static void declareParameter( // DEFINE A FUNCTION PARAMETER
SYMBOL sym ) // - the parameter
{
cg_type cgtype; // - type for code generator
FN_CTL* fctl; // - function information
TYPE ftype; // - function type
if( sym != NULL ) {
fctl = FnCtlTop();
ftype = FunctionDeclarationType( fctl->func->sym_type );
sym = inlineSymbol( sym );
if( ( TF1_PLUSPLUS & ftype->flag )
&& OMR_CLASS_REF == ObjModelArgument( sym->sym_type ) ) {
cgtype = TY_POINTER;
} else {
cgtype = CgTypeOutput( sym->sym_type );
}
CGParmDecl( (cg_sym_handle)sym, cgtype );
if( fctl->debug_info
&& ( GenSwitches & DBG_LOCALS ) ) {
if( GenSwitches & DBG_DF ){
DwarfSymDebugGenSymbol( sym, true, cgtype == TY_POINTER );
}else{
SymbolicDebugGenSymbol( sym, true, cgtype == TY_POINTER );
}
}
IbpDefineSym( fctl->handle, sym );
}
}
void CgSetType( // SET NORMAL TYPE FOR GENERATION
TYPE type ) // - the type
{
if( OMR_CLASS_REF == ObjModelArgument( type ) ) {
type = MakeReferenceTo( type );
}
CgSetTypeExact( type );
}
cg_type CgTypeSym( // COMPUTE OUTPUT TYPE FOR SYMBOL
SYMBOL sym ) // - the symbol
{
TYPE type = sym->sym_type;
if( SymIsArgument( sym )
&& NULL != StructType( type )
&& OMR_CLASS_REF == ObjModelArgument( type ) ) {
type = MakeReferenceTo( type );
}
return CgTypeOutput( type );
}
cg_type CgGetCgType( // GET CODEGEN TYPE
TYPE type ) // - type
{
TYPE basic; // - basic type
cg_type cgtype; // - codegen type
basic = TypedefModifierRemove( type );
if( basic->id == TYP_CLASS ) {
if( OMR_CLASS_VAL == ObjModelArgument( basic ) ) {
cgtype = prcCgType( CgTypeOutput( type ) );
} else {
cgtype = TY_POINTER;
}
} else {
cgtype = prcCgType( CgTypeOutput( type ) );
}
return cgtype;
}
static boolean adjustForVirtualCall( // ADJUSTMENTS FOR POSSIBLE VIRTUAL CALL
PTREE *this_node, // - addr[ "this" node ]
PTREE *routine, // - routine to be called
SEARCH_RESULT *result ) // - search result for routine
{
SYMBOL sym; // - symbol for call
unsigned retn; // - return: TRUE ==> adjusted for virtual
TYPE this_type; // - target type for "this"
PTREE expr; // - transformed expression
boolean exact_call; // - TRUE ==> this node is exact
expr = *this_node;
this_type = NodeType( expr );
this_type = StructType( this_type );
if( this_type != NULL ) {
if( OMR_CLASS_VAL == ObjModelArgument( this_type ) ) {
expr = NodeAssignTemporary( this_type, expr );
} else {
expr = NodeConvert( MakePointerTo( expr->type ), expr );
}
*this_node = expr;
}
sym = (*routine)->u.symcg.symbol;
this_type = TypeThisForCall( expr, sym );
/* virtual calls don't have to check for NULL pointers when they convert */
expr->flags |= PTF_PTR_NONZERO;
exact_call = expr->flags & PTF_MEMORY_EXACT;
NodeConvertToBasePtr( this_node, this_type, result, TRUE );
sym = SymDefaultBase( sym );
if( ( SymIsVirtual( sym ) )
&&( ! ( (*routine)->flags & PTF_COLON_QUALED ) )
&&( ! exact_call ) ) {
expr = AccessVirtualFnAddress( NodeDupExpr( this_node )
, result
, sym );
expr->type = MakePointerTo( expr->type );
*routine = NodeReplace( *routine, expr );
retn = TRUE;
} else {
NodeFreeSearchResult( *routine );
retn = FALSE;
}
return( retn );
}
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;
}
static PTREE transformVaStart // TRANSFORM TO CO_VASTART OPCODE
( PTREE expr ) // - va_start expression
{
SYMBOL pre_ellipsis_sym;
SYMBOL stop;
SYMBOL curr;
SYMBOL fn;
SCOPE caller_arg_scope;
unsigned offset;
target_size_t arg_size;
PTREE arg1;
PTREE arg2;
PTREE arg3;
PTREE valist;
// second argument -- must be pre-... parameter
arg1 = expr->u.subtree[1];
arg2 = arg1->u.subtree[0];
arg3 = arg2->u.subtree[0];
pre_ellipsis_sym = PTreeOp( &arg2->u.subtree[1] )->u.symcg.symbol;
caller_arg_scope = ScopeFunctionScopeInProgress();
fn = ScopeFunction( caller_arg_scope );
offset = 0;
if( ObjModelFunctionReturn( fn->sym_type ) == OMR_CLASS_VAL ) {
offset += TARGET_PACKING;
}
if( SymIsThisMember( fn ) ) {
offset += TARGET_PACKING;
if( SymCDtorExtraParm( fn ) ) {
offset += TARGET_PACKING;
}
}
stop = ScopeOrderedStart( caller_arg_scope );
curr = NULL;
for(;;) {
curr = ScopeOrderedNext( stop, curr );
if( curr == NULL ) {
PTreeErrorExpr( expr, ERR_INVALID_VASTART_SYMBOL );
return( expr );
}
if( ObjModelArgument( curr->sym_type ) == OMR_CLASS_REF ) {
arg_size = TARGET_PACKING;
} else {
arg_size = CgMemorySize( curr->sym_type );
arg_size += TARGET_PACKING - 1;
arg_size &= ~( TARGET_PACKING - 1 );
}
offset += arg_size;
if( curr == pre_ellipsis_sym ) break;
}
if( ScopeOrderedNext( stop, curr ) != NULL ) {
PTreeErrorExpr( expr, ERR_INVALID_VASTART_SYMBOL );
return( expr );
}
// third argument -- va_list symbol
valist = arg1->u.subtree[1];
arg1->u.subtree[1] = NULL;
if( arg3->u.subtree[1]->u.int_constant == 0 ) {
// compensate for "void *__alist;" arg in <varargs.h>
offset -= TARGET_PACKING;
}
NodeFreeDupedExpr( expr );
expr = NodeBinary( CO_VASTART, valist, NodeOffset( offset ) );
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 );
}
