nllvmcnv.pas 11 KB

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  1. {
  2. Copyright (c) 2014 by Jonas Maebe
  3. Generate LLVM IR for type converting nodes
  4. This program is free software; you can redistribute it and/or modify
  5. it under the terms of the GNU General Public License as published by
  6. the Free Software Foundation; either version 2 of the License, or
  7. (at your option) any later version.
  8. This program is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11. GNU General Public License for more details.
  12. You should have received a copy of the GNU General Public License
  13. along with this program; if not, write to the Free Software
  14. Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  15. ****************************************************************************
  16. }
  17. unit nllvmcnv;
  18. {$i fpcdefs.inc}
  19. interface
  20. uses
  21. symtype,
  22. node,ncnv,ncgcnv,defcmp;
  23. type
  24. tllvmtypeconvnode = class(tcgtypeconvnode)
  25. public
  26. class function target_specific_need_equal_typeconv(fromdef, todef: tdef): boolean; override;
  27. protected
  28. function first_int_to_real: tnode; override;
  29. function first_int_to_bool: tnode; override;
  30. function first_nil_to_methodprocvar: tnode; override;
  31. function first_real_to_real: tnode; override;
  32. { procedure second_int_to_int;override; }
  33. { procedure second_string_to_string;override; }
  34. { procedure second_cstring_to_pchar;override; }
  35. { procedure second_string_to_chararray;override; }
  36. { procedure second_array_to_pointer;override; }
  37. procedure second_pointer_to_array;override;
  38. { procedure second_chararray_to_string;override; }
  39. { procedure second_char_to_string;override; }
  40. procedure second_int_to_real;override;
  41. { procedure second_real_to_real;override; }
  42. { procedure second_cord_to_pointer;override; }
  43. procedure second_proc_to_procvar;override;
  44. procedure second_nil_to_methodprocvar; override;
  45. { procedure second_bool_to_int;override; }
  46. procedure second_int_to_bool;override;
  47. { procedure second_load_smallset;override; }
  48. { procedure second_ansistring_to_pchar;override; }
  49. { procedure second_pchar_to_string;override; }
  50. { procedure second_class_to_intf;override; }
  51. { procedure second_char_to_char;override; }
  52. procedure second_nothing; override;
  53. end;
  54. implementation
  55. uses
  56. globtype,globals,verbose,
  57. aasmbase,aasmdata,
  58. llvmbase,aasmllvm,
  59. procinfo,
  60. ncal,
  61. symconst,symdef,defutil,
  62. cgbase,cgutils,tgobj,hlcgobj,pass_2;
  63. { tllvmtypeconvnode }
  64. class function tllvmtypeconvnode.target_specific_need_equal_typeconv(fromdef, todef: tdef): boolean;
  65. begin
  66. result:=
  67. (fromdef<>todef) and
  68. { two procdefs that are structurally the same but semantically different
  69. still need a conversion }
  70. (
  71. ((fromdef.typ=procvardef) and
  72. (todef.typ=procvardef))
  73. );
  74. end;
  75. function tllvmtypeconvnode.first_int_to_real: tnode;
  76. begin
  77. expectloc:=LOC_FPUREGISTER;
  78. result:=nil;
  79. end;
  80. function tllvmtypeconvnode.first_int_to_bool: tnode;
  81. begin
  82. result:=inherited;
  83. if not assigned(result) then
  84. begin
  85. if not((nf_explicit in flags) and
  86. not(left.location.loc in [LOC_FLAGS,LOC_JUMP])) then
  87. expectloc:=LOC_JUMP;
  88. end;
  89. end;
  90. function tllvmtypeconvnode.first_nil_to_methodprocvar: tnode;
  91. begin
  92. result:=inherited;
  93. if assigned(result) then
  94. exit;
  95. expectloc:=LOC_REFERENCE;
  96. end;
  97. function tllvmtypeconvnode.first_real_to_real: tnode;
  98. begin
  99. result:=inherited;
  100. if assigned(result) then
  101. exit;
  102. { fptosui always uses round to zero, while we have to use the current
  103. rounding mode when converting from another floating point type to
  104. currency/comp to be compatible with the regular code generators ->
  105. call round() instead }
  106. if (tfloatdef(resultdef).floattype in [s64currency,s64comp]) and
  107. not(tfloatdef(left.resultdef).floattype in [s64currency,s64comp]) then
  108. begin
  109. result:=ccallnode.createinternfromunit('SYSTEM','ROUND',
  110. ccallparanode.create(left,nil));
  111. left:=nil;
  112. { left was already been multiplied by 10000 by typecheck_real_to_real
  113. -> ensure we don't do that again with the result of round }
  114. result:=ctypeconvnode.create_internal(result,resultdef);
  115. end;
  116. end;
  117. procedure tllvmtypeconvnode.second_pointer_to_array;
  118. var
  119. hreg: tregister;
  120. begin
  121. inherited;
  122. { insert type conversion }
  123. hreg:=hlcg.getaddressregister(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef));
  124. hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,tpointerdef(left.resultdef).pointeddef,cpointerdef.getreusable(resultdef),location.reference,hreg);
  125. reference_reset_base(location.reference,hreg,0,location.reference.temppos,location.reference.alignment,location.reference.volatility);
  126. end;
  127. procedure tllvmtypeconvnode.second_int_to_real;
  128. var
  129. op: tllvmop;
  130. llvmtodef: tdef;
  131. begin
  132. if is_signed(left.resultdef) then
  133. op:=la_sitofp
  134. else
  135. op:=la_uitofp;
  136. { see comment about currency in thlcgllvm.a_loadfpu_ref_reg }
  137. if not(tfloatdef(resultdef).floattype in [s64comp,s64currency]) then
  138. llvmtodef:=resultdef
  139. else
  140. llvmtodef:=s80floattype;
  141. location_reset(location,LOC_FPUREGISTER,def_cgsize(llvmtodef));
  142. location.register:=hlcg.getfpuregister(current_asmdata.CurrAsmList,llvmtodef);
  143. hlcg.location_force_reg(current_asmdata.CurrAsmList,left.location,left.resultdef,left.resultdef,true);
  144. current_asmdata.CurrAsmList.concat(taillvm.op_reg_size_reg_size(op,location.register,left.resultdef,left.location.register,llvmtodef));
  145. end;
  146. procedure tllvmtypeconvnode.second_proc_to_procvar;
  147. begin
  148. inherited;
  149. if not tabstractprocdef(resultdef).is_addressonly and
  150. not tabstractprocdef(left.resultdef).is_addressonly then
  151. begin
  152. if location.loc<>LOC_REFERENCE then
  153. internalerror(2015111902);
  154. hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,
  155. cpointerdef.getreusable(tprocdef(left.resultdef).getcopyas(procvardef,pc_normal,'')),
  156. cpointerdef.getreusable(resultdef),
  157. location.reference);
  158. end;
  159. end;
  160. procedure tllvmtypeconvnode.second_nil_to_methodprocvar;
  161. var
  162. href: treference;
  163. begin
  164. tg.gethltemp(current_asmdata.CurrAsmList,resultdef,resultdef.size,tt_normal,href);
  165. location_reset_ref(location,LOC_REFERENCE,def_cgsize(resultdef),href.alignment,href.volatility);
  166. location.reference:=href;
  167. hlcg.g_ptrtypecast_ref(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef),cpointerdef.getreusable(methodpointertype),href);
  168. hlcg.g_load_const_field_by_name(current_asmdata.CurrAsmList,trecorddef(methodpointertype),0,'proc',href);
  169. hlcg.g_load_const_field_by_name(current_asmdata.CurrAsmList,trecorddef(methodpointertype),0,'self',href);
  170. end;
  171. procedure tllvmtypeconvnode.second_int_to_bool;
  172. var
  173. truelabel,
  174. falselabel: tasmlabel;
  175. newsize : tcgsize;
  176. begin
  177. secondpass(left);
  178. if codegenerror then
  179. exit;
  180. { Explicit typecasts from any ordinal type to a boolean type }
  181. { must not change the ordinal value }
  182. if (nf_explicit in flags) and
  183. not(left.location.loc in [LOC_FLAGS,LOC_JUMP]) then
  184. begin
  185. location_copy(location,left.location);
  186. newsize:=def_cgsize(resultdef);
  187. { change of size? change sign only if location is LOC_(C)REGISTER? Then we have to sign/zero-extend }
  188. if (tcgsize2size[newsize]<>tcgsize2size[left.location.size]) or
  189. ((newsize<>left.location.size) and (location.loc in [LOC_REGISTER,LOC_CREGISTER])) then
  190. hlcg.location_force_reg(current_asmdata.CurrAsmList,location,left.resultdef,resultdef,true)
  191. else
  192. location.size:=newsize;
  193. exit;
  194. end;
  195. case left.location.loc of
  196. LOC_SUBSETREG,LOC_CSUBSETREG,LOC_SUBSETREF,LOC_CSUBSETREF,
  197. LOC_CREFERENCE,LOC_REFERENCE,LOC_REGISTER,LOC_CREGISTER:
  198. begin
  199. current_asmdata.getjumplabel(truelabel);
  200. current_asmdata.getjumplabel(falselabel);
  201. location_reset_jump(location,truelabel,falselabel);
  202. hlcg.a_cmp_const_loc_label(current_asmdata.CurrAsmList,left.resultdef,OC_EQ,0,left.location,location.falselabel);
  203. hlcg.a_jmp_always(current_asmdata.CurrAsmList,location.truelabel);
  204. end;
  205. LOC_JUMP :
  206. begin
  207. location:=left.location;
  208. end;
  209. else
  210. internalerror(10062);
  211. end;
  212. end;
  213. procedure tllvmtypeconvnode.second_nothing;
  214. var
  215. hreg: tregister;
  216. begin
  217. { insert LLVM-level type conversions for same-sized entities that are
  218. nevertheless different types }
  219. if left.resultdef<>resultdef then
  220. begin
  221. { handle sometype(voidptr^) and "absolute" }
  222. if not is_void(left.resultdef) and
  223. not(nf_absolute in flags) and
  224. (left.resultdef.typ<>formaldef) and
  225. (resultdef.typ<>formaldef) and
  226. { can't get/check the size of open arrays, and they are allowed to
  227. change sizesduring conversions }
  228. not is_open_array(resultdef) and
  229. not is_open_array(left.resultdef) and
  230. { TP-style child objects can be cast to parent objects, and their
  231. sizes may differ }
  232. (not is_object(resultdef) or
  233. not def_is_related(left.resultdef,resultdef)) and
  234. { in case of ISO-like I/O, the typed file def includes a
  235. get/put buffer of the size of the file's elements }
  236. not(
  237. (m_isolike_io in current_settings.modeswitches) and
  238. (left.resultdef.typ=filedef) and
  239. (tfiledef(left.resultdef).filetyp=ft_typed) and
  240. (resultdef.typ=filedef) and
  241. (tfiledef(resultdef).filetyp=ft_untyped)
  242. ) and
  243. { anything else with different size that ends up here is an error }
  244. (left.resultdef.size<>resultdef.size) then
  245. internalerror(2014012216);
  246. hlcg.location_force_mem(current_asmdata.CurrAsmList,left.location,left.resultdef);
  247. hreg:=hlcg.getaddressregister(current_asmdata.CurrAsmList,cpointerdef.getreusable(resultdef));
  248. hlcg.a_loadaddr_ref_reg(current_asmdata.CurrAsmList,left.resultdef,cpointerdef.getreusable(resultdef),left.location.reference,hreg);
  249. location_reset_ref(location,left.location.loc,left.location.size,left.location.reference.alignment,left.location.reference.volatility);
  250. reference_reset_base(location.reference,hreg,0,location.reference.temppos,location.reference.alignment,location.reference.volatility);
  251. end
  252. else
  253. location_copy(location,left.location);
  254. end;
  255. begin
  256. ctypeconvnode:=tllvmtypeconvnode;
  257. end.