1 //===- TargetSelectionDAG.td - Common code for DAG isels ---*- tablegen -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the target-independent interfaces used by SelectionDAG
11 // instruction selection generators.
13 //===----------------------------------------------------------------------===//
15 //===----------------------------------------------------------------------===//
16 // Selection DAG Type Constraint definitions.
18 // Note that the semantics of these constraints are hard coded into tblgen. To
19 // modify or add constraints, you have to hack tblgen.
22 class SDTypeConstraint<int opnum> {
23 int OperandNum = opnum;
26 // SDTCisVT - The specified operand has exactly this VT.
27 class SDTCisVT<int OpNum, ValueType vt> : SDTypeConstraint<OpNum> {
31 class SDTCisPtrTy<int OpNum> : SDTypeConstraint<OpNum>;
33 // SDTCisInt - The specified operand is has integer type.
34 class SDTCisInt<int OpNum> : SDTypeConstraint<OpNum>;
36 // SDTCisFP - The specified operand is has floating point type.
37 class SDTCisFP<int OpNum> : SDTypeConstraint<OpNum>;
39 // SDTCisSameAs - The two specified operands have identical types.
40 class SDTCisSameAs<int OpNum, int OtherOp> : SDTypeConstraint<OpNum> {
41 int OtherOperandNum = OtherOp;
44 // SDTCisVTSmallerThanOp - The specified operand is a VT SDNode, and its type is
45 // smaller than the 'Other' operand.
46 class SDTCisVTSmallerThanOp<int OpNum, int OtherOp> : SDTypeConstraint<OpNum> {
47 int OtherOperandNum = OtherOp;
50 class SDTCisOpSmallerThanOp<int SmallOp, int BigOp> : SDTypeConstraint<SmallOp>{
51 int BigOperandNum = BigOp;
54 //===----------------------------------------------------------------------===//
55 // Selection DAG Type Profile definitions.
57 // These use the constraints defined above to describe the type requirements of
58 // the various nodes. These are not hard coded into tblgen, allowing targets to
59 // add their own if needed.
62 // SDTypeProfile - This profile describes the type requirements of a Selection
64 class SDTypeProfile<int numresults, int numoperands,
65 list<SDTypeConstraint> constraints> {
66 int NumResults = numresults;
67 int NumOperands = numoperands;
68 list<SDTypeConstraint> Constraints = constraints;
72 def SDTIntLeaf: SDTypeProfile<1, 0, [SDTCisInt<0>]>; // for 'imm'.
73 def SDTFPLeaf : SDTypeProfile<1, 0, [SDTCisFP<0>]>; // for 'fpimm'.
74 def SDTPtrLeaf: SDTypeProfile<1, 0, [SDTCisPtrTy<0>]>; // for '&g'.
75 def SDTOther : SDTypeProfile<1, 0, [SDTCisVT<0, OtherVT>]>; // for 'vt'.
76 def SDTUNDEF : SDTypeProfile<1, 0, []>; // for 'undef'.
77 def SDTIntBinOp : SDTypeProfile<1, 2, [ // add, and, or, xor, udiv, etc.
78 SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisInt<0>
80 def SDTIntShiftOp : SDTypeProfile<1, 2, [ // shl, sra, srl
81 SDTCisSameAs<0, 1>, SDTCisInt<0>, SDTCisInt<2>
83 def SDTFPBinOp : SDTypeProfile<1, 2, [ // fadd, fmul, etc.
84 SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisFP<0>
86 def SDTFPSignOp : SDTypeProfile<1, 2, [ // fcopysign.
87 SDTCisSameAs<0, 1>, SDTCisFP<0>, SDTCisFP<2>
89 def SDTFPTernaryOp : SDTypeProfile<1, 3, [ // fmadd, fnmsub, etc.
90 SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisSameAs<0, 3>, SDTCisFP<0>
92 def SDTIntUnaryOp : SDTypeProfile<1, 1, [ // ctlz
93 SDTCisSameAs<0, 1>, SDTCisInt<0>
95 def SDTIntExtendOp : SDTypeProfile<1, 1, [ // sext, zext, anyext
96 SDTCisInt<0>, SDTCisInt<1>, SDTCisOpSmallerThanOp<1, 0>
98 def SDTIntTruncOp : SDTypeProfile<1, 1, [ // trunc
99 SDTCisInt<0>, SDTCisInt<1>, SDTCisOpSmallerThanOp<0, 1>
101 def SDTFPUnaryOp : SDTypeProfile<1, 1, [ // fneg, fsqrt, etc
102 SDTCisSameAs<0, 1>, SDTCisFP<0>
104 def SDTFPRoundOp : SDTypeProfile<1, 1, [ // fround
105 SDTCisFP<0>, SDTCisFP<1>, SDTCisOpSmallerThanOp<0, 1>
107 def SDTFPExtendOp : SDTypeProfile<1, 1, [ // fextend
108 SDTCisFP<0>, SDTCisFP<1>, SDTCisOpSmallerThanOp<1, 0>
110 def SDTIntToFPOp : SDTypeProfile<1, 1, [ // [su]int_to_fp
111 SDTCisFP<0>, SDTCisInt<1>
113 def SDTFPToIntOp : SDTypeProfile<1, 1, [ // fp_to_[su]int
114 SDTCisInt<0>, SDTCisFP<1>
116 def SDTExtInreg : SDTypeProfile<1, 2, [ // sext_inreg
117 SDTCisSameAs<0, 1>, SDTCisInt<0>, SDTCisVT<2, OtherVT>,
118 SDTCisVTSmallerThanOp<2, 1>
121 def SDTSetCC : SDTypeProfile<1, 3, [ // setcc
122 SDTCisInt<0>, SDTCisSameAs<1, 2>, SDTCisVT<3, OtherVT>
125 def SDTSelect : SDTypeProfile<1, 3, [ // select
126 SDTCisInt<1>, SDTCisSameAs<0, 2>, SDTCisSameAs<2, 3>
129 def SDTSelectCC : SDTypeProfile<1, 5, [ // select_cc
130 SDTCisSameAs<1, 2>, SDTCisSameAs<3, 4>, SDTCisSameAs<0, 3>,
134 def SDTBr : SDTypeProfile<0, 1, [ // br
138 def SDTBrcond : SDTypeProfile<0, 2, [ // brcond
139 SDTCisInt<0>, SDTCisVT<1, OtherVT>
142 def SDTRet : SDTypeProfile<0, 0, []>; // ret
144 def SDTLoad : SDTypeProfile<1, 1, [ // load
148 def SDTStore : SDTypeProfile<0, 2, [ // store
152 def SDTExtLoad : SDTypeProfile<1, 3, [ // extload
153 SDTCisPtrTy<1>, SDTCisVT<2, OtherVT>, SDTCisVT<3, OtherVT>
155 def SDTIntExtLoad : SDTypeProfile<1, 3, [ // sextload, zextload
156 SDTCisInt<0>, SDTCisPtrTy<1>, SDTCisVT<2, OtherVT>, SDTCisVT<3, OtherVT>
158 def SDTTruncStore : SDTypeProfile<0, 4, [ // truncstore
159 SDTCisPtrTy<1>, SDTCisVT<2, OtherVT>, SDTCisVT<3, OtherVT>
162 //===----------------------------------------------------------------------===//
163 // Selection DAG Node Properties.
165 // Note: These are hard coded into tblgen.
167 class SDNodeProperty;
168 def SDNPCommutative : SDNodeProperty; // X op Y == Y op X
169 def SDNPAssociative : SDNodeProperty; // (X op Y) op Z == X op (Y op Z)
170 def SDNPHasChain : SDNodeProperty; // R/W chain operand and result
171 def SDNPOutFlag : SDNodeProperty; // Write a flag result
172 def SDNPInFlag : SDNodeProperty; // Read a flag operand
173 def SDNPOptInFlag : SDNodeProperty; // Optionally read a flag operand
175 //===----------------------------------------------------------------------===//
176 // Selection DAG Node definitions.
178 class SDNode<string opcode, SDTypeProfile typeprof,
179 list<SDNodeProperty> props = [], string sdclass = "SDNode"> {
180 string Opcode = opcode;
181 string SDClass = sdclass;
182 list<SDNodeProperty> Properties = props;
183 SDTypeProfile TypeProfile = typeprof;
190 def imm : SDNode<"ISD::Constant" , SDTIntLeaf , [], "ConstantSDNode">;
191 def fpimm : SDNode<"ISD::TargetConstantFP",
192 SDTFPLeaf, [], "ConstantFPSDNode">;
193 def vt : SDNode<"ISD::VALUETYPE" , SDTOther , [], "VTSDNode">;
194 def bb : SDNode<"ISD::BasicBlock", SDTOther , [], "BasicBlockSDNode">;
195 def cond : SDNode<"ISD::CONDCODE" , SDTOther , [], "CondCodeSDNode">;
196 def undef : SDNode<"ISD::UNDEF" , SDTUNDEF , []>;
197 def globaladdr : SDNode<"ISD::GlobalAddress", SDTPtrLeaf, [],
198 "GlobalAddressSDNode">;
199 def tglobaladdr : SDNode<"ISD::TargetGlobalAddress", SDTPtrLeaf, [],
200 "GlobalAddressSDNode">;
201 def constpool : SDNode<"ISD::ConstantPool", SDTPtrLeaf, [],
202 "ConstantPoolSDNode">;
203 def tconstpool : SDNode<"ISD::TargetConstantPool", SDTPtrLeaf, [],
204 "ConstantPoolSDNode">;
205 def frameindex : SDNode<"ISD::FrameIndex", SDTPtrLeaf, [],
207 def tframeindex : SDNode<"ISD::TargetFrameIndex", SDTPtrLeaf, [],
209 def externalsym : SDNode<"ISD::ExternalSymbol", SDTPtrLeaf, [],
210 "ExternalSymbolSDNode">;
211 def texternalsym: SDNode<"ISD::TargetExternalSymbol", SDTPtrLeaf, [],
212 "ExternalSymbolSDNode">;
214 def add : SDNode<"ISD::ADD" , SDTIntBinOp ,
215 [SDNPCommutative, SDNPAssociative]>;
216 def sub : SDNode<"ISD::SUB" , SDTIntBinOp>;
217 def mul : SDNode<"ISD::MUL" , SDTIntBinOp,
218 [SDNPCommutative, SDNPAssociative]>;
219 def mulhs : SDNode<"ISD::MULHS" , SDTIntBinOp, [SDNPCommutative]>;
220 def mulhu : SDNode<"ISD::MULHU" , SDTIntBinOp, [SDNPCommutative]>;
221 def sdiv : SDNode<"ISD::SDIV" , SDTIntBinOp>;
222 def udiv : SDNode<"ISD::UDIV" , SDTIntBinOp>;
223 def srem : SDNode<"ISD::SREM" , SDTIntBinOp>;
224 def urem : SDNode<"ISD::UREM" , SDTIntBinOp>;
225 def srl : SDNode<"ISD::SRL" , SDTIntShiftOp>;
226 def sra : SDNode<"ISD::SRA" , SDTIntShiftOp>;
227 def shl : SDNode<"ISD::SHL" , SDTIntShiftOp>;
228 def rotl : SDNode<"ISD::ROTL" , SDTIntShiftOp>;
229 def rotr : SDNode<"ISD::ROTR" , SDTIntShiftOp>;
230 def and : SDNode<"ISD::AND" , SDTIntBinOp,
231 [SDNPCommutative, SDNPAssociative]>;
232 def or : SDNode<"ISD::OR" , SDTIntBinOp,
233 [SDNPCommutative, SDNPAssociative]>;
234 def xor : SDNode<"ISD::XOR" , SDTIntBinOp,
235 [SDNPCommutative, SDNPAssociative]>;
236 def addc : SDNode<"ISD::ADDC" , SDTIntBinOp,
237 [SDNPCommutative, SDNPOutFlag]>;
238 def adde : SDNode<"ISD::ADDE" , SDTIntBinOp,
239 [SDNPCommutative, SDNPOutFlag, SDNPInFlag]>;
240 def subc : SDNode<"ISD::SUBC" , SDTIntBinOp,
242 def sube : SDNode<"ISD::SUBE" , SDTIntBinOp,
243 [SDNPOutFlag, SDNPInFlag]>;
245 def sext_inreg : SDNode<"ISD::SIGN_EXTEND_INREG", SDTExtInreg>;
246 def bswap : SDNode<"ISD::BSWAP" , SDTIntUnaryOp>;
247 def ctlz : SDNode<"ISD::CTLZ" , SDTIntUnaryOp>;
248 def cttz : SDNode<"ISD::CTTZ" , SDTIntUnaryOp>;
249 def ctpop : SDNode<"ISD::CTPOP" , SDTIntUnaryOp>;
250 def sext : SDNode<"ISD::SIGN_EXTEND", SDTIntExtendOp>;
251 def zext : SDNode<"ISD::ZERO_EXTEND", SDTIntExtendOp>;
252 def anyext : SDNode<"ISD::ANY_EXTEND" , SDTIntExtendOp>;
253 def trunc : SDNode<"ISD::TRUNCATE" , SDTIntTruncOp>;
255 def fadd : SDNode<"ISD::FADD" , SDTFPBinOp, [SDNPCommutative]>;
256 def fsub : SDNode<"ISD::FSUB" , SDTFPBinOp>;
257 def fmul : SDNode<"ISD::FMUL" , SDTFPBinOp, [SDNPCommutative]>;
258 def fdiv : SDNode<"ISD::FDIV" , SDTFPBinOp>;
259 def frem : SDNode<"ISD::FREM" , SDTFPBinOp>;
260 def fabs : SDNode<"ISD::FABS" , SDTFPUnaryOp>;
261 def fneg : SDNode<"ISD::FNEG" , SDTFPUnaryOp>;
262 def fsqrt : SDNode<"ISD::FSQRT" , SDTFPUnaryOp>;
263 def fsin : SDNode<"ISD::FSIN" , SDTFPUnaryOp>;
264 def fcos : SDNode<"ISD::FCOS" , SDTFPUnaryOp>;
266 def fround : SDNode<"ISD::FP_ROUND" , SDTFPRoundOp>;
267 def fextend : SDNode<"ISD::FP_EXTEND" , SDTFPExtendOp>;
268 def fcopysign : SDNode<"ISD::FCOPYSIGN" , SDTFPSignOp>;
270 def sint_to_fp : SDNode<"ISD::SINT_TO_FP" , SDTIntToFPOp>;
271 def uint_to_fp : SDNode<"ISD::UINT_TO_FP" , SDTIntToFPOp>;
272 def fp_to_sint : SDNode<"ISD::FP_TO_SINT" , SDTFPToIntOp>;
273 def fp_to_uint : SDNode<"ISD::FP_TO_UINT" , SDTFPToIntOp>;
275 def setcc : SDNode<"ISD::SETCC" , SDTSetCC>;
276 def select : SDNode<"ISD::SELECT" , SDTSelect>;
277 def selectcc : SDNode<"ISD::SELECT_CC" , SDTSelectCC>;
279 def brcond : SDNode<"ISD::BRCOND" , SDTBrcond, [SDNPHasChain]>;
280 def br : SDNode<"ISD::BR" , SDTBr, [SDNPHasChain]>;
281 def ret : SDNode<"ISD::RET" , SDTRet, [SDNPHasChain]>;
283 def load : SDNode<"ISD::LOAD" , SDTLoad, [SDNPHasChain]>;
284 def store : SDNode<"ISD::STORE" , SDTStore, [SDNPHasChain]>;
286 // Do not use sextld and zextld directly. Use sextload and zextload (see
287 // below) which pass in a dummy srcvalue node which tblgen will skip over.
288 def sextld : SDNode<"ISD::SEXTLOAD" , SDTIntExtLoad, [SDNPHasChain]>;
289 def zextld : SDNode<"ISD::ZEXTLOAD" , SDTIntExtLoad, [SDNPHasChain]>;
290 def extld : SDNode<"ISD::EXTLOAD" , SDTExtLoad, [SDNPHasChain]>;
291 def truncst : SDNode<"ISD::TRUNCSTORE" , SDTTruncStore, [SDNPHasChain]>;
293 //===----------------------------------------------------------------------===//
294 // Selection DAG Condition Codes
296 class CondCode; // ISD::CondCode enums
297 def SETOEQ : CondCode; def SETOGT : CondCode;
298 def SETOGE : CondCode; def SETOLT : CondCode; def SETOLE : CondCode;
299 def SETONE : CondCode; def SETO : CondCode; def SETUO : CondCode;
300 def SETUEQ : CondCode; def SETUGT : CondCode; def SETUGE : CondCode;
301 def SETULT : CondCode; def SETULE : CondCode; def SETUNE : CondCode;
303 def SETEQ : CondCode; def SETGT : CondCode; def SETGE : CondCode;
304 def SETLT : CondCode; def SETLE : CondCode; def SETNE : CondCode;
307 //===----------------------------------------------------------------------===//
308 // Selection DAG Node Transformation Functions.
310 // This mechanism allows targets to manipulate nodes in the output DAG once a
311 // match has been formed. This is typically used to manipulate immediate
314 class SDNodeXForm<SDNode opc, code xformFunction> {
316 code XFormFunction = xformFunction;
319 def NOOP_SDNodeXForm : SDNodeXForm<imm, [{}]>;
322 //===----------------------------------------------------------------------===//
323 // Selection DAG Pattern Fragments.
325 // Pattern fragments are reusable chunks of dags that match specific things.
326 // They can take arguments and have C++ predicates that control whether they
327 // match. They are intended to make the patterns for common instructions more
328 // compact and readable.
331 /// PatFrag - Represents a pattern fragment. This can match something on the
332 /// DAG, frame a single node to multiply nested other fragments.
334 class PatFrag<dag ops, dag frag, code pred = [{}],
335 SDNodeXForm xform = NOOP_SDNodeXForm> {
338 code Predicate = pred;
339 SDNodeXForm OperandTransform = xform;
342 // PatLeaf's are pattern fragments that have no operands. This is just a helper
343 // to define immediates and other common things concisely.
344 class PatLeaf<dag frag, code pred = [{}], SDNodeXForm xform = NOOP_SDNodeXForm>
345 : PatFrag<(ops), frag, pred, xform>;
349 def immAllOnes : PatLeaf<(imm), [{ return N->isAllOnesValue(); }]>;
350 def vtInt : PatLeaf<(vt), [{ return MVT::isInteger(N->getVT()); }]>;
351 def vtFP : PatLeaf<(vt), [{ return MVT::isFloatingPoint(N->getVT()); }]>;
353 // Other helper fragments.
355 def not : PatFrag<(ops node:$in), (xor node:$in, immAllOnes)>;
356 def ineg : PatFrag<(ops node:$in), (sub 0, node:$in)>;
358 // extending load & truncstore fragments.
359 def sextload : PatFrag<(ops node:$ptr, node:$vt),
360 (sextld node:$ptr, srcvalue:$dummy, node:$vt)>;
361 def zextload : PatFrag<(ops node:$ptr, node:$vt),
362 (zextld node:$ptr, srcvalue:$dummy, node:$vt)>;
363 def extload : PatFrag<(ops node:$ptr, node:$vt),
364 (extld node:$ptr, srcvalue:$dummy, node:$vt)>;
365 def truncstore : PatFrag<(ops node:$val, node:$ptr, node:$vt),
366 (truncst node:$val, node:$ptr, srcvalue:$dummy,
369 // setcc convenience fragments.
370 def setoeq : PatFrag<(ops node:$lhs, node:$rhs),
371 (setcc node:$lhs, node:$rhs, SETOEQ)>;
372 def setogt : PatFrag<(ops node:$lhs, node:$rhs),
373 (setcc node:$lhs, node:$rhs, SETOGT)>;
374 def setoge : PatFrag<(ops node:$lhs, node:$rhs),
375 (setcc node:$lhs, node:$rhs, SETOGE)>;
376 def setolt : PatFrag<(ops node:$lhs, node:$rhs),
377 (setcc node:$lhs, node:$rhs, SETOLT)>;
378 def setole : PatFrag<(ops node:$lhs, node:$rhs),
379 (setcc node:$lhs, node:$rhs, SETOLE)>;
380 def setone : PatFrag<(ops node:$lhs, node:$rhs),
381 (setcc node:$lhs, node:$rhs, SETONE)>;
382 def seto : PatFrag<(ops node:$lhs, node:$rhs),
383 (setcc node:$lhs, node:$rhs, SETO)>;
384 def setuo : PatFrag<(ops node:$lhs, node:$rhs),
385 (setcc node:$lhs, node:$rhs, SETUO)>;
386 def setueq : PatFrag<(ops node:$lhs, node:$rhs),
387 (setcc node:$lhs, node:$rhs, SETUEQ)>;
388 def setugt : PatFrag<(ops node:$lhs, node:$rhs),
389 (setcc node:$lhs, node:$rhs, SETUGT)>;
390 def setuge : PatFrag<(ops node:$lhs, node:$rhs),
391 (setcc node:$lhs, node:$rhs, SETUGE)>;
392 def setult : PatFrag<(ops node:$lhs, node:$rhs),
393 (setcc node:$lhs, node:$rhs, SETULT)>;
394 def setule : PatFrag<(ops node:$lhs, node:$rhs),
395 (setcc node:$lhs, node:$rhs, SETULE)>;
396 def setune : PatFrag<(ops node:$lhs, node:$rhs),
397 (setcc node:$lhs, node:$rhs, SETUNE)>;
398 def seteq : PatFrag<(ops node:$lhs, node:$rhs),
399 (setcc node:$lhs, node:$rhs, SETEQ)>;
400 def setgt : PatFrag<(ops node:$lhs, node:$rhs),
401 (setcc node:$lhs, node:$rhs, SETGT)>;
402 def setge : PatFrag<(ops node:$lhs, node:$rhs),
403 (setcc node:$lhs, node:$rhs, SETGE)>;
404 def setlt : PatFrag<(ops node:$lhs, node:$rhs),
405 (setcc node:$lhs, node:$rhs, SETLT)>;
406 def setle : PatFrag<(ops node:$lhs, node:$rhs),
407 (setcc node:$lhs, node:$rhs, SETLE)>;
408 def setne : PatFrag<(ops node:$lhs, node:$rhs),
409 (setcc node:$lhs, node:$rhs, SETNE)>;
411 //===----------------------------------------------------------------------===//
412 // Selection DAG Pattern Support.
414 // Patterns are what are actually matched against the target-flavored
415 // instruction selection DAG. Instructions defined by the target implicitly
416 // define patterns in most cases, but patterns can also be explicitly added when
417 // an operation is defined by a sequence of instructions (e.g. loading a large
418 // immediate value on RISC targets that do not support immediates as large as
422 class Pattern<dag patternToMatch, list<dag> resultInstrs> {
423 dag PatternToMatch = patternToMatch;
424 list<dag> ResultInstrs = resultInstrs;
425 list<Predicate> Predicates = []; // See class Instruction in Target.td.
428 // Pat - A simple (but common) form of a pattern, which produces a simple result
429 // not needing a full list.
430 class Pat<dag pattern, dag result> : Pattern<pattern, [result]>;
432 //===----------------------------------------------------------------------===//
433 // Complex pattern definitions.
435 // Complex patterns, e.g. X86 addressing mode, requires pattern matching code
436 // in C++. NumOperands is the number of operands returned by the select function;
437 // SelectFunc is the name of the function used to pattern match the max. pattern;
438 // RootNodes are the list of possible root nodes of the sub-dags to match.
439 // e.g. X86 addressing mode - def addr : ComplexPattern<4, "SelectAddr", [add]>;
441 class ComplexPattern<ValueType ty, int numops, string fn, list<SDNode> roots = []> {
443 int NumOperands = numops;
444 string SelectFunc = fn;
445 list<SDNode> RootNodes = roots;
448 //===----------------------------------------------------------------------===//
451 def SDT_dwarf_loc : SDTypeProfile<0, 3,
452 [SDTCisInt<0>, SDTCisInt<1>, SDTCisInt<2>]>;
453 def dwarf_loc : SDNode<"ISD::DEBUG_LOC", SDT_dwarf_loc,[SDNPHasChain]>;
455 def SDT_dwarf_label : SDTypeProfile<0, 1, [SDTCisInt<0>]>;
456 def dwarf_label : SDNode<"ISD::DEBUG_LABEL", SDT_dwarf_label,[SDNPHasChain]>;