| //===- TargetSelectionDAG.td - Common code for DAG isels ---*- tablegen -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file was developed by the LLVM research group and is distributed under |
| // the University of Illinois Open Source License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the target-independent interfaces used by SelectionDAG |
| // instruction selection generators. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Type Constraint definitions. |
| // |
| // Note that the semantics of these constraints are hard coded into tblgen. To |
| // modify or add constraints, you have to hack tblgen. |
| // |
| |
| class SDTypeConstraint<int opnum> { |
| int OperandNum = opnum; |
| } |
| |
| // SDTCisVT - The specified operand has exactly this VT. |
| class SDTCisVT <int OpNum, ValueType vt> : SDTypeConstraint<OpNum> { |
| ValueType VT = vt; |
| } |
| |
| // SDTCisInt - The specified operand is has integer type. |
| class SDTCisInt<int OpNum> : SDTypeConstraint<OpNum>; |
| |
| // SDTCisFP - The specified operand is has floating point type. |
| class SDTCisFP <int OpNum> : SDTypeConstraint<OpNum>; |
| |
| // SDTCisSameAs - The two specified operands have identical types. |
| class SDTCisSameAs<int OpNum, int OtherOp> : SDTypeConstraint<OpNum> { |
| int OtherOperandNum = OtherOp; |
| } |
| |
| // SDTCisVTSmallerThanOp - The specified operand is a VT SDNode, and its type is |
| // smaller than the 'Other' operand. |
| class SDTCisVTSmallerThanOp<int OpNum, int OtherOp> : SDTypeConstraint<OpNum> { |
| int OtherOperandNum = OtherOp; |
| } |
| |
| class SDTCisOpSmallerThanOp<int SmallOp, int BigOp> : SDTypeConstraint<SmallOp>{ |
| int BigOperandNum = BigOp; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Type Profile definitions. |
| // |
| // These use the constraints defined above to describe the type requirements of |
| // the various nodes. These are not hard coded into tblgen, allowing targets to |
| // add their own if needed. |
| // |
| |
| // SDTypeProfile - This profile describes the type requirements of a Selection |
| // DAG node. |
| class SDTypeProfile<int numresults, int numoperands, |
| list<SDTypeConstraint> constraints> { |
| int NumResults = numresults; |
| int NumOperands = numoperands; |
| list<SDTypeConstraint> Constraints = constraints; |
| } |
| |
| // Builtin profiles. |
| def SDTImm : SDTypeProfile<1, 0, [SDTCisInt<0>]>; // for 'imm'. |
| def SDTVT : SDTypeProfile<1, 0, [SDTCisVT<0, OtherVT>]>; // for 'vt'. |
| def SDTUNDEF : SDTypeProfile<1, 0, []>; // for 'undef'. |
| def SDTIntBinOp : SDTypeProfile<1, 2, [ // add, and, or, xor, udiv, etc. |
| SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisInt<0> |
| ]>; |
| def SDTFPBinOp : SDTypeProfile<1, 2, [ // fadd, fmul, etc. |
| SDTCisSameAs<0, 1>, SDTCisSameAs<0, 2>, SDTCisFP<0> |
| ]>; |
| def SDTIntUnaryOp : SDTypeProfile<1, 1, [ // ctlz |
| SDTCisSameAs<0, 1>, SDTCisInt<0> |
| ]>; |
| def SDTIntExtendOp : SDTypeProfile<1, 1, [ // sext, zext, anyext |
| SDTCisInt<0>, SDTCisInt<1>, SDTCisOpSmallerThanOp<1, 0> |
| ]>; |
| def SDTIntTruncOp : SDTypeProfile<1, 1, [ // trunc |
| SDTCisInt<0>, SDTCisInt<1>, SDTCisOpSmallerThanOp<0, 1> |
| ]>; |
| def SDTFPUnaryOp : SDTypeProfile<1, 1, [ // fneg, fsqrt, etc |
| SDTCisSameAs<0, 1>, SDTCisFP<0> |
| ]>; |
| def SDTFPRoundOp : SDTypeProfile<1, 1, [ // fround |
| SDTCisFP<0>, SDTCisFP<1>, SDTCisOpSmallerThanOp<0, 1> |
| ]>; |
| def SDTFPExtendOp : SDTypeProfile<1, 1, [ // fextend |
| SDTCisFP<0>, SDTCisFP<1>, SDTCisOpSmallerThanOp<1, 0> |
| ]>; |
| def SDTIntToFPOp : SDTypeProfile<1, 1, [ // [su]int_to_fp |
| SDTCisFP<0>, SDTCisInt<1> |
| ]>; |
| def SDTFPToIntOp : SDTypeProfile<1, 1, [ // fp_to_[su]int |
| SDTCisInt<0>, SDTCisFP<1> |
| ]>; |
| def SDTExtInreg : SDTypeProfile<1, 2, [ // sext_inreg |
| SDTCisSameAs<0, 1>, SDTCisInt<0>, SDTCisVT<2, OtherVT>, |
| SDTCisVTSmallerThanOp<2, 1> |
| ]>; |
| |
| def SDTSetCC : SDTypeProfile<1, 3, [ // setcc |
| SDTCisInt<0>, SDTCisSameAs<1, 2>, SDTCisVT<3, OtherVT> |
| ]>; |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Node Properties. |
| // |
| // Note: These are hard coded into tblgen. |
| // |
| class SDNodeProperty; |
| def SDNPCommutative : SDNodeProperty; // X op Y == Y op X |
| def SDNPAssociative : SDNodeProperty; // (X op Y) op Z == X op (Y op Z) |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Node definitions. |
| // |
| class SDNode<string opcode, SDTypeProfile typeprof, |
| list<SDNodeProperty> props = [], string sdclass = "SDNode"> { |
| string Opcode = opcode; |
| string SDClass = sdclass; |
| list<SDNodeProperty> Properties = props; |
| SDTypeProfile TypeProfile = typeprof; |
| } |
| |
| def set; |
| def node; |
| |
| def imm : SDNode<"ISD::Constant" , SDTImm , [], "ConstantSDNode">; |
| def vt : SDNode<"ISD::VALUETYPE" , SDTVT , [], "VTSDNode">; |
| def cond : SDNode<"ISD::CONDCODE" , SDTVT , [], "CondCodeSDNode">; |
| def undef : SDNode<"ISD::UNDEF" , SDTUNDEF , []>; |
| def add : SDNode<"ISD::ADD" , SDTIntBinOp , |
| [SDNPCommutative, SDNPAssociative]>; |
| def sub : SDNode<"ISD::SUB" , SDTIntBinOp>; |
| def mul : SDNode<"ISD::MUL" , SDTIntBinOp, |
| [SDNPCommutative, SDNPAssociative]>; |
| def mulhs : SDNode<"ISD::MULHS" , SDTIntBinOp, [SDNPCommutative]>; |
| def mulhu : SDNode<"ISD::MULHU" , SDTIntBinOp, [SDNPCommutative]>; |
| def sdiv : SDNode<"ISD::SDIV" , SDTIntBinOp>; |
| def udiv : SDNode<"ISD::UDIV" , SDTIntBinOp>; |
| def srem : SDNode<"ISD::SREM" , SDTIntBinOp>; |
| def urem : SDNode<"ISD::UREM" , SDTIntBinOp>; |
| def srl : SDNode<"ISD::SRL" , SDTIntBinOp>; |
| def sra : SDNode<"ISD::SRA" , SDTIntBinOp>; |
| def shl : SDNode<"ISD::SHL" , SDTIntBinOp>; |
| def and : SDNode<"ISD::AND" , SDTIntBinOp, |
| [SDNPCommutative, SDNPAssociative]>; |
| def or : SDNode<"ISD::OR" , SDTIntBinOp, |
| [SDNPCommutative, SDNPAssociative]>; |
| def xor : SDNode<"ISD::XOR" , SDTIntBinOp, |
| [SDNPCommutative, SDNPAssociative]>; |
| |
| def sext_inreg : SDNode<"ISD::SIGN_EXTEND_INREG", SDTExtInreg>; |
| def ctlz : SDNode<"ISD::CTLZ" , SDTIntUnaryOp>; |
| def cttz : SDNode<"ISD::CTTZ" , SDTIntUnaryOp>; |
| def ctpop : SDNode<"ISD::CTPOP" , SDTIntUnaryOp>; |
| def sext : SDNode<"ISD::SIGN_EXTEND", SDTIntExtendOp>; |
| def zext : SDNode<"ISD::ZERO_EXTEND", SDTIntExtendOp>; |
| def anyext : SDNode<"ISD::ANY_EXTEND" , SDTIntExtendOp>; |
| def trunc : SDNode<"ISD::TRUNCATE" , SDTIntTruncOp>; |
| |
| def fadd : SDNode<"ISD::FADD" , SDTFPBinOp, [SDNPCommutative]>; |
| def fsub : SDNode<"ISD::FSUB" , SDTFPBinOp>; |
| def fmul : SDNode<"ISD::FMUL" , SDTFPBinOp, [SDNPCommutative]>; |
| def fdiv : SDNode<"ISD::FDIV" , SDTFPBinOp>; |
| def frem : SDNode<"ISD::FREM" , SDTFPBinOp>; |
| def fabs : SDNode<"ISD::FABS" , SDTFPUnaryOp>; |
| def fneg : SDNode<"ISD::FNEG" , SDTFPUnaryOp>; |
| def fsqrt : SDNode<"ISD::FSQRT" , SDTFPUnaryOp>; |
| |
| def fround : SDNode<"ISD::FP_ROUND" , SDTFPRoundOp>; |
| def fextend : SDNode<"ISD::FP_EXTEND" , SDTFPExtendOp>; |
| |
| def sint_to_fp : SDNode<"ISD::SINT_TO_FP" , SDTIntToFPOp>; |
| def uint_to_fp : SDNode<"ISD::UINT_TO_FP" , SDTIntToFPOp>; |
| def fp_to_sint : SDNode<"ISD::FP_TO_SINT" , SDTFPToIntOp>; |
| def fp_to_uint : SDNode<"ISD::FP_TO_UINT" , SDTFPToIntOp>; |
| |
| def setcc : SDNode<"ISD::SETCC" , SDTSetCC>; |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Condition Codes |
| |
| class CondCode; // ISD::CondCode enums |
| def SETOEQ : CondCode; def SETOGT : CondCode; |
| def SETOGE : CondCode; def SETOLT : CondCode; def SETOLE : CondCode; |
| def SETONE : CondCode; def SETO : CondCode; def SETUO : CondCode; |
| def SETUEQ : CondCode; def SETUGT : CondCode; def SETUGE : CondCode; |
| def SETULT : CondCode; def SETULE : CondCode; def SETUNE : CondCode; |
| |
| def SETEQ : CondCode; def SETGT : CondCode; def SETGE : CondCode; |
| def SETLT : CondCode; def SETLE : CondCode; def SETNE : CondCode; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Node Transformation Functions. |
| // |
| // This mechanism allows targets to manipulate nodes in the output DAG once a |
| // match has been formed. This is typically used to manipulate immediate |
| // values. |
| // |
| class SDNodeXForm<SDNode opc, code xformFunction> { |
| SDNode Opcode = opc; |
| code XFormFunction = xformFunction; |
| } |
| |
| def NOOP_SDNodeXForm : SDNodeXForm<imm, [{}]>; |
| |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Pattern Fragments. |
| // |
| // Pattern fragments are reusable chunks of dags that match specific things. |
| // They can take arguments and have C++ predicates that control whether they |
| // match. They are intended to make the patterns for common instructions more |
| // compact and readable. |
| // |
| |
| /// PatFrag - Represents a pattern fragment. This can match something on the |
| /// DAG, frame a single node to multiply nested other fragments. |
| /// |
| class PatFrag<dag ops, dag frag, code pred = [{}], |
| SDNodeXForm xform = NOOP_SDNodeXForm> { |
| dag Operands = ops; |
| dag Fragment = frag; |
| code Predicate = pred; |
| SDNodeXForm OperandTransform = xform; |
| } |
| |
| // PatLeaf's are pattern fragments that have no operands. This is just a helper |
| // to define immediates and other common things concisely. |
| class PatLeaf<dag frag, code pred = [{}], SDNodeXForm xform = NOOP_SDNodeXForm> |
| : PatFrag<(ops), frag, pred, xform>; |
| |
| // Leaf fragments. |
| |
| def immAllOnes : PatLeaf<(imm), [{ return N->isAllOnesValue(); }]>; |
| |
| def vtInt : PatLeaf<(vt), [{ return MVT::isInteger(N->getVT()); }]>; |
| def vtFP : PatLeaf<(vt), [{ return MVT::isFloatingPoint(N->getVT()); }]>; |
| |
| // Other helper fragments. |
| |
| def not : PatFrag<(ops node:$in), (xor node:$in, immAllOnes)>; |
| def ineg : PatFrag<(ops node:$in), (sub 0, node:$in)>; |
| |
| |
| // setcc convenience fragments. |
| def setoeq : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETOEQ)>; |
| def setogt : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETOGT)>; |
| def setoge : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETOGE)>; |
| def setolt : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETOLT)>; |
| def setole : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETOLE)>; |
| def setone : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETONE)>; |
| def seto : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETO)>; |
| def setuo : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETUO)>; |
| def setueq : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETUEQ)>; |
| def setugt : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETUGT)>; |
| def setuge : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETUGE)>; |
| def setult : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETULT)>; |
| def setule : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETULE)>; |
| def setune : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETUNE)>; |
| def seteq : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETEQ)>; |
| def setgt : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETGT)>; |
| def setge : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETGE)>; |
| def setlt : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETLT)>; |
| def setle : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETLE)>; |
| def setne : PatFrag<(ops node:$lhs, node:$rhs), |
| (setcc node:$lhs, node:$rhs, SETNE)>; |
| |
| //===----------------------------------------------------------------------===// |
| // Selection DAG Pattern Support. |
| // |
| // Patterns are what are actually matched against the target-flavored |
| // instruction selection DAG. Instructions defined by the target implicitly |
| // define patterns in most cases, but patterns can also be explicitly added when |
| // an operation is defined by a sequence of instructions (e.g. loading a large |
| // immediate value on RISC targets that do not support immediates as large as |
| // their GPRs). |
| // |
| |
| class Pattern<dag patternToMatch, list<dag> resultInstrs> { |
| dag PatternToMatch = patternToMatch; |
| list<dag> ResultInstrs = resultInstrs; |
| } |
| |
| // Pat - A simple (but common) form of a pattern, which produces a simple result |
| // not needing a full list. |
| class Pat<dag pattern, dag result> : Pattern<pattern, [result]>; |
| |
