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124 lines
3.9 KiB
ObjectPascal
124 lines
3.9 KiB
ObjectPascal
{
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Copyright (c) 2011 by Jonas Maebe
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Generate JVM bytecode for in set/case nodes
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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 njvmset;
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{$i fpcdefs.inc}
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interface
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uses
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globtype,
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node,nset,ncgset;
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type
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tjvminnode = class(tcginnode)
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function pass_1: tnode; override;
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end;
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tjvmcasenode = class(tcgcasenode)
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function pass_1: tnode; override;
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end;
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implementation
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uses
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symconst,symdef,
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pass_1,
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ncal,ncnv,ncon,nmem,
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njvmcon,
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cgbase;
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{*****************************************************************************
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TJVMINNODE
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*****************************************************************************}
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function tjvminnode.pass_1: tnode;
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var
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setparts: Tsetparts;
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numparts: byte;
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use_small: boolean;
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isenum: boolean;
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begin
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{ before calling "inherited pass_1", so that in case left is an enum
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constant it's not yet translated into a class instance }
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isenum:=left.resultdef.typ=enumdef;
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{ if we can use jumps, don't transform the set constant and (if
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applicable) the value to be tested }
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if checkgenjumps(setparts,numparts,use_small) then
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begin
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if right.nodetype=setconstn then
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tjvmsetconstnode(right).setconsttype:=sct_notransform;
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if isenum then
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if (left.nodetype=ordconstn) then
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tjvmordconstnode(left).enumconstok:=true
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else
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{ not very clean, since we now have "longint in enumset", but
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the code generator doesn't really mind }
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inserttypeconv_explicit(left,s32inttype);
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end;
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result:=inherited pass_1;
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if assigned(result) then
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exit;
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{ in case of jumps let the regular code handle it }
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if expectloc=LOC_JUMP then
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exit;
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{ otherwise call set helper }
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right:=caddrnode.create_internal(right);
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include(right.flags,nf_typedaddr);
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if isenum then
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begin
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inserttypeconv_explicit(left,java_jlenum);
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inserttypeconv_explicit(right,java_juenumset);
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end
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else
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begin
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inserttypeconv_explicit(left,s32inttype);
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inserttypeconv_explicit(right,java_jubitset);
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end;
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result:=ccallnode.createinternmethod(right,'CONTAINS',ccallparanode.create(left,nil));
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right:=nil;
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left:=nil;
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end;
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{*****************************************************************************
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TJVMCASENODE
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*****************************************************************************}
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function tjvmcasenode.pass_1: tnode;
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begin
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{ convert case expression to an integer in case it's an enum, since
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enums are class instances in the JVM. All labels are stored as
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ordinal values, so it doesn't matter that we change the type }
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if left.resultdef.typ=enumdef then
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inserttypeconv_explicit(left,s32inttype);
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result:=inherited pass_1;
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end;
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begin
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cinnode:=tjvminnode;
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ccasenode:=tjvmcasenode;
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end.
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