mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-10-31 02:51:37 +01:00
6b8aed593f
* small cleanups of unused variables in firstpass
* node_resources_fpu() created to get an approximation of the
required fpu registers
* for the moment use node_complexity in the CG until the
node_resource_int() is created
git-svn-id: trunk@8655 -
3134 lines
124 KiB
ObjectPascal
3134 lines
124 KiB
ObjectPascal
{
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This file implements the node for sub procedure calling.
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Copyright (c) 1998-2002 by Florian Klaempfl
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit ncal;
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{$i fpcdefs.inc}
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interface
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uses
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cutils,cclasses,
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globtype,constexp,
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paramgr,parabase,
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node,nbas,nutils,
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{$ifdef state_tracking}
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nstate,
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{$endif state_tracking}
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symbase,symtype,symsym,symdef,symtable;
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type
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tcallnodeflag = (
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cnf_typedefset,
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cnf_return_value_used,
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cnf_do_inline,
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cnf_inherited,
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cnf_anon_inherited,
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cnf_new_call,
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cnf_dispose_call,
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cnf_member_call, { called with implicit methodpointer tree }
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cnf_uses_varargs, { varargs are used in the declaration }
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cnf_create_failed { exception thrown in constructor -> don't call beforedestruction }
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);
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tcallnodeflags = set of tcallnodeflag;
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tcallparanode = class;
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tcallnode = class(tbinarynode)
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private
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{ number of parameters passed from the source, this does not include the hidden parameters }
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paralength : smallint;
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function is_simple_para_load(p:tnode):boolean;
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procedure maybe_load_in_temp(var p:tnode);
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function gen_high_tree(var p:tnode;paradef:tdef):tnode;
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function gen_self_tree_methodpointer:tnode;
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function gen_self_tree:tnode;
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function gen_vmt_tree:tnode;
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procedure gen_hidden_parameters;
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procedure maybe_create_funcret_node;
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procedure bind_parasym;
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procedure add_init_statement(n:tnode);
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procedure add_done_statement(n:tnode);
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procedure convert_carg_array_of_const;
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procedure order_parameters;
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procedure check_inlining;
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function pass1_normal:tnode;
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{ inlining support }
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inlinelocals : TFPObjectList;
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inlineinitstatement,
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inlinecleanupstatement : tstatementnode;
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procedure createinlineparas;
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function replaceparaload(var n: tnode; arg: pointer): foreachnoderesult;
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procedure createlocaltemps(p:TObject;arg:pointer);
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function optimize_funcret_assignment(inlineblock: tblocknode): tnode;
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function pass1_inline:tnode;
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protected
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pushedparasize : longint;
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{ function return node for initialized types or supplied return variable.
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When the result is passed in a parameter then it is set to nil }
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funcretnode : tnode;
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public
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{ the symbol containing the definition of the procedure }
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{ to call }
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symtableprocentry : tprocsym;
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symtableprocentryderef : tderef;
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{ symtable where the entry was found, needed for with support }
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symtableproc : TSymtable;
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{ the definition of the procedure to call }
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procdefinition : tabstractprocdef;
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procdefinitionderef : tderef;
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{ tree that contains the pointer to the object for this method }
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methodpointer : tnode;
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{ initialize/finalization of temps }
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callinitblock,
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callcleanupblock : tblocknode;
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{ varargs parasyms }
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varargsparas : tvarargsparalist;
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{ separately specified resultdef for some compilerprocs (e.g. }
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{ you can't have a function with an "array of char" resultdef }
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{ the RTL) (JM) }
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typedef: tdef;
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callnodeflags : tcallnodeflags;
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{ only the processor specific nodes need to override this }
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{ constructor }
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constructor create(l:tnode; v : tprocsym;st : TSymtable; mp: tnode; callflags:tcallnodeflags);virtual;
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constructor create_procvar(l,r:tnode);
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constructor createintern(const name: string; params: tnode);
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constructor createinternres(const name: string; params: tnode; res:tdef);
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constructor createinternreturn(const name: string; params: tnode; returnnode : tnode);
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destructor destroy;override;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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procedure ppuwrite(ppufile:tcompilerppufile);override;
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procedure derefnode;override;
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procedure buildderefimpl;override;
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procedure derefimpl;override;
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function dogetcopy : tnode;override;
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{ Goes through all symbols in a class and subclasses and calls
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verify abstract for each .
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}
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procedure verifyabstractcalls;
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{ called for each definition in a class and verifies if a method
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is abstract or not, if it is abstract, give out a warning
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}
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procedure verifyabstract(sym:TObject;arg:pointer);
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procedure insertintolist(l : tnodelist);override;
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function pass_1 : tnode;override;
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function pass_typecheck:tnode;override;
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{$ifdef state_tracking}
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function track_state_pass(exec_known:boolean):boolean;override;
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{$endif state_tracking}
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function docompare(p: tnode): boolean; override;
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procedure printnodedata(var t:text);override;
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function para_count:longint;
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{ checks if there are any parameters which end up at the stack, i.e.
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which have LOC_REFERENCE and set pi_has_stackparameter if this applies }
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procedure check_stack_parameters;
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property parameters : tnode read left write left;
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private
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AbstractMethodsList : TFPHashList;
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end;
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tcallnodeclass = class of tcallnode;
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tcallparaflag = (
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cpf_is_colon_para,
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cpf_varargs_para { belongs this para to varargs }
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);
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tcallparaflags = set of tcallparaflag;
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tcallparanode = class(ttertiarynode)
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public
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callparaflags : tcallparaflags;
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parasym : tparavarsym;
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{ only the processor specific nodes need to override this }
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{ constructor }
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constructor create(expr,next : tnode);virtual;
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destructor destroy;override;
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constructor ppuload(t:tnodetype;ppufile:tcompilerppufile);override;
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procedure ppuwrite(ppufile:tcompilerppufile);override;
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function dogetcopy : tnode;override;
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procedure insertintolist(l : tnodelist);override;
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function pass_typecheck : tnode;override;
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function pass_1 : tnode;override;
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procedure get_paratype;
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procedure firstcallparan;
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procedure insert_typeconv(do_count : boolean);
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procedure secondcallparan;virtual;abstract;
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function docompare(p: tnode): boolean; override;
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procedure printnodetree(var t:text);override;
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{ returns whether a parameter contains a type conversion from }
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{ a refcounted into a non-refcounted type }
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function contains_unsafe_typeconversion: boolean;
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property nextpara : tnode read right write right;
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property parametername : tnode read third write third;
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end;
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tcallparanodeclass = class of tcallparanode;
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function reverseparameters(p: tcallparanode): tcallparanode;
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function translate_disp_call(selfnode,parametersnode : tnode;methodname : ansistring = '';dispid : longint = 0;useresult : boolean = false) : tnode;
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var
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ccallnode : tcallnodeclass;
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ccallparanode : tcallparanodeclass;
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{ Current callnode, this is needed for having a link
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between the callparanodes and the callnode they belong to }
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aktcallnode : tcallnode;
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implementation
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uses
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systems,
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verbose,globals,
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symconst,defutil,defcmp,
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htypechk,pass_1,
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ncnv,nld,ninl,nadd,ncon,nmem,nset,
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procinfo,
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cgbase
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;
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type
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tobjectinfoitem = class(tlinkedlistitem)
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objinfo : tobjectdef;
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constructor create(def : tobjectdef);
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end;
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{****************************************************************************
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HELPERS
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****************************************************************************}
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function reverseparameters(p: tcallparanode): tcallparanode;
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var
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hp1, hp2: tcallparanode;
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begin
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hp1:=nil;
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while assigned(p) do
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begin
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{ pull out }
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hp2:=p;
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p:=tcallparanode(p.right);
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{ pull in }
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hp2.right:=hp1;
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hp1:=hp2;
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end;
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reverseparameters:=hp1;
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end;
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function translate_disp_call(selfnode,parametersnode : tnode;methodname : ansistring = '';dispid : longint = 0;useresult : boolean = false) : tnode;
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const
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DISPATCH_METHOD = $1;
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DISPATCH_PROPERTYGET = $2;
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DISPATCH_PROPERTYPUT = $4;
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DISPATCH_PROPERTYPUTREF = $8;
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DISPATCH_CONSTRUCT = $4000;
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var
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statements : tstatementnode;
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result_data,
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params : ttempcreatenode;
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paramssize : cardinal;
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calldescnode : tdataconstnode;
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resultvalue : tnode;
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para : tcallparanode;
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currargpos,
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namedparacount,
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paracount : longint;
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assignmenttype,
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vardatadef,
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pvardatadef : tdef;
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dispatchbyref : boolean;
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calldesc : packed record
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calltype,argcount,namedargcount : byte;
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{ size of argtypes is unknown at compile time
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so this is basically a dummy }
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argtypes : array[0..255] of byte;
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{ argtypes is followed by method name
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names of named parameters, each being
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a zero terminated string
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}
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end;
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names : ansistring;
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dispintfinvoke,
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variantdispatch : boolean;
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procedure increase_paramssize;
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begin
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{ for now we pass everything by reference
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case para.left.resultdef.typ of
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variantdef:
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inc(paramssize,para.left.resultdef.size);
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else
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}
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inc(paramssize,sizeof(voidpointertype.size));
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{
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end;
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}
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end;
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begin
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variantdispatch:=selfnode.resultdef.typ=variantdef;
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dispintfinvoke:=not(variantdispatch);
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result:=internalstatements(statements);
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fillchar(calldesc,sizeof(calldesc),0);
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if useresult then
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begin
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{ get temp for the result }
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result_data:=ctempcreatenode.create(colevarianttype,colevarianttype.size,tt_persistent,true);
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addstatement(statements,result_data);
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end;
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{ first, count and check parameters }
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para:=tcallparanode(parametersnode);
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paracount:=0;
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namedparacount:=0;
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paramssize:=0;
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while assigned(para) do
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begin
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inc(paracount);
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typecheckpass(para.left);
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{ insert some extra casts }
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if is_constintnode(para.left) and not(is_64bitint(para.left.resultdef)) then
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begin
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para.left:=ctypeconvnode.create_internal(para.left,s32inttype);
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typecheckpass(para.left);
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end
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else if para.left.nodetype=stringconstn then
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begin
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para.left:=ctypeconvnode.create_internal(para.left,cwidestringtype);
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typecheckpass(para.left);
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end
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{ force automatable boolean type }
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else if is_boolean(para.left.resultdef) then
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begin
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para.left:=ctypeconvnode.create_internal(para.left,bool16type);
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typecheckpass(para.left);
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end
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{ force automatable float type }
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else if is_extended(para.left.resultdef) then
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begin
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para.left:=ctypeconvnode.create_internal(para.left,s64floattype);
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typecheckpass(para.left);
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end;
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if assigned(para.parametername) then
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begin
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typecheckpass(para.left);
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inc(namedparacount);
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end;
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if para.left.nodetype<>nothingn then
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if not is_automatable(para.left.resultdef) then
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CGMessagePos1(para.left.fileinfo,type_e_not_automatable,para.left.resultdef.typename);
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{ we've to know the parameter size to allocate the temp. space }
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increase_paramssize;
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para:=tcallparanode(para.nextpara);
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end;
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calldesc.calltype:=DISPATCH_METHOD;
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calldesc.argcount:=paracount;
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{ allocate space }
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params:=ctempcreatenode.create(voidtype,paramssize,tt_persistent,true);
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addstatement(statements,params);
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calldescnode:=cdataconstnode.create;
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if dispintfinvoke then
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calldescnode.append(dispid,sizeof(dispid));
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{ build up parameters and description }
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para:=tcallparanode(parametersnode);
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currargpos:=0;
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paramssize:=0;
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names := '';
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while assigned(para) do
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begin
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if assigned(para.parametername) then
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begin
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if para.parametername.nodetype=stringconstn then
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names:=names+tstringconstnode(para.parametername).value_str+#0
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else
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internalerror(200611041);
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end;
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dispatchbyref:=para.left.resultdef.typ in [variantdef];
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{ assign the argument/parameter to the temporary location }
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if para.left.nodetype<>nothingn then
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if dispatchbyref then
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addstatement(statements,cassignmentnode.create(
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ctypeconvnode.create_internal(cderefnode.create(caddnode.create(addn,
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caddrnode.create(ctemprefnode.create(params)),
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cordconstnode.create(qword(paramssize),ptruinttype,false)
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)),voidpointertype),
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ctypeconvnode.create_internal(caddrnode.create_internal(para.left),voidpointertype)))
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else
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begin
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case para.left.resultdef.size of
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1..4:
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assignmenttype:=u32inttype;
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8:
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assignmenttype:=u64inttype;
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else
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internalerror(2007042801);
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end;
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addstatement(statements,cassignmentnode.create(
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ctypeconvnode.create_internal(cderefnode.create(caddnode.create(addn,
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caddrnode.create(ctemprefnode.create(params)),
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cordconstnode.create(paramssize,ptruinttype,false)
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)),assignmenttype),
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ctypeconvnode.create_internal(para.left,assignmenttype)));
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end;
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if is_ansistring(para.left.resultdef) then
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calldesc.argtypes[currargpos]:=varStrArg
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else
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calldesc.argtypes[currargpos]:=para.left.resultdef.getvardef;
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if dispatchbyref then
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calldesc.argtypes[currargpos]:=calldesc.argtypes[currargpos] or $80;
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increase_paramssize;
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para.left:=nil;
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inc(currargpos);
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para:=tcallparanode(para.nextpara);
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end;
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{ old argument list skeleton isn't needed anymore }
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parametersnode.free;
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calldescnode.append(calldesc,3+calldesc.argcount);
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pvardatadef:=tpointerdef(search_system_type('PVARDATA').typedef);
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if useresult then
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resultvalue:=caddrnode.create(ctemprefnode.create(result_data))
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else
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resultvalue:=cpointerconstnode.create(0,voidpointertype);
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if variantdispatch then
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begin
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methodname:=methodname+#0;
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calldescnode.append(pointer(methodname)^,length(methodname));
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calldescnode.append(pointer(names)^,length(names));
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{ actual call }
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vardatadef:=trecorddef(search_system_type('TVARDATA').typedef);
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addstatement(statements,ccallnode.createintern('fpc_dispinvoke_variant',
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{ parameters are passed always reverted, i.e. the last comes first }
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ccallparanode.create(caddrnode.create(ctemprefnode.create(params)),
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ccallparanode.create(caddrnode.create(calldescnode),
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ccallparanode.create(ctypeconvnode.create_internal(selfnode,vardatadef),
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ccallparanode.create(ctypeconvnode.create_internal(resultvalue,pvardatadef),nil)))))
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);
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end
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else
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begin
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addstatement(statements,ccallnode.createintern('fpc_dispatch_by_id',
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{ parameters are passed always reverted, i.e. the last comes first }
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ccallparanode.create(caddrnode.create(ctemprefnode.create(params)),
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ccallparanode.create(caddrnode.create(calldescnode),
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ccallparanode.create(ctypeconvnode.create_internal(selfnode,voidpointertype),
|
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ccallparanode.create(ctypeconvnode.create_internal(resultvalue,pvardatadef),nil)))))
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);
|
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end;
|
|
if useresult then
|
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begin
|
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{ clean up }
|
|
addstatement(statements,ctempdeletenode.create_normal_temp(result_data));
|
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addstatement(statements,ctemprefnode.create(result_data));
|
|
end;
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
TOBJECTINFOITEM
|
|
****************************************************************************}
|
|
|
|
constructor tobjectinfoitem.create(def : tobjectdef);
|
|
begin
|
|
inherited create;
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|
objinfo := def;
|
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end;
|
|
|
|
|
|
{****************************************************************************
|
|
TCALLPARANODE
|
|
****************************************************************************}
|
|
|
|
constructor tcallparanode.create(expr,next : tnode);
|
|
|
|
begin
|
|
inherited create(callparan,expr,next,nil);
|
|
if not assigned(expr) then
|
|
internalerror(200305091);
|
|
expr.fileinfo:=fileinfo;
|
|
callparaflags:=[];
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|
end;
|
|
|
|
destructor tcallparanode.destroy;
|
|
|
|
begin
|
|
inherited destroy;
|
|
end;
|
|
|
|
|
|
constructor tcallparanode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuload(t,ppufile);
|
|
ppufile.getsmallset(callparaflags);
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.putsmallset(callparaflags);
|
|
end;
|
|
|
|
|
|
function tcallparanode.dogetcopy : tnode;
|
|
|
|
var
|
|
n : tcallparanode;
|
|
|
|
begin
|
|
n:=tcallparanode(inherited dogetcopy);
|
|
n.callparaflags:=callparaflags;
|
|
n.parasym:=parasym;
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.insertintolist(l : tnodelist);
|
|
begin
|
|
end;
|
|
|
|
|
|
function tcallparanode.pass_typecheck : tnode;
|
|
begin
|
|
{ need to use get_paratype }
|
|
internalerror(200709251);
|
|
result:=nil;
|
|
end;
|
|
|
|
|
|
function tcallparanode.pass_1 : tnode;
|
|
begin
|
|
{ need to use firstcallparan }
|
|
internalerror(200709252);
|
|
result:=nil;
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.get_paratype;
|
|
var
|
|
old_array_constructor : boolean;
|
|
begin
|
|
if assigned(right) then
|
|
tcallparanode(right).get_paratype;
|
|
old_array_constructor:=allow_array_constructor;
|
|
allow_array_constructor:=true;
|
|
typecheckpass(left);
|
|
allow_array_constructor:=old_array_constructor;
|
|
if codegenerror then
|
|
resultdef:=generrordef
|
|
else
|
|
resultdef:=left.resultdef;
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.firstcallparan;
|
|
begin
|
|
if assigned(right) then
|
|
tcallparanode(right).firstcallparan;
|
|
if not assigned(left.resultdef) then
|
|
get_paratype;
|
|
firstpass(left);
|
|
expectloc:=left.expectloc;
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.insert_typeconv(do_count : boolean);
|
|
var
|
|
olddef : tdef;
|
|
hp : tnode;
|
|
begin
|
|
{ Be sure to have the resultdef }
|
|
if not assigned(left.resultdef) then
|
|
typecheckpass(left);
|
|
|
|
if (left.nodetype<>nothingn) then
|
|
begin
|
|
{ Convert tp procvars, this is needs to be done
|
|
here to make the change permanent. in the overload
|
|
choosing the changes are only made temporary }
|
|
if (left.resultdef.typ=procvardef) and
|
|
(parasym.vardef.typ<>procvardef) then
|
|
begin
|
|
if maybe_call_procvar(left,true) then
|
|
resultdef:=left.resultdef;
|
|
end;
|
|
|
|
{ Remove implicitly inserted typecast to pointer for
|
|
@procvar in macpas }
|
|
if (m_mac_procvar in current_settings.modeswitches) and
|
|
(parasym.vardef.typ=procvardef) and
|
|
(left.nodetype=typeconvn) and
|
|
is_voidpointer(left.resultdef) and
|
|
(ttypeconvnode(left).left.nodetype=typeconvn) and
|
|
(ttypeconvnode(ttypeconvnode(left).left).convtype=tc_proc_2_procvar) then
|
|
begin
|
|
hp:=left;
|
|
left:=ttypeconvnode(left).left;
|
|
ttypeconvnode(hp).left:=nil;
|
|
hp.free;
|
|
end;
|
|
|
|
{ Handle varargs and hidden paras directly, no typeconvs or }
|
|
{ pass_typechecking needed }
|
|
if (cpf_varargs_para in callparaflags) then
|
|
begin
|
|
{ this should only happen vor C varargs }
|
|
{ the necessary conversions have already been performed in }
|
|
{ tarrayconstructornode.insert_typeconvs }
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
insert_varargstypeconv(left,true);
|
|
resultdef:=left.resultdef;
|
|
{ also update parasym type to get the correct parameter location
|
|
for the new types }
|
|
parasym.vardef:=left.resultdef;
|
|
end
|
|
else
|
|
if (vo_is_hidden_para in parasym.varoptions) then
|
|
begin
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
resultdef:=left.resultdef;
|
|
end
|
|
else
|
|
begin
|
|
|
|
{ Do we need arrayconstructor -> set conversion, then insert
|
|
it here before the arrayconstructor node breaks the tree
|
|
with its conversions of enum->ord }
|
|
if (left.nodetype=arrayconstructorn) and
|
|
(parasym.vardef.typ=setdef) then
|
|
inserttypeconv(left,parasym.vardef);
|
|
|
|
{ set some settings needed for arrayconstructor }
|
|
if is_array_constructor(left.resultdef) then
|
|
begin
|
|
if left.nodetype<>arrayconstructorn then
|
|
internalerror(200504041);
|
|
if is_array_of_const(parasym.vardef) then
|
|
begin
|
|
{ force variant array }
|
|
include(left.flags,nf_forcevaria);
|
|
end
|
|
else
|
|
begin
|
|
include(left.flags,nf_novariaallowed);
|
|
{ now that the resultting type is know we can insert the required
|
|
typeconvs for the array constructor }
|
|
if parasym.vardef.typ=arraydef then
|
|
tarrayconstructornode(left).force_type(tarraydef(parasym.vardef).elementdef);
|
|
end;
|
|
end;
|
|
|
|
{ check if local proc/func is assigned to procvar }
|
|
if left.resultdef.typ=procvardef then
|
|
test_local_to_procvar(tprocvardef(left.resultdef),parasym.vardef);
|
|
|
|
{ test conversions }
|
|
if not(is_shortstring(left.resultdef) and
|
|
is_shortstring(parasym.vardef)) and
|
|
(parasym.vardef.typ<>formaldef) then
|
|
begin
|
|
{ Process open parameters }
|
|
if paramanager.push_high_param(parasym.varspez,parasym.vardef,aktcallnode.procdefinition.proccalloption) then
|
|
begin
|
|
{ insert type conv but hold the ranges of the array }
|
|
olddef:=left.resultdef;
|
|
inserttypeconv(left,parasym.vardef);
|
|
left.resultdef:=olddef;
|
|
end
|
|
else
|
|
begin
|
|
check_ranges(left.fileinfo,left,parasym.vardef);
|
|
inserttypeconv(left,parasym.vardef);
|
|
end;
|
|
if codegenerror then
|
|
exit;
|
|
end;
|
|
|
|
{ check var strings }
|
|
if (cs_strict_var_strings in current_settings.localswitches) and
|
|
is_shortstring(left.resultdef) and
|
|
is_shortstring(parasym.vardef) and
|
|
(parasym.varspez in [vs_out,vs_var]) and
|
|
not(is_open_string(parasym.vardef)) and
|
|
not(equal_defs(left.resultdef,parasym.vardef)) then
|
|
begin
|
|
current_filepos:=left.fileinfo;
|
|
CGMessage(type_e_strict_var_string_violation);
|
|
end;
|
|
|
|
{ Handle formal parameters separate }
|
|
if (parasym.vardef.typ=formaldef) then
|
|
begin
|
|
{ load procvar if a procedure is passed }
|
|
if ((m_tp_procvar in current_settings.modeswitches) or
|
|
(m_mac_procvar in current_settings.modeswitches)) and
|
|
(left.nodetype=calln) and
|
|
(is_void(left.resultdef)) then
|
|
load_procvar_from_calln(left);
|
|
|
|
case parasym.varspez of
|
|
vs_var,
|
|
vs_out :
|
|
begin
|
|
if not valid_for_formal_var(left,true) then
|
|
CGMessagePos(left.fileinfo,parser_e_illegal_parameter_list);
|
|
end;
|
|
vs_const :
|
|
begin
|
|
if not valid_for_formal_const(left,true) then
|
|
CGMessagePos(left.fileinfo,parser_e_illegal_parameter_list);
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{ check if the argument is allowed }
|
|
if (parasym.varspez in [vs_out,vs_var]) then
|
|
valid_for_var(left,true);
|
|
end;
|
|
|
|
if parasym.varspez in [vs_var,vs_out] then
|
|
set_unique(left);
|
|
|
|
{ When the address needs to be pushed then the register is
|
|
not regable. Exception is when the location is also a var
|
|
parameter and we can pass the address transparently (but
|
|
that is handled by make_not_regable if ra_addr_regable is
|
|
passed, and make_not_regable always needs to called for
|
|
the ra_addr_taken info for non-invisble parameters }
|
|
if (
|
|
not(
|
|
(vo_is_hidden_para in parasym.varoptions) and
|
|
(left.resultdef.typ in [pointerdef,classrefdef])
|
|
) and
|
|
paramanager.push_addr_param(parasym.varspez,parasym.vardef,
|
|
aktcallnode.procdefinition.proccalloption)
|
|
) then
|
|
{ pushing the address of a variable to take the place of a temp }
|
|
{ as the complex function result of a function does not make its }
|
|
{ address escape the current block, as the "address of the }
|
|
{ function result" is not something which can be stored }
|
|
{ persistently by the callee (it becomes invalid when the callee }
|
|
{ returns) }
|
|
if not(vo_is_funcret in parasym.varoptions) then
|
|
make_not_regable(left,[ra_addr_regable,ra_addr_taken])
|
|
else
|
|
make_not_regable(left,[ra_addr_regable]);
|
|
|
|
if do_count then
|
|
begin
|
|
case parasym.varspez of
|
|
vs_out :
|
|
begin
|
|
{ first set written separately to avoid false }
|
|
{ uninitialized warnings (tbs/tb0542) }
|
|
set_varstate(left,vs_written,[]);
|
|
set_varstate(left,vs_readwritten,[]);
|
|
end;
|
|
vs_var :
|
|
set_varstate(left,vs_readwritten,[vsf_must_be_valid,vsf_use_hints]);
|
|
else
|
|
set_varstate(left,vs_read,[vsf_must_be_valid]);
|
|
end;
|
|
end;
|
|
{ must only be done after typeconv PM }
|
|
resultdef:=parasym.vardef;
|
|
end;
|
|
end;
|
|
|
|
{ process next node }
|
|
if assigned(right) then
|
|
tcallparanode(right).insert_typeconv(do_count);
|
|
end;
|
|
|
|
|
|
function tcallparanode.contains_unsafe_typeconversion: boolean;
|
|
var
|
|
n: tnode;
|
|
begin
|
|
n:=left;
|
|
while assigned(n) and
|
|
(n.nodetype=typeconvn) do
|
|
begin
|
|
{ look for type conversion nodes which convert a }
|
|
{ refcounted type into a non-refcounted type }
|
|
if (not n.resultdef.needs_inittable or
|
|
is_class(n.resultdef)) and
|
|
(ttypeconvnode(n).left.resultdef.needs_inittable and
|
|
not is_class(ttypeconvnode(n).left.resultdef)) then
|
|
begin
|
|
result:=true;
|
|
exit;
|
|
end;
|
|
n:=ttypeconvnode(n).left;
|
|
end;
|
|
result:=false;
|
|
end;
|
|
|
|
|
|
function tcallparanode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
(callparaflags = tcallparanode(p).callparaflags)
|
|
;
|
|
end;
|
|
|
|
|
|
procedure tcallparanode.printnodetree(var t:text);
|
|
begin
|
|
printnodelist(t);
|
|
end;
|
|
|
|
|
|
{****************************************************************************
|
|
TCALLNODE
|
|
****************************************************************************}
|
|
|
|
constructor tcallnode.create(l:tnode;v : tprocsym;st : TSymtable; mp: tnode; callflags:tcallnodeflags);
|
|
begin
|
|
inherited create(calln,l,nil);
|
|
symtableprocentry:=v;
|
|
symtableproc:=st;
|
|
callnodeflags:=callflags+[cnf_return_value_used];
|
|
methodpointer:=mp;
|
|
callinitblock:=nil;
|
|
callcleanupblock:=nil;
|
|
procdefinition:=nil;
|
|
funcretnode:=nil;
|
|
paralength:=-1;
|
|
varargsparas:=nil;
|
|
end;
|
|
|
|
|
|
constructor tcallnode.create_procvar(l,r:tnode);
|
|
begin
|
|
inherited create(calln,l,r);
|
|
symtableprocentry:=nil;
|
|
symtableproc:=nil;
|
|
methodpointer:=nil;
|
|
callinitblock:=nil;
|
|
callcleanupblock:=nil;
|
|
procdefinition:=nil;
|
|
callnodeflags:=[cnf_return_value_used];
|
|
funcretnode:=nil;
|
|
paralength:=-1;
|
|
varargsparas:=nil;
|
|
end;
|
|
|
|
|
|
constructor tcallnode.createintern(const name: string; params: tnode);
|
|
var
|
|
srsym: tsym;
|
|
begin
|
|
srsym := tsym(systemunit.Find(name));
|
|
if not assigned(srsym) and
|
|
(cs_compilesystem in current_settings.moduleswitches) then
|
|
srsym := tsym(systemunit.Find(upper(name)));
|
|
if not assigned(srsym) or
|
|
(srsym.typ<>procsym) then
|
|
Message1(cg_f_unknown_compilerproc,name);
|
|
create(params,tprocsym(srsym),srsym.owner,nil,[]);
|
|
end;
|
|
|
|
|
|
constructor tcallnode.createinternres(const name: string; params: tnode; res:tdef);
|
|
var
|
|
pd : tprocdef;
|
|
begin
|
|
createintern(name,params);
|
|
typedef := res;
|
|
include(callnodeflags,cnf_typedefset);
|
|
pd:=tprocdef(symtableprocentry.ProcdefList[0]);
|
|
{ both the normal and specified resultdef either have to be returned via a }
|
|
{ parameter or not, but no mixing (JM) }
|
|
if paramanager.ret_in_param(typedef,pd.proccalloption) xor
|
|
paramanager.ret_in_param(pd.returndef,pd.proccalloption) then
|
|
internalerror(200108291);
|
|
end;
|
|
|
|
|
|
constructor tcallnode.createinternreturn(const name: string; params: tnode; returnnode : tnode);
|
|
begin
|
|
createintern(name,params);
|
|
funcretnode:=returnnode;
|
|
end;
|
|
|
|
|
|
destructor tcallnode.destroy;
|
|
begin
|
|
methodpointer.free;
|
|
callinitblock.free;
|
|
callcleanupblock.free;
|
|
funcretnode.free;
|
|
if assigned(varargsparas) then
|
|
varargsparas.free;
|
|
inherited destroy;
|
|
end;
|
|
|
|
|
|
constructor tcallnode.ppuload(t:tnodetype;ppufile:tcompilerppufile);
|
|
begin
|
|
callinitblock:=tblocknode(ppuloadnode(ppufile));
|
|
methodpointer:=ppuloadnode(ppufile);
|
|
callcleanupblock:=tblocknode(ppuloadnode(ppufile));
|
|
funcretnode:=ppuloadnode(ppufile);
|
|
inherited ppuload(t,ppufile);
|
|
ppufile.getderef(symtableprocentryderef);
|
|
{$warning FIXME: No withsymtable support}
|
|
symtableproc:=nil;
|
|
ppufile.getderef(procdefinitionderef);
|
|
ppufile.getsmallset(callnodeflags);
|
|
end;
|
|
|
|
|
|
procedure tcallnode.ppuwrite(ppufile:tcompilerppufile);
|
|
begin
|
|
ppuwritenode(ppufile,callinitblock);
|
|
ppuwritenode(ppufile,methodpointer);
|
|
ppuwritenode(ppufile,callcleanupblock);
|
|
ppuwritenode(ppufile,funcretnode);
|
|
inherited ppuwrite(ppufile);
|
|
ppufile.putderef(symtableprocentryderef);
|
|
ppufile.putderef(procdefinitionderef);
|
|
ppufile.putsmallset(callnodeflags);
|
|
end;
|
|
|
|
|
|
procedure tcallnode.derefnode;
|
|
begin
|
|
if assigned(callinitblock) then
|
|
callinitblock.derefnode;
|
|
if assigned(methodpointer) then
|
|
methodpointer.derefnode;
|
|
if assigned(callcleanupblock) then
|
|
callcleanupblock.derefnode;
|
|
if assigned(funcretnode) then
|
|
funcretnode.derefnode;
|
|
inherited derefnode;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.buildderefimpl;
|
|
begin
|
|
inherited buildderefimpl;
|
|
symtableprocentryderef.build(symtableprocentry);
|
|
procdefinitionderef.build(procdefinition);
|
|
if assigned(methodpointer) then
|
|
methodpointer.buildderefimpl;
|
|
if assigned(callinitblock) then
|
|
callinitblock.buildderefimpl;
|
|
if assigned(callcleanupblock) then
|
|
callcleanupblock.buildderefimpl;
|
|
if assigned(funcretnode) then
|
|
funcretnode.buildderefimpl;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.derefimpl;
|
|
var
|
|
pt : tcallparanode;
|
|
i : integer;
|
|
begin
|
|
inherited derefimpl;
|
|
symtableprocentry:=tprocsym(symtableprocentryderef.resolve);
|
|
if assigned(symtableprocentry) then
|
|
symtableproc:=symtableprocentry.owner;
|
|
procdefinition:=tabstractprocdef(procdefinitionderef.resolve);
|
|
if assigned(methodpointer) then
|
|
methodpointer.derefimpl;
|
|
if assigned(callinitblock) then
|
|
callinitblock.derefimpl;
|
|
if assigned(callcleanupblock) then
|
|
callcleanupblock.derefimpl;
|
|
if assigned(funcretnode) then
|
|
funcretnode.derefimpl;
|
|
{ Connect parasyms }
|
|
pt:=tcallparanode(left);
|
|
while assigned(pt) and
|
|
(cpf_varargs_para in pt.callparaflags) do
|
|
pt:=tcallparanode(pt.right);
|
|
for i:=procdefinition.paras.count-1 downto 0 do
|
|
begin
|
|
if not assigned(pt) then
|
|
internalerror(200311077);
|
|
pt.parasym:=tparavarsym(procdefinition.paras[i]);
|
|
pt:=tcallparanode(pt.right);
|
|
end;
|
|
if assigned(pt) then
|
|
internalerror(200311078);
|
|
end;
|
|
|
|
|
|
function tcallnode.dogetcopy : tnode;
|
|
var
|
|
n : tcallnode;
|
|
i : integer;
|
|
hp,hpn : tparavarsym;
|
|
oldleft : tnode;
|
|
begin
|
|
{ Need to use a hack here to prevent the parameters from being copied.
|
|
The parameters must be copied between callinitblock/callcleanupblock because
|
|
the can reference methodpointer }
|
|
oldleft:=left;
|
|
left:=nil;
|
|
n:=tcallnode(inherited dogetcopy);
|
|
left:=oldleft;
|
|
n.symtableprocentry:=symtableprocentry;
|
|
n.symtableproc:=symtableproc;
|
|
n.procdefinition:=procdefinition;
|
|
n.typedef := typedef;
|
|
n.callnodeflags := callnodeflags;
|
|
if assigned(callinitblock) then
|
|
n.callinitblock:=tblocknode(callinitblock.dogetcopy)
|
|
else
|
|
n.callinitblock:=nil;
|
|
{ callinitblock is copied, now references to the temp will also be copied
|
|
correctly. We can now copy the parameters, funcret and methodpointer }
|
|
if assigned(left) then
|
|
n.left:=left.dogetcopy
|
|
else
|
|
n.left:=nil;
|
|
if assigned(methodpointer) then
|
|
n.methodpointer:=methodpointer.dogetcopy
|
|
else
|
|
n.methodpointer:=nil;
|
|
if assigned(funcretnode) then
|
|
n.funcretnode:=funcretnode.dogetcopy
|
|
else
|
|
n.funcretnode:=nil;
|
|
if assigned(callcleanupblock) then
|
|
n.callcleanupblock:=tblocknode(callcleanupblock.dogetcopy)
|
|
else
|
|
n.callcleanupblock:=nil;
|
|
if assigned(varargsparas) then
|
|
begin
|
|
n.varargsparas:=tvarargsparalist.create(true);
|
|
for i:=0 to varargsparas.count-1 do
|
|
begin
|
|
hp:=tparavarsym(varargsparas[i]);
|
|
hpn:=tparavarsym.create(hp.realname,hp.paranr,hp.varspez,hp.vardef,[]);
|
|
n.varargsparas.add(hpn);
|
|
end;
|
|
end
|
|
else
|
|
n.varargsparas:=nil;
|
|
result:=n;
|
|
end;
|
|
|
|
|
|
function tcallnode.docompare(p: tnode): boolean;
|
|
begin
|
|
docompare :=
|
|
inherited docompare(p) and
|
|
(symtableprocentry = tcallnode(p).symtableprocentry) and
|
|
(procdefinition = tcallnode(p).procdefinition) and
|
|
(methodpointer.isequal(tcallnode(p).methodpointer)) and
|
|
(((cnf_typedefset in callnodeflags) and (cnf_typedefset in tcallnode(p).callnodeflags) and
|
|
(equal_defs(typedef,tcallnode(p).typedef))) or
|
|
(not(cnf_typedefset in callnodeflags) and not(cnf_typedefset in tcallnode(p).callnodeflags)));
|
|
end;
|
|
|
|
|
|
procedure tcallnode.printnodedata(var t:text);
|
|
begin
|
|
if assigned(procdefinition) and
|
|
(procdefinition.typ=procdef) then
|
|
writeln(t,printnodeindention,'proc = ',tprocdef(procdefinition).fullprocname(true))
|
|
else
|
|
begin
|
|
if assigned(symtableprocentry) then
|
|
writeln(t,printnodeindention,'proc = ',symtableprocentry.name)
|
|
else
|
|
writeln(t,printnodeindention,'proc = <nil>');
|
|
end;
|
|
|
|
if assigned(methodpointer) then
|
|
begin
|
|
writeln(t,printnodeindention,'methodpointer =');
|
|
printnode(t,methodpointer);
|
|
end;
|
|
|
|
if assigned(callinitblock) then
|
|
begin
|
|
writeln(t,printnodeindention,'callinitblock =');
|
|
printnode(t,callinitblock);
|
|
end;
|
|
|
|
if assigned(callcleanupblock) then
|
|
begin
|
|
writeln(t,printnodeindention,'callcleanupblock =');
|
|
printnode(t,callcleanupblock);
|
|
end;
|
|
|
|
if assigned(right) then
|
|
begin
|
|
writeln(t,printnodeindention,'right =');
|
|
printnode(t,right);
|
|
end;
|
|
|
|
if assigned(left) then
|
|
begin
|
|
writeln(t,printnodeindention,'left =');
|
|
printnode(t,left);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.insertintolist(l : tnodelist);
|
|
|
|
begin
|
|
end;
|
|
|
|
|
|
procedure tcallnode.add_init_statement(n:tnode);
|
|
var
|
|
lastinitstatement : tstatementnode;
|
|
begin
|
|
if not assigned(callinitblock) then
|
|
callinitblock:=internalstatements(lastinitstatement)
|
|
else
|
|
lastinitstatement:=laststatement(callinitblock);
|
|
addstatement(lastinitstatement,n);
|
|
end;
|
|
|
|
|
|
procedure tcallnode.add_done_statement(n:tnode);
|
|
var
|
|
lastdonestatement : tstatementnode;
|
|
begin
|
|
if not assigned(callcleanupblock) then
|
|
callcleanupblock:=internalstatements(lastdonestatement)
|
|
else
|
|
lastdonestatement:=laststatement(callcleanupblock);
|
|
addstatement(lastdonestatement,n);
|
|
end;
|
|
|
|
|
|
function tcallnode.para_count:longint;
|
|
var
|
|
ppn : tcallparanode;
|
|
begin
|
|
result:=0;
|
|
ppn:=tcallparanode(left);
|
|
while assigned(ppn) do
|
|
begin
|
|
if not(assigned(ppn.parasym) and
|
|
(vo_is_hidden_para in ppn.parasym.varoptions)) then
|
|
inc(result);
|
|
ppn:=tcallparanode(ppn.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
function tcallnode.is_simple_para_load(p:tnode):boolean;
|
|
var
|
|
hp : tnode;
|
|
begin
|
|
hp:=p;
|
|
while assigned(hp) and
|
|
(hp.nodetype=typeconvn) and
|
|
(ttypeconvnode(hp).convtype=tc_equal) do
|
|
hp:=tunarynode(hp).left;
|
|
result:=(hp.nodetype in [typen,loadvmtaddrn,loadn,temprefn,arrayconstructorn]);
|
|
end;
|
|
|
|
|
|
procedure tcallnode.maybe_load_in_temp(var p:tnode);
|
|
var
|
|
loadp,
|
|
refp : tnode;
|
|
hdef : tdef;
|
|
ptemp : ttempcreatenode;
|
|
usederef : boolean;
|
|
usevoidpointer : boolean;
|
|
begin
|
|
{ Load all complex loads into a temp to prevent
|
|
double calls to a function. We can't simply check for a hp.nodetype=calln }
|
|
if assigned(p) and
|
|
not is_simple_para_load(p) then
|
|
begin
|
|
{ temp create }
|
|
usederef:=(p.resultdef.typ in [arraydef,recorddef]) or
|
|
is_shortstring(p.resultdef) or
|
|
is_object(p.resultdef);
|
|
{ avoid refcount increase }
|
|
usevoidpointer:=is_interface(p.resultdef);
|
|
|
|
if usederef then
|
|
hdef:=tpointerdef.create(p.resultdef)
|
|
else
|
|
hdef:=p.resultdef;
|
|
|
|
if usevoidpointer then
|
|
begin
|
|
ptemp:=ctempcreatenode.create(voidpointertype,voidpointertype.size,tt_persistent,true);
|
|
loadp:=ctypeconvnode.create_internal(p,voidpointertype);
|
|
refp:=ctypeconvnode.create_internal(ctemprefnode.create(ptemp),hdef);
|
|
end
|
|
else
|
|
begin
|
|
ptemp:=ctempcreatenode.create(hdef,hdef.size,tt_persistent,true);
|
|
if usederef then
|
|
begin
|
|
loadp:=caddrnode.create_internal(p);
|
|
refp:=cderefnode.create(ctemprefnode.create(ptemp));
|
|
end
|
|
else
|
|
begin
|
|
loadp:=p;
|
|
refp:=ctemprefnode.create(ptemp)
|
|
end
|
|
end;
|
|
add_init_statement(ptemp);
|
|
add_init_statement(cassignmentnode.create(
|
|
ctemprefnode.create(ptemp),
|
|
loadp));
|
|
add_done_statement(ctempdeletenode.create(ptemp));
|
|
{ new tree is only a temp reference }
|
|
p:=refp;
|
|
typecheckpass(p);
|
|
end;
|
|
end;
|
|
|
|
|
|
function tcallnode.gen_high_tree(var p:tnode;paradef:tdef):tnode;
|
|
{ When passing an array to an open array, or a string to an open string,
|
|
some code is needed that generates the high bound of the array. This
|
|
function returns a tree containing the nodes for it. }
|
|
var
|
|
temp: tnode;
|
|
len : integer;
|
|
loadconst : boolean;
|
|
hightree,l,r : tnode;
|
|
begin
|
|
len:=-1;
|
|
loadconst:=true;
|
|
hightree:=nil;
|
|
case p.resultdef.typ of
|
|
arraydef :
|
|
begin
|
|
if (paradef.typ<>arraydef) then
|
|
internalerror(200405241);
|
|
{ passing a string to an array of char }
|
|
if (p.nodetype=stringconstn) and
|
|
is_char(tarraydef(paradef).elementdef) then
|
|
begin
|
|
len:=tstringconstnode(p).len;
|
|
if len>0 then
|
|
dec(len);
|
|
end
|
|
else
|
|
{ handle special case of passing an single array to an array of array }
|
|
if compare_defs(tarraydef(paradef).elementdef,p.resultdef,nothingn)>=te_equal then
|
|
len:=0
|
|
else
|
|
begin
|
|
{ handle via a normal inline in_high_x node }
|
|
loadconst:=false;
|
|
{ slice? }
|
|
if (p.nodetype=inlinen) and (tinlinenode(p).inlinenumber=in_slice_x) then
|
|
with Tcallparanode(Tinlinenode(p).left) do
|
|
begin
|
|
{Array slice using slice builtin function.}
|
|
l:=Tcallparanode(right).left;
|
|
hightree:=caddnode.create(subn,l,genintconstnode(1));
|
|
Tcallparanode(right).left:=nil;
|
|
|
|
{Remove the inline node.}
|
|
temp:=p;
|
|
p:=left;
|
|
Tcallparanode(tinlinenode(temp).left).left:=nil;
|
|
temp.free;
|
|
|
|
typecheckpass(hightree);
|
|
end
|
|
else if (p.nodetype=vecn) and (Tvecnode(p).right.nodetype=rangen) then
|
|
begin
|
|
{Array slice using .. operator.}
|
|
with Trangenode(Tvecnode(p).right) do
|
|
begin
|
|
l:=left; {Get lower bound.}
|
|
r:=right; {Get upper bound.}
|
|
end;
|
|
{In the procedure the array range is 0..(upper_bound-lower_bound).}
|
|
hightree:=caddnode.create(subn,r,l);
|
|
|
|
{Replace the rangnode in the tree by its lower_bound, and
|
|
dispose the rangenode.}
|
|
temp:=Tvecnode(p).right;
|
|
Tvecnode(p).right:=l.getcopy;
|
|
|
|
{Typecheckpass can only be performed *after* the l.getcopy since it
|
|
can modify the tree, and l is in the hightree.}
|
|
typecheckpass(hightree);
|
|
|
|
with Trangenode(temp) do
|
|
begin
|
|
left:=nil;
|
|
right:=nil;
|
|
end;
|
|
temp.free;
|
|
|
|
{Tree changed from p[l..h] to p[l], recalculate resultdef.}
|
|
p.resultdef:=nil;
|
|
typecheckpass(p);
|
|
end
|
|
else
|
|
begin
|
|
maybe_load_in_temp(p);
|
|
hightree:=geninlinenode(in_high_x,false,p.getcopy);
|
|
typecheckpass(hightree);
|
|
{ only substract low(array) if it's <> 0 }
|
|
temp:=geninlinenode(in_low_x,false,p.getcopy);
|
|
typecheckpass(temp);
|
|
if (temp.nodetype <> ordconstn) or
|
|
(tordconstnode(temp).value <> 0) then
|
|
hightree := caddnode.create(subn,hightree,temp)
|
|
else
|
|
temp.free;
|
|
end;
|
|
end;
|
|
end;
|
|
stringdef :
|
|
begin
|
|
if is_open_string(paradef) then
|
|
begin
|
|
maybe_load_in_temp(p);
|
|
{ handle via a normal inline in_high_x node }
|
|
loadconst := false;
|
|
hightree := geninlinenode(in_high_x,false,p.getcopy);
|
|
end
|
|
else
|
|
{ handle special case of passing an single string to an array of string }
|
|
if compare_defs(tarraydef(paradef).elementdef,p.resultdef,nothingn)>=te_equal then
|
|
len:=0
|
|
else
|
|
{ passing a string to an array of char }
|
|
if (p.nodetype=stringconstn) and
|
|
is_char(tarraydef(paradef).elementdef) then
|
|
begin
|
|
len:=tstringconstnode(p).len;
|
|
if len>0 then
|
|
dec(len);
|
|
end
|
|
else
|
|
begin
|
|
maybe_load_in_temp(p);
|
|
hightree:=caddnode.create(subn,geninlinenode(in_length_x,false,p.getcopy),
|
|
cordconstnode.create(1,sinttype,false));
|
|
loadconst:=false;
|
|
end;
|
|
end;
|
|
else
|
|
len:=0;
|
|
end;
|
|
if loadconst then
|
|
hightree:=cordconstnode.create(len,sinttype,true)
|
|
else
|
|
begin
|
|
if not assigned(hightree) then
|
|
internalerror(200304071);
|
|
{ Need to use explicit, because it can also be a enum }
|
|
hightree:=ctypeconvnode.create_internal(hightree,sinttype);
|
|
end;
|
|
result:=hightree;
|
|
end;
|
|
|
|
|
|
function tcallnode.gen_self_tree_methodpointer:tnode;
|
|
var
|
|
hsym : tfieldvarsym;
|
|
begin
|
|
{ find self field in methodpointer record }
|
|
hsym:=tfieldvarsym(trecorddef(methodpointertype).symtable.Find('self'));
|
|
if not assigned(hsym) then
|
|
internalerror(200305251);
|
|
{ Load tmehodpointer(right).self }
|
|
result:=csubscriptnode.create(
|
|
hsym,
|
|
ctypeconvnode.create_internal(right.getcopy,methodpointertype));
|
|
end;
|
|
|
|
|
|
function tcallnode.gen_self_tree:tnode;
|
|
var
|
|
selftree : tnode;
|
|
begin
|
|
selftree:=nil;
|
|
|
|
{ When methodpointer was a callnode we must load it first into a
|
|
temp to prevent the processing callnode twice }
|
|
if (methodpointer.nodetype=calln) then
|
|
internalerror(200405121);
|
|
|
|
{ inherited }
|
|
if (cnf_inherited in callnodeflags) then
|
|
selftree:=load_self_node
|
|
else
|
|
{ constructors }
|
|
if (procdefinition.proctypeoption=potype_constructor) then
|
|
begin
|
|
{ push 0 as self when allocation is needed }
|
|
if (methodpointer.resultdef.typ=classrefdef) or
|
|
(cnf_new_call in callnodeflags) then
|
|
selftree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
begin
|
|
if methodpointer.nodetype=typen then
|
|
selftree:=load_self_node
|
|
else
|
|
selftree:=methodpointer.getcopy;
|
|
end;
|
|
end
|
|
else
|
|
{ Calling a static/class method }
|
|
if (po_classmethod in procdefinition.procoptions) or
|
|
(po_staticmethod in procdefinition.procoptions) then
|
|
begin
|
|
if (procdefinition.typ<>procdef) then
|
|
internalerror(200305062);
|
|
if (oo_has_vmt in tprocdef(procdefinition)._class.objectoptions) then
|
|
begin
|
|
{ we only need the vmt, loading self is not required and there is no
|
|
need to check for typen, because that will always get the
|
|
loadvmtaddrnode added }
|
|
selftree:=methodpointer.getcopy;
|
|
if (methodpointer.resultdef.typ<>classrefdef) or
|
|
(methodpointer.nodetype = typen) then
|
|
selftree:=cloadvmtaddrnode.create(selftree);
|
|
end
|
|
else
|
|
selftree:=cpointerconstnode.create(0,voidpointertype);
|
|
end
|
|
else
|
|
begin
|
|
if methodpointer.nodetype=typen then
|
|
selftree:=load_self_node
|
|
else
|
|
selftree:=methodpointer.getcopy;
|
|
end;
|
|
result:=selftree;
|
|
end;
|
|
|
|
|
|
function tcallnode.gen_vmt_tree:tnode;
|
|
var
|
|
vmttree : tnode;
|
|
begin
|
|
vmttree:=nil;
|
|
if not(procdefinition.proctypeoption in [potype_constructor,potype_destructor]) then
|
|
internalerror(200305051);
|
|
|
|
{ When methodpointer was a callnode we must load it first into a
|
|
temp to prevent the processing callnode twice }
|
|
if (methodpointer.nodetype=calln) then
|
|
internalerror(200405122);
|
|
|
|
{ Handle classes and legacy objects separate to make it
|
|
more maintainable }
|
|
if (methodpointer.resultdef.typ=classrefdef) then
|
|
begin
|
|
if not is_class(tclassrefdef(methodpointer.resultdef).pointeddef) then
|
|
internalerror(200501041);
|
|
|
|
{ constructor call via classreference => allocate memory }
|
|
if (procdefinition.proctypeoption=potype_constructor) then
|
|
begin
|
|
vmttree:=methodpointer.getcopy;
|
|
{ Only a typenode can be passed when it is called with <class of xx>.create }
|
|
if vmttree.nodetype=typen then
|
|
vmttree:=cloadvmtaddrnode.create(vmttree);
|
|
end
|
|
else
|
|
begin
|
|
{ Call afterconstruction }
|
|
vmttree:=cpointerconstnode.create(1,voidpointertype);
|
|
end;
|
|
end
|
|
else
|
|
{ Class style objects }
|
|
if is_class(methodpointer.resultdef) then
|
|
begin
|
|
{ inherited call, no create/destroy }
|
|
if (cnf_inherited in callnodeflags) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
{ do not create/destroy when called from member function
|
|
without specifying self explicit }
|
|
if (cnf_member_call in callnodeflags) then
|
|
begin
|
|
{ destructor: don't release instance, vmt=0
|
|
constructor:
|
|
if called from a constructor in the same class then
|
|
don't call afterconstruction, vmt=0
|
|
else
|
|
call afterconstrution, vmt=1 }
|
|
if (procdefinition.proctypeoption=potype_destructor) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else if (current_procinfo.procdef.proctypeoption=potype_constructor) and
|
|
(procdefinition.proctypeoption=potype_constructor) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
vmttree:=cpointerconstnode.create(1,voidpointertype);
|
|
end
|
|
else
|
|
{ normal call to method like cl1.proc }
|
|
begin
|
|
{ destructor:
|
|
if not called from exception block in constructor
|
|
call beforedestruction and release instance, vmt=1
|
|
else
|
|
don't call beforedestruction and release instance, vmt=-1
|
|
constructor:
|
|
if called from a constructor in the same class using self.create then
|
|
don't call afterconstruction, vmt=0
|
|
else
|
|
call afterconstrution, vmt=1 }
|
|
if (procdefinition.proctypeoption=potype_destructor) then
|
|
if not(cnf_create_failed in callnodeflags) then
|
|
vmttree:=cpointerconstnode.create(1,voidpointertype)
|
|
else
|
|
vmttree:=cpointerconstnode.create(TConstPtrUInt(-1),voidpointertype)
|
|
else
|
|
begin
|
|
if (current_procinfo.procdef.proctypeoption=potype_constructor) and
|
|
(procdefinition.proctypeoption=potype_constructor) and
|
|
(nf_is_self in methodpointer.flags) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
vmttree:=cpointerconstnode.create(1,voidpointertype);
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
{ Old style object }
|
|
begin
|
|
{ constructor with extended syntax called from new }
|
|
if (cnf_new_call in callnodeflags) then
|
|
vmttree:=cloadvmtaddrnode.create(ctypenode.create(methodpointer.resultdef))
|
|
else
|
|
{ destructor with extended syntax called from dispose }
|
|
if (cnf_dispose_call in callnodeflags) then
|
|
vmttree:=cloadvmtaddrnode.create(methodpointer.getcopy)
|
|
else
|
|
{ inherited call, no create/destroy }
|
|
if (cnf_inherited in callnodeflags) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
{ do not create/destroy when called from member function
|
|
without specifying self explicit }
|
|
if (cnf_member_call in callnodeflags) then
|
|
begin
|
|
{ destructor: don't release instance, vmt=0
|
|
constructor: don't initialize instance, vmt=0 }
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
end
|
|
else
|
|
{ normal object call like obj.proc }
|
|
begin
|
|
{ destructor: direct call, no dispose, vmt=0
|
|
constructor: initialize object, load vmt }
|
|
if (procdefinition.proctypeoption=potype_constructor) then
|
|
begin
|
|
{ old styled inherited call? }
|
|
if (methodpointer.nodetype=typen) then
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype)
|
|
else
|
|
vmttree:=cloadvmtaddrnode.create(ctypenode.create(methodpointer.resultdef))
|
|
end
|
|
else
|
|
vmttree:=cpointerconstnode.create(0,voidpointertype);
|
|
end;
|
|
end;
|
|
result:=vmttree;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.maybe_create_funcret_node;
|
|
var
|
|
temp : ttempcreatenode;
|
|
begin
|
|
{ For the function result we need to create a temp node for:
|
|
- Inlined functions
|
|
- Types requiring initialization/finalization
|
|
- Types passed in parameters }
|
|
if not is_void(resultdef) and
|
|
not assigned(funcretnode) and
|
|
(
|
|
(cnf_do_inline in callnodeflags) or
|
|
resultdef.needs_inittable or
|
|
paramanager.ret_in_param(resultdef,procdefinition.proccalloption)
|
|
) then
|
|
begin
|
|
{ Optimize calls like x:=f() where we can use x directly as
|
|
result instead of using a temp. Condition is that cannot be accessed from f().
|
|
This implies that x is a local variable or value parameter of the current block
|
|
and its address is not passed to f. One problem: what if someone takes the
|
|
address of x, puts it in a pointer variable/field and then accesses it that way from within
|
|
the function? This is solved (in a conservative way) using the ti_addr_taken/addr_taken flags.
|
|
|
|
When the result is not not passed in a parameter there are no problem because then then it
|
|
means only reference counted types (eg. ansistrings) that need a decr of the refcount before
|
|
being assigned. This is all done after the call so there is no issue with exceptions and
|
|
possible use of the old value in the called function }
|
|
if assigned(aktassignmentnode) and
|
|
(aktassignmentnode.right=self) and
|
|
(aktassignmentnode.left.resultdef=resultdef) and
|
|
valid_for_var(aktassignmentnode.left,false) and
|
|
(
|
|
{ when it is not passed in a parameter it will only be used after the function call, but
|
|
only do it when it will be a simple parameter node and doesn't need to be in a temp }
|
|
(
|
|
not paramanager.ret_in_param(resultdef,procdefinition.proccalloption) and
|
|
is_simple_para_load(aktassignmentnode.left)
|
|
) or
|
|
(
|
|
(aktassignmentnode.left.nodetype = temprefn) and
|
|
not(ti_addr_taken in ttemprefnode(aktassignmentnode.left).tempinfo^.flags) and
|
|
not(ti_may_be_in_reg in ttemprefnode(aktassignmentnode.left).tempinfo^.flags)
|
|
) or
|
|
(
|
|
(aktassignmentnode.left.nodetype = loadn) and
|
|
{ nested procedures may access the current procedure's locals }
|
|
(procdefinition.parast.symtablelevel=normal_function_level) and
|
|
{ must be a local variable or a value para }
|
|
(
|
|
(tloadnode(aktassignmentnode.left).symtableentry.typ = localvarsym) or
|
|
(
|
|
(tloadnode(aktassignmentnode.left).symtableentry.typ = paravarsym) and
|
|
(tparavarsym(tloadnode(aktassignmentnode.left).symtableentry).varspez = vs_value)
|
|
)
|
|
) and
|
|
{ the address may not have been taken of the variable/parameter, because }
|
|
{ otherwise it's possible that the called function can access it via a }
|
|
{ global variable or other stored state }
|
|
not(tabstractvarsym(tloadnode(aktassignmentnode.left).symtableentry).addr_taken) and
|
|
(tabstractvarsym(tloadnode(aktassignmentnode.left).symtableentry).varregable in [vr_none,vr_addr])
|
|
)
|
|
) then
|
|
begin
|
|
funcretnode:=aktassignmentnode.left.getcopy;
|
|
include(funcretnode.flags,nf_is_funcret);
|
|
{ notify the assignment node that the assignment can be removed }
|
|
include(aktassignmentnode.flags,nf_assign_done_in_right);
|
|
end
|
|
else
|
|
begin
|
|
temp:=ctempcreatenode.create(resultdef,resultdef.size,tt_persistent,false);
|
|
include(temp.flags,nf_is_funcret);
|
|
add_init_statement(temp);
|
|
{ When the function result is not used in an inlined function
|
|
we need to delete the temp. This can currently only be done by
|
|
a tempdeletenode and not after converting it to a normal temp }
|
|
if not(cnf_return_value_used in callnodeflags) and
|
|
(cnf_do_inline in callnodeflags) then
|
|
add_done_statement(ctempdeletenode.create(temp))
|
|
else
|
|
add_done_statement(ctempdeletenode.create_normal_temp(temp));
|
|
funcretnode:=ctemprefnode.create(temp);
|
|
include(funcretnode.flags,nf_is_funcret);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.gen_hidden_parameters;
|
|
var
|
|
para : tcallparanode;
|
|
begin
|
|
para:=tcallparanode(left);
|
|
while assigned(para) do
|
|
begin
|
|
{ The processing of high() and typeinfo() is already
|
|
done in the typecheckpass. We only need to process the
|
|
nodes that still have a nothingn }
|
|
if (vo_is_hidden_para in para.parasym.varoptions) and
|
|
(para.left.nodetype=nothingn) then
|
|
begin
|
|
{ remove dummy nothingn }
|
|
para.left.free;
|
|
para.left:=nil;
|
|
{ generate the corresponding nodes for the hidden parameter type }
|
|
if (vo_is_funcret in para.parasym.varoptions) then
|
|
begin
|
|
if not assigned(funcretnode) then
|
|
internalerror(200709083);
|
|
para.left:=funcretnode;
|
|
funcretnode:=nil;
|
|
end
|
|
else
|
|
if vo_is_self in para.parasym.varoptions then
|
|
begin
|
|
if assigned(right) then
|
|
para.left:=gen_self_tree_methodpointer
|
|
else
|
|
para.left:=gen_self_tree;
|
|
end
|
|
else
|
|
if vo_is_vmt in para.parasym.varoptions then
|
|
begin
|
|
para.left:=gen_vmt_tree;
|
|
end
|
|
{$if defined(powerpc) or defined(m68k)}
|
|
else
|
|
if vo_is_syscall_lib in para.parasym.varoptions then
|
|
begin
|
|
{ lib parameter has no special type but proccalloptions must be a syscall }
|
|
para.left:=cloadnode.create(tprocdef(procdefinition).libsym,tprocdef(procdefinition).libsym.owner);
|
|
end
|
|
{$endif powerpc or m68k}
|
|
else
|
|
if vo_is_parentfp in para.parasym.varoptions then
|
|
begin
|
|
if not(assigned(procdefinition.owner.defowner)) then
|
|
internalerror(200309287);
|
|
para.left:=cloadparentfpnode.create(tprocdef(procdefinition.owner.defowner));
|
|
end
|
|
else
|
|
if vo_is_range_check in para.parasym.varoptions then
|
|
begin
|
|
para.left:=cordconstnode.create(Ord(cs_check_range in current_settings.localswitches),booltype,false);
|
|
end
|
|
else
|
|
if vo_is_overflow_check in para.parasym.varoptions then
|
|
begin
|
|
para.left:=cordconstnode.create(Ord(cs_check_overflow in current_settings.localswitches),booltype,false);
|
|
end;
|
|
end;
|
|
if not assigned(para.left) then
|
|
internalerror(200709084);
|
|
para:=tcallparanode(para.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.verifyabstract(sym:TObject;arg:pointer);
|
|
var
|
|
pd : tprocdef;
|
|
i : longint;
|
|
j : integer;
|
|
hs : string;
|
|
begin
|
|
if (tsym(sym).typ<>procsym) then
|
|
exit;
|
|
for i:=0 to tprocsym(sym).ProcdefList.Count-1 do
|
|
begin
|
|
pd:=tprocdef(tprocsym(sym).ProcdefList[i]);
|
|
hs:=pd.procsym.name+pd.typename_paras(false);
|
|
j:=AbstractMethodsList.FindIndexOf(hs);
|
|
if j<>-1 then
|
|
AbstractMethodsList[j]:=pd
|
|
else
|
|
AbstractMethodsList.Add(hs,pd);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.verifyabstractcalls;
|
|
var
|
|
objectdf : tobjectdef;
|
|
parents : tlinkedlist;
|
|
objectinfo : tobjectinfoitem;
|
|
pd : tprocdef;
|
|
i : integer;
|
|
first : boolean;
|
|
begin
|
|
objectdf := nil;
|
|
{ verify if trying to create an instance of a class which contains
|
|
non-implemented abstract methods }
|
|
|
|
{ first verify this class type, no class than exit }
|
|
{ also, this checking can only be done if the constructor is directly
|
|
called, indirect constructor calls cannot be checked.
|
|
}
|
|
if assigned(methodpointer) and
|
|
not (nf_is_self in methodpointer.flags) then
|
|
begin
|
|
if (methodpointer.resultdef.typ = objectdef) then
|
|
objectdf:=tobjectdef(methodpointer.resultdef)
|
|
else
|
|
if (methodpointer.resultdef.typ = classrefdef) and
|
|
(tclassrefdef(methodpointer.resultdef).pointeddef.typ = objectdef) and
|
|
(methodpointer.nodetype in [typen,loadvmtaddrn]) then
|
|
objectdf:=tobjectdef(tclassrefdef(methodpointer.resultdef).pointeddef);
|
|
end;
|
|
if not assigned(objectdf) then
|
|
exit;
|
|
|
|
parents := tlinkedlist.create;
|
|
AbstractMethodsList := TFPHashList.create;
|
|
|
|
{ insert all parents in this class : the first item in the
|
|
list will be the base parent of the class .
|
|
}
|
|
while assigned(objectdf) do
|
|
begin
|
|
objectinfo:=tobjectinfoitem.create(objectdf);
|
|
parents.insert(objectinfo);
|
|
objectdf := objectdf.childof;
|
|
end;
|
|
{ now all parents are in the correct order
|
|
insert all abstract methods in the list, and remove
|
|
those which are overriden by parent classes.
|
|
}
|
|
objectinfo:=tobjectinfoitem(parents.first);
|
|
while assigned(objectinfo) do
|
|
begin
|
|
objectdf := objectinfo.objinfo;
|
|
if assigned(objectdf.symtable) then
|
|
objectdf.symtable.SymList.ForEachCall(@verifyabstract,nil);
|
|
objectinfo:=tobjectinfoitem(objectinfo.next);
|
|
end;
|
|
if assigned(parents) then
|
|
parents.free;
|
|
{ Finally give out a warning for each abstract method still in the list }
|
|
first:=true;
|
|
for i:=0 to AbstractMethodsList.Count-1 do
|
|
begin
|
|
pd:=tprocdef(AbstractMethodsList[i]);
|
|
if po_abstractmethod in pd.procoptions then
|
|
begin
|
|
if first then
|
|
begin
|
|
Message1(type_w_instance_with_abstract,objectdf.objrealname^);
|
|
first:=false;
|
|
end;
|
|
MessagePos1(pd.fileinfo,sym_h_abstract_method_list,pd.fullprocname(true));
|
|
end;
|
|
end;
|
|
if assigned(AbstractMethodsList) then
|
|
AbstractMethodsList.Free;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.convert_carg_array_of_const;
|
|
var
|
|
hp : tarrayconstructornode;
|
|
oldleft : tcallparanode;
|
|
begin
|
|
oldleft:=tcallparanode(left);
|
|
if oldleft.left.nodetype<>arrayconstructorn then
|
|
begin
|
|
CGMessage1(type_e_wrong_type_in_array_constructor,oldleft.left.resultdef.typename);
|
|
exit;
|
|
end;
|
|
include(callnodeflags,cnf_uses_varargs);
|
|
{ Get arrayconstructor node and insert typeconvs }
|
|
hp:=tarrayconstructornode(oldleft.left);
|
|
{ Add c args parameters }
|
|
{ It could be an empty set }
|
|
if assigned(hp) and
|
|
assigned(hp.left) then
|
|
begin
|
|
while assigned(hp) do
|
|
begin
|
|
left:=ccallparanode.create(hp.left,left);
|
|
{ set callparanode resultdef and flags }
|
|
left.resultdef:=hp.left.resultdef;
|
|
include(tcallparanode(left).callparaflags,cpf_varargs_para);
|
|
hp.left:=nil;
|
|
hp:=tarrayconstructornode(hp.right);
|
|
end;
|
|
end;
|
|
{ Remove value of old array of const parameter, but keep it
|
|
in the list because it is required for bind_parasym.
|
|
Generate a nothign to keep callparanoed.left valid }
|
|
oldleft.left.free;
|
|
oldleft.left:=cnothingnode.create;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.bind_parasym;
|
|
type
|
|
pcallparanode = ^tcallparanode;
|
|
var
|
|
i : integer;
|
|
pt : tcallparanode;
|
|
oldppt : pcallparanode;
|
|
varargspara,
|
|
currpara : tparavarsym;
|
|
hiddentree : tnode;
|
|
begin
|
|
pt:=tcallparanode(left);
|
|
oldppt:=pcallparanode(@left);
|
|
|
|
{ flag all callparanodes that belong to the varargs }
|
|
i:=paralength;
|
|
while (i>procdefinition.maxparacount) do
|
|
begin
|
|
include(pt.callparaflags,cpf_varargs_para);
|
|
oldppt:=pcallparanode(@pt.right);
|
|
pt:=tcallparanode(pt.right);
|
|
dec(i);
|
|
end;
|
|
|
|
{ skip varargs that are inserted by array of const }
|
|
while assigned(pt) and
|
|
(cpf_varargs_para in pt.callparaflags) do
|
|
pt:=tcallparanode(pt.right);
|
|
|
|
{ process normal parameters and insert hidden parameter nodes, the content
|
|
of the hidden parameters will be updated in pass1 }
|
|
for i:=procdefinition.paras.count-1 downto 0 do
|
|
begin
|
|
currpara:=tparavarsym(procdefinition.paras[i]);
|
|
if vo_is_hidden_para in currpara.varoptions then
|
|
begin
|
|
{ Here we handle only the parameters that depend on
|
|
the types of the previous parameter. The typeconversion
|
|
can change the type in the next step. For example passing
|
|
an array can be change to a pointer and a deref }
|
|
if vo_is_high_para in currpara.varoptions then
|
|
begin
|
|
if not assigned(pt) or (i=0) then
|
|
internalerror(200304081);
|
|
{ we need the information of the previous parameter }
|
|
hiddentree:=gen_high_tree(pt.left,tparavarsym(procdefinition.paras[i-1]).vardef);
|
|
end
|
|
else
|
|
if vo_is_typinfo_para in currpara.varoptions then
|
|
begin
|
|
if not assigned(pt) or (i=0) then
|
|
internalerror(200304082);
|
|
hiddentree:=caddrnode.create_internal(
|
|
crttinode.create(Tstoreddef(pt.resultdef),fullrtti,rdt_normal)
|
|
);
|
|
end
|
|
else
|
|
hiddentree:=cnothingnode.create;
|
|
pt:=ccallparanode.create(hiddentree,oldppt^);
|
|
oldppt^:=pt;
|
|
end;
|
|
if not assigned(pt) then
|
|
internalerror(200310052);
|
|
pt.parasym:=currpara;
|
|
oldppt:=pcallparanode(@pt.right);
|
|
pt:=tcallparanode(pt.right);
|
|
end;
|
|
|
|
{ Create parasyms for varargs, first count the number of varargs paras,
|
|
then insert the parameters with numbering in reverse order. The SortParas
|
|
will set the correct order at the end}
|
|
pt:=tcallparanode(left);
|
|
i:=0;
|
|
while assigned(pt) do
|
|
begin
|
|
if cpf_varargs_para in pt.callparaflags then
|
|
inc(i);
|
|
pt:=tcallparanode(pt.right);
|
|
end;
|
|
if (i>0) then
|
|
begin
|
|
varargsparas:=tvarargsparalist.create;
|
|
pt:=tcallparanode(left);
|
|
while assigned(pt) do
|
|
begin
|
|
if cpf_varargs_para in pt.callparaflags then
|
|
begin
|
|
varargspara:=tparavarsym.create('va'+tostr(i),i,vs_value,pt.resultdef,[]);
|
|
dec(i);
|
|
{ varargspara is left-right, use insert
|
|
instead of concat }
|
|
varargsparas.add(varargspara);
|
|
pt.parasym:=varargspara;
|
|
end;
|
|
pt:=tcallparanode(pt.right);
|
|
end;
|
|
varargsparas.sortparas;
|
|
end;
|
|
end;
|
|
|
|
|
|
function tcallnode.pass_typecheck:tnode;
|
|
var
|
|
candidates : tcallcandidates;
|
|
oldcallnode : tcallnode;
|
|
hpt : tnode;
|
|
pt : tcallparanode;
|
|
lastpara : longint;
|
|
paraidx,
|
|
cand_cnt : integer;
|
|
i : longint;
|
|
is_const : boolean;
|
|
statements : tstatementnode;
|
|
converted_result_data : ttempcreatenode;
|
|
label
|
|
errorexit;
|
|
begin
|
|
result:=nil;
|
|
candidates:=nil;
|
|
|
|
oldcallnode:=aktcallnode;
|
|
aktcallnode:=self;
|
|
|
|
{ determine length of parameter list }
|
|
pt:=tcallparanode(left);
|
|
paralength:=0;
|
|
while assigned(pt) do
|
|
begin
|
|
inc(paralength);
|
|
pt:=tcallparanode(pt.right);
|
|
end;
|
|
|
|
{ determine the type of the parameters }
|
|
if assigned(left) then
|
|
begin
|
|
tcallparanode(left).get_paratype;
|
|
if codegenerror then
|
|
goto errorexit;
|
|
end;
|
|
|
|
if assigned(methodpointer) then
|
|
typecheckpass(methodpointer);
|
|
|
|
{ procedure variable ? }
|
|
if assigned(right) then
|
|
begin
|
|
set_varstate(right,vs_read,[vsf_must_be_valid]);
|
|
typecheckpass(right);
|
|
if codegenerror then
|
|
exit;
|
|
|
|
procdefinition:=tabstractprocdef(right.resultdef);
|
|
|
|
{ Compare parameters from right to left }
|
|
paraidx:=procdefinition.Paras.count-1;
|
|
{ Skip default parameters }
|
|
if not(po_varargs in procdefinition.procoptions) then
|
|
begin
|
|
{ ignore hidden parameters }
|
|
while (paraidx>=0) and (vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions) do
|
|
dec(paraidx);
|
|
for i:=1 to procdefinition.maxparacount-paralength do
|
|
begin
|
|
if paraidx<0 then
|
|
internalerror(200402261);
|
|
if not assigned(tparavarsym(procdefinition.paras[paraidx]).defaultconstsym) then
|
|
begin
|
|
CGMessage1(parser_e_wrong_parameter_size,'<Procedure Variable>');
|
|
goto errorexit;
|
|
end;
|
|
dec(paraidx);
|
|
end;
|
|
end;
|
|
while (paraidx>=0) and (vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions) do
|
|
dec(paraidx);
|
|
pt:=tcallparanode(left);
|
|
lastpara:=paralength;
|
|
while (paraidx>=0) and assigned(pt) do
|
|
begin
|
|
{ only goto next para if we're out of the varargs }
|
|
if not(po_varargs in procdefinition.procoptions) or
|
|
(lastpara<=procdefinition.maxparacount) then
|
|
begin
|
|
repeat
|
|
dec(paraidx);
|
|
until (paraidx<0) or not(vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions);
|
|
end;
|
|
pt:=tcallparanode(pt.right);
|
|
dec(lastpara);
|
|
end;
|
|
if assigned(pt) or
|
|
((paraidx>=0) and
|
|
not assigned(tparavarsym(procdefinition.paras[paraidx]).defaultconstsym)) then
|
|
begin
|
|
if assigned(pt) then
|
|
current_filepos:=pt.fileinfo;
|
|
CGMessage1(parser_e_wrong_parameter_size,'<Procedure Variable>');
|
|
goto errorexit;
|
|
end;
|
|
end
|
|
else
|
|
{ not a procedure variable }
|
|
begin
|
|
{ do we know the procedure to call ? }
|
|
if not(assigned(procdefinition)) then
|
|
begin
|
|
candidates:=tcallcandidates.create(symtableprocentry,symtableproc,left,(nf_isproperty in flags),
|
|
{ ignore possible private in delphi mode for anon. inherited (FK) }
|
|
(m_delphi in current_settings.modeswitches) and (cnf_anon_inherited in callnodeflags));
|
|
|
|
{ no procedures found? then there is something wrong
|
|
with the parameter size or the procedures are
|
|
not accessible }
|
|
if candidates.count=0 then
|
|
begin
|
|
{ when it's an auto inherited call and there
|
|
is no procedure found, but the procedures
|
|
were defined with overload directive and at
|
|
least two procedures are defined then we ignore
|
|
this inherited by inserting a nothingn. Only
|
|
do this ugly hack in Delphi mode as it looks more
|
|
like a bug. It's also not documented }
|
|
if (m_delphi in current_settings.modeswitches) and
|
|
(cnf_anon_inherited in callnodeflags) and
|
|
(symtableprocentry.owner.symtabletype=ObjectSymtable) and
|
|
(po_overload in tprocdef(symtableprocentry.ProcdefList[0]).procoptions) and
|
|
(symtableprocentry.ProcdefList.Count>=2) then
|
|
result:=cnothingnode.create
|
|
else
|
|
begin
|
|
{ in tp mode we can try to convert to procvar if
|
|
there are no parameters specified }
|
|
if not(assigned(left)) and
|
|
not(cnf_inherited in callnodeflags) and
|
|
((m_tp_procvar in current_settings.modeswitches) or
|
|
(m_mac_procvar in current_settings.modeswitches)) and
|
|
(not assigned(methodpointer) or
|
|
(methodpointer.nodetype <> typen)) then
|
|
begin
|
|
hpt:=cloadnode.create(tprocsym(symtableprocentry),symtableproc);
|
|
if assigned(methodpointer) then
|
|
tloadnode(hpt).set_mp(methodpointer.getcopy);
|
|
typecheckpass(hpt);
|
|
result:=hpt;
|
|
end
|
|
else
|
|
begin
|
|
if assigned(left) then
|
|
current_filepos:=left.fileinfo;
|
|
CGMessage1(parser_e_wrong_parameter_size,symtableprocentry.realname);
|
|
symtableprocentry.write_parameter_lists(nil);
|
|
end;
|
|
end;
|
|
goto errorexit;
|
|
end;
|
|
|
|
{ Retrieve information about the candidates }
|
|
candidates.get_information;
|
|
{$ifdef EXTDEBUG}
|
|
{ Display info when multiple candidates are found }
|
|
if candidates.count>1 then
|
|
candidates.dump_info(V_Debug);
|
|
{$endif EXTDEBUG}
|
|
|
|
{ Choose the best candidate and count the number of
|
|
candidates left }
|
|
cand_cnt:=candidates.choose_best(procdefinition,
|
|
assigned(left) and
|
|
not assigned(tcallparanode(left).right) and
|
|
(tcallparanode(left).left.resultdef.typ=variantdef));
|
|
|
|
{ All parameters are checked, check if there are any
|
|
procedures left }
|
|
if cand_cnt>0 then
|
|
begin
|
|
{ Multiple candidates left? }
|
|
if cand_cnt>1 then
|
|
begin
|
|
CGMessage(type_e_cant_choose_overload_function);
|
|
{$ifdef EXTDEBUG}
|
|
candidates.dump_info(V_Hint);
|
|
{$else EXTDEBUG}
|
|
candidates.list(false);
|
|
{$endif EXTDEBUG}
|
|
{ we'll just use the first candidate to make the
|
|
call }
|
|
end;
|
|
|
|
{ assign procdefinition }
|
|
if symtableproc=nil then
|
|
symtableproc:=procdefinition.owner;
|
|
end
|
|
else
|
|
begin
|
|
{ No candidates left, this must be a type error,
|
|
because wrong size is already checked. procdefinition
|
|
is filled with the first (random) definition that is
|
|
found. We use this definition to display a nice error
|
|
message that the wrong type is passed }
|
|
candidates.find_wrong_para;
|
|
candidates.list(true);
|
|
{$ifdef EXTDEBUG}
|
|
candidates.dump_info(V_Hint);
|
|
{$endif EXTDEBUG}
|
|
|
|
{ We can not proceed, release all procs and exit }
|
|
candidates.free;
|
|
goto errorexit;
|
|
end;
|
|
|
|
candidates.free;
|
|
end; { end of procedure to call determination }
|
|
end;
|
|
|
|
{ check for hints (deprecated etc) }
|
|
if (procdefinition.typ = procdef) then
|
|
check_hints(tprocdef(procdefinition).procsym,tprocdef(procdefinition).symoptions);
|
|
|
|
{ add needed default parameters }
|
|
if assigned(procdefinition) and
|
|
(paralength<procdefinition.maxparacount) then
|
|
begin
|
|
paraidx:=0;
|
|
i:=0;
|
|
while (i<paralength) do
|
|
begin
|
|
if paraidx>=procdefinition.Paras.count then
|
|
internalerror(200306181);
|
|
if not(vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions) then
|
|
inc(i);
|
|
inc(paraidx);
|
|
end;
|
|
while (paraidx<procdefinition.paras.count) and (vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions) do
|
|
inc(paraidx);
|
|
while (paraidx<procdefinition.paras.count) do
|
|
begin
|
|
if not assigned(tparavarsym(procdefinition.paras[paraidx]).defaultconstsym) then
|
|
internalerror(200212142);
|
|
left:=ccallparanode.create(genconstsymtree(
|
|
tconstsym(tparavarsym(procdefinition.paras[paraidx]).defaultconstsym)),left);
|
|
{ Ignore vs_hidden parameters }
|
|
repeat
|
|
inc(paraidx);
|
|
until (paraidx>=procdefinition.paras.count) or not(vo_is_hidden_para in tparavarsym(procdefinition.paras[paraidx]).varoptions);
|
|
end;
|
|
end;
|
|
|
|
{ recursive call? }
|
|
if assigned(current_procinfo) and
|
|
(procdefinition=current_procinfo.procdef) then
|
|
include(current_procinfo.flags,pi_is_recursive);
|
|
|
|
{ handle predefined procedures }
|
|
is_const:=(po_internconst in procdefinition.procoptions) and
|
|
((block_type in [bt_const,bt_type]) or
|
|
(assigned(left) and (tcallparanode(left).left.nodetype in [realconstn,ordconstn])));
|
|
if (procdefinition.proccalloption=pocall_internproc) or is_const then
|
|
begin
|
|
if assigned(left) then
|
|
begin
|
|
{ ptr and settextbuf needs two args }
|
|
if assigned(tcallparanode(left).right) then
|
|
begin
|
|
hpt:=geninlinenode(tprocdef(procdefinition).extnumber,is_const,left);
|
|
left:=nil;
|
|
end
|
|
else
|
|
begin
|
|
hpt:=geninlinenode(tprocdef(procdefinition).extnumber,is_const,tcallparanode(left).left);
|
|
tcallparanode(left).left:=nil;
|
|
end;
|
|
end
|
|
else
|
|
hpt:=geninlinenode(tprocdef(procdefinition).extnumber,is_const,nil);
|
|
result:=hpt;
|
|
goto errorexit;
|
|
end;
|
|
|
|
{ ensure that the result type is set }
|
|
if not(cnf_typedefset in callnodeflags) then
|
|
begin
|
|
{ constructors return their current class type, not the type where the
|
|
constructor is declared, this can be different because of inheritance }
|
|
if (procdefinition.proctypeoption=potype_constructor) and
|
|
assigned(methodpointer) and
|
|
assigned(methodpointer.resultdef) and
|
|
(methodpointer.resultdef.typ=classrefdef) then
|
|
resultdef:=tclassrefdef(methodpointer.resultdef).pointeddef
|
|
else
|
|
{ Member call to a (inherited) constructor from the class, the return
|
|
value is always self, so we change it to voidtype to generate an
|
|
error and to prevent users from generating non-working code
|
|
when they expect to clone the current instance, see bug 3662 (PFV) }
|
|
if (procdefinition.proctypeoption=potype_constructor) and
|
|
is_class(tprocdef(procdefinition)._class) and
|
|
assigned(methodpointer) and
|
|
(nf_is_self in methodpointer.flags) then
|
|
resultdef:=voidtype
|
|
else
|
|
resultdef:=procdefinition.returndef;
|
|
end
|
|
else
|
|
resultdef:=typedef;
|
|
|
|
{ Check object/class for methods }
|
|
if assigned(methodpointer) then
|
|
begin
|
|
{ direct call to inherited abstract method, then we
|
|
can already give a error in the compiler instead
|
|
of a runtime error }
|
|
if (cnf_inherited in callnodeflags) and
|
|
(po_abstractmethod in procdefinition.procoptions) then
|
|
begin
|
|
if (m_delphi in current_settings.modeswitches) and
|
|
(cnf_anon_inherited in callnodeflags) then
|
|
begin
|
|
CGMessage(cg_h_inherited_ignored);
|
|
result:=cnothingnode.create;
|
|
exit;
|
|
end
|
|
else
|
|
CGMessage(cg_e_cant_call_abstract_method);
|
|
end;
|
|
|
|
{ if an inherited con- or destructor should be }
|
|
{ called in a con- or destructor then a warning }
|
|
{ will be made }
|
|
{ con- and destructors need a pointer to the vmt }
|
|
if (cnf_inherited in callnodeflags) and
|
|
(procdefinition.proctypeoption in [potype_constructor,potype_destructor]) and
|
|
is_object(methodpointer.resultdef) and
|
|
not(current_procinfo.procdef.proctypeoption in [potype_constructor,potype_destructor]) then
|
|
CGMessage(cg_w_member_cd_call_from_method);
|
|
|
|
if methodpointer.nodetype<>typen then
|
|
begin
|
|
{ Remove all postfix operators }
|
|
hpt:=methodpointer;
|
|
while assigned(hpt) and (hpt.nodetype in [subscriptn,vecn]) do
|
|
hpt:=tunarynode(hpt).left;
|
|
|
|
if (procdefinition.proctypeoption=potype_constructor) and
|
|
assigned(symtableproc) and
|
|
(symtableproc.symtabletype=withsymtable) and
|
|
(tnode(twithsymtable(symtableproc).withrefnode).nodetype=temprefn) then
|
|
CGmessage(cg_e_cannot_call_cons_dest_inside_with);
|
|
|
|
{ R.Init then R will be initialized by the constructor,
|
|
Also allow it for simple loads }
|
|
if (procdefinition.proctypeoption=potype_constructor) or
|
|
((hpt.nodetype=loadn) and
|
|
(methodpointer.resultdef.typ=objectdef) and
|
|
not(oo_has_virtual in tobjectdef(methodpointer.resultdef).objectoptions)
|
|
) then
|
|
{ a constructor will and a method may write something to }
|
|
{ the fields }
|
|
set_varstate(methodpointer,vs_readwritten,[])
|
|
else if ((hpt.nodetype=loadn) and
|
|
(methodpointer.resultdef.typ=classrefdef)) then
|
|
set_varstate(methodpointer,vs_read,[])
|
|
else
|
|
set_varstate(methodpointer,vs_read,[vsf_must_be_valid]);
|
|
|
|
{ The object is already used if it is called once }
|
|
if (hpt.nodetype=loadn) and
|
|
(tloadnode(hpt).symtableentry.typ in [localvarsym,paravarsym,staticvarsym]) then
|
|
set_varstate(hpt,vs_read,[]);
|
|
end;
|
|
|
|
{ if we are calling the constructor check for abstract
|
|
methods. Ignore inherited and member calls, because the
|
|
class is then already created }
|
|
if (procdefinition.proctypeoption=potype_constructor) and
|
|
not(cnf_inherited in callnodeflags) and
|
|
not(cnf_member_call in callnodeflags) then
|
|
verifyabstractcalls;
|
|
end
|
|
else
|
|
begin
|
|
{ When this is method the methodpointer must be available }
|
|
if (right=nil) and
|
|
(procdefinition.owner.symtabletype=ObjectSymtable) then
|
|
internalerror(200305061);
|
|
end;
|
|
|
|
{ Set flag that the procedure uses varargs, also if they are not passed it is still
|
|
needed for x86_64 to pass the number of SSE registers used }
|
|
if po_varargs in procdefinition.procoptions then
|
|
include(callnodeflags,cnf_uses_varargs);
|
|
|
|
{ Change loading of array of const to varargs }
|
|
if assigned(left) and
|
|
is_array_of_const(tparavarsym(procdefinition.paras[procdefinition.paras.count-1]).vardef) and
|
|
(procdefinition.proccalloption in [pocall_cppdecl,pocall_cdecl]) then
|
|
convert_carg_array_of_const;
|
|
|
|
{ bind parasyms to the callparanodes and insert hidden parameters }
|
|
bind_parasym;
|
|
|
|
{ insert type conversions for parameters }
|
|
if assigned(left) then
|
|
tcallparanode(left).insert_typeconv(true);
|
|
|
|
{ dispinterface methode invoke? }
|
|
if assigned(methodpointer) and is_dispinterface(methodpointer.resultdef) then
|
|
begin
|
|
{ if the result is used, we've to insert a call to convert the type to be on the "safe side" }
|
|
if cnf_return_value_used in callnodeflags then
|
|
begin
|
|
result:=internalstatements(statements);
|
|
converted_result_data:=ctempcreatenode.create(procdefinition.returndef,sizeof(procdefinition.returndef),tt_persistent,true);
|
|
addstatement(statements,converted_result_data);
|
|
addstatement(statements,cassignmentnode.create(ctemprefnode.create(converted_result_data),
|
|
ctypeconvnode.create_internal(translate_disp_call(methodpointer,parameters,'',tprocdef(procdefinition).dispid,true),
|
|
procdefinition.returndef)));
|
|
addstatement(statements,ctempdeletenode.create_normal_temp(converted_result_data));
|
|
addstatement(statements,ctemprefnode.create(converted_result_data));
|
|
end
|
|
else
|
|
result:=translate_disp_call(methodpointer,parameters,'',tprocdef(procdefinition).dispid,false);
|
|
|
|
{ don't free reused nodes }
|
|
methodpointer:=nil;
|
|
parameters:=nil;
|
|
end;
|
|
|
|
errorexit:
|
|
aktcallnode:=oldcallnode;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.order_parameters;
|
|
var
|
|
hp,hpcurr,hpnext,hpfirst,hpprev : tcallparanode;
|
|
currloc : tcgloc;
|
|
begin
|
|
hpfirst:=nil;
|
|
hpcurr:=tcallparanode(left);
|
|
while assigned(hpcurr) do
|
|
begin
|
|
{ pull out }
|
|
hpnext:=tcallparanode(hpcurr.right);
|
|
{ pull in at the correct place.
|
|
Used order:
|
|
1. LOC_REFERENCE with smallest offset (i386 only)
|
|
2. LOC_REFERENCE with least complexity (non-i386 only)
|
|
3. LOC_REFERENCE with most complexity (non-i386 only)
|
|
4. LOC_REGISTER with most complexity
|
|
5. LOC_REGISTER with least complexity
|
|
For the moment we only look at the first parameter field. Combining it
|
|
with multiple parameter fields will make things a lot complexer (PFV)
|
|
|
|
The reason for the difference regarding complexity ordering
|
|
between LOC_REFERENCE and LOC_REGISTER is mainly for calls:
|
|
we first want to treat the LOC_REFERENCE destinations whose
|
|
calculation does not require a call, because their location
|
|
may contain registers which might otherwise have to be saved
|
|
if a call has to be evaluated first. The calculated value is
|
|
stored on the stack and will thus no longer occupy any
|
|
register.
|
|
|
|
Similarly, for the register parameters we first want to
|
|
evaluate the calls, because otherwise the already loaded
|
|
register parameters will have to be saved so the intermediate
|
|
call can be evaluated (JM) }
|
|
if not assigned(hpcurr.parasym.paraloc[callerside].location) then
|
|
internalerror(200412152);
|
|
currloc:=hpcurr.parasym.paraloc[callerside].location^.loc;
|
|
hpprev:=nil;
|
|
hp:=hpfirst;
|
|
while assigned(hp) do
|
|
begin
|
|
case currloc of
|
|
LOC_REFERENCE :
|
|
begin
|
|
case hp.parasym.paraloc[callerside].location^.loc of
|
|
LOC_REFERENCE :
|
|
begin
|
|
{ Offset is calculated like:
|
|
sub esp,12
|
|
mov [esp+8],para3
|
|
mov [esp+4],para2
|
|
mov [esp],para1
|
|
call function
|
|
That means the for pushes the para with the
|
|
highest offset (see para3) needs to be pushed first
|
|
}
|
|
{$ifdef i386}
|
|
{ the i386 code generator expects all reference }
|
|
{ parameter to be in this order so it can use }
|
|
{ pushes }
|
|
if (hpcurr.parasym.paraloc[callerside].location^.reference.offset>hp.parasym.paraloc[callerside].location^.reference.offset) then
|
|
{$else i386}
|
|
if (node_complexity(hpcurr)<node_complexity(hp)) then
|
|
{$endif i386}
|
|
break;
|
|
end;
|
|
LOC_MMREGISTER,
|
|
LOC_REGISTER,
|
|
LOC_FPUREGISTER :
|
|
break;
|
|
end;
|
|
end;
|
|
LOC_MMREGISTER,
|
|
LOC_FPUREGISTER,
|
|
LOC_REGISTER :
|
|
begin
|
|
if (hp.parasym.paraloc[callerside].location^.loc<>LOC_REFERENCE) and
|
|
(node_complexity(hpcurr)>node_complexity(hp)) then
|
|
break;
|
|
end;
|
|
end;
|
|
hpprev:=hp;
|
|
hp:=tcallparanode(hp.right);
|
|
end;
|
|
hpcurr.right:=hp;
|
|
if assigned(hpprev) then
|
|
hpprev.right:=hpcurr
|
|
else
|
|
hpfirst:=hpcurr;
|
|
{ next }
|
|
hpcurr:=hpnext;
|
|
end;
|
|
left:=hpfirst;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.check_stack_parameters;
|
|
var
|
|
hp : tcallparanode;
|
|
begin
|
|
hp:=tcallparanode(left);
|
|
while assigned(hp) do
|
|
begin
|
|
if assigned(hp.parasym) and
|
|
assigned(hp.parasym.paraloc[callerside].location) and
|
|
(hp.parasym.paraloc[callerside].location^.loc=LOC_REFERENCE) then
|
|
include(current_procinfo.flags,pi_has_stackparameter);
|
|
hp:=tcallparanode(hp.right);
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.check_inlining;
|
|
var
|
|
st : tsymtable;
|
|
para : tcallparanode;
|
|
begin
|
|
{ Can we inline the procedure? }
|
|
if ([po_inline,po_has_inlininginfo] <= procdefinition.procoptions) then
|
|
begin
|
|
include(callnodeflags,cnf_do_inline);
|
|
{ Check if we can inline the procedure when it references proc/var that
|
|
are not in the globally available }
|
|
st:=procdefinition.owner;
|
|
if (st.symtabletype=ObjectSymtable) then
|
|
st:=st.defowner.owner;
|
|
if (pi_uses_static_symtable in tprocdef(procdefinition).inlininginfo^.flags) and
|
|
(st.symtabletype=globalsymtable) and
|
|
(not st.iscurrentunit) then
|
|
begin
|
|
Comment(V_lineinfo+V_Debug,'Not inlining "'+tprocdef(procdefinition).procsym.realname+'", references static symtable');
|
|
exclude(callnodeflags,cnf_do_inline);
|
|
end;
|
|
para:=tcallparanode(parameters);
|
|
while assigned(para) do
|
|
begin
|
|
if para.contains_unsafe_typeconversion then
|
|
begin
|
|
Comment(V_lineinfo+V_Debug,'Not inlining "'+tprocdef(procdefinition).procsym.realname+'", invocation parameter contains unsafe type conversion');
|
|
exclude(callnodeflags,cnf_do_inline);
|
|
break;
|
|
end;
|
|
para:=tcallparanode(para.nextpara);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
function tcallnode.pass_1 : tnode;
|
|
begin
|
|
result:=nil;
|
|
|
|
{ Check if the call can be inlined, sets the cnf_do_inline flag }
|
|
check_inlining;
|
|
|
|
{ Maybe optimize the loading of the methodpointer using a temp. When the methodpointer
|
|
is a calln this is even required to not execute the calln twice.
|
|
This needs to be done after the resulttype pass, because in the resulttype we can still convert the
|
|
calln to a loadn (PFV) }
|
|
if assigned(methodpointer) then
|
|
maybe_load_in_temp(methodpointer);
|
|
|
|
{ Create destination (temp or assignment-variable reuse) for function result if it not yet set }
|
|
maybe_create_funcret_node;
|
|
|
|
{ Insert the self,vmt,function result in the parameters }
|
|
gen_hidden_parameters;
|
|
|
|
{ Remove useless nodes from init/final blocks }
|
|
if assigned(callinitblock) then
|
|
dosimplify(callinitblock);
|
|
if assigned(callcleanupblock) then
|
|
dosimplify(callcleanupblock);
|
|
|
|
{ Continue with checking a normal call or generate the inlined code }
|
|
if cnf_do_inline in callnodeflags then
|
|
result:=pass1_inline
|
|
else
|
|
result:=pass1_normal;
|
|
end;
|
|
|
|
|
|
function tcallnode.pass1_normal : tnode;
|
|
begin
|
|
result:=nil;
|
|
|
|
{ calculate the parameter info for the procdef }
|
|
if not procdefinition.has_paraloc_info then
|
|
begin
|
|
procdefinition.requiredargarea:=paramanager.create_paraloc_info(procdefinition,callerside);
|
|
procdefinition.has_paraloc_info:=true;
|
|
end;
|
|
|
|
{ calculate the parameter size needed for this call include varargs if they are available }
|
|
if assigned(varargsparas) then
|
|
pushedparasize:=paramanager.create_varargs_paraloc_info(procdefinition,varargsparas)
|
|
else
|
|
pushedparasize:=procdefinition.requiredargarea;
|
|
|
|
{ record maximum parameter size used in this proc }
|
|
current_procinfo.allocate_push_parasize(pushedparasize);
|
|
|
|
{ check for stacked parameters }
|
|
if assigned(left) and
|
|
(current_settings.optimizerswitches*[cs_opt_stackframe,cs_opt_level1]<>[]) then
|
|
check_stack_parameters;
|
|
|
|
if assigned(callinitblock) then
|
|
firstpass(callinitblock);
|
|
|
|
{ function result node (tempref or simple load) }
|
|
if assigned(funcretnode) then
|
|
firstpass(funcretnode);
|
|
|
|
{ parameters }
|
|
if assigned(left) then
|
|
tcallparanode(left).firstcallparan;
|
|
|
|
{ procedure variable ? }
|
|
if assigned(right) then
|
|
firstpass(right);
|
|
|
|
if assigned(methodpointer) and
|
|
(methodpointer.nodetype<>typen) then
|
|
firstpass(methodpointer);
|
|
|
|
if assigned(callcleanupblock) then
|
|
firstpass(callcleanupblock);
|
|
|
|
if not (block_type in [bt_const,bt_type]) then
|
|
include(current_procinfo.flags,pi_do_call);
|
|
|
|
{ order parameters }
|
|
order_parameters;
|
|
|
|
{ get a register for the return value }
|
|
if (not is_void(resultdef)) then
|
|
begin
|
|
if paramanager.ret_in_param(resultdef,procdefinition.proccalloption) then
|
|
begin
|
|
expectloc:=LOC_REFERENCE;
|
|
end
|
|
else
|
|
{ ansi/widestrings must be registered, so we can dispose them }
|
|
if is_ansistring(resultdef) or
|
|
is_widestring(resultdef) then
|
|
begin
|
|
expectloc:=LOC_REFERENCE;
|
|
end
|
|
else
|
|
{ we have only to handle the result if it is used }
|
|
if (cnf_return_value_used in callnodeflags) then
|
|
begin
|
|
case resultdef.typ of
|
|
enumdef,
|
|
orddef :
|
|
begin
|
|
expectloc:=LOC_REGISTER;
|
|
end;
|
|
floatdef :
|
|
begin
|
|
expectloc:=LOC_FPUREGISTER;
|
|
end;
|
|
else
|
|
begin
|
|
expectloc:=procdefinition.funcretloc[callerside].loc;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
expectloc:=LOC_VOID;
|
|
end
|
|
else
|
|
expectloc:=LOC_VOID;
|
|
end;
|
|
|
|
{$ifdef state_tracking}
|
|
function Tcallnode.track_state_pass(exec_known:boolean):boolean;
|
|
|
|
var hp:Tcallparanode;
|
|
value:Tnode;
|
|
|
|
begin
|
|
track_state_pass:=false;
|
|
hp:=Tcallparanode(left);
|
|
while assigned(hp) do
|
|
begin
|
|
if left.track_state_pass(exec_known) then
|
|
begin
|
|
left.resultdef:=nil;
|
|
do_typecheckpass(left);
|
|
end;
|
|
value:=aktstate.find_fact(hp.left);
|
|
if value<>nil then
|
|
begin
|
|
track_state_pass:=true;
|
|
hp.left.destroy;
|
|
hp.left:=value.getcopy;
|
|
do_typecheckpass(hp.left);
|
|
end;
|
|
hp:=Tcallparanode(hp.right);
|
|
end;
|
|
end;
|
|
{$endif}
|
|
|
|
|
|
{**************************************************************************
|
|
INLINING SUPPORT
|
|
**************************************************************************}
|
|
|
|
function tcallnode.replaceparaload(var n: tnode; arg: pointer): foreachnoderesult;
|
|
var
|
|
paras: tcallparanode;
|
|
temp: tnode;
|
|
indexnr : integer;
|
|
begin
|
|
result := fen_false;
|
|
n.fileinfo := pfileposinfo(arg)^;
|
|
if (n.nodetype = loadn) then
|
|
begin
|
|
case tloadnode(n).symtableentry.typ of
|
|
paravarsym :
|
|
begin
|
|
paras := tcallparanode(left);
|
|
while assigned(paras) and
|
|
(paras.parasym <> tloadnode(n).symtableentry) do
|
|
paras := tcallparanode(paras.right);
|
|
if assigned(paras) then
|
|
begin
|
|
n.free;
|
|
n := paras.left.getcopy;
|
|
typecheckpass(n);
|
|
result := fen_true;
|
|
end;
|
|
end;
|
|
localvarsym :
|
|
begin
|
|
{ local? }
|
|
if (tloadnode(n).symtableentry.owner <> tprocdef(procdefinition).localst) then
|
|
exit;
|
|
indexnr:=tloadnode(n).symtableentry.owner.SymList.IndexOf(tloadnode(n).symtableentry);
|
|
if (indexnr >= inlinelocals.count) or
|
|
not assigned(inlinelocals[indexnr]) then
|
|
internalerror(20040720);
|
|
temp := tnode(inlinelocals[indexnr]).getcopy;
|
|
n.free;
|
|
n := temp;
|
|
typecheckpass(n);
|
|
result := fen_true;
|
|
end;
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.createlocaltemps(p:TObject;arg:pointer);
|
|
var
|
|
tempnode: ttempcreatenode;
|
|
indexnr : integer;
|
|
begin
|
|
if (TSym(p).typ <> localvarsym) then
|
|
exit;
|
|
indexnr:=TSym(p).Owner.SymList.IndexOf(p);
|
|
if (indexnr >= inlinelocals.count) then
|
|
inlinelocals.count:=indexnr+10;
|
|
if (vo_is_funcret in tabstractvarsym(p).varoptions) then
|
|
begin
|
|
if not assigned(funcretnode) then
|
|
internalerror(200709081);
|
|
inlinelocals[indexnr] := funcretnode.getcopy
|
|
end
|
|
else
|
|
begin
|
|
tempnode :=ctempcreatenode.create(tabstractvarsym(p).vardef,tabstractvarsym(p).vardef.size,tt_persistent,tabstractvarsym(p).is_regvar(false));
|
|
addstatement(inlineinitstatement,tempnode);
|
|
addstatement(inlinecleanupstatement,ctempdeletenode.create(tempnode));
|
|
{ inherit addr_taken flag }
|
|
if (tabstractvarsym(p).addr_taken) then
|
|
include(tempnode.tempinfo^.flags,ti_addr_taken);
|
|
inlinelocals[indexnr] := ctemprefnode.create(tempnode);
|
|
end;
|
|
end;
|
|
|
|
|
|
function nonlocalvars(var n: tnode; arg: pointer): foreachnoderesult;
|
|
begin
|
|
result := fen_false;
|
|
{ this is just to play it safe, there are more safe situations }
|
|
if (n.nodetype = derefn) or
|
|
((n.nodetype = loadn) and
|
|
{ globals and fields of (possibly global) objects could always be changed in the callee }
|
|
((tloadnode(n).symtable.symtabletype in [globalsymtable,ObjectSymtable]) or
|
|
{ statics can only be modified by functions in the same unit }
|
|
((tloadnode(n).symtable.symtabletype = staticsymtable) and
|
|
(tloadnode(n).symtable = TSymtable(arg))))) or
|
|
((n.nodetype = subscriptn) and
|
|
(tsubscriptnode(n).vs.owner.symtabletype = ObjectSymtable)) then
|
|
result := fen_norecurse_true;
|
|
end;
|
|
|
|
|
|
procedure tcallnode.createinlineparas;
|
|
var
|
|
para: tcallparanode;
|
|
tempnode: ttempcreatenode;
|
|
n: tnode;
|
|
paracomplexity: longint;
|
|
begin
|
|
{ parameters }
|
|
para := tcallparanode(left);
|
|
while assigned(para) do
|
|
begin
|
|
if (para.parasym.typ = paravarsym) then
|
|
begin
|
|
{ must take copy of para.left, because if it contains a }
|
|
{ temprefn pointing to a copied temp (e.g. methodpointer), }
|
|
{ then this parameter must be changed to point to the copy of }
|
|
{ that temp (JM) }
|
|
n := para.left.getcopy;
|
|
para.left.free;
|
|
para.left := n;
|
|
|
|
firstpass(para.left);
|
|
|
|
{ create temps for value parameters, function result and also for }
|
|
{ const parameters which are passed by value instead of by reference }
|
|
{ we need to take care that we use the type of the defined parameter and not of the
|
|
passed parameter, because these can be different in case of a formaldef (PFV) }
|
|
paracomplexity := node_complexity(para.left);
|
|
{ check if we have to create a temp, assign the parameter's }
|
|
{ contents to that temp and then substitute the paramter }
|
|
{ with the temp everywhere in the function }
|
|
if
|
|
((tparavarsym(para.parasym).varregable in [vr_none,vr_addr]) and
|
|
not(para.left.expectloc in [LOC_REFERENCE,LOC_CREFERENCE])) or
|
|
{ we can't assign to formaldef temps }
|
|
((para.parasym.vardef.typ<>formaldef) and
|
|
(
|
|
{ if paracomplexity > 1, we normally take the address of }
|
|
{ the parameter expression, store it in a temp and }
|
|
{ substitute the dereferenced temp in the inlined function }
|
|
{ We can't do this if we can't take the address of the }
|
|
{ parameter expression, so in that case assign to a temp }
|
|
not(para.left.expectloc in [LOC_REFERENCE,LOC_CREFERENCE,LOC_CONSTANT]) or
|
|
((paracomplexity > 1) and
|
|
(not valid_for_addr(para.left,false) or
|
|
(para.left.nodetype = calln) or
|
|
is_constnode(para.left))) or
|
|
{ we do not need to create a temp for value parameters }
|
|
{ which are not modified in the inlined function }
|
|
{ const parameters can get vs_readwritten if their }
|
|
{ address is taken }
|
|
((((para.parasym.varspez = vs_value) and
|
|
(para.parasym.varstate in [vs_initialised,vs_declared,vs_read])) or
|
|
{ in case of const, this is only necessary if the }
|
|
{ variable would be passed by value normally, or if }
|
|
{ there is such a variable somewhere in an expression }
|
|
((para.parasym.varspez = vs_const) and
|
|
(not paramanager.push_addr_param(vs_const,para.parasym.vardef,procdefinition.proccalloption) or
|
|
(paracomplexity > 1)))) and
|
|
{ however, if we pass a global variable, an object field or}
|
|
{ an expression containing a pointer dereference as }
|
|
{ parameter, this value could be modified in other ways as }
|
|
{ well and in such cases create a temp to be on the safe }
|
|
{ side }
|
|
foreachnodestatic(para.left,@nonlocalvars,pointer(symtableproc))) or
|
|
{ value parameters of which we know they are modified by }
|
|
{ definition have to be copied to a temp }
|
|
{ the same goes for cases of "x:=f(x)" where x is passed }
|
|
{ as value parameter to f(), at least if we optimized }
|
|
{ invocation by setting the funcretnode to x to avoid }
|
|
{ assignment afterwards (since x may be read inside the }
|
|
{ function after it modified result==x) }
|
|
((para.parasym.varspez = vs_value) and
|
|
(not(para.parasym.varstate in [vs_initialised,vs_declared,vs_read]) or
|
|
(assigned(aktassignmentnode) and
|
|
(aktassignmentnode.right=self) and
|
|
(nf_assign_done_in_right in aktassignmentnode.flags) and
|
|
aktassignmentnode.left.isequal(para.left)))) or
|
|
{ the compiler expects that it can take the address of parameters passed by reference in
|
|
the case of const so we can't replace the node simply by a constant node
|
|
When playing with this code, ensure that
|
|
function f(const a,b : longint) : longint;inline;
|
|
begin
|
|
result:=a*b;
|
|
end;
|
|
|
|
[...]
|
|
...:=f(10,20));
|
|
[...]
|
|
|
|
is still folded. (FK)
|
|
}
|
|
((para.parasym.varspez = vs_const) and
|
|
{ const para's can get vs_readwritten if their address }
|
|
{ is taken }
|
|
((para.parasym.varstate = vs_readwritten) or
|
|
{ call-by-reference const's may need to be passed by }
|
|
{ reference to function called in the inlined code }
|
|
(paramanager.push_addr_param(vs_const,para.parasym.vardef,procdefinition.proccalloption) and
|
|
(not valid_for_addr(para.left,false) or
|
|
is_constnode(para.left)))))
|
|
)
|
|
) then
|
|
begin
|
|
if para.left.nodetype<>temprefn then
|
|
begin
|
|
tempnode := ctempcreatenode.create(para.parasym.vardef,para.parasym.vardef.size,tt_persistent,tparavarsym(para.parasym).is_regvar(false));
|
|
addstatement(inlineinitstatement,tempnode);
|
|
addstatement(inlinecleanupstatement,ctempdeletenode.create(tempnode));
|
|
addstatement(inlineinitstatement,cassignmentnode.create(ctemprefnode.create(tempnode),
|
|
para.left));
|
|
para.left := ctemprefnode.create(tempnode);
|
|
{ inherit addr_taken flag }
|
|
if (tabstractvarsym(para.parasym).addr_taken) then
|
|
include(tempnode.tempinfo^.flags,ti_addr_taken);
|
|
end;
|
|
end
|
|
{ otherwise if the parameter is "complex", take the address }
|
|
{ of the parameter expression, store it in a temp and replace }
|
|
{ occurrences of the parameter with dereferencings of this }
|
|
{ temp }
|
|
else if (paracomplexity > 1) then
|
|
begin
|
|
tempnode := ctempcreatenode.create(voidpointertype,voidpointertype.size,tt_persistent,tparavarsym(para.parasym).is_regvar(true));
|
|
addstatement(inlineinitstatement,tempnode);
|
|
addstatement(inlinecleanupstatement,ctempdeletenode.create(tempnode));
|
|
{ inherit addr_taken flag }
|
|
if (tabstractvarsym(para.parasym).addr_taken) then
|
|
include(tempnode.tempinfo^.flags,ti_addr_taken);
|
|
addstatement(inlineinitstatement,cassignmentnode.create(ctemprefnode.create(tempnode),
|
|
caddrnode.create_internal(para.left)));
|
|
para.left := ctypeconvnode.create_internal(cderefnode.create(ctemprefnode.create(tempnode)),para.left.resultdef);
|
|
end;
|
|
end;
|
|
para := tcallparanode(para.right);
|
|
end;
|
|
{ local variables }
|
|
if not assigned(tprocdef(procdefinition).localst) or
|
|
(tprocdef(procdefinition).localst.SymList.count = 0) then
|
|
exit;
|
|
inlinelocals.count:=tprocdef(procdefinition).localst.SymList.count;
|
|
tprocdef(procdefinition).localst.SymList.ForEachCall(@createlocaltemps,nil);
|
|
end;
|
|
|
|
|
|
function tcallnode.optimize_funcret_assignment(inlineblock: tblocknode): tnode;
|
|
var
|
|
hp : tstatementnode;
|
|
hp2 : tnode;
|
|
resassign : tassignmentnode;
|
|
begin
|
|
result:=nil;
|
|
if not assigned(funcretnode) or
|
|
not(cnf_return_value_used in callnodeflags) then
|
|
exit;
|
|
|
|
{ tempcreatenode for the function result }
|
|
hp:=tstatementnode(inlineblock.left);
|
|
if not(assigned(hp)) or
|
|
(hp.left.nodetype <> tempcreaten) or
|
|
not(nf_is_funcret in hp.left.flags) then
|
|
exit;
|
|
|
|
{ constant assignment? right must be a constant (mainly to avoid trying
|
|
to reuse local temps which may already be freed afterwards once these
|
|
checks are made looser) }
|
|
hp:=tstatementnode(hp.right);
|
|
if not(assigned(hp)) or
|
|
(hp.left.nodetype<>assignn) or
|
|
not is_constnode(tassignmentnode(hp.left).right) then
|
|
exit;
|
|
|
|
{ left must be function result }
|
|
resassign:=tassignmentnode(hp.left);
|
|
hp2:=resassign.left;
|
|
{ can have extra type conversion due to absolute mapping
|
|
of <fucntionname> on function result var }
|
|
if (hp2.nodetype=typeconvn) and (ttypeconvnode(hp2).convtype=tc_equal) then
|
|
hp2:=ttypeconvnode(hp2).left;
|
|
if (hp2.nodetype<>temprefn) or
|
|
not(nf_is_funcret in hp2.flags) then
|
|
exit;
|
|
|
|
{ tempdelete to normal of the function result }
|
|
hp:=tstatementnode(hp.right);
|
|
if not(assigned(hp)) or
|
|
(hp.left.nodetype <> tempdeleten) then
|
|
exit;
|
|
|
|
{ the function result once more }
|
|
hp:=tstatementnode(hp.right);
|
|
if not(assigned(hp)) or
|
|
(hp.left.nodetype<>temprefn) or
|
|
not(nf_is_funcret in hp.left.flags) then
|
|
exit;
|
|
|
|
{ should be the end }
|
|
if assigned(hp.right) then
|
|
exit;
|
|
|
|
{ we made it! }
|
|
result:=tassignmentnode(resassign).right.getcopy;
|
|
firstpass(result);
|
|
end;
|
|
|
|
|
|
function tcallnode.pass1_inline:tnode;
|
|
var
|
|
n,
|
|
body : tnode;
|
|
para : tcallparanode;
|
|
inlineblock,
|
|
inlinecleanupblock : tblocknode;
|
|
begin
|
|
result:=nil;
|
|
if not(assigned(tprocdef(procdefinition).inlininginfo) and
|
|
assigned(tprocdef(procdefinition).inlininginfo^.code)) then
|
|
internalerror(200412021);
|
|
|
|
inlinelocals:=TFPObjectList.create(true);
|
|
|
|
{ inherit flags }
|
|
current_procinfo.flags := current_procinfo.flags + ((procdefinition as tprocdef).inlininginfo^.flags*inherited_inlining_flags);
|
|
|
|
{ Create new code block for inlining }
|
|
inlineblock:=internalstatements(inlineinitstatement);
|
|
inlinecleanupblock:=internalstatements(inlinecleanupstatement);
|
|
|
|
if assigned(callinitblock) then
|
|
addstatement(inlineinitstatement,callinitblock.getcopy);
|
|
|
|
{ replace complex parameters with temps }
|
|
createinlineparas;
|
|
|
|
{ create a copy of the body and replace parameter loads with the parameter values }
|
|
body:=tprocdef(procdefinition).inlininginfo^.code.getcopy;
|
|
foreachnode(pm_preprocess,body,@replaceparaload,@fileinfo);
|
|
|
|
{ Concat the body and finalization parts }
|
|
addstatement(inlineinitstatement,body);
|
|
addstatement(inlineinitstatement,inlinecleanupblock);
|
|
inlinecleanupblock:=nil;
|
|
|
|
if assigned(callcleanupblock) then
|
|
addstatement(inlineinitstatement,callcleanupblock.getcopy);
|
|
|
|
{ the last statement of the new inline block must return the
|
|
location and type of the function result.
|
|
This is not needed when the result is not used, also the tempnode is then
|
|
already destroyed by a tempdelete in the callcleanupblock tree }
|
|
if not is_void(resultdef) and
|
|
(cnf_return_value_used in callnodeflags) then
|
|
begin
|
|
if assigned(funcretnode) then
|
|
addstatement(inlineinitstatement,funcretnode.getcopy)
|
|
else
|
|
begin
|
|
para:=tcallparanode(left);
|
|
while assigned(para) do
|
|
begin
|
|
if (vo_is_hidden_para in para.parasym.varoptions) and
|
|
(vo_is_funcret in para.parasym.varoptions) then
|
|
begin
|
|
addstatement(inlineinitstatement,para.left.getcopy);
|
|
break;
|
|
end;
|
|
para:=tcallparanode(para.right);
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
{ consider it must not be inlined if called
|
|
again inside the args or itself }
|
|
exclude(procdefinition.procoptions,po_inline);
|
|
dosimplify(inlineblock);
|
|
firstpass(inlineblock);
|
|
include(procdefinition.procoptions,po_inline);
|
|
result:=inlineblock;
|
|
|
|
{ if the function result is used then verify that the blocknode
|
|
returns the same result type as the original callnode }
|
|
if (cnf_return_value_used in callnodeflags) and
|
|
(result.resultdef<>resultdef) then
|
|
internalerror(200709171);
|
|
|
|
{ free the temps for the locals }
|
|
inlinelocals.free;
|
|
inlinelocals:=nil;
|
|
inlineinitstatement:=nil;
|
|
inlinecleanupstatement:=nil;
|
|
|
|
{ if all that's left of the inlined function is an constant assignment
|
|
to the result, replace the whole block with the constant only }
|
|
n:=optimize_funcret_assignment(inlineblock);
|
|
if assigned(n) then
|
|
begin
|
|
inlineblock.free;
|
|
result:=n;
|
|
end;
|
|
|
|
{$ifdef DEBUGINLINE}
|
|
writeln;
|
|
writeln('**************************',tprocdef(procdefinition).mangledname);
|
|
printnode(output,result);
|
|
{$endif DEBUGINLINE}
|
|
end;
|
|
|
|
|
|
begin
|
|
ccallnode:=tcallnode;
|
|
ccallparanode:=tcallparanode;
|
|
end.
|