static boolean passStructOnStack( // PASS A STRUCT/CLASS ON STACK
PTREE arg, // - argument (CO_LIST)
unsigned warning ) // - internal-data warning
{
PTREE right; // - right operand
TYPE type; // - class type
right = NodeRvalue( arg->u.subtree[1] );
type = right->type;
if( right->flags & PTF_CLASS_RVREF ) {
if( right->op != PT_ERROR ) {
PTREE temp = NodeTemporary( type );
right = ClassDefaultCopyDiag( temp, right, &diagEllConv );
if( right->op != PT_ERROR ) {
right = NodeDtorExpr( right, temp->u.symcg.symbol );
if( right->op != PT_ERROR ) {
right->type = type;
right = NodeFetch( right );
right->flags &= ~PTF_LVALUE;
}
}
}
if( right->op == PT_ERROR ) {
arg->u.subtree[1] = right;
PTreeErrorNode( arg );
return FALSE;
}
}
arg_finish( right, arg );
if( TypeHasSpecialFields( type ) ) {
PTreeWarnExpr( arg, warning );
}
return TRUE;
}
static boolean arg_convert( // CONVERT AN ARGUMENT
PTREE arg, // - argument node
TYPE proto ) // - prototype type
{
boolean retn; // - return: TRUE ==> ok
if( NodeConvertArgument( &arg->u.subtree[1], proto ) ) {
arg_fillout( arg );
retn = TRUE;
} else {
PTreeErrorNode( arg );
retn = FALSE;
}
return( retn );
}
CNV_RETN ConversionDiagnose( // DIAGNOSE RETURN FROM A CONVERSION
CNV_RETN retn, // - return value: CNV_...
PTREE expr, // - current expression
CNV_DIAG *diagnosis ) // - diagnosis information
{
switch( retn ) {
case CNV_OK_TRUNC :
NodeWarnPtrTrunc( expr );
retn = CNV_OK;
break;
case CNV_OK_TRUNC_CAST :
NodeWarnPtrTruncCast( expr );
retn = CNV_OK;
break;
case CNV_ERR :
PTreeErrorNode( expr );
ConversionDiagnoseInf();
retn = CNV_ERR;
break;
case CNV_IMPOSSIBLE :
retn = conversionErr( expr, diagnosis->msg_impossible );
break;
case CNV_AMBIGUOUS :
retn = conversionErr( expr, diagnosis->msg_ambiguous );
break;
case CNV_PRIVATE :
retn = conversionErr( expr, diagnosis->msg_private );
break;
case CNV_PROTECTED :
retn = conversionErr( expr, diagnosis->msg_protected );
break;
case CNV_VIRT_DER :
retn = conversionErr( expr, diagnosis->msg_virt_der );
break;
case CNV_TRUNC_THIS :
ConversionInfDisable();
retn = conversionErr( expr, ERR_THIS_OBJ_MEM_MODEL );
break;
case CNV_OK :
break;
DbgDefault( "ConversionDiagnose: unexpected 'retn' value" );
}
return retn;
}
PTREE AnalyseReturnClassVal // RETURN CLASS VALUE
( PTREE expr ) // - expression for return
{
TYPE retn_type; // - return type
TYPE retn_class; // - class for return
PTREE tgt; // - target expression
CNV_DIAG* diag; // - diagnosis
retn_type = expr->u.subtree[0]->type;
retn_class = StructType( retn_type );
DbgVerify( retn_class != NULL, "AnalyseReturnClassVal -- not class" );
if( ClassCorrupted( retn_class ) ) {
PTreeErrorNode( expr );
} else if( TypeAbstract( retn_class ) ) {
PTreeErrorExprType( expr, ERR_CONVERT_TO_ABSTRACT_TYPE, retn_class );
ScopeNotePureFunctions( retn_class );
} else {
diag = DefargBeingCompiled() ? &diagDefarg : &diagReturn;
tgt = NodeFetchReference( getReturnSym() );
expr = removeReturnNode( expr );
expr = CopyClassRetnVal( expr, tgt, retn_type, diag );
if( expr->op != PT_ERROR ) {
if( NodeIsBinaryOp( expr, CO_DTOR ) ) {
PTREE node = expr->u.subtree[0];
if( SymFunctionReturn() == node->u.symcg.symbol ) {
PTreeFree( node );
node = expr;
expr = expr->u.subtree[1];
PTreeFree( node );
}
}
}
#if 0
// this is just so we can do some checking
expr = CastImplicit( expr
, retn_type
, CNV_EXPR
, DefargBeingCompiled()
? &diagDefarg : &diagReturn );
}
#endif
}
static PTREE convertVaStart( // CONVERT va_start function call
PTREE expr, // - expression
arg_list *alist, // - arguments for caller
TYPE type ) // - function type
{
PTREE arg;
arg_list *plist; // - prototype arguments
PTREE right; // - right operand
if( alist->num_args != 3 ) {
return expr;
}
plist = TypeArgList( type );
// va_list symbol
arg = expr->u.subtree[1];
if( ! arg_convert( arg, plist->type_list[0] ) ) {
PTreeErrorNode( expr );
return expr;
}
// second argument -- must be parameter to current function
// - here we check for symbol
// - we check that it is a parameter in transformVaStart
arg = arg->u.subtree[0];
right = PTreeOp( &arg->u.subtree[1] );
if( right->op != PT_SYMBOL ) {
if( ! canCoaxVAStartSym( &arg->u.subtree[1] ) ) {
PTreeErrorExpr( expr, ERR_INVALID_VASTART_SYMBOL );
return expr;
}
}
// third argument -- must be 0 or one
arg = arg->u.subtree[0];
right = PTreeOp( &arg->u.subtree[1] );
if( right->op != PT_INT_CONSTANT ) {
PTreeErrorExpr( expr, ERR_INVALID_VASTART_SYMBOL );
return expr;
}
return expr;
}
PTREE CopyOptimize // COPY OPTIMIZATION
( PTREE right // - base source operand (function call)
, PTREE src // - original source operand
, PTREE left // - target operand
, PTREE dtor // - NULL or CO_DTOR expression
, CALL_OPT opt ) // - type of optimization
{
PTREE expr; // - resultant expression
PTREE parm; // - parameter node to be replaced
switch( opt ) {
case CALL_OPT_NONE :
DbgVerify( 0, "CopyOptimize -- CALL_OPT_NONE" );
break;
case CALL_OPT_CTOR :
for( parm = right->u.subtree[1]
; 0 == ( parm->flags & PTF_ARG_THIS )
; parm = parm->u.subtree[0] ) ;
expr = doCopyElimination( parm, src, left, dtor );
break;
case CALL_OPT_FUN_CALL :
for( parm = right->u.subtree[1]
; 0 == ( parm->flags & PTF_ARG_RETURN )
; parm = parm->u.subtree[0] ) ;
expr = doCopyElimination( parm, src, left, dtor );
break;
case CALL_OPT_BIN_COPY :
expr = doCopySubstitution( &right->u.subtree[0], src, left, dtor );
break;
case CALL_OPT_ERR :
PTreeErrorNode( left );
NodeFreeDupedExpr( src );
expr = left;
break;
DbgDefault( "CopyOptimize -- impossible optimization" );
}
return expr;
}
PTREE AnalyseCall( // ANALYSIS FOR CALL
PTREE expr, // - call expression
CALL_DIAG *diagnostic ) // - diagnostics used for function problems
{
PTREE *r_args; // - reference( arguments )
PTREE *r_func; // - reference( function )
PTREE *ptlist; // - nodes for arguments
PTREE left; // - left operand ( the function )
PTREE right; // - right operand ( the arguments )
PTREE this_node; // - node for "this" computation
PTREE deref_args; // - member pointer dereference args
PTREE last_arg; // - last argument
PTREE static_fn_this; // - "this" for a static member
PTREE templ_args; // - explicit template arguments
SYMBOL sym; // - function symbol
SYMBOL caller_sym; // - function that is doing the call
TYPE type; // - temporary type
TYPE fn_type; // - function type
type_flag fn_mod; // - function modifier flags
unsigned count; // - # args, caller
arg_list *alist; // - arg_list for caller
intrinsic_mapping *intr_map;// - mapping for intrinsic function
SEARCH_RESULT *result; // - searching result
boolean membptr_deref; // - TRUE ==> member pointer dereference
boolean has_ellipsis; // - TRUE ==> ellipsis in argument list
boolean virtual_call; // - TRUE ==> virtual call
TEMP_PT_LIST default_list; // - default PTREE list
TEMP_ARG_LIST default_args; // - default arg_list
FNOV_DIAG fnov_diag; // - diagnosis information;
r_args = PTreeRefRight( expr );
last_arg = *r_args;
right = NodeReverseArgs( &count, last_arg );
*r_args = right;
r_func = PTreeRefLeft( expr );
left = *r_func;
membptr_deref = FALSE;
this_node = NULL;
intr_map = NULL;
static_fn_this = NULL;
virtual_call = FALSE;
switch( left->cgop ) {
case CO_DOT:
case CO_ARROW:
this_node = left->u.subtree[0];
left->u.subtree[0] = NULL;
left = NodePruneTop( left );
*r_func = left;
r_func = PTreeRefLeft( expr );
left = *r_func;
if( ( left->op == PT_ID ) && ( left->cgop == CO_NAME_DTOR ) ) {
/* dtor of a non-class type */
left = NodePruneTop( *r_func );
/* NYI: verify dtor call has no arguments */
expr->u.subtree[0] = NULL;
NodeFreeDupedExpr( expr );
expr = NodeConvert( GetBasicType( TYP_VOID ), this_node );
expr = NodeComma( expr, left );
return( expr );
}
break;
case CO_CALL_EXEC_IND:
if( left->flags & PTF_CALLED_ONLY ) {
/* member pointer dereference being called */
deref_args = left->u.subtree[1];
this_node = NodeDupExpr( &(deref_args->u.subtree[1]) );
membptr_deref = TRUE;
}
break;
}
alist = ArgListTempAlloc( &default_args, count );
ptlist = PtListAlloc( default_list, count );
NodeBuildArgList( alist, ptlist, right, count );
if( this_node == NULL ) {
alist->qualifier = FunctionThisQualifier();
} else {
alist->qualifier = BaseTypeClassFlags( NodeType( this_node ) );
}
if( NodeIsBinaryOp( left, CO_TEMPLATE ) ) {
DbgAssert( left->u.subtree[0]->op == PT_SYMBOL );
templ_args = left->u.subtree[1];
left->u.subtree[1] = NULL;
left = NodePruneTop( left );
*r_func = left;
r_func = PTreeRefLeft( expr );
left = *r_func;
} else {
templ_args = NULL;
}
if( left->op == PT_SYMBOL ) {
FNOV_RESULT ovret;
SYMBOL orig; // - original symbol
sym = left->u.symcg.symbol;
orig = sym;
if( left->cgop == CO_NAME_CONVERT ) {
ovret = UdcOverloadedDiag( &sym
, left->u.symcg.result
, sym
, SymFuncReturnType( sym )
, alist->qualifier
, &fnov_diag );
} else {
ovret = FuncOverloadedDiag( &sym
, left->u.symcg.result
, sym
, alist
, ptlist
, templ_args
, &fnov_diag );
}
switch( ovret ) {
case FNOV_AMBIGUOUS :
CallDiagAmbiguous( expr, diagnostic->msg_ambiguous, &fnov_diag );
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
case FNOV_NO_MATCH :
if( this_node == NULL ) {
if( SymIsThisFuncMember( orig ) ) {
this_node = NodeThisCopyLocation( left );
}
}
if( this_node != NULL ) {
if( ( ! SymIsCtor( orig ) )
&&( ! SymIsDtor( orig ) )
&&( CNV_OK != AnalysePtrCV
( this_node
, TypeThisSymbol( orig
, this_node->flags & PTF_LVALUE )
, NodeType( this_node )
, CNV_FUNC_THIS ) ) ) {
PTreeErrorNode( expr );
InfSymbolDeclaration( orig );
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
}
}
CallDiagNoMatch( expr
, diagnostic->msg_no_match_one
, diagnostic->msg_no_match_many
, this_node
, orig
, &fnov_diag );
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
}
FnovFreeDiag( &fnov_diag );
left->u.symcg.symbol = sym;
result = left->u.symcg.result;
if( this_node == NULL ) {
if( SymIsThisFuncMember( sym ) ) {
if( result->use_this ) {
this_node = NodeThisCopyLocation( left );
if( this_node == NULL ) {
PTreeErrorExpr( expr, ERR_INVALID_NONSTATIC_ACCESS );
InfSymbolDeclaration( sym );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
}
} else {
PTreeErrorExpr( expr, ERR_BARE_FUNCTION_ACCESS );
InfSymbolDeclaration( sym );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
}
}
}
if( ! AnalyseSymbolAccess( expr, left, this_node, &diagAccess ) ) {
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return( expr );
}
type = sym->sym_type;
fn_type = TypeGetActualFlags( type, &fn_mod );
if( fn_type->flag & TF1_INTRINSIC ) {
intr_map = intrinsicMapping( sym );
if( intr_map == NULL ) {
outputCallTriggeredWarning( expr, sym );
}
}
if( fn_mod & TF1_FAR16 ) {
/* we are calling a far16 function */
caller_sym = ScopeFunctionInProgress();
caller_sym->flag |= SF_FAR16_CALLER;
}
left->type = type;
if( this_node == NULL ) {
if( SymIsThisFuncMember( sym ) ) {
this_node = NodeThisCopyLocation( left );
}
} else {
if( SymIsStaticFuncMember( sym ) ) {
#ifdef OLD_STATIC_MEMBER_ACCESS
NodeFreeDupedExpr( this_node );
#else
static_fn_this = this_node;
#endif
this_node = NULL;
}
}
if( this_node != NULL ) {
TYPE pted;
pted = TypePointedAtModified( this_node->type );
if( pted == NULL ) {
pted = this_node->type;
}
if( TypeTruncByMemModel( pted ) ) {
if( SymIsCtor( sym ) ) {
PTreeErrorExpr( this_node, ERR_CTOR_OBJ_MEM_MODEL );
} else if( SymIsDtor( sym ) ) {
PTreeErrorExpr( this_node, ERR_DTOR_OBJ_MEM_MODEL );
} else {
PTreeErrorExpr( this_node, ERR_THIS_OBJ_MEM_MODEL );
}
InfSymbolDeclaration( sym );
PTreeErrorNode( expr );
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
NodeFreeDupedExpr( static_fn_this );
return( expr );
}
if( adjustForVirtualCall( &this_node, r_func, result ) ) {
virtual_call = TRUE;
expr->cgop = CO_CALL_EXEC_IND;
left = VfunSetupCall( expr->u.subtree[0] );
left = VfnDecorateCall( left, sym );
} else {
expr->cgop = CO_CALL_EXEC;
left = NodeUnaryCopy( CO_CALL_SETUP, expr->u.subtree[0] );
SymMarkRefed( sym );
}
} else {
NodeFreeSearchResult( left );
expr->cgop = CO_CALL_EXEC;
left = NodeUnaryCopy( CO_CALL_SETUP, expr->u.subtree[0] );
SymMarkRefed( sym );
}
} else {
if( ! membptr_deref ) {
/* i.e, p->foo() where foo is a pointer to a function */
NodeFreeDupedExpr( this_node );
this_node = NULL;
}
sym = NULL;
left = expr->u.subtree[0];
type = TypedefModifierRemove( left->type );
if( type->id == TYP_POINTER ) {
type = type->of;
}
fn_type = TypeGetActualFlags( type, &fn_mod );
if( fn_mod & TF1_FAR16 ) {
/* we are calling a far16 function */
caller_sym = ScopeFunctionInProgress();
caller_sym->flag |= SF_FAR16_CALLER;
}
if( ! TypeHasNumArgs( type, count ) ) {
PTreeErrorExpr( expr, ERR_PARM_COUNT_MISMATCH_POINTER );
CErr2p( INF_FUNCTION_TYPE, type );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
NodeFreeDupedExpr( static_fn_this );
return( expr );
}
expr->cgop = CO_CALL_EXEC_IND;
left = VfunSetupCall( left );
}
expr->u.subtree[0] = left;
#if _CPU == _AXP
if( intr_map != NULL && intr_map->cgop == CO_VASTART ) {
expr = convertVaStart( expr, alist, type );
} else {
expr = NodeConvertCallArgList( expr, count, type, &expr->u.subtree[1] );
}
#else
expr = NodeConvertCallArgList( expr, count, type, &expr->u.subtree[1] );
#endif
if( expr->op != PT_ERROR ) {
TYPE ftype; // - function type
PTREE cdtor; // - CDTOR node
PTREE callnode; // - call node
PTREE retnnode; // - return node (for struct return)
callnode = expr;
if( this_node == NULL ) {
cdtor = NULL;
} else {
this_node = NodeArg( this_node );
if( virtual_call ) {
this_node->flags |= PTF_ARG_THIS_VFUN;
}
if( sym != NULL && SymIsDtor( sym ) ) {
cdtor = NodeArg( NodeCDtorArg( DTOR_NULL ) );
} else {
cdtor = NULL;
}
}
ftype = type;
type = TypedefModifierRemove( type );
has_ellipsis = TypeHasEllipsisArg( type );
type = type->of;
{
TYPE tgt = TypeReference( type );
if( tgt == NULL ) {
expr->type = type;
} else {
expr->type = tgt;
expr->flags |= PTF_LVALUE;
}
}
if( sym != NULL ) {
if( ! AddDefaultArgs( sym, expr ) ) {
NodeFreeDupedExpr( cdtor );
NodeFreeDupedExpr( this_node );
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return expr;
}
}
if( NULL != TypeReference( type ) ) {
expr->flags |= PTF_LVALUE;
}
if( OMR_CLASS_REF == ObjModelArgument( type ) ) {
retnnode = NodeTemporary( type );
retnnode = PTreeCopySrcLocation( retnnode, expr );
} else {
retnnode = NULL;
}
expr = CallArgsArrange( ftype
, callnode
, callnode->u.subtree[1]
, this_node
, cdtor
, retnnode );
if( retnnode != NULL ) {
expr = NodeDtorExpr( expr, retnnode->u.symcg.symbol );
if( SymRequiresDtoring( retnnode->u.symcg.symbol ) ) {
expr = PtdCtoredExprType( expr, NULL, type );
}
}
type = StructType( type );
if( type != NULL && ! TypeDefined( type ) ) {
PTreeErrorExpr( expr, ERR_RETURN_UNDEFD_TYPE );
}
if( intr_map != NULL && expr->op != PT_ERROR ) {
#if _CPU == _AXP
if( intr_map->cgop == CO_VASTART ) {
expr = transformVaStart( expr );
} else {
expr = PTreeIntrinsicOperator( expr, intr_map->cgop );
}
#else
expr = PTreeIntrinsicOperator( expr, intr_map->cgop );
#endif
expr->flags |= PTF_MEANINGFUL | PTF_SIDE_EFF;
}
}
if( static_fn_this != NULL ) {
expr = NodeCommaIfSideEffect( static_fn_this, expr );
}
ArgListTempFree( alist, count );
PtListFree( ptlist, count );
return expr;
}
PTREE NodeConvertCallArgList( // CONVERT CALL ARGUMENT LIST, AS REQ'D
PTREE call_expr, // - call expression (for errors only)
unsigned acount, // - # args, caller
TYPE type, // - function type
PTREE *args ) // - addr( caller argument nodes )
{
PTREE arg; // - caller argument nodes
arg_list *plist; // - prototype arguments
unsigned count; // - # args, processed
unsigned pcount; // - # args, prototype
TYPE *pptr; // - prototype type ptr.
TYPE proto; // - prototype arg. type
boolean extern_c_fun; // - TRUE ==> extern "C" function
TEMP_TYPE old; // - old default class for temp.s
if( call_expr != NULL
&& call_expr->op != PT_ERROR
&& acount > 0 ) {
old = TemporaryClass( TEMP_TYPE_EXPR );
plist = TypeArgList( type );
pptr = plist->type_list;
pcount = plist->num_args;
type = FunctionDeclarationType( type );
if( TypeHasEllipsisArg( type ) ) {
for( count = 1
; count <= acount
; ++count, args = &arg->u.subtree[0] ) {
arg = PTreeOp( args );
if( ! ( count < pcount
? arg_convert( arg, *pptr++ )
: convertEllipsisArg( arg ) ) ) {
PTreeErrorNode( call_expr );
break;
}
}
} else {
if( type->flag & TF1_PLUSPLUS ) {
extern_c_fun = FALSE;
} else {
extern_c_fun = TRUE;
}
for( count = 1
; count <= acount
; ++count, args = &arg->u.subtree[0] ) {
TYPE cl_type;
arg = PTreeOp( args );
proto = *pptr++;
if( ! arg_convert( arg, proto ) ) {
PTreeErrorNode( call_expr );
break;
}
cl_type = StructType( proto );
if( NULL != cl_type ) {
if( extern_c_fun ) {
if( ! passStructOnStack( arg
, WARN_EXTERN_C_CLASS_ARG ) ) {
PTreeErrorNode( call_expr );
break;
}
} else if( OMR_CLASS_VAL
== ObjModelArgument( cl_type ) ) {
passStructOnStack( arg, ERR_CALL_WATCOM );
}
}
}
}
TemporaryClass( old );
}
return( call_expr );
}
