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Diffstat (limited to 'compiler/pass_2.pas')
| -rw-r--r-- | compiler/pass_2.pas | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/compiler/pass_2.pas b/compiler/pass_2.pas new file mode 100644 index 0000000000..9905c27e65 --- /dev/null +++ b/compiler/pass_2.pas @@ -0,0 +1,210 @@ +{ + Copyright (c) 1998-2002 by Florian Klaempfl + + This unit handles the codegeneration pass + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + + **************************************************************************** +} +unit pass_2; + +{$i fpcdefs.inc} + +interface + +uses + node; + + type + tenumflowcontrol = (fc_exit,fc_break,fc_continue); + tflowcontrol = set of tenumflowcontrol; + + var + flowcontrol : tflowcontrol; + +{ produces the actual code } +function do_secondpass(var p : tnode) : boolean; +procedure secondpass(var p : tnode); + + +implementation + + uses +{$ifdef EXTDEBUG} + cutils, +{$endif} + globtype,systems,verbose, + globals, + paramgr, + aasmtai, + cgbase, + nflw,cgobj; + +{***************************************************************************** + SecondPass +*****************************************************************************} + +{$ifdef EXTDEBUG} + procedure logsecond(ht:tnodetype; entry: boolean); + const + secondnames: array[tnodetype] of string[13] = + ('<emptynode>', + 'add-addn', {addn} + 'add-muln', {muln} + 'add-subn', {subn} + 'moddiv-divn', {divn} + 'add-symdifn', {symdifn} + 'moddiv-modn', {modn} + 'assignment', {assignn} + 'load', {loadn} + 'nothing-range', {range} + 'add-ltn', {ltn} + 'add-lten', {lten} + 'add-gtn', {gtn} + 'add-gten', {gten} + 'add-equaln', {equaln} + 'add-unequaln', {unequaln} + 'in', {inn} + 'add-orn', {orn} + 'add-xorn', {xorn} + 'shlshr-shrn', {shrn} + 'shlshr-shln', {shln} + 'add-slashn', {slashn} + 'add-andn', {andn} + 'subscriptn', {subscriptn} + 'deref', {derefn} + 'addr', {addrn} + 'ordconst', {ordconstn} + 'typeconv', {typeconvn} + 'calln', {calln} + 'noth-callpar',{callparan} + 'realconst', {realconstn} + 'unaryminus', {unaryminusn} + 'asm', {asmn} + 'vecn', {vecn} + 'pointerconst',{pointerconstn} + 'stringconst', {stringconstn} + 'not', {notn} + 'inline', {inlinen} + 'niln', {niln} + 'error', {errorn} + 'nothing-typen', {typen} + 'setelement', {setelementn} + 'setconst', {setconstn} + 'blockn', {blockn} + 'statement', {statementn} + 'ifn', {ifn} + 'breakn', {breakn} + 'continuen', {continuen} + 'while_repeat', {whilerepeatn} + 'for', {forn} + 'exitn', {exitn} + 'with', {withn} + 'case', {casen} + 'label', {labeln} + 'goto', {goton} + 'tryexcept', {tryexceptn} + 'raise', {raisen} + 'tryfinally', {tryfinallyn} + 'on', {onn} + 'is', {isn} + 'as', {asn} + 'error-caret', {caretn} + 'add-starstar', {starstarn} + 'arrayconstruc', {arrayconstructn} + 'noth-arrcnstr', {arrayconstructrangen} + 'tempcreaten', + 'temprefn', + 'tempdeleten', + 'addoptn', + 'nothing-nothg', {nothingn} + 'loadvmt', {loadvmtn} + 'guidconstn', + 'rttin', + 'loadparentfpn' + ); + var + p: pchar; + begin + if entry then + p := strpnew('second '+secondnames[ht]+' (entry)') + else + p := strpnew('second '+secondnames[ht]+' (exit)'); + exprasmlist.concat(tai_comment.create(p)); + end; +{$endif EXTDEBUG} + + procedure secondpass(var p : tnode); + var + oldcodegenerror : boolean; + oldlocalswitches : tlocalswitches; + oldpos : tfileposinfo; + begin + if not assigned(p) then + internalerror(200208221); + if not(nf_error in p.flags) then + begin + oldcodegenerror:=codegenerror; + oldlocalswitches:=aktlocalswitches; + oldpos:=aktfilepos; + if not inlining_procedure then + aktfilepos:=p.fileinfo; + aktlocalswitches:=p.localswitches; + codegenerror:=false; +{$ifdef EXTDEBUG} + if (p.expectloc=LOC_INVALID) then + Comment(V_Warning,'ExpectLoc is not set before secondpass: '+nodetype2str[p.nodetype]); + if (p.location.loc<>LOC_INVALID) then + Comment(V_Warning,'Location.Loc is already set before secondpass: '+nodetype2str[p.nodetype]); + if (cs_asm_nodes in aktglobalswitches) then + logsecond(p.nodetype,true); +{$endif EXTDEBUG} + p.pass_2; +{$ifdef EXTDEBUG} + if (cs_asm_nodes in aktglobalswitches) then + logsecond(p.nodetype,false); + if (not codegenerror) then + begin + if (p.location.loc=LOC_INVALID) then + Comment(V_Warning,'Location not set in secondpass: '+nodetype2str[p.nodetype]); + end; +{$endif EXTDEBUG} + if codegenerror then + include(p.flags,nf_error); + codegenerror:=codegenerror or oldcodegenerror; + aktlocalswitches:=oldlocalswitches; + aktfilepos:=oldpos; + end + else + codegenerror:=true; + end; + + + function do_secondpass(var p : tnode) : boolean; + begin + { exprasmlist must be empty } + if not exprasmlist.empty then + internalerror(200405201); + + { clear errors before starting } + codegenerror:=false; + if not(nf_error in p.flags) then + secondpass(p); + do_secondpass:=codegenerror; + end; + + +end. |