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- {
- Copyright (c) 2014 by Jonas Maebe
- Generate LLVM IR for type converting nodes
- 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 nllvmcnv;
- {$i fpcdefs.inc}
- interface
- uses
- symtype,
- node,ncnv,ncgcnv,defcmp;
- type
- tllvmtypeconvnode = class(tcgtypeconvnode)
- public
- class function target_specific_need_equal_typeconv(fromdef, todef: tdef): boolean; override;
- protected
- function first_int_to_real: tnode; override;
- function first_int_to_bool: tnode; override;
- function first_nil_to_methodprocvar: tnode; override;
- function first_real_to_real: tnode; override;
- { procedure second_int_to_int;override; }
- { procedure second_string_to_string;override; }
- { procedure second_cstring_to_pchar;override; }
- { procedure second_string_to_chararray;override; }
- { procedure second_array_to_pointer;override; }
- procedure second_pointer_to_array;override;
- { procedure second_chararray_to_string;override; }
- { procedure second_char_to_string;override; }
- procedure second_int_to_real;override;
- { procedure second_real_to_real;override; }
- { procedure second_cord_to_pointer;override; }
- procedure second_proc_to_procvar;override;
- procedure second_nil_to_methodprocvar; override;
- { procedure second_bool_to_int;override; }
- procedure second_int_to_bool;override;
- { procedure second_load_smallset;override; }
- { procedure second_ansistring_to_pchar;override; }
- { procedure second_pchar_to_string;override; }
- { procedure second_class_to_intf;override; }
- { procedure second_char_to_char;override; }
- procedure second_nothing; override;
- end;
- implementation
- uses
- globtype,globals,verbose,
- aasmbase,aasmdata,
- llvmbase,aasmllvm,
- procinfo,
- ncal,
- symconst,symdef,defutil,
- cgbase,cgutils,tgobj,hlcgobj,pass_2;
- { tllvmtypeconvnode }
- class function tllvmtypeconvnode.target_specific_need_equal_typeconv(fromdef, todef: tdef): boolean;
- begin
- result:=
- (fromdef<>todef) and
- { two procdefs that are structurally the same but semantically different
- still need a conversion }
- (
- ((fromdef.typ=procvardef) and
- (todef.typ=procvardef))
- );
- end;
- function tllvmtypeconvnode.first_int_to_real: tnode;
- begin
- expectloc:=LOC_FPUREGISTER;
- result:=nil;
- end;
- function tllvmtypeconvnode.first_int_to_bool: tnode;
- begin
- result:=inherited;
- if not assigned(result) then
- begin
- if not((nf_explicit in flags) and
- not(left.location.loc in [LOC_FLAGS,LOC_JUMP])) then
- expectloc:=LOC_JUMP;
- end;
- end;
- function tllvmtypeconvnode.first_nil_to_methodprocvar: tnode;
- begin
- result:=inherited;
- if assigned(result) then
- exit;
- expectloc:=LOC_REFERENCE;
- end;
- function tllvmtypeconvnode.first_real_to_real: tnode;
- begin
- result:=inherited;
- if assigned(result) then
- exit;
- { fptosui always uses round to zero, while we have to use the current
- rounding mode when converting from another floating point type to
- currency/comp to be compatible with the regular code generators ->
- call round() instead }
- if (tfloatdef(resultdef).floattype in [s64currency,s64comp]) and
- not(tfloatdef(left.resultdef).floattype in [s64currency,s64comp]) then
- begin
- result:=ccallnode.createinternfromunit('SYSTEM','ROUND',
- ccallparanode.create(left,nil));
- left:=nil;
- { left was already been multiplied by 10000 by typecheck_real_to_real
- -> ensure we don't do that again with the result of round }
- result:=ctypeconvnode.create_internal(result,resultdef);
- end;
- end;
- procedure tllvmtypeconvnode.second_pointer_to_array;
- var
- hreg: tregister;
- begin
- inherited;
- { insert type conversion }
- hreg:=hlcg.getaddressregister(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef));
- hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,tpointerdef(left.resultdef).pointeddef,cpointerdef.getreusable(resultdef),location.reference,hreg);
- reference_reset_base(location.reference,hreg,0,location.reference.temppos,location.reference.alignment,location.reference.volatility);
- end;
- procedure tllvmtypeconvnode.second_int_to_real;
- var
- op: tllvmop;
- llvmtodef: tdef;
- begin
- if is_signed(left.resultdef) then
- op:=la_sitofp
- else
- op:=la_uitofp;
- { see comment about currency in thlcgllvm.a_loadfpu_ref_reg }
- if not(tfloatdef(resultdef).floattype in [s64comp,s64currency]) then
- llvmtodef:=resultdef
- else
- llvmtodef:=s80floattype;
- location_reset(location,LOC_FPUREGISTER,def_cgsize(llvmtodef));
- location.register:=hlcg.getfpuregister(current_asmdata.CurrAsmList,llvmtodef);
- hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
- current_asmdata.CurrAsmList.concat(taillvm.op_reg_size_reg_size(op,location.register,left.resultdef,left.location.register,llvmtodef));
- end;
- procedure tllvmtypeconvnode.second_proc_to_procvar;
- begin
- inherited;
- if not tabstractprocdef(resultdef).is_addressonly and
- not tabstractprocdef(left.resultdef).is_addressonly then
- begin
- if location.loc<>LOC_REFERENCE then
- internalerror(2015111902);
- hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,
- cpointerdef.getreusable(tprocdef(left.resultdef).getcopyas(procvardef,pc_normal,'')),
- cpointerdef.getreusable(resultdef),
- location.reference);
- end;
- end;
- procedure tllvmtypeconvnode.second_nil_to_methodprocvar;
- var
- href: treference;
- begin
- tg.gethltemp(current_asmdata.CurrAsmList,resultdef,resultdef.size,tt_normal,href);
- location_reset_ref(location,LOC_REFERENCE,def_cgsize(resultdef),href.alignment,href.volatility);
- location.reference:=href;
- hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef),cpointerdef.getreusable(methodpointertype),href);
- hlcg.g_load_const_field_by_name(current_asmdata.CurrAsmList,trecorddef(methodpointertype),0,'proc',href);
- hlcg.g_load_const_field_by_name(current_asmdata.CurrAsmList,trecorddef(methodpointertype),0,'self',href);
- end;
- procedure tllvmtypeconvnode.second_int_to_bool;
- var
- truelabel,
- falselabel: tasmlabel;
- newsize : tcgsize;
- begin
- secondpass(left);
- if codegenerror then
- exit;
- { Explicit typecasts from any ordinal type to a boolean type }
- { must not change the ordinal value }
- if (nf_explicit in flags) and
- not(left.location.loc in [LOC_FLAGS,LOC_JUMP]) then
- begin
- location_copy(location,left.location);
- newsize:=def_cgsize(resultdef);
- { change of size? change sign only if location is LOC_(C)REGISTER? Then we have to sign/zero-extend }
- if (tcgsize2size[newsize]<>tcgsize2size[left.location.size]) or
- ((newsize<>left.location.size) and (location.loc in [LOC_REGISTER,LOC_CREGISTER])) then
- hlcg.location_force_reg(current_asmdata.CurrAsmList,location,left.resultdef,resultdef,true)
- else
- location.size:=newsize;
- exit;
- end;
- case left.location.loc of
- LOC_SUBSETREG,LOC_CSUBSETREG,LOC_SUBSETREF,LOC_CSUBSETREF,
- LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER:
- begin
- current_asmdata.getjumplabel(truelabel);
- current_asmdata.getjumplabel(falselabel);
- location_reset_jump(location,truelabel,falselabel);
- hlcg.a_cmp_const_loc_label(current_asmdata.CurrAsmList,left.resultdef,OC_EQ,0,left.location,location.falselabel);
- hlcg.a_jmp_always(current_asmdata.CurrAsmList,location.truelabel);
- end;
- LOC_JUMP :
- begin
- location:=left.location;
- end;
- else
- internalerror(10062);
- end;
- end;
- procedure tllvmtypeconvnode.second_nothing;
- var
- hreg: tregister;
- begin
- { insert LLVM-level type conversions for same-sized entities that are
- nevertheless different types }
- if left.resultdef<>resultdef then
- begin
- { handle sometype(voidptr^) and "absolute" }
- if not is_void(left.resultdef) and
- not(nf_absolute in flags) and
- (left.resultdef.typ<>formaldef) and
- (resultdef.typ<>formaldef) and
- { can't get/check the size of open arrays, and they are allowed to
- change sizesduring conversions }
- not is_open_array(resultdef) and
- not is_open_array(left.resultdef) and
- { TP-style child objects can be cast to parent objects, and their
- sizes may differ }
- (not is_object(resultdef) or
- not def_is_related(left.resultdef,resultdef)) and
- { in case of ISO-like I/O, the typed file def includes a
- get/put buffer of the size of the file's elements }
- not(
- (m_isolike_io in current_settings.modeswitches) and
- (left.resultdef.typ=filedef) and
- (tfiledef(left.resultdef).filetyp=ft_typed) and
- (resultdef.typ=filedef) and
- (tfiledef(resultdef).filetyp=ft_untyped)
- ) and
- { anything else with different size that ends up here is an error }
- (left.resultdef.size<>resultdef.size) then
- internalerror(2014012216);
- hlcg.location_force_mem(current_asmdata.CurrAsmList,left.location,left.resultdef);
- hreg:=hlcg.getaddressregister(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef));
- hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,left.resultdef,cpointerdef.getreusable(resultdef),left.location.reference,hreg);
- location_reset_ref(location,left.location.loc,left.location.size,left.location.reference.alignment,left.location.reference.volatility);
- reference_reset_base(location.reference,hreg,0,location.reference.temppos,location.reference.alignment,location.reference.volatility);
- end
- else
- location_copy(location,left.location);
- end;
- begin
- ctypeconvnode:=tllvmtypeconvnode;
- end.
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