variable analysis
|
|
|
886 |
routines.
|
|
|
887 |
*/
|
|
|
888 |
|
|
|
889 |
typedef LIST ( VARIABLE ) VAR_LIST ;
|
|
|
890 |
static VAR_LIST crt_flow_vars = NULL_list ( VARIABLE ) ;
|
|
|
891 |
static VAR_LIST crt_flow_mems = NULL_list ( VARIABLE ) ;
|
|
|
892 |
static LIST ( IDENTIFIER ) crt_flow_assign = NULL_list ( IDENTIFIER ) ;
|
|
|
893 |
|
|
|
894 |
|
|
|
895 |
/*
|
|
|
896 |
START VARIABLE ANALYSIS
|
|
|
897 |
|
|
|
898 |
This routine is called at the start of the analysis of the local
|
|
|
899 |
variable id.
|
|
|
900 |
*/
|
|
|
901 |
|
|
|
902 |
static void start_variable
|
|
|
903 |
PROTO_N ( ( id, ds, use ) )
|
|
|
904 |
PROTO_T ( IDENTIFIER id X DECL_SPEC ds X VAR_INFO use )
|
|
|
905 |
{
|
|
|
906 |
VARIABLE var ;
|
|
|
907 |
use |= ( va_variable | va_done | va_used_this ) ;
|
|
|
908 |
if ( !( ds & dspec_used ) ) use |= va_ignore ;
|
|
|
909 |
var.id = id ;
|
|
|
910 |
var.info = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
911 |
COPY_dspec ( id_storage ( id ), use ) ;
|
|
|
912 |
CONS_var ( var, crt_flow_vars, crt_flow_vars ) ;
|
|
|
913 |
DEREF_loc ( id_loc ( id ), stmt_loc ) ;
|
|
|
914 |
return ;
|
|
|
915 |
}
|
|
|
916 |
|
|
|
917 |
|
|
|
918 |
/*
|
|
|
919 |
SHOULD VARIABLE ANALYSIS BE IGNORED?
|
|
|
920 |
|
|
|
921 |
This routine checks whether any variable analysis errors involving
|
|
|
922 |
the local variable id should be ignored. This is done if id is an
|
|
|
923 |
anonymous identifier or is a const variable all of whose uses have
|
|
|
924 |
been replaced by its definition (see convert_lvalue).
|
|
|
925 |
*/
|
|
|
926 |
|
|
|
927 |
static int ignore_variable
|
|
|
928 |
PROTO_N ( ( id ) )
|
|
|
929 |
PROTO_T ( IDENTIFIER id )
|
|
|
930 |
{
|
|
|
931 |
HASHID nm = DEREF_hashid ( id_name ( id ) ) ;
|
|
|
932 |
if ( IS_hashid_anon ( nm ) ) return ( 1 ) ;
|
|
|
933 |
if ( IS_id_variable ( id ) ) {
|
|
|
934 |
TYPE t = DEREF_type ( id_variable_type ( id ) ) ;
|
|
|
935 |
CV_SPEC cv = find_cv_qual ( t ) ;
|
|
|
936 |
if ( cv & cv_volatile ) {
|
|
|
937 |
/* Ignore volatile variables */
|
|
|
938 |
return ( 1 ) ;
|
|
|
939 |
}
|
|
|
940 |
if ( cv == ( cv_const | cv_lvalue ) ) {
|
|
|
941 |
/* Check for const variables */
|
|
|
942 |
EXP e = DEREF_exp ( id_variable_init ( id ) ) ;
|
|
|
943 |
if ( !IS_NULL_exp ( e ) ) {
|
|
|
944 |
if ( IS_exp_int_lit ( e ) ) return ( 1 ) ;
|
|
|
945 |
if ( IS_exp_null ( e ) ) return ( 1 ) ;
|
|
|
946 |
}
|
|
|
947 |
}
|
|
|
948 |
} else if ( IS_id_member ( id ) ) {
|
|
|
949 |
TYPE t = DEREF_type ( id_member_type ( id ) ) ;
|
|
|
950 |
CV_SPEC cv = find_cv_qual ( t ) ;
|
|
|
951 |
if ( cv & cv_volatile ) {
|
|
|
952 |
/* Ignore volatile members */
|
|
|
953 |
return ( 1 ) ;
|
|
|
954 |
}
|
|
|
955 |
}
|
|
|
956 |
return ( 0 ) ;
|
|
|
957 |
}
|
|
|
958 |
|
|
|
959 |
|
|
|
960 |
/*
|
|
|
961 |
END A VARIABLE SETTING
|
|
|
962 |
|
|
|
963 |
This routine marks the end of the variable setting ds. ret is true if
|
|
|
964 |
this end of scope is due to a return statement. In particular it
|
|
|
965 |
checks whether the variable has been assigned to and not used.
|
|
|
966 |
*/
|
|
|
967 |
|
|
|
968 |
static VAR_INFO end_usage
|
|
|
969 |
PROTO_N ( ( id, ds, ret ) )
|
|
|
970 |
PROTO_T ( IDENTIFIER id X VAR_INFO ds X int ret )
|
|
|
971 |
{
|
|
|
972 |
if ( ret && ( ds & va_member ) ) {
|
|
|
973 |
/* Class members are used after return */
|
|
|
974 |
if ( ret == 2 ) {
|
|
|
975 |
set_variable ( id, va_member ) ;
|
|
|
976 |
ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
977 |
} else {
|
|
|
978 |
ds |= va_used_this ;
|
|
|
979 |
}
|
|
|
980 |
} else if ( !( ds & va_used_this ) && ( ds & va_set ) ) {
|
|
|
981 |
if ( !( ds & va_ignore ) && !ignore_variable ( id ) ) {
|
|
|
982 |
report ( stmt_loc, ERR_stmt_dcl_reset ( id ) ) ;
|
|
|
983 |
ds |= va_error ;
|
|
|
984 |
}
|
|
|
985 |
ds |= va_used_this ;
|
|
|
986 |
}
|
|
|
987 |
return ( ds ) ;
|
|
|
988 |
}
|
|
|
989 |
|
|
|
990 |
|
|
|
991 |
/*
|
|
|
992 |
END VARIABLE ANALYSIS
|
|
|
993 |
|
|
|
994 |
This routine is called at the end of the analysis of a local
|
|
|
995 |
variable. Note that unused variable have already been dealt with.
|
|
|
996 |
*/
|
|
|
997 |
|
|
|
998 |
static void end_variable
|
|
|
999 |
PROTO_N ( ( flow, ret ) )
|
|
|
1000 |
PROTO_T ( int flow X int ret )
|
|
|
1001 |
{
|
|
|
1002 |
VARIABLE var ;
|
|
|
1003 |
DESTROY_CONS_var ( destroy, var, crt_flow_vars, crt_flow_vars ) ;
|
|
|
1004 |
if ( flow ) {
|
|
|
1005 |
VAR_INFO use = DEREF_dspec ( id_storage ( var.id ) ) ;
|
|
|
1006 |
use = end_usage ( var.id, use, ret ) ;
|
|
|
1007 |
if ( !( use & ( va_member | va_ignore ) ) ) {
|
|
|
1008 |
if ( !( use & va_any_use ) ) {
|
|
|
1009 |
/* Not used in reached code */
|
|
|
1010 |
if ( !ignore_variable ( var.id ) ) {
|
|
|
1011 |
LOCATION loc ;
|
|
|
1012 |
DEREF_loc ( id_loc ( var.id ), loc ) ;
|
|
|
1013 |
report ( loc, ERR_stmt_dcl_unused ( var.id ) ) ;
|
|
|
1014 |
}
|
|
|
1015 |
} else if ( !( use & va_any_set ) ) {
|
|
|
1016 |
/* Not set in reached code */
|
|
|
1017 |
if ( !( use & va_error ) && !ignore_variable ( var.id ) ) {
|
|
|
1018 |
LOCATION loc ;
|
|
|
1019 |
DEREF_loc ( id_loc ( var.id ), loc ) ;
|
|
|
1020 |
report ( loc, ERR_stmt_dcl_unset ( var.id ) ) ;
|
|
|
1021 |
}
|
|
|
1022 |
}
|
|
|
1023 |
}
|
|
|
1024 |
}
|
|
|
1025 |
COPY_dspec ( id_storage ( var.id ), var.info ) ;
|
|
|
1026 |
return ;
|
|
|
1027 |
}
|
|
|
1028 |
|
|
|
1029 |
|
|
|
1030 |
/*
|
|
|
1031 |
SET A VARIABLE
|
|
|
1032 |
|
|
|
1033 |
This routine adjusts the variable analysis information for the local
|
|
|
1034 |
variable use according to the analysis state use.
|
|
|
1035 |
*/
|
|
|
1036 |
|
|
|
1037 |
static void set_variable
|
|
|
1038 |
PROTO_N ( ( id, use ) )
|
|
|
1039 |
PROTO_T ( IDENTIFIER id X VAR_INFO use )
|
|
|
1040 |
{
|
|
|
1041 |
if ( !( use & va_unreached ) ) {
|
|
|
1042 |
VAR_INFO ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1043 |
if ( use & va_assign ) {
|
|
|
1044 |
/* Assignment */
|
|
|
1045 |
if ( use & va_dummy ) {
|
|
|
1046 |
set_variable ( id, va_none ) ;
|
|
|
1047 |
ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1048 |
}
|
|
|
1049 |
if ( use & va_partial ) {
|
|
|
1050 |
/* Partial assignment */
|
|
|
1051 |
ds |= ( va_maybe_set | va_any_set ) ;
|
|
|
1052 |
ds |= va_used_this ;
|
|
|
1053 |
} else {
|
|
|
1054 |
/* Complete assignment */
|
|
|
1055 |
ds = end_usage ( id, ds, 0 ) ;
|
|
|
1056 |
if ( ds & va_assign ) {
|
|
|
1057 |
if ( !( ds & va_ignore ) && !ignore_variable ( id ) ) {
|
|
|
1058 |
/* Multiple assignments */
|
|
|
1059 |
report ( stmt_loc, ERR_expr_ass_twice ( id ) ) ;
|
|
|
1060 |
ds |= va_error ;
|
|
|
1061 |
}
|
|
|
1062 |
}
|
|
|
1063 |
CONS_id ( id, crt_flow_assign, crt_flow_assign ) ;
|
|
|
1064 |
ds |= ( va_set | va_maybe_set | va_any_set | va_assign ) ;
|
|
|
1065 |
ds &= ~va_used_this ;
|
|
|
1066 |
}
|
|
|
1067 |
|
|
|
1068 |
} else if ( use & va_alias_set ) {
|
|
|
1069 |
/* Read-write alias */
|
|
|
1070 |
ds |= ( va_maybe_set | va_any_set ) ;
|
|
|
1071 |
ds |= ( va_used_this | va_any_use ) ;
|
|
|
1072 |
|
|
|
1073 |
} else if ( use & va_alias_used ) {
|
|
|
1074 |
/* Read-only alias */
|
|
|
1075 |
ds |= ( va_used_this | va_any_use ) ;
|
|
|
1076 |
|
|
|
1077 |
} else if ( use & va_address ) {
|
|
|
1078 |
/* Address */
|
|
|
1079 |
ds |= ( va_used_this | va_any_use ) ;
|
|
|
1080 |
|
|
|
1081 |
} else {
|
|
|
1082 |
/* Use */
|
|
|
1083 |
if ( !( ds & ( va_set | va_maybe_set ) ) ) {
|
|
|
1084 |
/* Used without being set */
|
|
|
1085 |
if ( !( ds & va_ignore ) && !ignore_variable ( id ) ) {
|
|
|
1086 |
ERROR err ;
|
|
|
1087 |
if ( use & va_member ) {
|
|
|
1088 |
err = ERR_class_base_init_none ( id ) ;
|
|
|
1089 |
} else {
|
|
|
1090 |
err = ERR_stmt_dcl_unset ( id ) ;
|
|
|
1091 |
}
|
|
|
1092 |
report ( stmt_loc, err ) ;
|
|
|
1093 |
ds |= va_error ;
|
|
|
1094 |
}
|
|
|
1095 |
ds |= ( va_maybe_set | va_any_set ) ;
|
|
|
1096 |
}
|
|
|
1097 |
ds |= ( va_used_this | va_any_use ) ;
|
|
|
1098 |
}
|
|
|
1099 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
1100 |
}
|
|
|
1101 |
return ;
|
|
|
1102 |
}
|
|
|
1103 |
|
|
|
1104 |
|
|
|
1105 |
/*
|
|
|
1106 |
SET ALL CLASS MEMBERS
|
|
|
1107 |
|
|
|
1108 |
This routine calls set_variable for each of the class members in the
|
|
|
1109 |
current variable list.
|
|
|
1110 |
*/
|
|
|
1111 |
|
|
|
1112 |
static void set_members
|
|
|
1113 |
PROTO_N ( ( use ) )
|
|
|
1114 |
PROTO_T ( VAR_INFO use )
|
|
|
1115 |
{
|
|
|
1116 |
if ( !( use & va_unreached ) ) {
|
|
|
1117 |
VAR_LIST va = crt_flow_mems ;
|
|
|
1118 |
while ( !IS_NULL_list ( va ) ) {
|
|
|
1119 |
IDENTIFIER id = DEREF_id ( var_id ( HEAD_list ( va ) ) ) ;
|
|
|
1120 |
set_variable ( id, use ) ;
|
|
|
1121 |
va = TAIL_list ( va ) ;
|
|
|
1122 |
}
|
|
|
1123 |
}
|
|
|
1124 |
return ;
|
|
|
1125 |
}
|
|
|
1126 |
|
|
|
1127 |
|
|
|
1128 |
/*
|
|
|
1129 |
MERGE A VARIABLE SETTING
|
|
|
1130 |
|
|
|
1131 |
This routine merges the variable analysis settings given by dp and dq.
|
|
|
1132 |
u indicates whether the variable set values are to be taken from dp,
|
|
|
1133 |
from dq, from both, or from neither.
|
|
|
1134 |
*/
|
|
|
1135 |
|
|
|
1136 |
static VAR_INFO merge_usage
|
|
|
1137 |
PROTO_N ( ( dp, dq, u ) )
|
|
|
1138 |
PROTO_T ( VAR_INFO dp X VAR_INFO dq X int u )
|
|
|
1139 |
{
|
|
|
1140 |
VAR_INFO ds = ( dp | dq ) ;
|
|
|
1141 |
VAR_INFO dt = dspec_none ;
|
|
|
1142 |
switch ( u ) {
|
|
|
1143 |
case 0 : dt = ( dp & dq ) ; break ;
|
|
|
1144 |
case 1 : dt = dp ; break ;
|
|
|
1145 |
case 2 : dt = dq ; break ;
|
|
|
1146 |
}
|
|
|
1147 |
ds = ( ( ds & ~va_filter ) | ( dt & va_filter ) ) ;
|
|
|
1148 |
return ( ds ) ;
|
|
|
1149 |
}
|
|
|
1150 |
|
|
|
1151 |
|
|
|
1152 |
/*
|
|
|
1153 |
SEARCH A LIST OF VARIABLES
|
|
|
1154 |
|
|
|
1155 |
This routine searches the list of variables p for one corresponding to
|
|
|
1156 |
id. q is a member of p which corresponds to id is the simplest case.
|
|
|
1157 |
It returns a pointer to the variable if it exists and a null pointer
|
|
|
1158 |
otherwise.
|
|
|
1159 |
*/
|
|
|
1160 |
|
|
|
1161 |
static PTR ( VARIABLE ) search_vars
|
|
|
1162 |
PROTO_N ( ( p, q, id ) )
|
|
|
1163 |
PROTO_T ( VAR_LIST p X VAR_LIST q X IDENTIFIER id )
|
|
|
1164 |
{
|
|
|
1165 |
if ( !IS_NULL_list ( q ) ) {
|
|
|
1166 |
PTR ( VARIABLE ) ptr = HEAD_list ( q ) ;
|
|
|
1167 |
IDENTIFIER pid = DEREF_id ( var_id ( ptr ) ) ;
|
|
|
1168 |
if ( EQ_id ( pid, id ) ) return ( ptr ) ;
|
|
|
1169 |
}
|
|
|
1170 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
1171 |
PTR ( VARIABLE ) ptr = HEAD_list ( p ) ;
|
|
|
1172 |
IDENTIFIER pid = DEREF_id ( var_id ( ptr ) ) ;
|
|
|
1173 |
if ( EQ_id ( pid, id ) ) return ( ptr ) ;
|
|
|
1174 |
p = TAIL_list ( p ) ;
|
|
|
1175 |
}
|
|
|
1176 |
return ( NULL_ptr ( VARIABLE ) ) ;
|
|
|
1177 |
}
|
|
|
1178 |
|
|
|
1179 |
|
|
|
1180 |
/*
|
|
|
1181 |
SAVE CURRENT VARIABLE SETTINGS
|
|
|
1182 |
|
|
|
1183 |
This routine saves the current variable settings by merging them with
|
|
|
1184 |
those stored in the list va.
|
|
|
1185 |
*/
|
|
|
1186 |
|
|
|
1187 |
static VAR_LIST save_vars
|
|
|
1188 |
PROTO_N ( ( va, cond ) )
|
|
|
1189 |
PROTO_T ( VAR_LIST va X int cond )
|
|
|
1190 |
{
|
|
|
1191 |
VAR_LIST vb = crt_flow_vars ;
|
|
|
1192 |
VAR_LIST vc = va ;
|
|
|
1193 |
VAR_LIST vd = va ;
|
|
|
1194 |
while ( !IS_NULL_list ( vb ) ) {
|
|
|
1195 |
VARIABLE var ;
|
|
|
1196 |
PTR ( VARIABLE ) pvar ;
|
|
|
1197 |
var.id = DEREF_id ( var_id ( HEAD_list ( vb ) ) ) ;
|
|
|
1198 |
var.info = DEREF_dspec ( id_storage ( var.id ) ) ;
|
|
|
1199 |
if ( cond ) {
|
|
|
1200 |
var.info |= va_used_this ;
|
|
|
1201 |
COPY_dspec ( id_storage ( var.id ), var.info ) ;
|
|
|
1202 |
}
|
|
|
1203 |
pvar = search_vars ( vc, vd, var.id ) ;
|
|
|
1204 |
if ( IS_NULL_ptr ( pvar ) ) {
|
|
|
1205 |
/* Add new identifier to list */
|
|
|
1206 |
CONS_var ( var, va, va ) ;
|
|
|
1207 |
} else {
|
|
|
1208 |
/* Merge with existing information */
|
|
|
1209 |
VAR_INFO acc = DEREF_dspec ( var_info ( pvar ) ) ;
|
|
|
1210 |
acc = merge_usage ( acc, var.info, 0 ) ;
|
|
|
1211 |
COPY_dspec ( var_info ( pvar ), acc ) ;
|
|
|
1212 |
}
|
|
|
1213 |
if ( !IS_NULL_list ( vd ) ) vd = TAIL_list ( vd ) ;
|
|
|
1214 |
vb = TAIL_list ( vb ) ;
|
|
|
1215 |
}
|
|
|
1216 |
if ( IS_NULL_list ( vc ) ) va = REVERSE_list ( va ) ;
|
|
|
1217 |
return ( va ) ;
|
|
|
1218 |
}
|
|
|
1219 |
|
|
|
1220 |
|
|
|
1221 |
/*
|
|
|
1222 |
LOAD CURRENT VARIABLE SETTINGS
|
|
|
1223 |
|
|
|
1224 |
This routine loads the current variable settings by merging them with
|
|
|
1225 |
those stored in the list va.
|
|
|
1226 |
*/
|
|
|
1227 |
|
|
|
1228 |
static void load_vars
|
|
|
1229 |
PROTO_N ( ( va, u ) )
|
|
|
1230 |
PROTO_T ( VAR_LIST va X int u )
|
|
|
1231 |
{
|
|
|
1232 |
VAR_LIST vb = crt_flow_vars ;
|
|
|
1233 |
VAR_LIST vc = va ;
|
|
|
1234 |
while ( !IS_NULL_list ( vb ) ) {
|
|
|
1235 |
IDENTIFIER id = DEREF_id ( var_id ( HEAD_list ( vb ) ) ) ;
|
|
|
1236 |
VAR_INFO acc = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1237 |
PTR ( VARIABLE ) pvar = search_vars ( va, vc, id ) ;
|
|
|
1238 |
if ( !IS_NULL_ptr ( pvar ) ) {
|
|
|
1239 |
VAR_INFO pacc = DEREF_dspec ( var_info ( pvar ) ) ;
|
|
|
1240 |
acc = merge_usage ( acc, pacc, u ) ;
|
|
|
1241 |
}
|
|
|
1242 |
COPY_dspec ( id_storage ( id ), acc ) ;
|
|
|
1243 |
if ( !IS_NULL_list ( vc ) ) vc = TAIL_list ( vc ) ;
|
|
|
1244 |
vb = TAIL_list ( vb ) ;
|
|
|
1245 |
}
|
|
|
1246 |
return ;
|
|
|
1247 |
}
|
|
|
1248 |
|
|
|
1249 |
|
|
|
1250 |
/*
|
|
|
1251 |
SWAP CURRENT VARIABLE SETTINGS
|
|
|
1252 |
|
|
|
1253 |
This routine swaps the current variable settings with those stored in
|
|
|
1254 |
the list va.
|
|
|
1255 |
*/
|
|
|
1256 |
|
|
|
1257 |
static void swap_vars
|
|
|
1258 |
PROTO_N ( ( va ) )
|
|
|
1259 |
PROTO_T ( VAR_LIST va )
|
|
|
1260 |
{
|
|
|
1261 |
while ( !IS_NULL_list ( va ) ) {
|
|
|
1262 |
VARIABLE var ;
|
|
|
1263 |
VAR_INFO acc ;
|
|
|
1264 |
DEREF_var ( HEAD_list ( va ), var ) ;
|
|
|
1265 |
acc = DEREF_dspec ( id_storage ( var.id ) ) ;
|
|
|
1266 |
COPY_dspec ( var_info ( HEAD_list ( va ) ), acc ) ;
|
|
|
1267 |
COPY_dspec ( id_storage ( var.id ), var.info ) ;
|
|
|
1268 |
va = TAIL_list ( va ) ;
|
|
|
1269 |
}
|
|
|
1270 |
return ;
|
|
|
1271 |
}
|
|
|
1272 |
|
|
|
1273 |
|
|
|
1274 |
/*
|
|
|
1275 |
MARK VARIABLE SETTINGS
|
|
|
1276 |
|
|
|
1277 |
This routine marks all the variables in the list va with use.
|
|
|
1278 |
*/
|
|
|
1279 |
|
|
|
1280 |
static void mark_vars
|
|
|
1281 |
PROTO_N ( ( va, use ) )
|
|
|
1282 |
PROTO_T ( VAR_LIST va X VAR_INFO use )
|
|
|
1283 |
{
|
|
|
1284 |
while ( !IS_NULL_list ( va ) ) {
|
|
|
1285 |
IDENTIFIER id = DEREF_id ( var_id ( HEAD_list ( va ) ) ) ;
|
|
|
1286 |
VAR_INFO acc = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1287 |
acc |= use ;
|
|
|
1288 |
COPY_dspec ( id_storage ( id ), acc ) ;
|
|
|
1289 |
va = TAIL_list ( va ) ;
|
|
|
1290 |
}
|
|
|
1291 |
return ;
|
|
|
1292 |
}
|
|
|
1293 |
|
|
|
1294 |
|
|
|
1295 |
/*
|
|
|
1296 |
PERFORM FLOW ANALYSIS ON A GOTO STATEMENT
|
|
|
1297 |
|
|
|
1298 |
This routine performs flow analysis on a jump to the label lab. cond
|
|
|
1299 |
is true to indicate a conditional jump.
|
|
|
1300 |
*/
|
|
|
1301 |
|
|
|
1302 |
static VAR_INFO flow_goto_stmt
|
|
|
1303 |
PROTO_N ( ( lab, use, cond ) )
|
|
|
1304 |
PROTO_T ( IDENTIFIER lab X VAR_INFO use X int cond )
|
|
|
1305 |
{
|
|
|
1306 |
if ( !( use & va_unreached ) ) {
|
|
|
1307 |
VAR_INFO ds = DEREF_dspec ( id_storage ( lab ) ) ;
|
|
|
1308 |
if ( ds & dspec_reserve ) {
|
|
|
1309 |
/* Has backward jump */
|
|
|
1310 |
mark_vars ( crt_flow_vars, va_used_this ) ;
|
|
|
1311 |
} else {
|
|
|
1312 |
/* Only forward jumps */
|
|
|
1313 |
VAR_LIST va = DEREF_list ( id_label_vars ( lab ) ) ;
|
|
|
1314 |
va = save_vars ( va, cond ) ;
|
|
|
1315 |
COPY_list ( id_label_vars ( lab ), va ) ;
|
|
|
1316 |
}
|
|
|
1317 |
ds |= dspec_temp ;
|
|
|
1318 |
COPY_dspec ( id_storage ( lab ), ds ) ;
|
|
|
1319 |
use |= va_unreached ;
|
|
|
1320 |
}
|
|
|
1321 |
return ( use ) ;
|
|
|
1322 |
}
|
|
|
1323 |
|
|
|
1324 |
|
|
|
1325 |
/*
|
|
|
1326 |
PERFORM FLOW ANALYSIS ON A LABELLED STATEMENT
|
|
|
1327 |
|
|
|
1328 |
This routine performs flow analysis on the statement labelled by the
|
|
|
1329 |
label lab.
|
|
|
1330 |
*/
|
|
|
1331 |
|
|
|
1332 |
static VAR_INFO flow_label_stmt
|
|
|
1333 |
PROTO_N ( ( lab, use, flow ) )
|
|
|
1334 |
PROTO_T ( IDENTIFIER lab X VAR_INFO use X int flow )
|
|
|
1335 |
{
|
|
|
1336 |
EXP e = DEREF_exp ( id_label_stmt ( lab ) ) ;
|
|
|
1337 |
VAR_INFO ds = DEREF_dspec ( id_storage ( lab ) ) ;
|
|
|
1338 |
if ( ds & dspec_reserve ) {
|
|
|
1339 |
/* Has backward jump */
|
|
|
1340 |
mark_vars ( crt_flow_vars, ( va_maybe_set | va_used_this ) ) ;
|
|
|
1341 |
use &= ~va_unreached ;
|
|
|
1342 |
} else {
|
|
|
1343 |
/* Only forward jumps */
|
|
|
1344 |
int unreached = 0 ;
|
|
|
1345 |
VAR_LIST va = DEREF_list ( id_label_vars ( lab ) ) ;
|
|
|
1346 |
if ( use & va_unreached ) unreached = 2 ;
|
|
|
1347 |
load_vars ( va, unreached ) ;
|
|
|
1348 |
DESTROY_list ( va, SIZE_var ) ;
|
|
|
1349 |
COPY_list ( id_label_vars ( lab ), NULL_list ( VARIABLE ) ) ;
|
|
|
1350 |
if ( ds & dspec_temp ) use &= ~va_unreached ;
|
|
|
1351 |
}
|
|
|
1352 |
if ( !IS_NULL_exp ( e ) ) {
|
|
|
1353 |
e = DEREF_exp ( exp_label_stmt_body ( e ) ) ;
|
|
|
1354 |
use = flow_stmt ( e, use, flow ) ;
|
|
|
1355 |
}
|
|
|
1356 |
return ( use ) ;
|
|
|
1357 |
}
|
|
|
1358 |
|
|
|
1359 |
|
|
|
1360 |
/*
|
|
|
1361 |
CHECK A SEQUENCE POINT
|
|
|
1362 |
|
|
|
1363 |
This routine is called at each sequence point in the flow analysis
|
|
|
1364 |
routines. It clears the list of identifiers assigned since the last
|
|
|
1365 |
sequence point.
|
|
|
1366 |
*/
|
|
|
1367 |
|
|
|
1368 |
static void flow_sequence_point
|
|
|
1369 |
PROTO_Z ()
|
|
|
1370 |
{
|
|
|
1371 |
LIST ( IDENTIFIER ) p = crt_flow_assign ;
|
|
|
1372 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
1373 |
VAR_INFO ds ;
|
|
|
1374 |
IDENTIFIER id ;
|
|
|
1375 |
DESTROY_CONS_id ( destroy, id, p, p ) ;
|
|
|
1376 |
ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1377 |
ds &= ~va_assign ;
|
|
|
1378 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
1379 |
}
|
|
|
1380 |
crt_flow_assign = NULL_list ( IDENTIFIER ) ;
|
|
|
1381 |
return ;
|
|
|
1382 |
}
|
|
|
1383 |
|
|
|
1384 |
|
|
|
1385 |
/*
|
|
|
1386 |
PERFORM FLOW ANALYSIS ON AN UNREACHABLE STATEMENT
|
|
|
1387 |
|
|
|
1388 |
This routine performs flow analysis following a return statement (in
|
|
|
1389 |
which case ret is true) or other expression which causes execution to
|
|
|
1390 |
cease.
|
|
|
1391 |
*/
|
|
|
1392 |
|
|
|
1393 |
static VAR_INFO flow_terminate
|
|
|
1394 |
PROTO_N ( ( use, ret ) )
|
|
|
1395 |
PROTO_T ( VAR_INFO use X int ret )
|
|
|
1396 |
{
|
|
|
1397 |
if ( !( use & va_unreached ) ) {
|
|
|
1398 |
VAR_LIST va = crt_flow_vars ;
|
|
|
1399 |
while ( !IS_NULL_list ( va ) ) {
|
|
|
1400 |
IDENTIFIER id = DEREF_id ( var_id ( HEAD_list ( va ) ) ) ;
|
|
|
1401 |
VAR_INFO ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1402 |
ds = end_usage ( id, ds, ret ) ;
|
|
|
1403 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
1404 |
va = TAIL_list ( va ) ;
|
|
|
1405 |
}
|
|
|
1406 |
}
|
|
|
1407 |
UNUSED ( ret ) ;
|
|
|
1408 |
use |= va_unreached ;
|
|
|
1409 |
return ( use ) ;
|
|
|
1410 |
}
|
|
|
1411 |
|
|
|
1412 |
|
|
|
1413 |
/*
|
|
|
1414 |
PERFORM FLOW ANALYSIS ON AN IF EXPRESSION
|
|
|
1415 |
|
|
|
1416 |
This routine preforms flow analysis on the if expression with condition
|
|
|
1417 |
c and branches a and b.
|
|
|
1418 |
*/
|
|
|
1419 |
|
|
|
1420 |
static VAR_INFO flow_if_exp
|
|
|
1421 |
PROTO_N ( ( c, a, b, use, flow ) )
|
|
|
1422 |
PROTO_T ( EXP c X EXP a X EXP b X VAR_INFO use X int flow )
|
|
|
1423 |
{
|
|
|
1424 |
VAR_LIST va ;
|
|
|
1425 |
VAR_INFO ua, ub ;
|
|
|
1426 |
int unreached = 0 ;
|
|
|
1427 |
unsigned cv = eval_const_cond ( c ) ;
|
|
|
1428 |
if ( flow ) {
|
|
|
1429 |
/* Condition */
|
|
|
1430 |
use = flow_exp ( c, use ) ;
|
|
|
1431 |
flow_sequence_point () ;
|
|
|
1432 |
}
|
|
|
1433 |
ua = use ;
|
|
|
1434 |
ub = use ;
|
|
|
1435 |
if ( cv == BOOL_FALSE ) ua |= va_unreached ;
|
|
|
1436 |
if ( cv == BOOL_TRUE ) ub |= va_unreached ;
|
|
|
1437 |
va = save_vars ( NULL_list ( VARIABLE ), 1 ) ;
|
|
|
1438 |
ua = flow_stmt ( a, ua, flow ) ;
|
|
|
1439 |
swap_vars ( va ) ;
|
|
|
1440 |
ub = flow_stmt ( b, ub, flow ) ;
|
|
|
1441 |
if ( ua & va_unreached ) unreached |= 1 ;
|
|
|
1442 |
if ( ub & va_unreached ) unreached |= 2 ;
|
|
|
1443 |
load_vars ( va, unreached ) ;
|
|
|
1444 |
DESTROY_list ( va, SIZE_var ) ;
|
|
|
1445 |
use = ( ua & ub ) ;
|
|
|
1446 |
return ( use ) ;
|
|
|
1447 |
}
|
|
|
1448 |
|
|
|
1449 |
|
|
|
1450 |
/*
|
|
|
1451 |
PROCESS A FLOW ANALYSIS DIRECTIVE
|
|
|
1452 |
|
|
|
1453 |
This routine processes the flow analysis directive indicated by act
|
|
|
1454 |
to the expression e.
|
|
|
1455 |
*/
|
|
|
1456 |
|
|
|
1457 |
static VAR_INFO flow_set
|
|
|
1458 |
PROTO_N ( ( e, use, act ) )
|
|
|
1459 |
PROTO_T ( EXP e X VAR_INFO use X VAR_INFO act )
|
|
|
1460 |
{
|
|
|
1461 |
if ( !( use & va_unreached ) && !IS_NULL_exp ( e ) ) {
|
|
|
1462 |
EXP a = NULL_exp ;
|
|
|
1463 |
if ( IS_exp_contents ( e ) ) {
|
|
|
1464 |
/* Check for simple lvalues */
|
|
|
1465 |
a = DEREF_exp ( exp_contents_ptr ( e ) ) ;
|
|
|
1466 |
} else if ( IS_exp_address ( e ) ) {
|
|
|
1467 |
/* Check for array to pointer conversions */
|
|
|
1468 |
EXP b = DEREF_exp ( exp_address_arg ( e ) ) ;
|
|
|
1469 |
TYPE s = DEREF_type ( exp_type ( b ) ) ;
|
|
|
1470 |
if ( IS_type_array ( s ) ) a = b ;
|
|
|
1471 |
}
|
|
|
1472 |
if ( !IS_NULL_exp ( a ) && IS_exp_identifier ( a ) ) {
|
|
|
1473 |
IDENTIFIER id = DEREF_id ( exp_identifier_id ( a ) ) ;
|
|
|
1474 |
if ( IS_id_variable_etc ( id ) ) {
|
|
|
1475 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1476 |
if ( ds & dspec_auto ) {
|
|
|
1477 |
if ( act & va_set ) {
|
|
|
1478 |
/* Set variable */
|
|
|
1479 |
ds |= ( va_set | va_maybe_set | va_any_set ) ;
|
|
|
1480 |
ds &= ~va_used_this ;
|
|
|
1481 |
} else {
|
|
|
1482 |
/* Unused variable */
|
|
|
1483 |
set_variable ( id, act ) ;
|
|
|
1484 |
ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1485 |
ds &= ~( va_set | va_maybe_set ) ;
|
|
|
1486 |
}
|
|
|
1487 |
COPY_dspec ( id_storage ( id ), ds ) ;
|
|
|
1488 |
}
|
|
|
1489 |
}
|
|
|
1490 |
}
|
|
|
1491 |
}
|
|
|
1492 |
return ( use ) ;
|
|
|
1493 |
}
|
|
|
1494 |
|
|
|
1495 |
|
|
|
1496 |
/*
|
|
|
1497 |
PERFORM FLOW ANALYSIS ON A LIST OF TOKEN ARGUMENTS
|
|
|
1498 |
|
|
|
1499 |
This routine performs flow analysis on the list of token arguments p.
|
|
|
1500 |
*/
|
|
|
1501 |
|
|
|
1502 |
static VAR_INFO flow_token_list
|
|
|
1503 |
PROTO_N ( ( p, use ) )
|
|
|
1504 |
PROTO_T ( LIST ( TOKEN ) p X VAR_INFO use )
|
|
|
1505 |
{
|
|
|
1506 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
1507 |
TOKEN tok = DEREF_tok ( HEAD_list ( p ) ) ;
|
|
|
1508 |
if ( !IS_NULL_tok ( tok ) ) {
|
|
|
1509 |
switch ( TAG_tok ( tok ) ) {
|
|
|
1510 |
case tok_exp_tag : {
|
|
|
1511 |
/* Expression tokens */
|
|
|
1512 |
EXP e = DEREF_exp ( tok_exp_value ( tok ) ) ;
|
|
|
1513 |
use = flow_alias_exp ( e, use ) ;
|
|
|
1514 |
break ;
|
|
|
1515 |
}
|
|
|
1516 |
case tok_stmt_tag : {
|
|
|
1517 |
/* Statement tokens */
|
|
|
1518 |
EXP e = DEREF_exp ( tok_stmt_value ( tok ) ) ;
|
|
|
1519 |
use = flow_stmt ( e, use, 1 ) ;
|
|
|
1520 |
break ;
|
|
|
1521 |
}
|
|
|
1522 |
case tok_member_tag : {
|
|
|
1523 |
/* Member tokens */
|
|
|
1524 |
OFFSET off = DEREF_off ( tok_member_value ( tok ) ) ;
|
|
|
1525 |
use = flow_offset ( off, use, 0 ) ;
|
|
|
1526 |
break ;
|
|
|
1527 |
}
|
|
|
1528 |
}
|
|
|
1529 |
}
|
|
|
1530 |
p = TAIL_list ( p ) ;
|
|
|
1531 |
}
|
|
|
1532 |
return ( use ) ;
|
|
|
1533 |
}
|
|
|
1534 |
|
|
|
1535 |
|
|
|
1536 |
/*
|
|
|
1537 |
PERFORM FLOW ANALYSIS ON AN OFFSET
|
|
|
1538 |
|
|
|
1539 |
This routine performs flow analysis on the offset off. mem is true
|
|
|
1540 |
in member functions when the offset is being added to 'this'.
|
|
|
1541 |
*/
|
|
|
1542 |
|
|
|
1543 |
static VAR_INFO flow_offset
|
|
|
1544 |
PROTO_N ( ( off, use, mem ) )
|
|
|
1545 |
PROTO_T ( OFFSET off X VAR_INFO use X int mem )
|
|
|
1546 |
{
|
|
|
1547 |
DECL_SPEC ua = ( use & ~va_mask ) ;
|
|
|
1548 |
if ( IS_NULL_off ( off ) ) return ( ua ) ;
|
|
|
1549 |
ASSERT ( ORDER_off == 13 ) ;
|
|
|
1550 |
switch ( TAG_off ( off ) ) {
|
|
|
1551 |
|
|
|
1552 |
case off_member_tag : {
|
|
|
1553 |
/* Member offsets */
|
|
|
1554 |
if ( mem ) {
|
|
|
1555 |
IDENTIFIER id = DEREF_id ( off_member_id ( off ) ) ;
|
|
|
1556 |
VAR_INFO ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1557 |
if ( ds & va_variable ) set_variable ( id, use ) ;
|
|
|
1558 |
}
|
|
|
1559 |
break ;
|
|
|
1560 |
}
|
|
|
1561 |
|
|
|
1562 |
case off_ptr_mem_tag : {
|
|
|
1563 |
/* Pointer to member offsets */
|
|
|
1564 |
EXP a = DEREF_exp ( off_ptr_mem_arg ( off ) ) ;
|
|
|
1565 |
ua = flow_exp ( a, ua ) ;
|
|
|
1566 |
break ;
|
|
|
1567 |
}
|
|
|
1568 |
|
|
|
1569 |
case off_negate_tag : {
|
|
|
1570 |
/* Negated offsets */
|
|
|
1571 |
OFFSET off1 = DEREF_off ( off_negate_arg ( off ) ) ;
|
|
|
1572 |
ua = flow_offset ( off1, ua, 0 ) ;
|
|
|
1573 |
break ;
|
|
|
1574 |
}
|
|
|
1575 |
|
|
|
1576 |
case off_plus_tag : {
|
|
|
1577 |
/* Offset addition */
|
|
|
1578 |
OFFSET off1 = DEREF_off ( off_plus_arg1 ( off ) ) ;
|
|
|
1579 |
OFFSET off2 = DEREF_off ( off_plus_arg2 ( off ) ) ;
|
|
|
1580 |
ua = flow_offset ( off1, ua, 0 ) ;
|
|
|
1581 |
ua = flow_offset ( off2, ua, 0 ) ;
|
|
|
1582 |
break ;
|
|
|
1583 |
}
|
|
|
1584 |
|
|
|
1585 |
case off_mult_tag : {
|
|
|
1586 |
/* Offset multiplication */
|
|
|
1587 |
OFFSET off1 = DEREF_off ( off_mult_arg1 ( off ) ) ;
|
|
|
1588 |
EXP a = DEREF_exp ( off_mult_arg2 ( off ) ) ;
|
|
|
1589 |
ua = flow_offset ( off1, ua, 0 ) ;
|
|
|
1590 |
ua = flow_exp ( a, ua ) ;
|
|
|
1591 |
break ;
|
|
|
1592 |
}
|
|
|
1593 |
|
|
|
1594 |
case off_ptr_diff_tag : {
|
|
|
1595 |
/* Difference of two pointers */
|
|
|
1596 |
EXP a = DEREF_exp ( off_ptr_diff_ptr1 ( off ) ) ;
|
|
|
1597 |
EXP b = DEREF_exp ( off_ptr_diff_ptr2 ( off ) ) ;
|
|
|
1598 |
ua = flow_exp ( a, ua ) ;
|
|
|
1599 |
ua = flow_exp ( b, ua ) ;
|
|
|
1600 |
break ;
|
|
|
1601 |
}
|
|
|
1602 |
|
|
|
1603 |
case off_token_tag : {
|
|
|
1604 |
/* Tokenised offsets */
|
|
|
1605 |
LIST ( TOKEN ) args = DEREF_list ( off_token_args ( off ) ) ;
|
|
|
1606 |
ua = flow_token_list ( args, ua ) ;
|
|
|
1607 |
break ;
|
|
|
1608 |
}
|
|
|
1609 |
}
|
|
|
1610 |
ua &= ~va_mask ;
|
|
|
1611 |
return ( ua ) ;
|
|
|
1612 |
}
|
|
|
1613 |
|
|
|
1614 |
|
|
|
1615 |
/*
|
|
|
1616 |
PERFORM FLOW ANALYSIS ON A LIST OF EXPRESSIONS
|
|
|
1617 |
|
|
|
1618 |
This routine performs flow analysis on the list of expressions p.
|
|
|
1619 |
*/
|
|
|
1620 |
|
|
|
1621 |
static VAR_INFO flow_exp_list
|
|
|
1622 |
PROTO_N ( ( p, use, fn ) )
|
|
|
1623 |
PROTO_T ( LIST ( EXP ) p X VAR_INFO use X int fn )
|
|
|
1624 |
{
|
|
|
1625 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
1626 |
EXP a = DEREF_exp ( HEAD_list ( p ) ) ;
|
|
|
1627 |
if ( !IS_NULL_exp ( a ) ) {
|
|
|
1628 |
VAR_INFO ua ;
|
|
|
1629 |
if ( fn ) {
|
|
|
1630 |
ua = flow_alias_exp ( a, use ) ;
|
|
|
1631 |
} else {
|
|
|
1632 |
ua = flow_exp ( a, use ) ;
|
|
|
1633 |
}
|
|
|
1634 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1635 |
}
|
|
|
1636 |
p = TAIL_list ( p ) ;
|
|
|
1637 |
}
|
|
|
1638 |
return ( use ) ;
|
|
|
1639 |
}
|
|
|
1640 |
|
|
|
1641 |
|
|
|
1642 |
/*
|
|
|
1643 |
PERFORM FLOW ANALYSIS ON AN ALIASED EXPRESSION
|
|
|
1644 |
|
|
|
1645 |
This routine performs flow analysis on the expression e which may be
|
|
|
1646 |
aliased by being on the right hand side of an assignment. Note that
|
|
|
1647 |
there are read-only and read-write aliases, depending on whether the
|
|
|
1648 |
access is through a pointer or reference to const or not.
|
|
|
1649 |
*/
|
|
|
1650 |
|
|
|
1651 |
static VAR_INFO flow_alias_exp
|
|
|
1652 |
PROTO_N ( ( e, use ) )
|
|
|
1653 |
PROTO_T ( EXP e X VAR_INFO use )
|
|
|
1654 |
{
|
|
|
1655 |
VAR_INFO ua = ( use | va_alias_used ) ;
|
|
|
1656 |
if ( !IS_NULL_exp ( e ) ) {
|
|
|
1657 |
TYPE t = DEREF_type ( exp_type ( e ) ) ;
|
|
|
1658 |
CV_SPEC cv = find_cv_qual ( t ) ;
|
|
|
1659 |
if ( cv & cv_lvalue ) {
|
|
|
1660 |
/* Aliased via lvalue */
|
|
|
1661 |
if ( !( cv & cv_const ) ) ua |= va_alias_set ;
|
|
|
1662 |
}
|
|
|
1663 |
if ( IS_type_ptr_etc ( t ) ) {
|
|
|
1664 |
/* Aliased via pointer or reference */
|
|
|
1665 |
TYPE s = DEREF_type ( type_ptr_etc_sub ( t ) ) ;
|
|
|
1666 |
cv = find_cv_qual ( s ) ;
|
|
|
1667 |
if ( !( cv & cv_const ) ) ua |= va_alias_set ;
|
|
|
1668 |
}
|
|
|
1669 |
}
|
|
|
1670 |
ua = flow_exp ( e, ua ) ;
|
|
|
1671 |
return ( ua ) ;
|
|
|
1672 |
}
|
|
|
1673 |
|
|
|
1674 |
|
|
|
1675 |
/*
|
|
|
1676 |
PERFORM FLOW ANALYSIS ON AN EXPRESSION
|
|
|
1677 |
|
|
|
1678 |
This routine performs flow analysis on the expression e.
|
|
|
1679 |
*/
|
|
|
1680 |
|
|
|
1681 |
static VAR_INFO flow_exp
|
|
|
1682 |
PROTO_N ( ( e, use ) )
|
|
|
1683 |
PROTO_T ( EXP e X VAR_INFO use )
|
|
|
1684 |
{
|
|
|
1685 |
VAR_INFO ua = ( use & ~va_mask ) ;
|
|
|
1686 |
if ( IS_NULL_exp ( e ) ) return ( ua ) ;
|
|
|
1687 |
ASSERT ( ORDER_exp == 88 ) ;
|
|
|
1688 |
switch ( TAG_exp ( e ) ) {
|
|
|
1689 |
|
|
|
1690 |
case exp_identifier_tag : {
|
|
|
1691 |
/* Identifier expressions */
|
|
|
1692 |
IDENTIFIER id = DEREF_id ( exp_identifier_id ( e ) ) ;
|
|
|
1693 |
if ( IS_id_variable_etc ( id ) ) {
|
|
|
1694 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1695 |
if ( ds & dspec_auto ) {
|
|
|
1696 |
set_variable ( id, use ) ;
|
|
|
1697 |
if ( ( ds & va_this ) && ( use & va_alias ) ) {
|
|
|
1698 |
/* Allow for aliasing using 'this' */
|
|
|
1699 |
set_members ( use ) ;
|
|
|
1700 |
}
|
|
|
1701 |
}
|
|
|
1702 |
}
|
|
|
1703 |
break ;
|
|
|
1704 |
}
|
|
|
1705 |
|
|
|
1706 |
case exp_assign_tag : {
|
|
|
1707 |
/* Assignment expressions */
|
|
|
1708 |
EXP a = DEREF_exp ( exp_assign_ref ( e ) ) ;
|
|
|
1709 |
EXP b = DEREF_exp ( exp_assign_arg ( e ) ) ;
|
|
|
1710 |
ua = flow_alias_exp ( b, ua ) ;
|
|
|
1711 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1712 |
ua = flow_exp ( a, ( use | va_assign ) ) ;
|
|
|
1713 |
break ;
|
|
|
1714 |
}
|
|
|
1715 |
|
|
|
1716 |
case exp_init_tag : {
|
|
|
1717 |
/* Initialisation expressions */
|
|
|
1718 |
EXP a = DEREF_exp ( exp_init_arg ( e ) ) ;
|
|
|
1719 |
ua = flow_alias_exp ( a, ua ) ;
|
|
|
1720 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1721 |
if ( !IS_NULL_exp ( a ) ) {
|
|
|
1722 |
IDENTIFIER id = DEREF_id ( exp_init_id ( e ) ) ;
|
|
|
1723 |
if ( IS_id_variable ( id ) ) {
|
|
|
1724 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
1725 |
if ( ds & dspec_auto ) {
|
|
|
1726 |
/* Initialiser expression */
|
|
|
1727 |
set_variable ( id, ( use | va_assign ) ) ;
|
|
|
1728 |
break ;
|
|
|
1729 |
}
|
|
|
1730 |
}
|
|
|
1731 |
}
|
|
|
1732 |
break ;
|
|
|
1733 |
}
|
|
|
1734 |
|
|
|
1735 |
case exp_preinc_tag : {
|
|
|
1736 |
/* Pre-increment expressions */
|
|
|
1737 |
EXP a = DEREF_exp ( exp_preinc_ref ( e ) ) ;
|
|
|
1738 |
EXP b = DEREF_exp ( exp_preinc_op ( e ) ) ;
|
|
|
1739 |
EXP c = DEREF_exp ( exp_dummy_value ( a ) ) ;
|
|
|
1740 |
int op = DEREF_int ( exp_preinc_becomes ( e ) ) ;
|
|
|
1741 |
if ( op == lex_assign ) {
|
|
|
1742 |
/* Bitfield assignment */
|
|
|
1743 |
ua = flow_alias_exp ( b, ua ) ;
|
|
|
1744 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1745 |
if ( !IS_NULL_list ( crt_flow_mems ) && is_this_exp ( c ) ) {
|
|
|
1746 |
/* Have 'this->off' */
|
|
|
1747 |
OFFSET off = DEREF_off ( exp_dummy_off ( a ) ) ;
|
|
|
1748 |
ua = flow_offset ( off, ( use | va_assign ), 1 ) ;
|
|
|
1749 |
break ;
|
|
|
1750 |
}
|
|
|
1751 |
use |= va_partial ;
|
|
|
1752 |
} else {
|
|
|
1753 |
COPY_exp ( exp_dummy_value ( a ), NULL_exp ) ;
|
|
|
1754 |
ua = flow_exp ( b, ua ) ;
|
|
|
1755 |
COPY_exp ( exp_dummy_value ( a ), c ) ;
|
|
|
1756 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1757 |
use |= va_becomes ;
|
|
|
1758 |
}
|
|
|
1759 |
ua = flow_exp ( c, ( use | va_assign ) ) ;
|
|
|
1760 |
break ;
|
|
|
1761 |
}
|
|
|
1762 |
|
|
|
1763 |
case exp_postinc_tag : {
|
|
|
1764 |
/* Post-increment expressions */
|
|
|
1765 |
EXP a = DEREF_exp ( exp_postinc_ref ( e ) ) ;
|
|
|
1766 |
EXP b = DEREF_exp ( exp_postinc_op ( e ) ) ;
|
|
|
1767 |
EXP c = DEREF_exp ( exp_dummy_value ( a ) ) ;
|
|
|
1768 |
COPY_exp ( exp_dummy_value ( a ), NULL_exp ) ;
|
|
|
1769 |
ua = flow_exp ( b, ua ) ;
|
|
|
1770 |
COPY_exp ( exp_dummy_value ( a ), c ) ;
|
|
|
1771 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1772 |
ua = flow_exp ( a, ( use | va_becomes ) ) ;
|
|
|
1773 |
break ;
|
|
|
1774 |
}
|
|
|
1775 |
|
|
|
1776 |
case exp_indir_tag : {
|
|
|
1777 |
/* Indirection expressions */
|
|
|
1778 |
EXP a = DEREF_exp ( exp_indir_ptr ( e ) ) ;
|
|
|
1779 |
if ( !IS_NULL_list ( crt_flow_mems ) && is_this_exp ( e ) ) {
|
|
|
1780 |
/* Have '*this' */
|
|
|
1781 |
set_members ( use ) ;
|
|
|
1782 |
break ;
|
|
|
1783 |
}
|
|
|
1784 |
if ( IS_exp_add_ptr ( a ) ) {
|
|
|
1785 |
EXP b = DEREF_exp ( exp_add_ptr_ptr ( a ) ) ;
|
|
|
1786 |
OFFSET off = DEREF_off ( exp_add_ptr_off ( a ) ) ;
|
|
|
1787 |
if ( !IS_NULL_list ( crt_flow_mems ) && is_this_exp ( b ) ) {
|
|
|
1788 |
/* Have 'this->off' */
|
|
|
1789 |
ua = flow_offset ( off, use, 1 ) ;
|
|
|
1790 |
break ;
|
|
|
1791 |
}
|
|
|
1792 |
if ( IS_exp_address ( b ) ) {
|
|
|
1793 |
/* Have 'c.off' */
|
|
|
1794 |
EXP c = DEREF_exp ( exp_address_arg ( b ) ) ;
|
|
|
1795 |
ua = flow_offset ( off, use, 0 ) ;
|
|
|
1796 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1797 |
ua = flow_exp ( c, ( use | va_partial ) ) ;
|
|
|
1798 |
break ;
|
|
|
1799 |
}
|
|
|
1800 |
} else if ( IS_exp_address ( a ) ) {
|
|
|
1801 |
/* Have '*&b' */
|
|
|
1802 |
EXP b = DEREF_exp ( exp_address_arg ( a ) ) ;
|
|
|
1803 |
ua = flow_exp ( b, use ) ;
|
|
|
1804 |
break ;
|
|
|
1805 |
}
|
|
|
1806 |
ua = flow_exp ( a, ua ) ;
|
|
|
1807 |
break ;
|
|
|
1808 |
}
|
|
|
1809 |
|
|
|
1810 |
case exp_contents_tag : {
|
|
|
1811 |
/* Contents expressions */
|
|
|
1812 |
EXP a = DEREF_exp ( exp_contents_ptr ( e ) ) ;
|
|
|
1813 |
ua = flow_exp ( a, ua ) ;
|
|
|
1814 |
break ;
|
|
|
1815 |
}
|
|
|
1816 |
|
|
|
1817 |
case exp_address_tag : {
|
|
|
1818 |
/* Address expressions */
|
|
|
1819 |
EXP a = DEREF_exp ( exp_address_arg ( e ) ) ;
|
|
|
1820 |
if ( IS_exp_indir ( a ) && !is_this_exp ( a ) ) {
|
|
|
1821 |
EXP b = DEREF_exp ( exp_indir_ptr ( a ) ) ;
|
|
|
1822 |
TYPE t = DEREF_type ( exp_type ( b ) ) ;
|
|
|
1823 |
if ( !IS_type_ref ( t ) ) {
|
|
|
1824 |
ua = flow_exp ( b, use ) ;
|
|
|
1825 |
break ;
|
|
|
1826 |
}
|
|
|
1827 |
}
|
|
|
1828 |
ua = ( use & ~va_other ) ;
|
|
|
1829 |
ua = flow_exp ( a, ( ua | va_address ) ) ;
|
|
|
1830 |
break ;
|
|
|
1831 |
}
|
|
|
1832 |
|
|
|
1833 |
case exp_address_mem_tag : {
|
|
|
1834 |
/* Member address expressions */
|
|
|
1835 |
EXP a = DEREF_exp ( exp_address_mem_arg ( e ) ) ;
|
|
|
1836 |
ua = flow_exp ( a, ua ) ;
|
|
|
1837 |
break ;
|
|
|
1838 |
}
|
|
|
1839 |
|
|
|
1840 |
case exp_func_tag : {
|
|
|
1841 |
/* Function expressions */
|
|
|
1842 |
TYPE t = DEREF_type ( exp_type ( e ) ) ;
|
|
|
1843 |
EXP a = DEREF_exp ( exp_func_fn ( e ) ) ;
|
|
|
1844 |
LIST ( EXP ) args = DEREF_list ( exp_func_args ( e ) ) ;
|
|
|
1845 |
ua = flow_exp ( a, ua ) ;
|
|
|
1846 |
ua = flow_exp_list ( args, ua, 1 ) ;
|
|
|
1847 |
if ( IS_type_bottom ( t ) ) {
|
|
|
1848 |
/* Deal with functions like exit */
|
|
|
1849 |
ua = flow_terminate ( ua, 1 ) ;
|
|
|
1850 |
}
|
|
|
1851 |
break ;
|
|
|
1852 |
}
|
|
|
1853 |
|
|
|
1854 |
case exp_func_id_tag : {
|
|
|
1855 |
/* Function expressions */
|
|
|
1856 |
TYPE t = DEREF_type ( exp_type ( e ) ) ;
|
|
|
1857 |
LIST ( EXP ) args = DEREF_list ( exp_func_id_args ( e ) ) ;
|
|
|
1858 |
ua = flow_exp_list ( args, ua, 1 ) ;
|
|
|
1859 |
if ( IS_type_bottom ( t ) ) {
|
|
|
1860 |
/* Deal with functions like exit */
|
|
|
1861 |
ua = flow_terminate ( ua, 1 ) ;
|
|
|
1862 |
}
|
|
|
1863 |
break ;
|
|
|
1864 |
}
|
|
|
1865 |
|
|
|
1866 |
case exp_call_tag : {
|
|
|
1867 |
/* Pointer to member function expressions */
|
|
|
1868 |
EXP a = DEREF_exp ( exp_call_ptr ( e ) ) ;
|
|
|
1869 |
EXP b = DEREF_exp ( exp_call_arg ( e ) ) ;
|
|
|
1870 |
ua = flow_exp ( a, ua ) ;
|
|
|
1871 |
ua = flow_exp ( b, ua ) ;
|
|
|
1872 |
break ;
|
|
|
1873 |
}
|
|
|
1874 |
|
|
|
1875 |
case exp_negate_tag :
|
|
|
1876 |
case exp_compl_tag :
|
|
|
1877 |
case exp_not_tag :
|
|
|
1878 |
case exp_abs_tag : {
|
|
|
1879 |
/* Unary expressions */
|
|
|
1880 |
EXP a = DEREF_exp ( exp_negate_etc_arg ( e ) ) ;
|
|
|
1881 |
ua = flow_exp ( a, ua ) ;
|
|
|
1882 |
break ;
|
|
|
1883 |
}
|
|
|
1884 |
|
|
|
1885 |
case exp_plus_tag :
|
|
|
1886 |
case exp_minus_tag :
|
|
|
1887 |
case exp_mult_tag :
|
|
|
1888 |
case exp_div_tag :
|
|
|
1889 |
case exp_rem_tag :
|
|
|
1890 |
case exp_and_tag :
|
|
|
1891 |
case exp_or_tag :
|
|
|
1892 |
case exp_xor_tag :
|
|
|
1893 |
case exp_lshift_tag :
|
|
|
1894 |
case exp_rshift_tag :
|
|
|
1895 |
case exp_max_tag :
|
|
|
1896 |
case exp_min_tag : {
|
|
|
1897 |
/* Binary expressions */
|
|
|
1898 |
EXP a = DEREF_exp ( exp_plus_etc_arg1 ( e ) ) ;
|
|
|
1899 |
EXP b = DEREF_exp ( exp_plus_etc_arg2 ( e ) ) ;
|
|
|
1900 |
ua = flow_exp ( a, ua ) ;
|
|
|
1901 |
ua = flow_exp ( b, ua ) ;
|
|
|
1902 |
break ;
|
|
|
1903 |
}
|
|
|
1904 |
|
|
|
1905 |
case exp_log_and_tag :
|
|
|
1906 |
case exp_log_or_tag : {
|
|
|
1907 |
/* Logical expressions */
|
|
|
1908 |
EXP a = DEREF_exp ( exp_plus_etc_arg1 ( e ) ) ;
|
|
|
1909 |
EXP b = DEREF_exp ( exp_plus_etc_arg2 ( e ) ) ;
|
|
|
1910 |
ua = flow_exp ( a, ua ) ;
|
|
|
1911 |
flow_sequence_point () ;
|
|
|
1912 |
ua = flow_exp ( b, ua ) ;
|
|
|
1913 |
break ;
|
|
|
1914 |
}
|
|
|
1915 |
|
|
|
1916 |
case exp_test_tag : {
|
|
|
1917 |
/* Test expressions */
|
|
|
1918 |
EXP a = DEREF_exp ( exp_test_arg ( e ) ) ;
|
|
|
1919 |
ua = flow_exp ( a, ua ) ;
|
|
|
1920 |
break ;
|
|
|
1921 |
}
|
|
|
1922 |
|
|
|
1923 |
case exp_compare_tag : {
|
|
|
1924 |
/* Comparison expressions */
|
|
|
1925 |
EXP a = DEREF_exp ( exp_compare_arg1 ( e ) ) ;
|
|
|
1926 |
EXP b = DEREF_exp ( exp_compare_arg2 ( e ) ) ;
|
|
|
1927 |
ua = flow_exp ( a, ua ) ;
|
|
|
1928 |
ua = flow_exp ( b, ua ) ;
|
|
|
1929 |
break ;
|
|
|
1930 |
}
|
|
|
1931 |
|
|
|
1932 |
case exp_cast_tag : {
|
|
|
1933 |
/* Cast expressions */
|
|
|
1934 |
TYPE t = DEREF_type ( exp_type ( e ) ) ;
|
|
|
1935 |
EXP a = DEREF_exp ( exp_cast_arg ( e ) ) ;
|
|
|
1936 |
ua = ( use & ~va_other ) ;
|
|
|
1937 |
ua = flow_exp ( a, ua ) ;
|
|
|
1938 |
if ( IS_type_bottom ( t ) ) {
|
|
|
1939 |
/* Allow for casting to bottom */
|
|
|
1940 |
ua = flow_terminate ( ua, 1 ) ;
|
|
|
1941 |
}
|
|
|
1942 |
break ;
|
|
|
1943 |
}
|
|
|
1944 |
|
|
|
1945 |
case exp_base_cast_tag : {
|
|
|
1946 |
/* Base cast expressions */
|
|
|
1947 |
EXP a = DEREF_exp ( exp_base_cast_arg ( e ) ) ;
|
|
|
1948 |
ua = ( use & ~va_other ) ;
|
|
|
1949 |
ua = flow_exp ( a, ua ) ;
|
|
|
1950 |
break ;
|
|
|
1951 |
}
|
|
|
1952 |
|
|
|
1953 |
case exp_dyn_cast_tag : {
|
|
|
1954 |
/* Dynamic cast expressions */
|
|
|
1955 |
EXP a = DEREF_exp ( exp_dyn_cast_arg ( e ) ) ;
|
|
|
1956 |
ua = ( use & ~va_other ) ;
|
|
|
1957 |
ua = flow_exp ( a, ua ) ;
|
|
|
1958 |
break ;
|
|
|
1959 |
}
|
|
|
1960 |
|
|
|
1961 |
case exp_add_ptr_tag : {
|
|
|
1962 |
/* Pointer addition expressions */
|
|
|
1963 |
EXP a = DEREF_exp ( exp_add_ptr_ptr ( e ) ) ;
|
|
|
1964 |
OFFSET off = DEREF_off ( exp_add_ptr_off ( e ) ) ;
|
|
|
1965 |
if ( !IS_NULL_list ( crt_flow_mems ) && is_this_exp ( a ) ) {
|
|
|
1966 |
/* Have 'this->off' */
|
|
|
1967 |
use &= ~va_other ;
|
|
|
1968 |
ua = flow_offset ( off, use, 1 ) ;
|
|
|
1969 |
break ;
|
|
|
1970 |
}
|
|
|
1971 |
ua = flow_offset ( off, ua, 0 ) ;
|
|
|
1972 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
1973 |
use &= ~va_other ;
|
|
|
1974 |
ua = flow_exp ( a, use ) ;
|
|
|
1975 |
break ;
|
|
|
1976 |
}
|
|
|
1977 |
|
|
|
1978 |
case exp_offset_size_tag : {
|
|
|
1979 |
/* Offset expressions */
|
|
|
1980 |
OFFSET off = DEREF_off ( exp_offset_size_off ( e ) ) ;
|
|
|
1981 |
ua = flow_offset ( off, ua, 0 ) ;
|
|
|
1982 |
break ;
|
|
|
1983 |
}
|
|
|
1984 |
|
|
|
1985 |
case exp_constr_tag : {
|
|
|
1986 |
/* Constructor calls */
|
|
|
1987 |
EXP a = DEREF_exp ( exp_constr_call ( e ) ) ;
|
|
|
1988 |
ua = flow_exp ( a, ua ) ;
|
|
|
1989 |
break ;
|
|
|
1990 |
}
|
|
|
1991 |
|
|
|
1992 |
case exp_destr_tag : {
|
|
|
1993 |
/* Destructor calls */
|
|
|
1994 |
EXP a = DEREF_exp ( exp_destr_call ( e ) ) ;
|
|
|
1995 |
ua = flow_exp ( a, ua ) ;
|
|
|
1996 |
break ;
|
|
|
1997 |
}
|
|
|
1998 |
|
|
|
1999 |
case exp_alloc_tag : {
|
|
|
2000 |
/* Allocation expressions */
|
|
|
2001 |
EXP a = DEREF_exp ( exp_alloc_call ( e ) ) ;
|
|
|
2002 |
EXP b = DEREF_exp ( exp_alloc_init ( e ) ) ;
|
|
|
2003 |
ua = flow_exp ( a, ua ) ;
|
|
|
2004 |
ua = flow_exp ( b, ua ) ;
|
|
|
2005 |
break ;
|
|
|
2006 |
}
|
|
|
2007 |
|
|
|
2008 |
case exp_dealloc_tag : {
|
|
|
2009 |
/* Deallocation expressions */
|
|
|
2010 |
EXP a = DEREF_exp ( exp_dealloc_term ( e ) ) ;
|
|
|
2011 |
EXP b = DEREF_exp ( exp_dealloc_call ( e ) ) ;
|
|
|
2012 |
EXP c = DEREF_exp ( exp_dealloc_arg ( e ) ) ;
|
|
|
2013 |
EXP d = DEREF_exp ( exp_dummy_value ( c ) ) ;
|
|
|
2014 |
ua = flow_exp ( a, ua ) ;
|
|
|
2015 |
ua = flow_exp ( b, ua ) ;
|
|
|
2016 |
ua = flow_set ( d, ua, va_none ) ;
|
|
|
2017 |
break ;
|
|
|
2018 |
}
|
|
|
2019 |
|
|
|
2020 |
case exp_rtti_tag : {
|
|
|
2021 |
/* Run-time type information expressions */
|
|
|
2022 |
EXP a = DEREF_exp ( exp_rtti_arg ( e ) ) ;
|
|
|
2023 |
ua = flow_exp ( a, ua ) ;
|
|
|
2024 |
break ;
|
|
|
2025 |
}
|
|
|
2026 |
|
|
|
2027 |
case exp_dynamic_tag : {
|
|
|
2028 |
/* Dynamic initialiser expressions */
|
|
|
2029 |
EXP a = DEREF_exp ( exp_dynamic_arg ( e ) ) ;
|
|
|
2030 |
ua = flow_exp ( a, ua ) ;
|
|
|
2031 |
break ;
|
|
|
2032 |
}
|
|
|
2033 |
|
|
|
2034 |
case exp_aggregate_tag : {
|
|
|
2035 |
/* Aggregate initialiser expressions */
|
|
|
2036 |
LIST ( EXP ) args ;
|
|
|
2037 |
args = DEREF_list ( exp_aggregate_args ( e ) ) ;
|
|
|
2038 |
ua = flow_exp_list ( args, ua, 0 ) ;
|
|
|
2039 |
break ;
|
|
|
2040 |
}
|
|
|
2041 |
|
|
|
2042 |
case exp_initialiser_tag : {
|
|
|
2043 |
/* Constructor initialiser expressions */
|
|
|
2044 |
int kind = DEREF_int ( exp_initialiser_kind ( e ) ) ;
|
|
|
2045 |
LIST ( EXP ) p = DEREF_list ( exp_initialiser_args ( e ) ) ;
|
|
|
2046 |
LIST ( OFFSET ) q = DEREF_list ( exp_initialiser_offs ( e ) ) ;
|
|
|
2047 |
if ( kind == 0 ) q = NULL_list ( OFFSET ) ;
|
|
|
2048 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
2049 |
EXP a = DEREF_exp ( HEAD_list ( p ) ) ;
|
|
|
2050 |
ua = flow_exp ( a, ua ) ;
|
|
|
2051 |
if ( !IS_NULL_list ( q ) ) {
|
|
|
2052 |
OFFSET off = DEREF_off ( HEAD_list ( q ) ) ;
|
|
|
2053 |
if ( kind != DEFAULT_DESTR && !IS_NULL_exp ( a ) ) {
|
|
|
2054 |
ua |= va_assign ;
|
|
|
2055 |
}
|
|
|
2056 |
ua = flow_offset ( off, ua, 1 ) ;
|
|
|
2057 |
flow_sequence_point () ;
|
|
|
2058 |
q = TAIL_list ( q ) ;
|
|
|
2059 |
}
|
|
|
2060 |
p = TAIL_list ( p ) ;
|
|
|
2061 |
}
|
|
|
2062 |
break ;
|
|
|
2063 |
}
|
|
|
2064 |
|
|
|
2065 |
case exp_nof_tag : {
|
|
|
2066 |
/* Array initialiser expressions */
|
|
|
2067 |
EXP a = DEREF_exp ( exp_nof_start ( e ) ) ;
|
|
|
2068 |
EXP b = DEREF_exp ( exp_nof_pad ( e ) ) ;
|
|
|
2069 |
EXP c = DEREF_exp ( exp_nof_end ( e ) ) ;
|
|
|
2070 |
ua = flow_exp ( a, ua ) ;
|
|
|
2071 |
ua = flow_exp ( b, ua ) ;
|
|
|
2072 |
ua = flow_exp ( c, ua ) ;
|
|
|
2073 |
break ;
|
|
|
2074 |
}
|
|
|
2075 |
|
|
|
2076 |
case exp_comma_tag : {
|
|
|
2077 |
/* Comma expressions */
|
|
|
2078 |
LIST ( EXP ) p = DEREF_list ( exp_comma_args ( e ) ) ;
|
|
|
2079 |
if ( !IS_NULL_list ( p ) ) {
|
|
|
2080 |
EXP a ;
|
|
|
2081 |
for ( ; ; ) {
|
|
|
2082 |
a = DEREF_exp ( HEAD_list ( p ) ) ;
|
|
|
2083 |
p = TAIL_list ( p ) ;
|
|
|
2084 |
if ( IS_NULL_list ( p ) ) break ;
|
|
|
2085 |
ua = flow_exp ( a, ua ) ;
|
|
|
2086 |
flow_sequence_point () ;
|
|
|
2087 |
if ( ua & va_unreached ) use |= va_unreached ;
|
|
|
2088 |
}
|
|
|
2089 |
ua = flow_exp ( a, use ) ;
|
|
|
2090 |
}
|
|
|
2091 |
break ;
|
|
|
2092 |
}
|
|
|
2093 |
|
|
|
2094 |
case exp_if_stmt_tag : {
|
|
|
2095 |
/* Conditional expressions */
|
|
|
2096 |
EXP c = DEREF_exp ( exp_if_stmt_cond ( e ) ) ;
|
|
|
2097 |
EXP a = DEREF_exp ( exp_if_stmt_true_code ( e ) ) ;
|
|
|
2098 |
EXP b = DEREF_exp ( exp_if_stmt_false_code ( e ) ) ;
|
|
|
2099 |
ua = flow_if_exp ( c, a, b, ua, 1 ) ;
|
|
|
2100 |
break ;
|
|
|
2101 |
}
|
|
|
2102 |
|
|
|
2103 |
case exp_exception_tag : {
|
|
|
2104 |
/* Exception expressions */
|
|
|
2105 |
EXP a = DEREF_exp ( exp_exception_arg ( e ) ) ;
|
|
|
2106 |
ua = flow_exp ( a, ua ) ;
|
|
|
2107 |
ua = flow_terminate ( ua, 1 ) ;
|
|
|
2108 |
break ;
|
|
|
2109 |
}
|
|
|
2110 |
|
|
|
2111 |
case exp_set_tag : {
|
|
|
2112 |
/* Set expressions */
|
|
|
2113 |
EXP a = DEREF_exp ( exp_set_arg ( e ) ) ;
|
|
|
2114 |
ua = flow_set ( a, ua, va_set ) ;
|
|
|
2115 |
break ;
|
|
|
2116 |
}
|
|
|
2117 |
|
|
|
2118 |
case exp_unused_tag : {
|
|
|
2119 |
/* Unused expressions */
|
|
|
2120 |
EXP a = DEREF_exp ( exp_unused_arg ( e ) ) ;
|
|
|
2121 |
ua = flow_set ( a, ua, va_none ) ;
|
|
|
2122 |
break ;
|
|
|
2123 |
}
|
|
|
2124 |
|
|
|
2125 |
case exp_op_tag : {
|
|
|
2126 |
/* Undetermined expressions */
|
|
|
2127 |
EXP a = DEREF_exp ( exp_op_arg1 ( e ) ) ;
|
|
|
2128 |
EXP b = DEREF_exp ( exp_op_arg2 ( e ) ) ;
|
|
|
2129 |
ua = flow_exp ( a, ua ) ;
|
|
|
2130 |
ua = flow_exp ( b, ua ) ;
|
|
|
2131 |
break ;
|
|
|
2132 |
}
|
|
|
2133 |
|
|
|
2134 |
case exp_opn_tag : {
|
|
|
2135 |
/* Undetermined expressions */
|
|
|
2136 |
LIST ( EXP ) args = DEREF_list ( exp_opn_args ( e ) ) ;
|
|
|
2137 |
ua = flow_exp_list ( args, ua, 0 ) ;
|
|
|
2138 |
break ;
|
|
|
2139 |
}
|
|
|
2140 |
|
|
|
2141 |
case exp_token_tag : {
|
|
|
2142 |
/* Tokenised expressions */
|
|
|
2143 |
LIST ( TOKEN ) args = DEREF_list ( exp_token_args ( e ) ) ;
|
|
|
2144 |
ua = flow_token_list ( args, ua ) ;
|
|
|
2145 |
break ;
|
|
|
2146 |
}
|
|
|
2147 |
|
|
|
2148 |
case exp_dummy_tag : {
|
|
|
2149 |
/* Dummy expressions */
|
|
|
2150 |
EXP a = DEREF_exp ( exp_dummy_value ( e ) ) ;
|
|
|
2151 |
ua = flow_exp ( a, use ) ;
|
|
|
2152 |
break ;
|
|
|
2153 |
}
|
|
|
2154 |
|
|
|
2155 |
case exp_paren_tag :
|
|
|
2156 |
case exp_copy_tag : {
|
|
|
2157 |
/* Parenthesised expressions */
|
|
|
2158 |
EXP a = DEREF_exp ( exp_paren_etc_arg ( e ) ) ;
|
|
|
2159 |
ua = flow_exp ( a, use ) ;
|
|
|
2160 |
break ;
|
|
|
2161 |
}
|
|
|
2162 |
|
|
|
2163 |
case exp_location_tag : {
|
|
|
2164 |
/* Location expressions */
|
|
|
2165 |
EXP a = DEREF_exp ( exp_location_arg ( e ) ) ;
|
|
|
2166 |
ua = flow_exp ( a, use ) ;
|
|
|
2167 |
DEREF_loc ( exp_location_end ( e ), stmt_loc ) ;
|
|
|
2168 |
break ;
|
|
|
2169 |
}
|
|
|
2170 |
|
|
|
2171 |
case exp_sequence_tag :
|
|
|
2172 |
case exp_solve_stmt_tag :
|
|
|
2173 |
case exp_decl_stmt_tag :
|
|
|
2174 |
case exp_while_stmt_tag :
|
|
|
2175 |
case exp_do_stmt_tag :
|
|
|
2176 |
case exp_switch_stmt_tag :
|
|
|
2177 |
case exp_hash_if_tag :
|
|
|
2178 |
case exp_return_stmt_tag :
|
|
|
2179 |
case exp_goto_stmt_tag :
|
|
|
2180 |
case exp_label_stmt_tag :
|
|
|
2181 |
case exp_try_block_tag :
|
|
|
2182 |
case exp_handler_tag :
|
|
|
2183 |
case exp_reach_tag :
|
|
|
2184 |
case exp_unreach_tag : {
|
|
|
2185 |
/* Statements */
|
|
|
2186 |
ua = flow_stmt ( e, ua, 1 ) ;
|
|
|
2187 |
break ;
|
|
|
2188 |
}
|
|
|
2189 |
}
|
|
|
2190 |
ua &= ~va_mask ;
|
|
|
2191 |
return ( ua ) ;
|
|
|
2192 |
}
|
|
|
2193 |
|
|
|
2194 |
|
|
|
2195 |
/*
|
|
|
2196 |
PERFORM FLOW ANALYSIS FOR DESTRUCTORS
|
|
|
2197 |
|
|
|
2198 |
This routine performs flow analysis for any destructors called by
|
|
|
2199 |
the goto or return statement a. b gives smallest statement enclosing
|
|
|
2200 |
both the jump and its destination.
|
|
|
2201 |
*/
|
|
|
2202 |
|
|
|
2203 |
static void flow_jump
|
|
|
2204 |
PROTO_N ( ( a, b ) )
|
|
|
2205 |
PROTO_T ( EXP a X EXP b )
|
|
|
2206 |
{
|
|
|
2207 |
unsigned long d = no_destructors ;
|
|
|
2208 |
while ( !IS_NULL_exp ( a ) && !EQ_exp ( a, b ) && d ) {
|
|
|
2209 |
/* Scan up to enclosing statement */
|
|
|
2210 |
if ( IS_exp_decl_stmt ( a ) ) {
|
|
|
2211 |
IDENTIFIER id = DEREF_id ( exp_decl_stmt_id ( a ) ) ;
|
|
|
2212 |
if ( IS_id_variable ( id ) ) {
|
|
|
2213 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
2214 |
if ( ds & dspec_auto ) {
|
|
|
2215 |
/* Local variable */
|
|
|
2216 |
EXP term = DEREF_exp ( id_variable_term ( id ) ) ;
|
|
|
2217 |
if ( !IS_NULL_exp ( term ) ) {
|
|
|
2218 |
if ( do_usage ) dump_destr ( id, &stmt_loc ) ;
|
|
|
2219 |
d-- ;
|
|
|
2220 |
}
|
|
|
2221 |
}
|
|
|
2222 |
}
|
|
|
2223 |
}
|
|
|
2224 |
a = get_parent_stmt ( a ) ;
|
|
|
2225 |
}
|
|
|
2226 |
return ;
|
|
|
2227 |
}
|
|
|
2228 |
|
|
|
2229 |
|
|
|
2230 |
/*
|
|
|
2231 |
PERFORM FLOW ANALYSIS ON A WHILE STATEMENT
|
|
|
2232 |
|
|
|
2233 |
This routine performs flow analysis on the while statement e.
|
|
|
2234 |
*/
|
|
|
2235 |
|
|
|
2236 |
static VAR_INFO flow_while_stmt
|
|
|
2237 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2238 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2239 |
{
|
|
|
2240 |
VAR_INFO ua ;
|
|
|
2241 |
EXP c = DEREF_exp ( exp_while_stmt_cond ( e ) ) ;
|
|
|
2242 |
EXP a = DEREF_exp ( exp_while_stmt_body ( e ) ) ;
|
|
|
2243 |
IDENTIFIER blab = DEREF_id ( exp_while_stmt_break_lab ( e ) ) ;
|
|
|
2244 |
IDENTIFIER clab = DEREF_id ( exp_while_stmt_cont_lab ( e ) ) ;
|
|
|
2245 |
unsigned cv = eval_const_cond ( c ) ;
|
|
|
2246 |
if ( flow ) {
|
|
|
2247 |
use = flow_exp ( c, use ) ;
|
|
|
2248 |
flow_sequence_point () ;
|
|
|
2249 |
}
|
|
|
2250 |
ua = use ;
|
|
|
2251 |
if ( cv != BOOL_TRUE ) {
|
|
|
2252 |
IGNORE flow_goto_stmt ( blab, use, 1 ) ;
|
|
|
2253 |
if ( cv == BOOL_FALSE ) ua |= va_unreached ;
|
|
|
2254 |
}
|
|
|
2255 |
ua = flow_stmt ( a, ua, flow ) ;
|
|
|
2256 |
ua = flow_label_stmt ( clab, ua, flow ) ;
|
|
|
2257 |
if ( flow ) {
|
|
|
2258 |
IGNORE flow_exp ( c, ua ) ;
|
|
|
2259 |
flow_sequence_point () ;
|
|
|
2260 |
}
|
|
|
2261 |
mark_vars ( crt_flow_vars, va_used_this ) ;
|
|
|
2262 |
use = flow_label_stmt ( blab, ( use | va_unreached ), flow ) ;
|
|
|
2263 |
return ( use ) ;
|
|
|
2264 |
}
|
|
|
2265 |
|
|
|
2266 |
|
|
|
2267 |
/*
|
|
|
2268 |
PERFORM FLOW ANALYSIS ON A DO STATEMENT
|
|
|
2269 |
|
|
|
2270 |
This routine performs flow analysis on the do statement e.
|
|
|
2271 |
*/
|
|
|
2272 |
|
|
|
2273 |
static VAR_INFO flow_do_stmt
|
|
|
2274 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2275 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2276 |
{
|
|
|
2277 |
EXP c = DEREF_exp ( exp_do_stmt_cond ( e ) ) ;
|
|
|
2278 |
EXP a = DEREF_exp ( exp_do_stmt_body ( e ) ) ;
|
|
|
2279 |
IDENTIFIER blab = DEREF_id ( exp_do_stmt_break_lab ( e ) ) ;
|
|
|
2280 |
IDENTIFIER clab = DEREF_id ( exp_do_stmt_cont_lab ( e ) ) ;
|
|
|
2281 |
unsigned cv = eval_const_cond ( c ) ;
|
|
|
2282 |
use = flow_stmt ( a, use, flow ) ;
|
|
|
2283 |
use = flow_label_stmt ( clab, use, flow ) ;
|
|
|
2284 |
if ( flow ) {
|
|
|
2285 |
use = flow_exp ( c, use ) ;
|
|
|
2286 |
flow_sequence_point () ;
|
|
|
2287 |
}
|
|
|
2288 |
mark_vars ( crt_flow_vars, va_used_this ) ;
|
|
|
2289 |
if ( cv == BOOL_TRUE ) use |= va_unreached ;
|
|
|
2290 |
use = flow_label_stmt ( blab, use, flow ) ;
|
|
|
2291 |
return ( use ) ;
|
|
|
2292 |
}
|
|
|
2293 |
|
|
|
2294 |
|
|
|
2295 |
/*
|
|
|
2296 |
PERFORM FLOW ANALYSIS ON A SOLVE STATEMENT
|
|
|
2297 |
|
|
|
2298 |
This routine performs flow analysis on the solve statement e with
|
|
|
2299 |
associated variables p.
|
|
|
2300 |
*/
|
|
|
2301 |
|
|
|
2302 |
static VAR_INFO flow_solve_stmt
|
|
|
2303 |
PROTO_N ( ( e, p, use, flow ) )
|
|
|
2304 |
PROTO_T ( EXP e X LIST ( IDENTIFIER ) p X VAR_INFO use X int flow )
|
|
|
2305 |
{
|
|
|
2306 |
if ( !IS_NULL_list ( p ) ) {
|
|
|
2307 |
/* Scan through variables */
|
|
|
2308 |
IDENTIFIER id = DEREF_id ( HEAD_list ( p ) ) ;
|
|
|
2309 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
2310 |
if ( ( ds & dspec_auto ) && !( ds & dspec_done ) ) {
|
|
|
2311 |
start_variable ( id, ds, va_none ) ;
|
|
|
2312 |
use = flow_solve_stmt ( e, TAIL_list ( p ), use, flow ) ;
|
|
|
2313 |
end_variable ( flow, 0 ) ;
|
|
|
2314 |
return ( use ) ;
|
|
|
2315 |
}
|
|
|
2316 |
use = flow_solve_stmt ( e, TAIL_list ( p ), use, flow ) ;
|
|
|
2317 |
return ( use ) ;
|
|
|
2318 |
}
|
|
|
2319 |
use = flow_stmt ( e, use, flow ) ;
|
|
|
2320 |
return ( use ) ;
|
|
|
2321 |
}
|
|
|
2322 |
|
|
|
2323 |
|
|
|
2324 |
/*
|
|
|
2325 |
PERFORM FLOW ANALYSIS ON A SWITCH STATEMENT
|
|
|
2326 |
|
|
|
2327 |
This routine performs flow analysis on the switch statement e.
|
|
|
2328 |
*/
|
|
|
2329 |
|
|
|
2330 |
static VAR_INFO flow_switch_stmt
|
|
|
2331 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2332 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2333 |
{
|
|
|
2334 |
EXP a = DEREF_exp ( exp_switch_stmt_body ( e ) ) ;
|
|
|
2335 |
int exhaust = DEREF_int ( exp_switch_stmt_exhaust ( e ) ) ;
|
|
|
2336 |
LIST ( IDENTIFIER ) p = DEREF_list ( exp_switch_stmt_case_labs ( e ) ) ;
|
|
|
2337 |
IDENTIFIER dlab = DEREF_id ( exp_switch_stmt_default_lab ( e ) ) ;
|
|
|
2338 |
IDENTIFIER blab = DEREF_id ( exp_switch_stmt_break_lab ( e ) ) ;
|
|
|
2339 |
if ( flow ) {
|
|
|
2340 |
/* Deal with control statement */
|
|
|
2341 |
EXP c = DEREF_exp ( exp_switch_stmt_control ( e ) ) ;
|
|
|
2342 |
use = flow_exp ( c, use ) ;
|
|
|
2343 |
flow_sequence_point () ;
|
|
|
2344 |
}
|
|
|
2345 |
if ( !IS_NULL_id ( dlab ) ) {
|
|
|
2346 |
/* Mark jumps to default statement */
|
|
|
2347 |
dlab = DEREF_id ( id_alias ( dlab ) ) ;
|
|
|
2348 |
IGNORE flow_goto_stmt ( dlab, use, 1 ) ;
|
|
|
2349 |
exhaust = 1 ;
|
|
|
2350 |
}
|
|
|
2351 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
2352 |
/* Mark jumps to case statements */
|
|
|
2353 |
IDENTIFIER clab = DEREF_id ( HEAD_list ( p ) ) ;
|
|
|
2354 |
clab = DEREF_id ( id_alias ( clab ) ) ;
|
|
|
2355 |
if ( !EQ_id ( clab, dlab ) ) {
|
|
|
2356 |
/* Only mark each label once */
|
|
|
2357 |
IGNORE flow_goto_stmt ( clab, use, 1 ) ;
|
|
|
2358 |
dlab = clab ;
|
|
|
2359 |
}
|
|
|
2360 |
p = TAIL_list ( p ) ;
|
|
|
2361 |
}
|
|
|
2362 |
if ( !exhaust ) {
|
|
|
2363 |
/* Break label is reached in non-exhaustive cases */
|
|
|
2364 |
IGNORE flow_goto_stmt ( blab, use, 1 ) ;
|
|
|
2365 |
}
|
|
|
2366 |
use = flow_stmt ( a, ( use | va_unreached ), flow ) ;
|
|
|
2367 |
use = flow_label_stmt ( blab, use, flow ) ;
|
|
|
2368 |
return ( use ) ;
|
|
|
2369 |
}
|
|
|
2370 |
|
|
|
2371 |
|
|
|
2372 |
/*
|
|
|
2373 |
PERFORM FLOW ANALYSIS ON A TRY BLOCK
|
|
|
2374 |
|
|
|
2375 |
This routine performs flow analysis on the try block e.
|
|
|
2376 |
*/
|
|
|
2377 |
|
|
|
2378 |
static VAR_INFO flow_try_block
|
|
|
2379 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2380 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2381 |
{
|
|
|
2382 |
VAR_INFO ua = ( use | va_unreached ) ;
|
|
|
2383 |
EXP a = DEREF_exp ( exp_try_block_body ( e ) ) ;
|
|
|
2384 |
LIST ( EXP ) p = DEREF_list ( exp_try_block_handlers ( e ) ) ;
|
|
|
2385 |
EXP c = DEREF_exp ( exp_try_block_ellipsis ( e ) ) ;
|
|
|
2386 |
use = flow_stmt ( a, use, flow ) ;
|
|
|
2387 |
/* NOT YET IMPLEMENTED */
|
|
|
2388 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
2389 |
EXP b = DEREF_exp ( HEAD_list ( p ) ) ;
|
|
|
2390 |
IGNORE flow_stmt ( b, ua, flow ) ;
|
|
|
2391 |
p = TAIL_list ( p ) ;
|
|
|
2392 |
}
|
|
|
2393 |
IGNORE flow_stmt ( c, ua, flow ) ;
|
|
|
2394 |
return ( use ) ;
|
|
|
2395 |
}
|
|
|
2396 |
|
|
|
2397 |
|
|
|
2398 |
/*
|
|
|
2399 |
PERFORM FLOW ANALYSIS ON A DECLARATION STATEMENT
|
|
|
2400 |
|
|
|
2401 |
This routine performs flow analysis on the declaration statement e.
|
|
|
2402 |
*/
|
|
|
2403 |
|
|
|
2404 |
static VAR_INFO flow_decl_stmt
|
|
|
2405 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2406 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2407 |
{
|
|
|
2408 |
EXP a = DEREF_exp ( exp_decl_stmt_body ( e ) ) ;
|
|
|
2409 |
IDENTIFIER id = DEREF_id ( exp_decl_stmt_id ( e ) ) ;
|
|
|
2410 |
if ( IS_id_variable ( id ) ) {
|
|
|
2411 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( id ) ) ;
|
|
|
2412 |
if ( ds & dspec_auto ) {
|
|
|
2413 |
/* Local variable */
|
|
|
2414 |
EXP b = DEREF_exp ( id_variable_init ( id ) ) ;
|
|
|
2415 |
EXP d = DEREF_exp ( id_variable_term ( id ) ) ;
|
|
|
2416 |
if ( !IS_NULL_exp ( d ) ) no_destructors++ ;
|
|
|
2417 |
if ( !( ds & dspec_done ) ) {
|
|
|
2418 |
start_variable ( id, ds, va_none ) ;
|
|
|
2419 |
}
|
|
|
2420 |
if ( !IS_NULL_exp ( b ) ) {
|
|
|
2421 |
/* Initialiser expression */
|
|
|
2422 |
if ( flow ) use = flow_alias_exp ( b, use ) ;
|
|
|
2423 |
set_variable ( id, ( use | va_assign ) ) ;
|
|
|
2424 |
flow_sequence_point () ;
|
|
|
2425 |
}
|
|
|
2426 |
use = flow_stmt ( a, use, flow ) ;
|
|
|
2427 |
if ( flow ) {
|
|
|
2428 |
/* Destructor */
|
|
|
2429 |
use = flow_exp ( d, use ) ;
|
|
|
2430 |
flow_sequence_point () ;
|
|
|
2431 |
}
|
|
|
2432 |
if ( !( ds & dspec_done ) ) end_variable ( flow, 0 ) ;
|
|
|
2433 |
if ( !IS_NULL_exp ( d ) ) no_destructors-- ;
|
|
|
2434 |
return ( use ) ;
|
|
|
2435 |
}
|
|
|
2436 |
}
|
|
|
2437 |
use = flow_stmt ( a, use, flow ) ;
|
|
|
2438 |
return ( use ) ;
|
|
|
2439 |
}
|
|
|
2440 |
|
|
|
2441 |
|
|
|
2442 |
/*
|
|
|
2443 |
PERFORM FLOW ANALYSIS ON A STATEMENT
|
|
|
2444 |
|
|
|
2445 |
This routine performs flow analysis on the statement e.
|
|
|
2446 |
*/
|
|
|
2447 |
|
|
|
2448 |
static VAR_INFO flow_stmt
|
|
|
2449 |
PROTO_N ( ( e, use, flow ) )
|
|
|
2450 |
PROTO_T ( EXP e X VAR_INFO use X int flow )
|
|
|
2451 |
{
|
|
|
2452 |
/* Deal with statements */
|
|
|
2453 |
VAR_INFO ua = ( use & ~va_mask ) ;
|
|
|
2454 |
if ( IS_NULL_exp ( e ) ) return ( ua ) ;
|
|
|
2455 |
ASSERT ( ORDER_exp == 88 ) ;
|
|
|
2456 |
switch ( TAG_exp ( e ) ) {
|
|
|
2457 |
|
|
|
2458 |
case exp_sequence_tag : {
|
|
|
2459 |
/* Compound statements */
|
|
|
2460 |
LIST ( EXP ) p = DEREF_list ( exp_sequence_first ( e ) ) ;
|
|
|
2461 |
while ( !IS_NULL_list ( p ) ) {
|
|
|
2462 |
EXP a = DEREF_exp ( HEAD_list ( p ) ) ;
|
|
|
2463 |
if ( !IS_NULL_exp ( a ) ) {
|
|
|
2464 |
VAR_INFO ub = flow_stmt ( a, ua, flow ) ;
|
|
|
2465 |
if ( ub & va_unreached ) {
|
|
|
2466 |
ua |= va_unreached ;
|
|
|
2467 |
} else {
|
|
|
2468 |
ua &= ~va_unreached ;
|
|
|
2469 |
}
|
|
|
2470 |
}
|
|
|
2471 |
p = TAIL_list ( p ) ;
|
|
|
2472 |
}
|
|
|
2473 |
break ;
|
|
|
2474 |
}
|
|
|
2475 |
|
|
|
2476 |
case exp_solve_stmt_tag : {
|
|
|
2477 |
/* Solve statements */
|
|
|
2478 |
LIST ( IDENTIFIER ) p ;
|
|
|
2479 |
EXP a = DEREF_exp ( exp_solve_stmt_body ( e ) ) ;
|
|
|
2480 |
p = DEREF_list ( exp_solve_stmt_vars ( e ) ) ;
|
|
|
2481 |
ua = flow_solve_stmt ( a, p, ua, flow ) ;
|
|
|
2482 |
break ;
|
|
|
2483 |
}
|
|
|
2484 |
|
|
|
2485 |
case exp_decl_stmt_tag : {
|
|
|
2486 |
/* Declaration statements */
|
|
|
2487 |
ua = flow_decl_stmt ( e, ua, flow ) ;
|
|
|
2488 |
break ;
|
|
|
2489 |
}
|
|
|
2490 |
|
|
|
2491 |
case exp_if_stmt_tag : {
|
|
|
2492 |
/* Conditional statements */
|
|
|
2493 |
EXP c = DEREF_exp ( exp_if_stmt_cond ( e ) ) ;
|
|
|
2494 |
EXP a = DEREF_exp ( exp_if_stmt_true_code ( e ) ) ;
|
|
|
2495 |
EXP b = DEREF_exp ( exp_if_stmt_false_code ( e ) ) ;
|
|
|
2496 |
ua = flow_if_exp ( c, a, b, ua, flow ) ;
|
|
|
2497 |
break ;
|
|
|
2498 |
}
|
|
|
2499 |
|
|
|
2500 |
case exp_while_stmt_tag : {
|
|
|
2501 |
/* While statements */
|
|
|
2502 |
ua = flow_while_stmt ( e, ua, flow ) ;
|
|
|
2503 |
break ;
|
|
|
2504 |
}
|
|
|
2505 |
|
|
|
2506 |
case exp_do_stmt_tag : {
|
|
|
2507 |
/* Do statements */
|
|
|
2508 |
ua = flow_do_stmt ( e, ua, flow ) ;
|
|
|
2509 |
break ;
|
|
|
2510 |
}
|
|
|
2511 |
|
|
|
2512 |
case exp_switch_stmt_tag : {
|
|
|
2513 |
/* Switch statements */
|
|
|
2514 |
ua = flow_switch_stmt ( e, ua, flow ) ;
|
|
|
2515 |
break ;
|
|
|
2516 |
}
|
|
|
2517 |
|
|
|
2518 |
case exp_hash_if_tag : {
|
|
|
2519 |
/* Target dependent conditional statements */
|
|
|
2520 |
EXP c = DEREF_exp ( exp_hash_if_cond ( e ) ) ;
|
|
|
2521 |
EXP a = DEREF_exp ( exp_hash_if_true_code ( e ) ) ;
|
|
|
2522 |
EXP b = DEREF_exp ( exp_hash_if_false_code ( e ) ) ;
|
|
|
2523 |
ua = flow_if_exp ( c, a, b, ua, flow ) ;
|
|
|
2524 |
break ;
|
|
|
2525 |
}
|
|
|
2526 |
|
|
|
2527 |
case exp_return_stmt_tag : {
|
|
|
2528 |
/* Return statements */
|
|
|
2529 |
EXP a = DEREF_exp ( exp_return_stmt_value ( e ) ) ;
|
|
|
2530 |
if ( flow ) {
|
|
|
2531 |
ua = flow_exp ( a, ua ) ;
|
|
|
2532 |
flow_sequence_point () ;
|
|
|
2533 |
}
|
|
|
2534 |
ua = flow_terminate ( ua, 2 ) ;
|
|
|
2535 |
flow_jump ( e, NULL_exp ) ;
|
|
|
2536 |
break ;
|
|
|
2537 |
}
|
|
|
2538 |
|
|
|
2539 |
case exp_goto_stmt_tag : {
|
|
|
2540 |
/* Goto statements */
|
|
|
2541 |
EXP join = DEREF_exp ( exp_goto_stmt_join ( e ) ) ;
|
|
|
2542 |
IDENTIFIER lab = DEREF_id ( exp_goto_stmt_label ( e ) ) ;
|
|
|
2543 |
lab = DEREF_id ( id_alias ( lab ) ) ;
|
|
|
2544 |
ua = flow_goto_stmt ( lab, ua, 0 ) ;
|
|
|
2545 |
flow_jump ( e, join ) ;
|
|
|
2546 |
break ;
|
|
|
2547 |
}
|
|
|
2548 |
|
|
|
2549 |
case exp_label_stmt_tag : {
|
|
|
2550 |
/* Labelled statements */
|
|
|
2551 |
IDENTIFIER lab = DEREF_id ( exp_label_stmt_label ( e ) ) ;
|
|
|
2552 |
ua = flow_label_stmt ( lab, ua, flow ) ;
|
|
|
2553 |
break ;
|
|
|
2554 |
}
|
|
|
2555 |
|
|
|
2556 |
case exp_try_block_tag : {
|
|
|
2557 |
/* Try blocks */
|
|
|
2558 |
ua = flow_try_block ( e, ua, flow ) ;
|
|
|
2559 |
break ;
|
|
|
2560 |
}
|
|
|
2561 |
|
|
|
2562 |
case exp_handler_tag : {
|
|
|
2563 |
/* Exception handlers */
|
|
|
2564 |
EXP a = DEREF_exp ( exp_handler_body ( e ) ) ;
|
|
|
2565 |
ua = flow_stmt ( a, ua, flow ) ;
|
|
|
2566 |
break ;
|
|
|
2567 |
}
|
|
|
2568 |
|
|
|
2569 |
case exp_reach_tag : {
|
|
|
2570 |
/* Reached statements */
|
|
|
2571 |
EXP a = DEREF_exp ( exp_reach_body ( e ) ) ;
|
|
|
2572 |
ua &= ~va_unreached ;
|
|
|
2573 |
ua = flow_stmt ( a, ua, flow ) ;
|
|
|
2574 |
break ;
|
|
|
2575 |
}
|
|
|
2576 |
|
|
|
2577 |
case exp_unreach_tag : {
|
|
|
2578 |
/* Unreached statements */
|
|
|
2579 |
EXP a = DEREF_exp ( exp_unreach_body ( e ) ) ;
|
|
|
2580 |
ua |= va_unreached ;
|
|
|
2581 |
ua = flow_stmt ( a, ua, flow ) ;
|
|
|
2582 |
break ;
|
|
|
2583 |
}
|
|
|
2584 |
|
|
|
2585 |
case exp_location_tag : {
|
|
|
2586 |
/* Location expressions */
|
|
|
2587 |
EXP a = DEREF_exp ( exp_location_arg ( e ) ) ;
|
|
|
2588 |
ua = flow_stmt ( a, use, flow ) ;
|
|
|
2589 |
DEREF_loc ( exp_location_end ( e ), stmt_loc ) ;
|
|
|
2590 |
break ;
|
|
|
2591 |
}
|
|
|
2592 |
|
|
|
2593 |
default : {
|
|
|
2594 |
/* Simple expressions */
|
|
|
2595 |
if ( !( ua & va_unreached ) && flow ) {
|
|
|
2596 |
ua = flow_exp ( e, ua ) ;
|
|
|
2597 |
flow_sequence_point () ;
|
|
|
2598 |
}
|
|
|
2599 |
break ;
|
|
|
2600 |
}
|
|
|
2601 |
}
|
|
|
2602 |
ua &= ~va_mask ;
|
|
|
2603 |
return ( ua ) ;
|
|
|
2604 |
}
|
|
|
2605 |
|
|
|
2606 |
|
|
|
2607 |
/*
|
|
|
2608 |
PERFORM FLOW ANALYSIS ON A FUNCTION DEFINITION
|
|
|
2609 |
|
|
|
2610 |
This routine performs the flow analysis on the compound statement e
|
|
|
2611 |
which defines the function id. Full flow analysis is enabled if
|
|
|
2612 |
flow is true, otherwise a minimal scan sufficient to determine all
|
|
|
2613 |
implicit destructor calls is done.
|
|
|
2614 |
*/
|
|
|
2615 |
|
|
|
2616 |
void check_flow
|
|
|
2617 |
PROTO_N ( ( id, e, flow ) )
|
|
|
2618 |
PROTO_T ( IDENTIFIER id X EXP e X int flow )
|
|
|
2619 |
{
|
|
|
2620 |
VAR_INFO use ;
|
|
|
2621 |
LIST ( IDENTIFIER ) pids ;
|
|
|
2622 |
if ( IS_id_function_etc ( id ) ) {
|
|
|
2623 |
TYPE t = DEREF_type ( id_function_etc_type ( id ) ) ;
|
|
|
2624 |
while ( IS_type_templ ( t ) ) {
|
|
|
2625 |
t = DEREF_type ( type_templ_defn ( t ) ) ;
|
|
|
2626 |
}
|
|
|
2627 |
if ( IS_id_mem_func ( id ) ) {
|
|
|
2628 |
/* Allow for 'this' parameter and class members */
|
|
|
2629 |
IDENTIFIER pid = this_param ( id, 0 ) ;
|
|
|
2630 |
if ( flow ) {
|
|
|
2631 |
HASHID nm = DEREF_hashid ( id_name ( id ) ) ;
|
|
|
2632 |
CLASS_TYPE ct = parent_class ( id ) ;
|
|
|
2633 |
NAMESPACE ns = DEREF_nspace ( ctype_member ( ct ) ) ;
|
|
|
2634 |
MEMBER mem = DEREF_member ( nspace_ctype_first ( ns ) ) ;
|
|
|
2635 |
mem = next_data_member ( mem, 0 ) ;
|
|
|
2636 |
while ( !IS_NULL_member ( mem ) ) {
|
|
|
2637 |
IDENTIFIER mid = DEREF_id ( member_id ( mem ) ) ;
|
|
|
2638 |
start_variable ( mid, dspec_used, va_member ) ;
|
|
|
2639 |
if ( !IS_hashid_constr ( nm ) ) {
|
|
|
2640 |
/* Members are set except in constructors */
|
|
|
2641 |
set_variable ( mid, va_assign ) ;
|
|
|
2642 |
set_variable ( mid, va_none ) ;
|
|
|
2643 |
}
|
|
|
2644 |
mem = DEREF_member ( member_next ( mem ) ) ;
|
|
|
2645 |
mem = next_data_member ( mem, 0 ) ;
|
|
|
2646 |
}
|
|
|
2647 |
crt_flow_mems = crt_flow_vars ;
|
|
|
2648 |
}
|
|
|
2649 |
if ( !IS_NULL_id ( pid ) ) {
|
|
|
2650 |
start_variable ( pid, dspec_none, va_this ) ;
|
|
|
2651 |
set_variable ( pid, va_assign ) ;
|
|
|
2652 |
}
|
|
|
2653 |
}
|
|
|
2654 |
pids = DEREF_list ( type_func_pids ( t ) ) ;
|
|
|
2655 |
while ( !IS_NULL_list ( pids ) ) {
|
|
|
2656 |
/* Set up parameter scopes */
|
|
|
2657 |
IDENTIFIER pid = DEREF_id ( HEAD_list ( pids ) ) ;
|
|
|
2658 |
if ( !IS_NULL_id ( pid ) ) {
|
|
|
2659 |
DECL_SPEC ds = DEREF_dspec ( id_storage ( pid ) ) ;
|
|
|
2660 |
start_variable ( pid, ds, va_none ) ;
|
|
|
2661 |
set_variable ( pid, va_assign ) ;
|
|
|
2662 |
}
|
|
|
2663 |
pids = TAIL_list ( pids ) ;
|
|
|
2664 |
}
|
|
|
2665 |
}
|
|
|
2666 |
DEREF_loc ( id_loc ( id ), stmt_loc ) ;
|
|
|
2667 |
flow_sequence_point () ;
|
|
|
2668 |
use = flow_stmt ( e, va_none, flow ) ;
|
|
|
2669 |
IGNORE flow_terminate ( use, 2 ) ;
|
|
|
2670 |
crt_flow_mems = NULL_list ( VARIABLE ) ;
|
|
|
2671 |
while ( !IS_NULL_list ( crt_flow_vars ) ) {
|
|
|
2672 |
/* End parameter and member scopes */
|
|
|
2673 |
end_variable ( flow, 2 ) ;
|
|
|
2674 |
}
|
|
|
2675 |
stmt_loc = crt_loc ;
|
|
|
2676 |
return ;
|
|
|
2677 |
}
|