SelectionDAGNodes.h revision 195098
190075Sobrien//===-- llvm/CodeGen/SelectionDAGNodes.h - SelectionDAG Nodes ---*- C++ -*-===// 290075Sobrien// 390075Sobrien// The LLVM Compiler Infrastructure 490075Sobrien// 590075Sobrien// This file is distributed under the University of Illinois Open Source 690075Sobrien// License. See LICENSE.TXT for details. 790075Sobrien// 890075Sobrien//===----------------------------------------------------------------------===// 990075Sobrien// 1090075Sobrien// This file declares the SDNode class and derived classes, which are used to 1190075Sobrien// represent the nodes and operations present in a SelectionDAG. These nodes 1290075Sobrien// and operations are machine code level operations, with some similarities to 1390075Sobrien// the GCC RTL representation. 1490075Sobrien// 1590075Sobrien// Clients should include the SelectionDAG.h file instead of this file directly. 1690075Sobrien// 1790075Sobrien//===----------------------------------------------------------------------===// 1890075Sobrien 1990075Sobrien#ifndef LLVM_CODEGEN_SELECTIONDAGNODES_H 2090075Sobrien#define LLVM_CODEGEN_SELECTIONDAGNODES_H 2190075Sobrien 2290075Sobrien#include "llvm/Constants.h" 2390075Sobrien#include "llvm/ADT/FoldingSet.h" 2490075Sobrien#include "llvm/ADT/GraphTraits.h" 2590075Sobrien#include "llvm/ADT/iterator.h" 2690075Sobrien#include "llvm/ADT/ilist_node.h" 2790075Sobrien#include "llvm/ADT/SmallVector.h" 2890075Sobrien#include "llvm/ADT/STLExtras.h" 2990075Sobrien#include "llvm/CodeGen/ValueTypes.h" 3090075Sobrien#include "llvm/CodeGen/MachineMemOperand.h" 3190075Sobrien#include "llvm/Support/Allocator.h" 3290075Sobrien#include "llvm/Support/RecyclingAllocator.h" 3390075Sobrien#include "llvm/Support/DataTypes.h" 3490075Sobrien#include "llvm/Support/DebugLoc.h" 3590075Sobrien#include <cassert> 3690075Sobrien#include <climits> 3790075Sobrien 3890075Sobriennamespace llvm { 3990075Sobrien 4090075Sobrienclass SelectionDAG; 4190075Sobrienclass GlobalValue; 4290075Sobrienclass MachineBasicBlock; 4390075Sobrienclass MachineConstantPoolValue; 4490075Sobrienclass SDNode; 4590075Sobrienclass Value; 4690075Sobrientemplate <typename T> struct DenseMapInfo; 4790075Sobrientemplate <typename T> struct simplify_type; 4890075Sobrientemplate <typename T> struct ilist_traits; 4990075Sobrien 5090075Sobrien/// SDVTList - This represents a list of ValueType's that has been intern'd by 5190075Sobrien/// a SelectionDAG. Instances of this simple value class are returned by 5290075Sobrien/// SelectionDAG::getVTList(...). 5390075Sobrien/// 5490075Sobrienstruct SDVTList { 5590075Sobrien const MVT *VTs; 5690075Sobrien unsigned int NumVTs; 5790075Sobrien}; 5890075Sobrien 5990075Sobrien/// ISD namespace - This namespace contains an enum which represents all of the 6090075Sobrien/// SelectionDAG node types and value types. 6190075Sobrien/// 6290075Sobriennamespace ISD { 6390075Sobrien 6490075Sobrien //===--------------------------------------------------------------------===// 6590075Sobrien /// ISD::NodeType enum - This enum defines the target-independent operators 6690075Sobrien /// for a SelectionDAG. 6790075Sobrien /// 6890075Sobrien /// Targets may also define target-dependent operator codes for SDNodes. For 6990075Sobrien /// example, on x86, these are the enum values in the X86ISD namespace. 7090075Sobrien /// Targets should aim to use target-independent operators to model their 7190075Sobrien /// instruction sets as much as possible, and only use target-dependent 7290075Sobrien /// operators when they have special requirements. 7390075Sobrien /// 7490075Sobrien /// Finally, during and after selection proper, SNodes may use special 7590075Sobrien /// operator codes that correspond directly with MachineInstr opcodes. These 7690075Sobrien /// are used to represent selected instructions. See the isMachineOpcode() 7790075Sobrien /// and getMachineOpcode() member functions of SDNode. 7890075Sobrien /// 7990075Sobrien enum NodeType { 8090075Sobrien // DELETED_NODE - This is an illegal value that is used to catch 8190075Sobrien // errors. This opcode is not a legal opcode for any node. 8290075Sobrien DELETED_NODE, 8390075Sobrien 8490075Sobrien // EntryToken - This is the marker used to indicate the start of the region. 8590075Sobrien EntryToken, 8690075Sobrien 8790075Sobrien // TokenFactor - This node takes multiple tokens as input and produces a 8890075Sobrien // single token result. This is used to represent the fact that the operand 8990075Sobrien // operators are independent of each other. 9090075Sobrien TokenFactor, 9190075Sobrien 9290075Sobrien // AssertSext, AssertZext - These nodes record if a register contains a 9390075Sobrien // value that has already been zero or sign extended from a narrower type. 9490075Sobrien // These nodes take two operands. The first is the node that has already 9590075Sobrien // been extended, and the second is a value type node indicating the width 9690075Sobrien // of the extension 9790075Sobrien AssertSext, AssertZext, 9890075Sobrien 9990075Sobrien // Various leaf nodes. 10090075Sobrien BasicBlock, VALUETYPE, ARG_FLAGS, CONDCODE, Register, 10190075Sobrien Constant, ConstantFP, 10290075Sobrien GlobalAddress, GlobalTLSAddress, FrameIndex, 10390075Sobrien JumpTable, ConstantPool, ExternalSymbol, 10490075Sobrien 10590075Sobrien // The address of the GOT 10690075Sobrien GLOBAL_OFFSET_TABLE, 10790075Sobrien 10890075Sobrien // FRAMEADDR, RETURNADDR - These nodes represent llvm.frameaddress and 10990075Sobrien // llvm.returnaddress on the DAG. These nodes take one operand, the index 11090075Sobrien // of the frame or return address to return. An index of zero corresponds 11190075Sobrien // to the current function's frame or return address, an index of one to the 11290075Sobrien // parent's frame or return address, and so on. 11390075Sobrien FRAMEADDR, RETURNADDR, 11490075Sobrien 11590075Sobrien // FRAME_TO_ARGS_OFFSET - This node represents offset from frame pointer to 11690075Sobrien // first (possible) on-stack argument. This is needed for correct stack 11790075Sobrien // adjustment during unwind. 11890075Sobrien FRAME_TO_ARGS_OFFSET, 11990075Sobrien 12090075Sobrien // RESULT, OUTCHAIN = EXCEPTIONADDR(INCHAIN) - This node represents the 12190075Sobrien // address of the exception block on entry to an landing pad block. 12290075Sobrien EXCEPTIONADDR, 12390075Sobrien 12490075Sobrien // RESULT, OUTCHAIN = EHSELECTION(INCHAIN, EXCEPTION) - This node represents 12590075Sobrien // the selection index of the exception thrown. 12690075Sobrien EHSELECTION, 12790075Sobrien 12890075Sobrien // OUTCHAIN = EH_RETURN(INCHAIN, OFFSET, HANDLER) - This node represents 12990075Sobrien // 'eh_return' gcc dwarf builtin, which is used to return from 13090075Sobrien // exception. The general meaning is: adjust stack by OFFSET and pass 13190075Sobrien // execution to HANDLER. Many platform-related details also :) 13290075Sobrien EH_RETURN, 13390075Sobrien 13490075Sobrien // TargetConstant* - Like Constant*, but the DAG does not do any folding or 13590075Sobrien // simplification of the constant. 13690075Sobrien TargetConstant, 13790075Sobrien TargetConstantFP, 13890075Sobrien 13990075Sobrien // TargetGlobalAddress - Like GlobalAddress, but the DAG does no folding or 14090075Sobrien // anything else with this node, and this is valid in the target-specific 14190075Sobrien // dag, turning into a GlobalAddress operand. 14290075Sobrien TargetGlobalAddress, 14390075Sobrien TargetGlobalTLSAddress, 14490075Sobrien TargetFrameIndex, 14590075Sobrien TargetJumpTable, 14690075Sobrien TargetConstantPool, 14790075Sobrien TargetExternalSymbol, 14890075Sobrien 14990075Sobrien /// RESULT = INTRINSIC_WO_CHAIN(INTRINSICID, arg1, arg2, ...) 15090075Sobrien /// This node represents a target intrinsic function with no side effects. 15190075Sobrien /// The first operand is the ID number of the intrinsic from the 15290075Sobrien /// llvm::Intrinsic namespace. The operands to the intrinsic follow. The 15390075Sobrien /// node has returns the result of the intrinsic. 15490075Sobrien INTRINSIC_WO_CHAIN, 15590075Sobrien 15690075Sobrien /// RESULT,OUTCHAIN = INTRINSIC_W_CHAIN(INCHAIN, INTRINSICID, arg1, ...) 15790075Sobrien /// This node represents a target intrinsic function with side effects that 15890075Sobrien /// returns a result. The first operand is a chain pointer. The second is 15990075Sobrien /// the ID number of the intrinsic from the llvm::Intrinsic namespace. The 16090075Sobrien /// operands to the intrinsic follow. The node has two results, the result 16190075Sobrien /// of the intrinsic and an output chain. 16290075Sobrien INTRINSIC_W_CHAIN, 16390075Sobrien 16490075Sobrien /// OUTCHAIN = INTRINSIC_VOID(INCHAIN, INTRINSICID, arg1, arg2, ...) 16590075Sobrien /// This node represents a target intrinsic function with side effects that 16690075Sobrien /// does not return a result. The first operand is a chain pointer. The 16790075Sobrien /// second is the ID number of the intrinsic from the llvm::Intrinsic 16890075Sobrien /// namespace. The operands to the intrinsic follow. 16990075Sobrien INTRINSIC_VOID, 17090075Sobrien 17190075Sobrien // CopyToReg - This node has three operands: a chain, a register number to 17290075Sobrien // set to this value, and a value. 17390075Sobrien CopyToReg, 17490075Sobrien 17590075Sobrien // CopyFromReg - This node indicates that the input value is a virtual or 17690075Sobrien // physical register that is defined outside of the scope of this 17790075Sobrien // SelectionDAG. The register is available from the RegisterSDNode object. 17890075Sobrien CopyFromReg, 17990075Sobrien 18090075Sobrien // UNDEF - An undefined node 18190075Sobrien UNDEF, 18290075Sobrien 18390075Sobrien /// FORMAL_ARGUMENTS(CHAIN, CC#, ISVARARG, FLAG0, ..., FLAGn) - This node 18490075Sobrien /// represents the formal arguments for a function. CC# is a Constant value 18590075Sobrien /// indicating the calling convention of the function, and ISVARARG is a 18690075Sobrien /// flag that indicates whether the function is varargs or not. This node 18790075Sobrien /// has one result value for each incoming argument, plus one for the output 18890075Sobrien /// chain. It must be custom legalized. See description of CALL node for 18990075Sobrien /// FLAG argument contents explanation. 19090075Sobrien /// 19190075Sobrien FORMAL_ARGUMENTS, 19290075Sobrien 19390075Sobrien /// RV1, RV2...RVn, CHAIN = CALL(CHAIN, CALLEE, 19490075Sobrien /// ARG0, FLAG0, ARG1, FLAG1, ... ARGn, FLAGn) 19590075Sobrien /// This node represents a fully general function call, before the legalizer 19690075Sobrien /// runs. This has one result value for each argument / flag pair, plus 19790075Sobrien /// a chain result. It must be custom legalized. Flag argument indicates 19890075Sobrien /// misc. argument attributes. Currently: 19990075Sobrien /// Bit 0 - signness 20090075Sobrien /// Bit 1 - 'inreg' attribute 20190075Sobrien /// Bit 2 - 'sret' attribute 20290075Sobrien /// Bit 4 - 'byval' attribute 20390075Sobrien /// Bit 5 - 'nest' attribute 20490075Sobrien /// Bit 6-9 - alignment of byval structures 20590075Sobrien /// Bit 10-26 - size of byval structures 20690075Sobrien /// Bits 31:27 - argument ABI alignment in the first argument piece and 20790075Sobrien /// alignment '1' in other argument pieces. 20890075Sobrien /// 20990075Sobrien /// CALL nodes use the CallSDNode subclass of SDNode, which 21090075Sobrien /// additionally carries information about the calling convention, 21190075Sobrien /// whether the call is varargs, and if it's marked as a tail call. 21290075Sobrien /// 21390075Sobrien CALL, 21490075Sobrien 21590075Sobrien // EXTRACT_ELEMENT - This is used to get the lower or upper (determined by 21690075Sobrien // a Constant, which is required to be operand #1) half of the integer or 21790075Sobrien // float value specified as operand #0. This is only for use before 21890075Sobrien // legalization, for values that will be broken into multiple registers. 21990075Sobrien EXTRACT_ELEMENT, 22090075Sobrien 22190075Sobrien // BUILD_PAIR - This is the opposite of EXTRACT_ELEMENT in some ways. Given 22290075Sobrien // two values of the same integer value type, this produces a value twice as 22390075Sobrien // big. Like EXTRACT_ELEMENT, this can only be used before legalization. 22490075Sobrien BUILD_PAIR, 225117395Skan 22690075Sobrien // MERGE_VALUES - This node takes multiple discrete operands and returns 22790075Sobrien // them all as its individual results. This nodes has exactly the same 22890075Sobrien // number of inputs and outputs, and is only valid before legalization. 22990075Sobrien // This node is useful for some pieces of the code generator that want to 23090075Sobrien // think about a single node with multiple results, not multiple nodes. 23190075Sobrien MERGE_VALUES, 23290075Sobrien 23390075Sobrien // Simple integer binary arithmetic operators. 23490075Sobrien ADD, SUB, MUL, SDIV, UDIV, SREM, UREM, 23590075Sobrien 23690075Sobrien // SMUL_LOHI/UMUL_LOHI - Multiply two integers of type iN, producing 237117395Skan // a signed/unsigned value of type i[2*N], and return the full value as 238117395Skan // two results, each of type iN. 23990075Sobrien SMUL_LOHI, UMUL_LOHI, 24090075Sobrien 24190075Sobrien // SDIVREM/UDIVREM - Divide two integers and produce both a quotient and 24290075Sobrien // remainder result. 24390075Sobrien SDIVREM, UDIVREM, 24490075Sobrien 24590075Sobrien // CARRY_FALSE - This node is used when folding other nodes, 24690075Sobrien // like ADDC/SUBC, which indicate the carry result is always false. 24790075Sobrien CARRY_FALSE, 24890075Sobrien 24990075Sobrien // Carry-setting nodes for multiple precision addition and subtraction. 25090075Sobrien // These nodes take two operands of the same value type, and produce two 25190075Sobrien // results. The first result is the normal add or sub result, the second 25290075Sobrien // result is the carry flag result. 25390075Sobrien ADDC, SUBC, 25490075Sobrien 25590075Sobrien // Carry-using nodes for multiple precision addition and subtraction. These 25690075Sobrien // nodes take three operands: The first two are the normal lhs and rhs to 25790075Sobrien // the add or sub, and the third is the input carry flag. These nodes 25890075Sobrien // produce two results; the normal result of the add or sub, and the output 25990075Sobrien // carry flag. These nodes both read and write a carry flag to allow them 26090075Sobrien // to them to be chained together for add and sub of arbitrarily large 26190075Sobrien // values. 26290075Sobrien ADDE, SUBE, 26390075Sobrien 26490075Sobrien // RESULT, BOOL = [SU]ADDO(LHS, RHS) - Overflow-aware nodes for addition. 26590075Sobrien // These nodes take two operands: the normal LHS and RHS to the add. They 26690075Sobrien // produce two results: the normal result of the add, and a boolean that 26790075Sobrien // indicates if an overflow occured (*not* a flag, because it may be stored 26890075Sobrien // to memory, etc.). If the type of the boolean is not i1 then the high 26990075Sobrien // bits conform to getBooleanContents. 27090075Sobrien // These nodes are generated from the llvm.[su]add.with.overflow intrinsics. 27190075Sobrien SADDO, UADDO, 27290075Sobrien 27390075Sobrien // Same for subtraction 27490075Sobrien SSUBO, USUBO, 27590075Sobrien 27690075Sobrien // Same for multiplication 27790075Sobrien SMULO, UMULO, 27890075Sobrien 27990075Sobrien // Simple binary floating point operators. 28090075Sobrien FADD, FSUB, FMUL, FDIV, FREM, 28190075Sobrien 282117395Skan // FCOPYSIGN(X, Y) - Return the value of X with the sign of Y. NOTE: This 28390075Sobrien // DAG node does not require that X and Y have the same type, just that they 28490075Sobrien // are both floating point. X and the result must have the same type. 28590075Sobrien // FCOPYSIGN(f32, f64) is allowed. 28690075Sobrien FCOPYSIGN, 28790075Sobrien 28890075Sobrien // INT = FGETSIGN(FP) - Return the sign bit of the specified floating point 28990075Sobrien // value as an integer 0/1 value. 29090075Sobrien FGETSIGN, 29190075Sobrien 29290075Sobrien /// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a vector with the 29390075Sobrien /// specified, possibly variable, elements. The number of elements is 29490075Sobrien /// required to be a power of two. The types of the operands must all be 29590075Sobrien /// the same and must match the vector element type, except that integer 29690075Sobrien /// types are allowed to be larger than the element type, in which case 29790075Sobrien /// the operands are implicitly truncated. 29890075Sobrien BUILD_VECTOR, 29990075Sobrien 30090075Sobrien /// INSERT_VECTOR_ELT(VECTOR, VAL, IDX) - Returns VECTOR with the element 30190075Sobrien /// at IDX replaced with VAL. If the type of VAL is larger than the vector 30290075Sobrien /// element type then VAL is truncated before replacement. 30390075Sobrien INSERT_VECTOR_ELT, 30490075Sobrien 30590075Sobrien /// EXTRACT_VECTOR_ELT(VECTOR, IDX) - Returns a single element from VECTOR 30690075Sobrien /// identified by the (potentially variable) element number IDX. 30790075Sobrien EXTRACT_VECTOR_ELT, 30890075Sobrien 30990075Sobrien /// CONCAT_VECTORS(VECTOR0, VECTOR1, ...) - Given a number of values of 31090075Sobrien /// vector type with the same length and element type, this produces a 31190075Sobrien /// concatenated vector result value, with length equal to the sum of the 31290075Sobrien /// lengths of the input vectors. 31390075Sobrien CONCAT_VECTORS, 31490075Sobrien 315117395Skan /// EXTRACT_SUBVECTOR(VECTOR, IDX) - Returns a subvector from VECTOR (an 31690075Sobrien /// vector value) starting with the (potentially variable) element number 31790075Sobrien /// IDX, which must be a multiple of the result vector length. 31890075Sobrien EXTRACT_SUBVECTOR, 31990075Sobrien 32090075Sobrien /// VECTOR_SHUFFLE(VEC1, VEC2) - Returns a vector, of the same type as 32190075Sobrien /// VEC1/VEC2. A VECTOR_SHUFFLE node also contains an array of constant int 32290075Sobrien /// values that indicate which value (or undef) each result element will 32390075Sobrien /// get. These constant ints are accessible through the 32490075Sobrien /// ShuffleVectorSDNode class. This is quite similar to the Altivec 32590075Sobrien /// 'vperm' instruction, except that the indices must be constants and are 32690075Sobrien /// in terms of the element size of VEC1/VEC2, not in terms of bytes. 32790075Sobrien VECTOR_SHUFFLE, 32890075Sobrien 32990075Sobrien /// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a 33090075Sobrien /// scalar value into element 0 of the resultant vector type. The top 33190075Sobrien /// elements 1 to N-1 of the N-element vector are undefined. The type 33290075Sobrien /// of the operand must match the vector element type, except when they 33390075Sobrien /// are integer types. In this case the operand is allowed to be wider 33490075Sobrien /// than the vector element type, and is implicitly truncated to it. 33590075Sobrien SCALAR_TO_VECTOR, 33690075Sobrien 33790075Sobrien // MULHU/MULHS - Multiply high - Multiply two integers of type iN, producing 33890075Sobrien // an unsigned/signed value of type i[2*N], then return the top part. 33990075Sobrien MULHU, MULHS, 34090075Sobrien 34190075Sobrien // Bitwise operators - logical and, logical or, logical xor, shift left, 34290075Sobrien // shift right algebraic (shift in sign bits), shift right logical (shift in 34390075Sobrien // zeroes), rotate left, rotate right, and byteswap. 34490075Sobrien AND, OR, XOR, SHL, SRA, SRL, ROTL, ROTR, BSWAP, 34590075Sobrien 34690075Sobrien // Counting operators 34790075Sobrien CTTZ, CTLZ, CTPOP, 34890075Sobrien 34990075Sobrien // Select(COND, TRUEVAL, FALSEVAL). If the type of the boolean COND is not 35090075Sobrien // i1 then the high bits must conform to getBooleanContents. 35190075Sobrien SELECT, 35290075Sobrien 35390075Sobrien // Select with condition operator - This selects between a true value and 35490075Sobrien // a false value (ops #2 and #3) based on the boolean result of comparing 35590075Sobrien // the lhs and rhs (ops #0 and #1) of a conditional expression with the 35690075Sobrien // condition code in op #4, a CondCodeSDNode. 35790075Sobrien SELECT_CC, 35890075Sobrien 35990075Sobrien // SetCC operator - This evaluates to a true value iff the condition is 36090075Sobrien // true. If the result value type is not i1 then the high bits conform 36190075Sobrien // to getBooleanContents. The operands to this are the left and right 36290075Sobrien // operands to compare (ops #0, and #1) and the condition code to compare 36390075Sobrien // them with (op #2) as a CondCodeSDNode. 36490075Sobrien SETCC, 36590075Sobrien 36690075Sobrien // Vector SetCC operator - This evaluates to a vector of integer elements 36790075Sobrien // with the high bit in each element set to true if the comparison is true 36890075Sobrien // and false if the comparison is false. All other bits in each element 36990075Sobrien // are undefined. The operands to this are the left and right operands 37090075Sobrien // to compare (ops #0, and #1) and the condition code to compare them with 37190075Sobrien // (op #2) as a CondCodeSDNode. 37290075Sobrien VSETCC, 37390075Sobrien 37490075Sobrien // SHL_PARTS/SRA_PARTS/SRL_PARTS - These operators are used for expanded 37590075Sobrien // integer shift operations, just like ADD/SUB_PARTS. The operation 37690075Sobrien // ordering is: 37790075Sobrien // [Lo,Hi] = op [LoLHS,HiLHS], Amt 37890075Sobrien SHL_PARTS, SRA_PARTS, SRL_PARTS, 37990075Sobrien 38090075Sobrien // Conversion operators. These are all single input single output 38190075Sobrien // operations. For all of these, the result type must be strictly 38290075Sobrien // wider or narrower (depending on the operation) than the source 38390075Sobrien // type. 38490075Sobrien 38590075Sobrien // SIGN_EXTEND - Used for integer types, replicating the sign bit 38690075Sobrien // into new bits. 38790075Sobrien SIGN_EXTEND, 38890075Sobrien 38990075Sobrien // ZERO_EXTEND - Used for integer types, zeroing the new bits. 39090075Sobrien ZERO_EXTEND, 39190075Sobrien 39290075Sobrien // ANY_EXTEND - Used for integer types. The high bits are undefined. 39390075Sobrien ANY_EXTEND, 39490075Sobrien 39590075Sobrien // TRUNCATE - Completely drop the high bits. 39690075Sobrien TRUNCATE, 39790075Sobrien 39890075Sobrien // [SU]INT_TO_FP - These operators convert integers (whose interpreted sign 39990075Sobrien // depends on the first letter) to floating point. 40090075Sobrien SINT_TO_FP, 40190075Sobrien UINT_TO_FP, 40290075Sobrien 40390075Sobrien // SIGN_EXTEND_INREG - This operator atomically performs a SHL/SRA pair to 40490075Sobrien // sign extend a small value in a large integer register (e.g. sign 40590075Sobrien // extending the low 8 bits of a 32-bit register to fill the top 24 bits 40690075Sobrien // with the 7th bit). The size of the smaller type is indicated by the 1th 40790075Sobrien // operand, a ValueType node. 40890075Sobrien SIGN_EXTEND_INREG, 40990075Sobrien 41090075Sobrien /// FP_TO_[US]INT - Convert a floating point value to a signed or unsigned 41190075Sobrien /// integer. 41290075Sobrien FP_TO_SINT, 41390075Sobrien FP_TO_UINT, 41490075Sobrien 41590075Sobrien /// X = FP_ROUND(Y, TRUNC) - Rounding 'Y' from a larger floating point type 41690075Sobrien /// down to the precision of the destination VT. TRUNC is a flag, which is 41790075Sobrien /// always an integer that is zero or one. If TRUNC is 0, this is a 41890075Sobrien /// normal rounding, if it is 1, this FP_ROUND is known to not change the 41990075Sobrien /// value of Y. 42090075Sobrien /// 42190075Sobrien /// The TRUNC = 1 case is used in cases where we know that the value will 42290075Sobrien /// not be modified by the node, because Y is not using any of the extra 42390075Sobrien /// precision of source type. This allows certain transformations like 42490075Sobrien /// FP_EXTEND(FP_ROUND(X,1)) -> X which are not safe for 42590075Sobrien /// FP_EXTEND(FP_ROUND(X,0)) because the extra bits aren't removed. 42690075Sobrien FP_ROUND, 42790075Sobrien 42890075Sobrien // FLT_ROUNDS_ - Returns current rounding mode: 42990075Sobrien // -1 Undefined 43090075Sobrien // 0 Round to 0 43190075Sobrien // 1 Round to nearest 43290075Sobrien // 2 Round to +inf 43390075Sobrien // 3 Round to -inf 43490075Sobrien FLT_ROUNDS_, 43590075Sobrien 43690075Sobrien /// X = FP_ROUND_INREG(Y, VT) - This operator takes an FP register, and 43790075Sobrien /// rounds it to a floating point value. It then promotes it and returns it 43890075Sobrien /// in a register of the same size. This operation effectively just 43990075Sobrien /// discards excess precision. The type to round down to is specified by 44090075Sobrien /// the VT operand, a VTSDNode. 44190075Sobrien FP_ROUND_INREG, 44290075Sobrien 44390075Sobrien /// X = FP_EXTEND(Y) - Extend a smaller FP type into a larger FP type. 44490075Sobrien FP_EXTEND, 44590075Sobrien 44690075Sobrien // BIT_CONVERT - Theis operator converts between integer and FP values, as 44790075Sobrien // if one was stored to memory as integer and the other was loaded from the 44890075Sobrien // same address (or equivalently for vector format conversions, etc). The 44990075Sobrien // source and result are required to have the same bit size (e.g. 450117395Skan // f32 <-> i32). This can also be used for int-to-int or fp-to-fp 45190075Sobrien // conversions, but that is a noop, deleted by getNode(). 45290075Sobrien BIT_CONVERT, 45390075Sobrien 45490075Sobrien // CONVERT_RNDSAT - This operator is used to support various conversions 45590075Sobrien // between various types (float, signed, unsigned and vectors of those 45690075Sobrien // types) with rounding and saturation. NOTE: Avoid using this operator as 45790075Sobrien // most target don't support it and the operator might be removed in the 45890075Sobrien // future. It takes the following arguments: 45990075Sobrien // 0) value 46090075Sobrien // 1) dest type (type to convert to) 46190075Sobrien // 2) src type (type to convert from) 46290075Sobrien // 3) rounding imm 46390075Sobrien // 4) saturation imm 46490075Sobrien // 5) ISD::CvtCode indicating the type of conversion to do 46590075Sobrien CONVERT_RNDSAT, 46690075Sobrien 46790075Sobrien // FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI, FPOW, 46890075Sobrien // FLOG, FLOG2, FLOG10, FEXP, FEXP2, 46990075Sobrien // FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR - Perform various unary floating 47090075Sobrien // point operations. These are inspired by libm. 47190075Sobrien FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI, FPOW, 47290075Sobrien FLOG, FLOG2, FLOG10, FEXP, FEXP2, 47390075Sobrien FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR, 47490075Sobrien 47590075Sobrien // LOAD and STORE have token chains as their first operand, then the same 47690075Sobrien // operands as an LLVM load/store instruction, then an offset node that 47790075Sobrien // is added / subtracted from the base pointer to form the address (for 47890075Sobrien // indexed memory ops). 47990075Sobrien LOAD, STORE, 48090075Sobrien 48190075Sobrien // DYNAMIC_STACKALLOC - Allocate some number of bytes on the stack aligned 48290075Sobrien // to a specified boundary. This node always has two return values: a new 48390075Sobrien // stack pointer value and a chain. The first operand is the token chain, 48490075Sobrien // the second is the number of bytes to allocate, and the third is the 48590075Sobrien // alignment boundary. The size is guaranteed to be a multiple of the stack 48690075Sobrien // alignment, and the alignment is guaranteed to be bigger than the stack 48790075Sobrien // alignment (if required) or 0 to get standard stack alignment. 48890075Sobrien DYNAMIC_STACKALLOC, 48990075Sobrien 49090075Sobrien // Control flow instructions. These all have token chains. 49190075Sobrien 49290075Sobrien // BR - Unconditional branch. The first operand is the chain 49390075Sobrien // operand, the second is the MBB to branch to. 49490075Sobrien BR, 49590075Sobrien 49690075Sobrien // BRIND - Indirect branch. The first operand is the chain, the second 49790075Sobrien // is the value to branch to, which must be of the same type as the target's 49890075Sobrien // pointer type. 49990075Sobrien BRIND, 50090075Sobrien 50190075Sobrien // BR_JT - Jumptable branch. The first operand is the chain, the second 50290075Sobrien // is the jumptable index, the last one is the jumptable entry index. 50390075Sobrien BR_JT, 50490075Sobrien 50590075Sobrien // BRCOND - Conditional branch. The first operand is the chain, the 50690075Sobrien // second is the condition, the third is the block to branch to if the 50790075Sobrien // condition is true. If the type of the condition is not i1, then the 50890075Sobrien // high bits must conform to getBooleanContents. 50990075Sobrien BRCOND, 51090075Sobrien 51190075Sobrien // BR_CC - Conditional branch. The behavior is like that of SELECT_CC, in 51290075Sobrien // that the condition is represented as condition code, and two nodes to 51390075Sobrien // compare, rather than as a combined SetCC node. The operands in order are 51490075Sobrien // chain, cc, lhs, rhs, block to branch to if condition is true. 51590075Sobrien BR_CC, 51690075Sobrien 51790075Sobrien // RET - Return from function. The first operand is the chain, 51890075Sobrien // and any subsequent operands are pairs of return value and return value 51990075Sobrien // attributes (see CALL for description of attributes) for the function. 52090075Sobrien // This operation can have variable number of operands. 52190075Sobrien RET, 52290075Sobrien 52390075Sobrien // INLINEASM - Represents an inline asm block. This node always has two 52490075Sobrien // return values: a chain and a flag result. The inputs are as follows: 52590075Sobrien // Operand #0 : Input chain. 52690075Sobrien // Operand #1 : a ExternalSymbolSDNode with a pointer to the asm string. 52790075Sobrien // Operand #2n+2: A RegisterNode. 52890075Sobrien // Operand #2n+3: A TargetConstant, indicating if the reg is a use/def 52990075Sobrien // Operand #last: Optional, an incoming flag. 53090075Sobrien INLINEASM, 53190075Sobrien 53290075Sobrien // DBG_LABEL, EH_LABEL - Represents a label in mid basic block used to track 53390075Sobrien // locations needed for debug and exception handling tables. These nodes 53490075Sobrien // take a chain as input and return a chain. 53590075Sobrien DBG_LABEL, 53690075Sobrien EH_LABEL, 53790075Sobrien 53890075Sobrien // DECLARE - Represents a llvm.dbg.declare intrinsic. It's used to track 53990075Sobrien // local variable declarations for debugging information. First operand is 54090075Sobrien // a chain, while the next two operands are first two arguments (address 54190075Sobrien // and variable) of a llvm.dbg.declare instruction. 54290075Sobrien DECLARE, 54390075Sobrien 54490075Sobrien // STACKSAVE - STACKSAVE has one operand, an input chain. It produces a 54590075Sobrien // value, the same type as the pointer type for the system, and an output 54690075Sobrien // chain. 54790075Sobrien STACKSAVE, 54890075Sobrien 54990075Sobrien // STACKRESTORE has two operands, an input chain and a pointer to restore to 55090075Sobrien // it returns an output chain. 55190075Sobrien STACKRESTORE, 55290075Sobrien 55390075Sobrien // CALLSEQ_START/CALLSEQ_END - These operators mark the beginning and end of 55490075Sobrien // a call sequence, and carry arbitrary information that target might want 55590075Sobrien // to know. The first operand is a chain, the rest are specified by the 55690075Sobrien // target and not touched by the DAG optimizers. 55790075Sobrien // CALLSEQ_START..CALLSEQ_END pairs may not be nested. 55890075Sobrien CALLSEQ_START, // Beginning of a call sequence 55990075Sobrien CALLSEQ_END, // End of a call sequence 56090075Sobrien 56190075Sobrien // VAARG - VAARG has three operands: an input chain, a pointer, and a 56290075Sobrien // SRCVALUE. It returns a pair of values: the vaarg value and a new chain. 56390075Sobrien VAARG, 56490075Sobrien 56590075Sobrien // VACOPY - VACOPY has five operands: an input chain, a destination pointer, 56690075Sobrien // a source pointer, a SRCVALUE for the destination, and a SRCVALUE for the 56790075Sobrien // source. 56890075Sobrien VACOPY, 56990075Sobrien 57090075Sobrien // VAEND, VASTART - VAEND and VASTART have three operands: an input chain, a 57190075Sobrien // pointer, and a SRCVALUE. 57290075Sobrien VAEND, VASTART, 57390075Sobrien 57490075Sobrien // SRCVALUE - This is a node type that holds a Value* that is used to 57590075Sobrien // make reference to a value in the LLVM IR. 57690075Sobrien SRCVALUE, 57790075Sobrien 57890075Sobrien // MEMOPERAND - This is a node that contains a MachineMemOperand which 57990075Sobrien // records information about a memory reference. This is used to make 58090075Sobrien // AliasAnalysis queries from the backend. 58190075Sobrien MEMOPERAND, 58290075Sobrien 58390075Sobrien // PCMARKER - This corresponds to the pcmarker intrinsic. 58490075Sobrien PCMARKER, 58590075Sobrien 58690075Sobrien // READCYCLECOUNTER - This corresponds to the readcyclecounter intrinsic. 58790075Sobrien // The only operand is a chain and a value and a chain are produced. The 58890075Sobrien // value is the contents of the architecture specific cycle counter like 58990075Sobrien // register (or other high accuracy low latency clock source) 59090075Sobrien READCYCLECOUNTER, 59190075Sobrien 59290075Sobrien // HANDLENODE node - Used as a handle for various purposes. 59390075Sobrien HANDLENODE, 59490075Sobrien 59590075Sobrien // DBG_STOPPOINT - This node is used to represent a source location for 59690075Sobrien // debug info. It takes token chain as input, and carries a line number, 59790075Sobrien // column number, and a pointer to a CompileUnit object identifying 59890075Sobrien // the containing compilation unit. It produces a token chain as output. 59990075Sobrien DBG_STOPPOINT, 60090075Sobrien 60190075Sobrien // DEBUG_LOC - This node is used to represent source line information 60290075Sobrien // embedded in the code. It takes a token chain as input, then a line 60390075Sobrien // number, then a column then a file id (provided by MachineModuleInfo.) It 60490075Sobrien // produces a token chain as output. 60590075Sobrien DEBUG_LOC, 60690075Sobrien 60790075Sobrien // TRAMPOLINE - This corresponds to the init_trampoline intrinsic. 60890075Sobrien // It takes as input a token chain, the pointer to the trampoline, 60990075Sobrien // the pointer to the nested function, the pointer to pass for the 61090075Sobrien // 'nest' parameter, a SRCVALUE for the trampoline and another for 61190075Sobrien // the nested function (allowing targets to access the original 61290075Sobrien // Function*). It produces the result of the intrinsic and a token 61390075Sobrien // chain as output. 61490075Sobrien TRAMPOLINE, 61590075Sobrien 61690075Sobrien // TRAP - Trapping instruction 61790075Sobrien TRAP, 61890075Sobrien 61990075Sobrien // PREFETCH - This corresponds to a prefetch intrinsic. It takes chains are 62090075Sobrien // their first operand. The other operands are the address to prefetch, 62190075Sobrien // read / write specifier, and locality specifier. 62290075Sobrien PREFETCH, 62390075Sobrien 62490075Sobrien // OUTCHAIN = MEMBARRIER(INCHAIN, load-load, load-store, store-load, 62590075Sobrien // store-store, device) 62690075Sobrien // This corresponds to the memory.barrier intrinsic. 62790075Sobrien // it takes an input chain, 4 operands to specify the type of barrier, an 62890075Sobrien // operand specifying if the barrier applies to device and uncached memory 62990075Sobrien // and produces an output chain. 63090075Sobrien MEMBARRIER, 63190075Sobrien 63290075Sobrien // Val, OUTCHAIN = ATOMIC_CMP_SWAP(INCHAIN, ptr, cmp, swap) 63390075Sobrien // this corresponds to the atomic.lcs intrinsic. 63490075Sobrien // cmp is compared to *ptr, and if equal, swap is stored in *ptr. 63590075Sobrien // the return is always the original value in *ptr 63690075Sobrien ATOMIC_CMP_SWAP, 63790075Sobrien 63890075Sobrien // Val, OUTCHAIN = ATOMIC_SWAP(INCHAIN, ptr, amt) 63990075Sobrien // this corresponds to the atomic.swap intrinsic. 64090075Sobrien // amt is stored to *ptr atomically. 64190075Sobrien // the return is always the original value in *ptr 64290075Sobrien ATOMIC_SWAP, 64390075Sobrien 64490075Sobrien // Val, OUTCHAIN = ATOMIC_LOAD_[OpName](INCHAIN, ptr, amt) 64590075Sobrien // this corresponds to the atomic.load.[OpName] intrinsic. 64690075Sobrien // op(*ptr, amt) is stored to *ptr atomically. 64790075Sobrien // the return is always the original value in *ptr 64890075Sobrien ATOMIC_LOAD_ADD, 64990075Sobrien ATOMIC_LOAD_SUB, 65090075Sobrien ATOMIC_LOAD_AND, 65190075Sobrien ATOMIC_LOAD_OR, 65290075Sobrien ATOMIC_LOAD_XOR, 65390075Sobrien ATOMIC_LOAD_NAND, 65490075Sobrien ATOMIC_LOAD_MIN, 65590075Sobrien ATOMIC_LOAD_MAX, 65690075Sobrien ATOMIC_LOAD_UMIN, 65790075Sobrien ATOMIC_LOAD_UMAX, 65890075Sobrien 65990075Sobrien // BUILTIN_OP_END - This must be the last enum value in this list. 66090075Sobrien BUILTIN_OP_END 66190075Sobrien }; 66290075Sobrien 66390075Sobrien /// Node predicates 66490075Sobrien 66590075Sobrien /// isBuildVectorAllOnes - Return true if the specified node is a 66690075Sobrien /// BUILD_VECTOR where all of the elements are ~0 or undef. 66790075Sobrien bool isBuildVectorAllOnes(const SDNode *N); 66890075Sobrien 66990075Sobrien /// isBuildVectorAllZeros - Return true if the specified node is a 67090075Sobrien /// BUILD_VECTOR where all of the elements are 0 or undef. 67190075Sobrien bool isBuildVectorAllZeros(const SDNode *N); 67290075Sobrien 67390075Sobrien /// isScalarToVector - Return true if the specified node is a 67490075Sobrien /// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low 67590075Sobrien /// element is not an undef. 67690075Sobrien bool isScalarToVector(const SDNode *N); 67790075Sobrien 67890075Sobrien /// isDebugLabel - Return true if the specified node represents a debug 67990075Sobrien /// label (i.e. ISD::DBG_LABEL or TargetInstrInfo::DBG_LABEL node). 68090075Sobrien bool isDebugLabel(const SDNode *N); 68190075Sobrien 68290075Sobrien //===--------------------------------------------------------------------===// 68390075Sobrien /// MemIndexedMode enum - This enum defines the load / store indexed 68490075Sobrien /// addressing modes. 68590075Sobrien /// 68690075Sobrien /// UNINDEXED "Normal" load / store. The effective address is already 68790075Sobrien /// computed and is available in the base pointer. The offset 68890075Sobrien /// operand is always undefined. In addition to producing a 68990075Sobrien /// chain, an unindexed load produces one value (result of the 69090075Sobrien /// load); an unindexed store does not produce a value. 69190075Sobrien /// 69290075Sobrien /// PRE_INC Similar to the unindexed mode where the effective address is 69390075Sobrien /// PRE_DEC the value of the base pointer add / subtract the offset. 69490075Sobrien /// It considers the computation as being folded into the load / 69590075Sobrien /// store operation (i.e. the load / store does the address 69690075Sobrien /// computation as well as performing the memory transaction). 69790075Sobrien /// The base operand is always undefined. In addition to 69890075Sobrien /// producing a chain, pre-indexed load produces two values 69990075Sobrien /// (result of the load and the result of the address 70090075Sobrien /// computation); a pre-indexed store produces one value (result 70190075Sobrien /// of the address computation). 70290075Sobrien /// 70390075Sobrien /// POST_INC The effective address is the value of the base pointer. The 70490075Sobrien /// POST_DEC value of the offset operand is then added to / subtracted 70590075Sobrien /// from the base after memory transaction. In addition to 70690075Sobrien /// producing a chain, post-indexed load produces two values 70790075Sobrien /// (the result of the load and the result of the base +/- offset 70890075Sobrien /// computation); a post-indexed store produces one value (the 70990075Sobrien /// the result of the base +/- offset computation). 71090075Sobrien /// 71190075Sobrien enum MemIndexedMode { 71290075Sobrien UNINDEXED = 0, 71390075Sobrien PRE_INC, 71490075Sobrien PRE_DEC, 71590075Sobrien POST_INC, 71690075Sobrien POST_DEC, 71790075Sobrien LAST_INDEXED_MODE 71890075Sobrien }; 71990075Sobrien 72090075Sobrien //===--------------------------------------------------------------------===// 72190075Sobrien /// LoadExtType enum - This enum defines the three variants of LOADEXT 72290075Sobrien /// (load with extension). 72390075Sobrien /// 72490075Sobrien /// SEXTLOAD loads the integer operand and sign extends it to a larger 72596263Sobrien /// integer result type. 72690075Sobrien /// ZEXTLOAD loads the integer operand and zero extends it to a larger 72790075Sobrien /// integer result type. 72890075Sobrien /// EXTLOAD is used for three things: floating point extending loads, 72990075Sobrien /// integer extending loads [the top bits are undefined], and vector 73090075Sobrien /// extending loads [load into low elt]. 73190075Sobrien /// 73290075Sobrien enum LoadExtType { 73390075Sobrien NON_EXTLOAD = 0, 73490075Sobrien EXTLOAD, 73590075Sobrien SEXTLOAD, 73690075Sobrien ZEXTLOAD, 73790075Sobrien LAST_LOADEXT_TYPE 73890075Sobrien }; 73990075Sobrien 74090075Sobrien //===--------------------------------------------------------------------===// 74190075Sobrien /// ISD::CondCode enum - These are ordered carefully to make the bitfields 74290075Sobrien /// below work out, when considering SETFALSE (something that never exists 74390075Sobrien /// dynamically) as 0. "U" -> Unsigned (for integer operands) or Unordered 74490075Sobrien /// (for floating point), "L" -> Less than, "G" -> Greater than, "E" -> Equal 74590075Sobrien /// to. If the "N" column is 1, the result of the comparison is undefined if 74690075Sobrien /// the input is a NAN. 74790075Sobrien /// 74890075Sobrien /// All of these (except for the 'always folded ops') should be handled for 74990075Sobrien /// floating point. For integer, only the SETEQ,SETNE,SETLT,SETLE,SETGT, 75090075Sobrien /// SETGE,SETULT,SETULE,SETUGT, and SETUGE opcodes are used. 75190075Sobrien /// 75290075Sobrien /// Note that these are laid out in a specific order to allow bit-twiddling 75390075Sobrien /// to transform conditions. 75490075Sobrien enum CondCode { 75590075Sobrien // Opcode N U L G E Intuitive operation 75690075Sobrien SETFALSE, // 0 0 0 0 Always false (always folded) 75790075Sobrien SETOEQ, // 0 0 0 1 True if ordered and equal 75890075Sobrien SETOGT, // 0 0 1 0 True if ordered and greater than 75990075Sobrien SETOGE, // 0 0 1 1 True if ordered and greater than or equal 76090075Sobrien SETOLT, // 0 1 0 0 True if ordered and less than 76190075Sobrien SETOLE, // 0 1 0 1 True if ordered and less than or equal 76290075Sobrien SETONE, // 0 1 1 0 True if ordered and operands are unequal 76390075Sobrien SETO, // 0 1 1 1 True if ordered (no nans) 76490075Sobrien SETUO, // 1 0 0 0 True if unordered: isnan(X) | isnan(Y) 76590075Sobrien SETUEQ, // 1 0 0 1 True if unordered or equal 76690075Sobrien SETUGT, // 1 0 1 0 True if unordered or greater than 76790075Sobrien SETUGE, // 1 0 1 1 True if unordered, greater than, or equal 76890075Sobrien SETULT, // 1 1 0 0 True if unordered or less than 76990075Sobrien SETULE, // 1 1 0 1 True if unordered, less than, or equal 77090075Sobrien SETUNE, // 1 1 1 0 True if unordered or not equal 77190075Sobrien SETTRUE, // 1 1 1 1 Always true (always folded) 77290075Sobrien // Don't care operations: undefined if the input is a nan. 77390075Sobrien SETFALSE2, // 1 X 0 0 0 Always false (always folded) 77490075Sobrien SETEQ, // 1 X 0 0 1 True if equal 77590075Sobrien SETGT, // 1 X 0 1 0 True if greater than 77690075Sobrien SETGE, // 1 X 0 1 1 True if greater than or equal 77790075Sobrien SETLT, // 1 X 1 0 0 True if less than 77890075Sobrien SETLE, // 1 X 1 0 1 True if less than or equal 77990075Sobrien SETNE, // 1 X 1 1 0 True if not equal 78090075Sobrien SETTRUE2, // 1 X 1 1 1 Always true (always folded) 78190075Sobrien 78290075Sobrien SETCC_INVALID // Marker value. 78390075Sobrien }; 78490075Sobrien 78590075Sobrien /// isSignedIntSetCC - Return true if this is a setcc instruction that 78690075Sobrien /// performs a signed comparison when used with integer operands. 78790075Sobrien inline bool isSignedIntSetCC(CondCode Code) { 78890075Sobrien return Code == SETGT || Code == SETGE || Code == SETLT || Code == SETLE; 78990075Sobrien } 79090075Sobrien 79190075Sobrien /// isUnsignedIntSetCC - Return true if this is a setcc instruction that 79290075Sobrien /// performs an unsigned comparison when used with integer operands. 79390075Sobrien inline bool isUnsignedIntSetCC(CondCode Code) { 79490075Sobrien return Code == SETUGT || Code == SETUGE || Code == SETULT || Code == SETULE; 79590075Sobrien } 79690075Sobrien 79790075Sobrien /// isTrueWhenEqual - Return true if the specified condition returns true if 79890075Sobrien /// the two operands to the condition are equal. Note that if one of the two 79990075Sobrien /// operands is a NaN, this value is meaningless. 80090075Sobrien inline bool isTrueWhenEqual(CondCode Cond) { 80190075Sobrien return ((int)Cond & 1) != 0; 80290075Sobrien } 80390075Sobrien 80490075Sobrien /// getUnorderedFlavor - This function returns 0 if the condition is always 80590075Sobrien /// false if an operand is a NaN, 1 if the condition is always true if the 80690075Sobrien /// operand is a NaN, and 2 if the condition is undefined if the operand is a 80790075Sobrien /// NaN. 80890075Sobrien inline unsigned getUnorderedFlavor(CondCode Cond) { 80990075Sobrien return ((int)Cond >> 3) & 3; 81090075Sobrien } 81190075Sobrien 81290075Sobrien /// getSetCCInverse - Return the operation corresponding to !(X op Y), where 81390075Sobrien /// 'op' is a valid SetCC operation. 81490075Sobrien CondCode getSetCCInverse(CondCode Operation, bool isInteger); 81590075Sobrien 81690075Sobrien /// getSetCCSwappedOperands - Return the operation corresponding to (Y op X) 81790075Sobrien /// when given the operation for (X op Y). 81890075Sobrien CondCode getSetCCSwappedOperands(CondCode Operation); 81990075Sobrien 82090075Sobrien /// getSetCCOrOperation - Return the result of a logical OR between different 82190075Sobrien /// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This 82290075Sobrien /// function returns SETCC_INVALID if it is not possible to represent the 82390075Sobrien /// resultant comparison. 82490075Sobrien CondCode getSetCCOrOperation(CondCode Op1, CondCode Op2, bool isInteger); 82590075Sobrien 82690075Sobrien /// getSetCCAndOperation - Return the result of a logical AND between 82790075Sobrien /// different comparisons of identical values: ((X op1 Y) & (X op2 Y)). This 82890075Sobrien /// function returns SETCC_INVALID if it is not possible to represent the 82990075Sobrien /// resultant comparison. 83090075Sobrien CondCode getSetCCAndOperation(CondCode Op1, CondCode Op2, bool isInteger); 83190075Sobrien 83290075Sobrien //===--------------------------------------------------------------------===// 83390075Sobrien /// CvtCode enum - This enum defines the various converts CONVERT_RNDSAT 83490075Sobrien /// supports. 83590075Sobrien enum CvtCode { 83690075Sobrien CVT_FF, // Float from Float 83790075Sobrien CVT_FS, // Float from Signed 83890075Sobrien CVT_FU, // Float from Unsigned 83990075Sobrien CVT_SF, // Signed from Float 84090075Sobrien CVT_UF, // Unsigned from Float 84190075Sobrien CVT_SS, // Signed from Signed 84290075Sobrien CVT_SU, // Signed from Unsigned 84390075Sobrien CVT_US, // Unsigned from Signed 84490075Sobrien CVT_UU, // Unsigned from Unsigned 84590075Sobrien CVT_INVALID // Marker - Invalid opcode 84690075Sobrien }; 84790075Sobrien} // end llvm::ISD namespace 84890075Sobrien 84990075Sobrien 85090075Sobrien//===----------------------------------------------------------------------===// 85190075Sobrien/// SDValue - Unlike LLVM values, Selection DAG nodes may return multiple 85290075Sobrien/// values as the result of a computation. Many nodes return multiple values, 85390075Sobrien/// from loads (which define a token and a return value) to ADDC (which returns 85490075Sobrien/// a result and a carry value), to calls (which may return an arbitrary number 85590075Sobrien/// of values). 85690075Sobrien/// 85790075Sobrien/// As such, each use of a SelectionDAG computation must indicate the node that 85890075Sobrien/// computes it as well as which return value to use from that node. This pair 85990075Sobrien/// of information is represented with the SDValue value type. 86090075Sobrien/// 86190075Sobrienclass SDValue { 86290075Sobrien SDNode *Node; // The node defining the value we are using. 86390075Sobrien unsigned ResNo; // Which return value of the node we are using. 86490075Sobrienpublic: 86590075Sobrien SDValue() : Node(0), ResNo(0) {} 86690075Sobrien SDValue(SDNode *node, unsigned resno) : Node(node), ResNo(resno) {} 86790075Sobrien 86890075Sobrien /// get the index which selects a specific result in the SDNode 86990075Sobrien unsigned getResNo() const { return ResNo; } 87090075Sobrien 87190075Sobrien /// get the SDNode which holds the desired result 87290075Sobrien SDNode *getNode() const { return Node; } 87390075Sobrien 87490075Sobrien /// set the SDNode 87590075Sobrien void setNode(SDNode *N) { Node = N; } 87690075Sobrien 87790075Sobrien bool operator==(const SDValue &O) const { 87890075Sobrien return Node == O.Node && ResNo == O.ResNo; 87990075Sobrien } 88090075Sobrien bool operator!=(const SDValue &O) const { 88190075Sobrien return !operator==(O); 88290075Sobrien } 88390075Sobrien bool operator<(const SDValue &O) const { 88490075Sobrien return Node < O.Node || (Node == O.Node && ResNo < O.ResNo); 88590075Sobrien } 88690075Sobrien 88790075Sobrien SDValue getValue(unsigned R) const { 88890075Sobrien return SDValue(Node, R); 88990075Sobrien } 89090075Sobrien 89190075Sobrien // isOperandOf - Return true if this node is an operand of N. 89290075Sobrien bool isOperandOf(SDNode *N) const; 89390075Sobrien 89490075Sobrien /// getValueType - Return the ValueType of the referenced return value. 89590075Sobrien /// 89690075Sobrien inline MVT getValueType() const; 89790075Sobrien 89890075Sobrien /// getValueSizeInBits - Returns the size of the value in bits. 89990075Sobrien /// 90090075Sobrien unsigned getValueSizeInBits() const { 90190075Sobrien return getValueType().getSizeInBits(); 90290075Sobrien } 90390075Sobrien 90490075Sobrien // Forwarding methods - These forward to the corresponding methods in SDNode. 90590075Sobrien inline unsigned getOpcode() const; 90690075Sobrien inline unsigned getNumOperands() const; 90790075Sobrien inline const SDValue &getOperand(unsigned i) const; 90890075Sobrien inline uint64_t getConstantOperandVal(unsigned i) const; 90990075Sobrien inline bool isTargetOpcode() const; 91090075Sobrien inline bool isMachineOpcode() const; 91190075Sobrien inline unsigned getMachineOpcode() const; 91290075Sobrien inline const DebugLoc getDebugLoc() const; 91390075Sobrien 91490075Sobrien 91590075Sobrien /// reachesChainWithoutSideEffects - Return true if this operand (which must 91690075Sobrien /// be a chain) reaches the specified operand without crossing any 91790075Sobrien /// side-effecting instructions. In practice, this looks through token 91890075Sobrien /// factors and non-volatile loads. In order to remain efficient, this only 91990075Sobrien /// looks a couple of nodes in, it does not do an exhaustive search. 92090075Sobrien bool reachesChainWithoutSideEffects(SDValue Dest, 92190075Sobrien unsigned Depth = 2) const; 92290075Sobrien 92390075Sobrien /// use_empty - Return true if there are no nodes using value ResNo 92490075Sobrien /// of Node. 925104752Skan /// 926104752Skan inline bool use_empty() const; 927104752Skan 928104752Skan /// hasOneUse - Return true if there is exactly one node using value 929104752Skan /// ResNo of Node. 930104752Skan /// 931104752Skan inline bool hasOneUse() const; 932104752Skan}; 933104752Skan 93490075Sobrien 93590075Sobrientemplate<> struct DenseMapInfo<SDValue> { 93690075Sobrien static inline SDValue getEmptyKey() { 93790075Sobrien return SDValue((SDNode*)-1, -1U); 93890075Sobrien } 93990075Sobrien static inline SDValue getTombstoneKey() { 94090075Sobrien return SDValue((SDNode*)-1, 0); 94190075Sobrien } 94290075Sobrien static unsigned getHashValue(const SDValue &Val) { 94390075Sobrien return ((unsigned)((uintptr_t)Val.getNode() >> 4) ^ 94490075Sobrien (unsigned)((uintptr_t)Val.getNode() >> 9)) + Val.getResNo(); 94590075Sobrien } 94690075Sobrien static bool isEqual(const SDValue &LHS, const SDValue &RHS) { 94790075Sobrien return LHS == RHS; 94890075Sobrien } 94990075Sobrien static bool isPod() { return true; } 95090075Sobrien}; 95190075Sobrien 95290075Sobrien/// simplify_type specializations - Allow casting operators to work directly on 95390075Sobrien/// SDValues as if they were SDNode*'s. 95490075Sobrientemplate<> struct simplify_type<SDValue> { 95590075Sobrien typedef SDNode* SimpleType; 95690075Sobrien static SimpleType getSimplifiedValue(const SDValue &Val) { 95790075Sobrien return static_cast<SimpleType>(Val.getNode()); 95890075Sobrien } 95990075Sobrien}; 96090075Sobrientemplate<> struct simplify_type<const SDValue> { 96190075Sobrien typedef SDNode* SimpleType; 96290075Sobrien static SimpleType getSimplifiedValue(const SDValue &Val) { 96390075Sobrien return static_cast<SimpleType>(Val.getNode()); 96490075Sobrien } 96590075Sobrien}; 96690075Sobrien 96790075Sobrien/// SDUse - Represents a use of a SDNode. This class holds an SDValue, 96890075Sobrien/// which records the SDNode being used and the result number, a 96990075Sobrien/// pointer to the SDNode using the value, and Next and Prev pointers, 97090075Sobrien/// which link together all the uses of an SDNode. 97190075Sobrien/// 97290075Sobrienclass SDUse { 97390075Sobrien /// Val - The value being used. 97490075Sobrien SDValue Val; 97590075Sobrien /// User - The user of this value. 97690075Sobrien SDNode *User; 97790075Sobrien /// Prev, Next - Pointers to the uses list of the SDNode referred by 97890075Sobrien /// this operand. 97990075Sobrien SDUse **Prev, *Next; 98090075Sobrien 98190075Sobrien SDUse(const SDUse &U); // Do not implement 98290075Sobrien void operator=(const SDUse &U); // Do not implement 98390075Sobrien 98490075Sobrienpublic: 98590075Sobrien SDUse() : Val(), User(NULL), Prev(NULL), Next(NULL) {} 98690075Sobrien 98790075Sobrien /// Normally SDUse will just implicitly convert to an SDValue that it holds. 98890075Sobrien operator const SDValue&() const { return Val; } 98990075Sobrien 99090075Sobrien /// If implicit conversion to SDValue doesn't work, the get() method returns 99190075Sobrien /// the SDValue. 99290075Sobrien const SDValue &get() const { return Val; } 99390075Sobrien 99490075Sobrien /// getUser - This returns the SDNode that contains this Use. 99590075Sobrien SDNode *getUser() { return User; } 99690075Sobrien 99790075Sobrien /// getNext - Get the next SDUse in the use list. 99890075Sobrien SDUse *getNext() const { return Next; } 99990075Sobrien 100090075Sobrien /// getNode - Convenience function for get().getNode(). 100190075Sobrien SDNode *getNode() const { return Val.getNode(); } 100290075Sobrien /// getResNo - Convenience function for get().getResNo(). 100390075Sobrien unsigned getResNo() const { return Val.getResNo(); } 100490075Sobrien /// getValueType - Convenience function for get().getValueType(). 100590075Sobrien MVT getValueType() const { return Val.getValueType(); } 100690075Sobrien 100790075Sobrien /// operator== - Convenience function for get().operator== 100890075Sobrien bool operator==(const SDValue &V) const { 100990075Sobrien return Val == V; 101090075Sobrien } 101190075Sobrien 101290075Sobrien /// operator!= - Convenience function for get().operator!= 101390075Sobrien bool operator!=(const SDValue &V) const { 101490075Sobrien return Val != V; 101590075Sobrien } 101690075Sobrien 101790075Sobrien /// operator< - Convenience function for get().operator< 101890075Sobrien bool operator<(const SDValue &V) const { 101990075Sobrien return Val < V; 102090075Sobrien } 102190075Sobrien 102290075Sobrienprivate: 102390075Sobrien friend class SelectionDAG; 102490075Sobrien friend class SDNode; 102590075Sobrien 102690075Sobrien void setUser(SDNode *p) { User = p; } 102790075Sobrien 102890075Sobrien /// set - Remove this use from its existing use list, assign it the 102990075Sobrien /// given value, and add it to the new value's node's use list. 103090075Sobrien inline void set(const SDValue &V); 103190075Sobrien /// setInitial - like set, but only supports initializing a newly-allocated 103290075Sobrien /// SDUse with a non-null value. 103390075Sobrien inline void setInitial(const SDValue &V); 103490075Sobrien /// setNode - like set, but only sets the Node portion of the value, 103590075Sobrien /// leaving the ResNo portion unmodified. 103690075Sobrien inline void setNode(SDNode *N); 103790075Sobrien 103890075Sobrien void addToList(SDUse **List) { 103990075Sobrien Next = *List; 104090075Sobrien if (Next) Next->Prev = &Next; 104190075Sobrien Prev = List; 1042117395Skan *List = this; 104390075Sobrien } 104490075Sobrien 104590075Sobrien void removeFromList() { 104690075Sobrien *Prev = Next; 104790075Sobrien if (Next) Next->Prev = Prev; 104890075Sobrien } 104990075Sobrien}; 105090075Sobrien 105190075Sobrien/// simplify_type specializations - Allow casting operators to work directly on 105290075Sobrien/// SDValues as if they were SDNode*'s. 105390075Sobrientemplate<> struct simplify_type<SDUse> { 105490075Sobrien typedef SDNode* SimpleType; 105590075Sobrien static SimpleType getSimplifiedValue(const SDUse &Val) { 105690075Sobrien return static_cast<SimpleType>(Val.getNode()); 105790075Sobrien } 105890075Sobrien}; 105990075Sobrientemplate<> struct simplify_type<const SDUse> { 106090075Sobrien typedef SDNode* SimpleType; 106190075Sobrien static SimpleType getSimplifiedValue(const SDUse &Val) { 106290075Sobrien return static_cast<SimpleType>(Val.getNode()); 106390075Sobrien } 106490075Sobrien}; 106590075Sobrien 106690075Sobrien 106790075Sobrien/// SDNode - Represents one node in the SelectionDAG. 106890075Sobrien/// 106990075Sobrienclass SDNode : public FoldingSetNode, public ilist_node<SDNode> { 107090075Sobrienprivate: 107190075Sobrien /// NodeType - The operation that this node performs. 107290075Sobrien /// 107390075Sobrien short NodeType; 107490075Sobrien 107590075Sobrien /// OperandsNeedDelete - This is true if OperandList was new[]'d. If true, 107690075Sobrien /// then they will be delete[]'d when the node is destroyed. 107790075Sobrien unsigned short OperandsNeedDelete : 1; 107890075Sobrien 107990075Sobrienprotected: 108090075Sobrien /// SubclassData - This member is defined by this class, but is not used for 108190075Sobrien /// anything. Subclasses can use it to hold whatever state they find useful. 108290075Sobrien /// This field is initialized to zero by the ctor. 108390075Sobrien unsigned short SubclassData : 15; 108490075Sobrien 108590075Sobrienprivate: 108690075Sobrien /// NodeId - Unique id per SDNode in the DAG. 108790075Sobrien int NodeId; 108890075Sobrien 108990075Sobrien /// OperandList - The values that are used by this operation. 109090075Sobrien /// 109190075Sobrien SDUse *OperandList; 109290075Sobrien 109390075Sobrien /// ValueList - The types of the values this node defines. SDNode's may 109490075Sobrien /// define multiple values simultaneously. 109590075Sobrien const MVT *ValueList; 109690075Sobrien 109790075Sobrien /// UseList - List of uses for this SDNode. 109890075Sobrien SDUse *UseList; 109990075Sobrien 110090075Sobrien /// NumOperands/NumValues - The number of entries in the Operand/Value list. 110190075Sobrien unsigned short NumOperands, NumValues; 110290075Sobrien 110390075Sobrien /// debugLoc - source line information. 110490075Sobrien DebugLoc debugLoc; 110590075Sobrien 110690075Sobrien /// getValueTypeList - Return a pointer to the specified value type. 110790075Sobrien static const MVT *getValueTypeList(MVT VT); 110890075Sobrien 110990075Sobrien friend class SelectionDAG; 111090075Sobrien friend struct ilist_traits<SDNode>; 111190075Sobrien 111290075Sobrienpublic: 111390075Sobrien //===--------------------------------------------------------------------===// 111490075Sobrien // Accessors 111590075Sobrien // 111690075Sobrien 111790075Sobrien /// getOpcode - Return the SelectionDAG opcode value for this node. For 111890075Sobrien /// pre-isel nodes (those for which isMachineOpcode returns false), these 111990075Sobrien /// are the opcode values in the ISD and <target>ISD namespaces. For 112090075Sobrien /// post-isel opcodes, see getMachineOpcode. 112190075Sobrien unsigned getOpcode() const { return (unsigned short)NodeType; } 112290075Sobrien 112390075Sobrien /// isTargetOpcode - Test if this node has a target-specific opcode (in the 112490075Sobrien /// \<target\>ISD namespace). 112590075Sobrien bool isTargetOpcode() const { return NodeType >= ISD::BUILTIN_OP_END; } 112690075Sobrien 112790075Sobrien /// isMachineOpcode - Test if this node has a post-isel opcode, directly 112890075Sobrien /// corresponding to a MachineInstr opcode. 112990075Sobrien bool isMachineOpcode() const { return NodeType < 0; } 113090075Sobrien 113190075Sobrien /// getMachineOpcode - This may only be called if isMachineOpcode returns 113290075Sobrien /// true. It returns the MachineInstr opcode value that the node's opcode 113390075Sobrien /// corresponds to. 113490075Sobrien unsigned getMachineOpcode() const { 113590075Sobrien assert(isMachineOpcode() && "Not a MachineInstr opcode!"); 113690075Sobrien return ~NodeType; 1137103445Skan } 113890075Sobrien 113990075Sobrien /// use_empty - Return true if there are no uses of this node. 114090075Sobrien /// 114190075Sobrien bool use_empty() const { return UseList == NULL; } 114290075Sobrien 114390075Sobrien /// hasOneUse - Return true if there is exactly one use of this node. 114490075Sobrien /// 114590075Sobrien bool hasOneUse() const { 114690075Sobrien return !use_empty() && next(use_begin()) == use_end(); 114790075Sobrien } 114890075Sobrien 114990075Sobrien /// use_size - Return the number of uses of this node. This method takes 115090075Sobrien /// time proportional to the number of uses. 115190075Sobrien /// 115290075Sobrien size_t use_size() const { return std::distance(use_begin(), use_end()); } 115390075Sobrien 115490075Sobrien /// getNodeId - Return the unique node id. 115590075Sobrien /// 115690075Sobrien int getNodeId() const { return NodeId; } 115790075Sobrien 115890075Sobrien /// setNodeId - Set unique node id. 115990075Sobrien void setNodeId(int Id) { NodeId = Id; } 116090075Sobrien 116190075Sobrien /// getDebugLoc - Return the source location info. 116290075Sobrien const DebugLoc getDebugLoc() const { return debugLoc; } 116390075Sobrien 116490075Sobrien /// setDebugLoc - Set source location info. Try to avoid this, putting 116590075Sobrien /// it in the constructor is preferable. 116690075Sobrien void setDebugLoc(const DebugLoc dl) { debugLoc = dl; } 116790075Sobrien 116890075Sobrien /// use_iterator - This class provides iterator support for SDUse 116990075Sobrien /// operands that use a specific SDNode. 117090075Sobrien class use_iterator 117190075Sobrien : public forward_iterator<SDUse, ptrdiff_t> { 1172102780Skan SDUse *Op; 1173102780Skan explicit use_iterator(SDUse *op) : Op(op) { 1174102780Skan } 1175102780Skan friend class SDNode; 1176102780Skan public: 1177102780Skan typedef forward_iterator<SDUse, ptrdiff_t>::reference reference; 1178102780Skan typedef forward_iterator<SDUse, ptrdiff_t>::pointer pointer; 1179102780Skan 1180102780Skan use_iterator(const use_iterator &I) : Op(I.Op) {} 1181102780Skan use_iterator() : Op(0) {} 118290075Sobrien 118390075Sobrien bool operator==(const use_iterator &x) const { 118490075Sobrien return Op == x.Op; 118590075Sobrien } 118690075Sobrien bool operator!=(const use_iterator &x) const { 118790075Sobrien return !operator==(x); 118890075Sobrien } 118990075Sobrien 119090075Sobrien /// atEnd - return true if this iterator is at the end of uses list. 119190075Sobrien bool atEnd() const { return Op == 0; } 119290075Sobrien 119390075Sobrien // Iterator traversal: forward iteration only. 119490075Sobrien use_iterator &operator++() { // Preincrement 119590075Sobrien assert(Op && "Cannot increment end iterator!"); 119690075Sobrien Op = Op->getNext(); 119790075Sobrien return *this; 119890075Sobrien } 119990075Sobrien 120090075Sobrien use_iterator operator++(int) { // Postincrement 120190075Sobrien use_iterator tmp = *this; ++*this; return tmp; 120290075Sobrien } 120390075Sobrien 120490075Sobrien /// Retrieve a pointer to the current user node. 120590075Sobrien SDNode *operator*() const { 120690075Sobrien assert(Op && "Cannot dereference end iterator!"); 120790075Sobrien return Op->getUser(); 120890075Sobrien } 120990075Sobrien 121090075Sobrien SDNode *operator->() const { return operator*(); } 121190075Sobrien 121290075Sobrien SDUse &getUse() const { return *Op; } 121390075Sobrien 121490075Sobrien /// getOperandNo - Retrieve the operand # of this use in its user. 121590075Sobrien /// 121690075Sobrien unsigned getOperandNo() const { 121790075Sobrien assert(Op && "Cannot dereference end iterator!"); 121890075Sobrien return (unsigned)(Op - Op->getUser()->OperandList); 121990075Sobrien } 122090075Sobrien }; 122190075Sobrien 122290075Sobrien /// use_begin/use_end - Provide iteration support to walk over all uses 122390075Sobrien /// of an SDNode. 122490075Sobrien 122590075Sobrien use_iterator use_begin() const { 122690075Sobrien return use_iterator(UseList); 122790075Sobrien } 122890075Sobrien 122990075Sobrien static use_iterator use_end() { return use_iterator(0); } 123090075Sobrien 123190075Sobrien 123290075Sobrien /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the 123390075Sobrien /// indicated value. This method ignores uses of other values defined by this 123490075Sobrien /// operation. 123590075Sobrien bool hasNUsesOfValue(unsigned NUses, unsigned Value) const; 123690075Sobrien 123790075Sobrien /// hasAnyUseOfValue - Return true if there are any use of the indicated 123890075Sobrien /// value. This method ignores uses of other values defined by this operation. 123990075Sobrien bool hasAnyUseOfValue(unsigned Value) const; 124090075Sobrien 124190075Sobrien /// isOnlyUserOf - Return true if this node is the only use of N. 124290075Sobrien /// 124390075Sobrien bool isOnlyUserOf(SDNode *N) const; 124490075Sobrien 1245117395Skan /// isOperandOf - Return true if this node is an operand of N. 1246102780Skan /// 124790075Sobrien bool isOperandOf(SDNode *N) const; 124890075Sobrien 124990075Sobrien /// isPredecessorOf - Return true if this node is a predecessor of N. This 125090075Sobrien /// node is either an operand of N or it can be reached by recursively 125190075Sobrien /// traversing up the operands. 125290075Sobrien /// NOTE: this is an expensive method. Use it carefully. 125390075Sobrien bool isPredecessorOf(SDNode *N) const; 125490075Sobrien 125590075Sobrien /// getNumOperands - Return the number of values used by this operation. 125690075Sobrien /// 125790075Sobrien unsigned getNumOperands() const { return NumOperands; } 125890075Sobrien 125990075Sobrien /// getConstantOperandVal - Helper method returns the integer value of a 126090075Sobrien /// ConstantSDNode operand. 126190075Sobrien uint64_t getConstantOperandVal(unsigned Num) const; 126290075Sobrien 126390075Sobrien const SDValue &getOperand(unsigned Num) const { 126490075Sobrien assert(Num < NumOperands && "Invalid child # of SDNode!"); 126590075Sobrien return OperandList[Num]; 126690075Sobrien } 126790075Sobrien 126890075Sobrien typedef SDUse* op_iterator; 126990075Sobrien op_iterator op_begin() const { return OperandList; } 127090075Sobrien op_iterator op_end() const { return OperandList+NumOperands; } 127190075Sobrien 127290075Sobrien SDVTList getVTList() const { 127390075Sobrien SDVTList X = { ValueList, NumValues }; 127490075Sobrien return X; 127590075Sobrien }; 127690075Sobrien 127790075Sobrien /// getFlaggedNode - If this node has a flag operand, return the node 127890075Sobrien /// to which the flag operand points. Otherwise return NULL. 127990075Sobrien SDNode *getFlaggedNode() const { 128090075Sobrien if (getNumOperands() != 0 && 128190075Sobrien getOperand(getNumOperands()-1).getValueType() == MVT::Flag) 128290075Sobrien return getOperand(getNumOperands()-1).getNode(); 128390075Sobrien return 0; 128490075Sobrien } 128590075Sobrien 128690075Sobrien // If this is a pseudo op, like copyfromreg, look to see if there is a 128790075Sobrien // real target node flagged to it. If so, return the target node. 128890075Sobrien const SDNode *getFlaggedMachineNode() const { 128990075Sobrien const SDNode *FoundNode = this; 1290117395Skan 1291117395Skan // Climb up flag edges until a machine-opcode node is found, or the 1292117395Skan // end of the chain is reached. 1293117395Skan while (!FoundNode->isMachineOpcode()) { 1294117395Skan const SDNode *N = FoundNode->getFlaggedNode(); 1295117395Skan if (!N) break; 129690075Sobrien FoundNode = N; 129790075Sobrien } 129890075Sobrien 129990075Sobrien return FoundNode; 130090075Sobrien } 130190075Sobrien 130290075Sobrien /// getNumValues - Return the number of values defined/returned by this 130390075Sobrien /// operator. 130490075Sobrien /// 130590075Sobrien unsigned getNumValues() const { return NumValues; } 130690075Sobrien 130790075Sobrien /// getValueType - Return the type of a specified result. 130890075Sobrien /// 130990075Sobrien MVT getValueType(unsigned ResNo) const { 131090075Sobrien assert(ResNo < NumValues && "Illegal result number!"); 131190075Sobrien return ValueList[ResNo]; 131290075Sobrien } 131390075Sobrien 131490075Sobrien /// getValueSizeInBits - Returns MVT::getSizeInBits(getValueType(ResNo)). 131590075Sobrien /// 131690075Sobrien unsigned getValueSizeInBits(unsigned ResNo) const { 131790075Sobrien return getValueType(ResNo).getSizeInBits(); 131890075Sobrien } 131990075Sobrien 132090075Sobrien typedef const MVT* value_iterator; 132190075Sobrien value_iterator value_begin() const { return ValueList; } 132290075Sobrien value_iterator value_end() const { return ValueList+NumValues; } 132390075Sobrien 132490075Sobrien /// getOperationName - Return the opcode of this operation for printing. 132590075Sobrien /// 132690075Sobrien std::string getOperationName(const SelectionDAG *G = 0) const; 132790075Sobrien static const char* getIndexedModeName(ISD::MemIndexedMode AM); 132890075Sobrien void print_types(raw_ostream &OS, const SelectionDAG *G) const; 132990075Sobrien void print_details(raw_ostream &OS, const SelectionDAG *G) const; 133090075Sobrien void print(raw_ostream &OS, const SelectionDAG *G = 0) const; 133190075Sobrien void printr(raw_ostream &OS, const SelectionDAG *G = 0) const; 133290075Sobrien void dump() const; 133390075Sobrien void dumpr() const; 133490075Sobrien void dump(const SelectionDAG *G) const; 133590075Sobrien 133690075Sobrien static bool classof(const SDNode *) { return true; } 133790075Sobrien 133890075Sobrien /// Profile - Gather unique data for the node. 133990075Sobrien /// 1340117395Skan void Profile(FoldingSetNodeID &ID) const; 134190075Sobrien 134290075Sobrien /// addUse - This method should only be used by the SDUse class. 134390075Sobrien /// 134490075Sobrien void addUse(SDUse &U) { U.addToList(&UseList); } 134590075Sobrien 134690075Sobrienprotected: 134790075Sobrien static SDVTList getSDVTList(MVT VT) { 134890075Sobrien SDVTList Ret = { getValueTypeList(VT), 1 }; 134990075Sobrien return Ret; 135090075Sobrien } 135190075Sobrien 135290075Sobrien SDNode(unsigned Opc, const DebugLoc dl, SDVTList VTs, const SDValue *Ops, 135390075Sobrien unsigned NumOps) 135490075Sobrien : NodeType(Opc), OperandsNeedDelete(true), SubclassData(0), 135590075Sobrien NodeId(-1), 135690075Sobrien OperandList(NumOps ? new SDUse[NumOps] : 0), 135790075Sobrien ValueList(VTs.VTs), UseList(NULL), 135890075Sobrien NumOperands(NumOps), NumValues(VTs.NumVTs), 135990075Sobrien debugLoc(dl) { 136090075Sobrien for (unsigned i = 0; i != NumOps; ++i) { 136190075Sobrien OperandList[i].setUser(this); 136290075Sobrien OperandList[i].setInitial(Ops[i]); 136390075Sobrien } 136490075Sobrien } 1365102780Skan 1366102780Skan /// This constructor adds no operands itself; operands can be 1367102780Skan /// set later with InitOperands. 1368102780Skan SDNode(unsigned Opc, const DebugLoc dl, SDVTList VTs) 1369102780Skan : NodeType(Opc), OperandsNeedDelete(false), SubclassData(0), 1370102780Skan NodeId(-1), OperandList(0), ValueList(VTs.VTs), UseList(NULL), 1371102780Skan NumOperands(0), NumValues(VTs.NumVTs), 1372102780Skan debugLoc(dl) {} 1373102780Skan 1374102780Skan /// InitOperands - Initialize the operands list of this with 1 operand. 1375102780Skan void InitOperands(SDUse *Ops, const SDValue &Op0) { 1376102780Skan Ops[0].setUser(this); 1377102780Skan Ops[0].setInitial(Op0); 1378102780Skan NumOperands = 1; 1379102780Skan OperandList = Ops; 1380102780Skan } 1381102780Skan 1382102780Skan /// InitOperands - Initialize the operands list of this with 2 operands. 1383102780Skan void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1) { 1384102780Skan Ops[0].setUser(this); 1385102780Skan Ops[0].setInitial(Op0); 1386102780Skan Ops[1].setUser(this); 1387102780Skan Ops[1].setInitial(Op1); 1388102780Skan NumOperands = 2; 1389102780Skan OperandList = Ops; 1390102780Skan } 1391102780Skan 1392102780Skan /// InitOperands - Initialize the operands list of this with 3 operands. 1393102780Skan void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1, 1394102780Skan const SDValue &Op2) { 1395102780Skan Ops[0].setUser(this); 1396102780Skan Ops[0].setInitial(Op0); 1397102780Skan Ops[1].setUser(this); 1398102780Skan Ops[1].setInitial(Op1); 1399102780Skan Ops[2].setUser(this); 1400102780Skan Ops[2].setInitial(Op2); 1401102780Skan NumOperands = 3; 1402102780Skan OperandList = Ops; 1403102780Skan } 1404102780Skan 140590075Sobrien /// InitOperands - Initialize the operands list of this with 4 operands. 140690075Sobrien void InitOperands(SDUse *Ops, const SDValue &Op0, const SDValue &Op1, 140790075Sobrien const SDValue &Op2, const SDValue &Op3) { 140890075Sobrien Ops[0].setUser(this); 140990075Sobrien Ops[0].setInitial(Op0); 141090075Sobrien Ops[1].setUser(this); 141190075Sobrien Ops[1].setInitial(Op1); 141290075Sobrien Ops[2].setUser(this); 141390075Sobrien Ops[2].setInitial(Op2); 141490075Sobrien Ops[3].setUser(this); 141590075Sobrien Ops[3].setInitial(Op3); 141690075Sobrien NumOperands = 4; 141790075Sobrien OperandList = Ops; 141890075Sobrien } 141990075Sobrien 142090075Sobrien /// InitOperands - Initialize the operands list of this with N operands. 142190075Sobrien void InitOperands(SDUse *Ops, const SDValue *Vals, unsigned N) { 142290075Sobrien for (unsigned i = 0; i != N; ++i) { 142390075Sobrien Ops[i].setUser(this); 142490075Sobrien Ops[i].setInitial(Vals[i]); 142590075Sobrien } 142690075Sobrien NumOperands = N; 142790075Sobrien OperandList = Ops; 142890075Sobrien } 142990075Sobrien 143090075Sobrien /// DropOperands - Release the operands and set this node to have 143190075Sobrien /// zero operands. 143290075Sobrien void DropOperands(); 143390075Sobrien}; 143490075Sobrien 143590075Sobrien 143690075Sobrien// Define inline functions from the SDValue class. 143790075Sobrien 143890075Sobrieninline unsigned SDValue::getOpcode() const { 143990075Sobrien return Node->getOpcode(); 144090075Sobrien} 144190075Sobrieninline MVT SDValue::getValueType() const { 144290075Sobrien return Node->getValueType(ResNo); 144390075Sobrien} 144490075Sobrieninline unsigned SDValue::getNumOperands() const { 144590075Sobrien return Node->getNumOperands(); 144690075Sobrien} 144790075Sobrieninline const SDValue &SDValue::getOperand(unsigned i) const { 144890075Sobrien return Node->getOperand(i); 144990075Sobrien} 145090075Sobrieninline uint64_t SDValue::getConstantOperandVal(unsigned i) const { 145190075Sobrien return Node->getConstantOperandVal(i); 145290075Sobrien} 145390075Sobrieninline bool SDValue::isTargetOpcode() const { 145490075Sobrien return Node->isTargetOpcode(); 145590075Sobrien} 145690075Sobrieninline bool SDValue::isMachineOpcode() const { 145790075Sobrien return Node->isMachineOpcode(); 145890075Sobrien} 145990075Sobrieninline unsigned SDValue::getMachineOpcode() const { 146090075Sobrien return Node->getMachineOpcode(); 146190075Sobrien} 146290075Sobrieninline bool SDValue::use_empty() const { 146390075Sobrien return !Node->hasAnyUseOfValue(ResNo); 146490075Sobrien} 146590075Sobrieninline bool SDValue::hasOneUse() const { 146690075Sobrien return Node->hasNUsesOfValue(1, ResNo); 146790075Sobrien} 146890075Sobrieninline const DebugLoc SDValue::getDebugLoc() const { 146990075Sobrien return Node->getDebugLoc(); 147090075Sobrien} 147190075Sobrien 147290075Sobrien// Define inline functions from the SDUse class. 147390075Sobrien 147490075Sobrieninline void SDUse::set(const SDValue &V) { 147590075Sobrien if (Val.getNode()) removeFromList(); 147690075Sobrien Val = V; 147790075Sobrien if (V.getNode()) V.getNode()->addUse(*this); 147890075Sobrien} 147990075Sobrien 148090075Sobrieninline void SDUse::setInitial(const SDValue &V) { 148190075Sobrien Val = V; 148290075Sobrien V.getNode()->addUse(*this); 148390075Sobrien} 148490075Sobrien 148590075Sobrieninline void SDUse::setNode(SDNode *N) { 148690075Sobrien if (Val.getNode()) removeFromList(); 148790075Sobrien Val.setNode(N); 148890075Sobrien if (N) N->addUse(*this); 148990075Sobrien} 149090075Sobrien 149190075Sobrien/// UnarySDNode - This class is used for single-operand SDNodes. This is solely 149290075Sobrien/// to allow co-allocation of node operands with the node itself. 149390075Sobrienclass UnarySDNode : public SDNode { 149490075Sobrien SDUse Op; 149590075Sobrienpublic: 149690075Sobrien UnarySDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, SDValue X) 149790075Sobrien : SDNode(Opc, dl, VTs) { 1498102780Skan InitOperands(&Op, X); 149990075Sobrien } 150090075Sobrien}; 150190075Sobrien 150290075Sobrien/// BinarySDNode - This class is used for two-operand SDNodes. This is solely 150390075Sobrien/// to allow co-allocation of node operands with the node itself. 150490075Sobrienclass BinarySDNode : public SDNode { 150590075Sobrien SDUse Ops[2]; 150690075Sobrienpublic: 150790075Sobrien BinarySDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, SDValue X, SDValue Y) 150890075Sobrien : SDNode(Opc, dl, VTs) { 150990075Sobrien InitOperands(Ops, X, Y); 151090075Sobrien } 151190075Sobrien}; 151290075Sobrien 151390075Sobrien/// TernarySDNode - This class is used for three-operand SDNodes. This is solely 151490075Sobrien/// to allow co-allocation of node operands with the node itself. 151590075Sobrienclass TernarySDNode : public SDNode { 151690075Sobrien SDUse Ops[3]; 151790075Sobrienpublic: 151890075Sobrien TernarySDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, SDValue X, SDValue Y, 151990075Sobrien SDValue Z) 152090075Sobrien : SDNode(Opc, dl, VTs) { 1521117395Skan InitOperands(Ops, X, Y, Z); 1522117395Skan } 1523117395Skan}; 1524117395Skan 1525117395Skan 1526117395Skan/// HandleSDNode - This class is used to form a handle around another node that 152790075Sobrien/// is persistant and is updated across invocations of replaceAllUsesWith on its 152890075Sobrien/// operand. This node should be directly created by end-users and not added to 152990075Sobrien/// the AllNodes list. 153090075Sobrienclass HandleSDNode : public SDNode { 153190075Sobrien SDUse Op; 153290075Sobrienpublic: 153390075Sobrien // FIXME: Remove the "noinline" attribute once <rdar://problem/5852746> is 153490075Sobrien // fixed. 153590075Sobrien#ifdef __GNUC__ 153690075Sobrien explicit __attribute__((__noinline__)) HandleSDNode(SDValue X) 153790075Sobrien#else 153890075Sobrien explicit HandleSDNode(SDValue X) 153990075Sobrien#endif 154090075Sobrien : SDNode(ISD::HANDLENODE, DebugLoc::getUnknownLoc(), 154190075Sobrien getSDVTList(MVT::Other)) { 154290075Sobrien InitOperands(&Op, X); 154390075Sobrien } 154490075Sobrien ~HandleSDNode(); 154590075Sobrien const SDValue &getValue() const { return Op; } 154690075Sobrien}; 154790075Sobrien 154890075Sobrien/// Abstact virtual class for operations for memory operations 154990075Sobrienclass MemSDNode : public SDNode { 155090075Sobrienprivate: 155190075Sobrien // MemoryVT - VT of in-memory value. 155290075Sobrien MVT MemoryVT; 155390075Sobrien 155490075Sobrien //! SrcValue - Memory location for alias analysis. 155590075Sobrien const Value *SrcValue; 155690075Sobrien 155790075Sobrien //! SVOffset - Memory location offset. Note that base is defined in MemSDNode 155890075Sobrien int SVOffset; 155990075Sobrien 156090075Sobrienpublic: 156190075Sobrien MemSDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, MVT MemoryVT, 156290075Sobrien const Value *srcValue, int SVOff, 156390075Sobrien unsigned alignment, bool isvolatile); 156490075Sobrien 156590075Sobrien MemSDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, const SDValue *Ops, 156690075Sobrien unsigned NumOps, MVT MemoryVT, const Value *srcValue, int SVOff, 156790075Sobrien unsigned alignment, bool isvolatile); 156890075Sobrien 156990075Sobrien /// Returns alignment and volatility of the memory access 157090075Sobrien unsigned getAlignment() const { return (1u << (SubclassData >> 6)) >> 1; } 157190075Sobrien bool isVolatile() const { return (SubclassData >> 5) & 1; } 157290075Sobrien 157390075Sobrien /// getRawSubclassData - Return the SubclassData value, which contains an 157490075Sobrien /// encoding of the alignment and volatile information, as well as bits 157590075Sobrien /// used by subclasses. This function should only be used to compute a 157690075Sobrien /// FoldingSetNodeID value. 157790075Sobrien unsigned getRawSubclassData() const { 157890075Sobrien return SubclassData; 157990075Sobrien } 158090075Sobrien 158190075Sobrien /// Returns the SrcValue and offset that describes the location of the access 158290075Sobrien const Value *getSrcValue() const { return SrcValue; } 158390075Sobrien int getSrcValueOffset() const { return SVOffset; } 158490075Sobrien 158590075Sobrien /// getMemoryVT - Return the type of the in-memory value. 158690075Sobrien MVT getMemoryVT() const { return MemoryVT; } 158790075Sobrien 158890075Sobrien /// getMemOperand - Return a MachineMemOperand object describing the memory 158990075Sobrien /// reference performed by operation. 159090075Sobrien MachineMemOperand getMemOperand() const; 159190075Sobrien 159290075Sobrien const SDValue &getChain() const { return getOperand(0); } 159390075Sobrien const SDValue &getBasePtr() const { 159490075Sobrien return getOperand(getOpcode() == ISD::STORE ? 2 : 1); 159590075Sobrien } 159690075Sobrien 159790075Sobrien // Methods to support isa and dyn_cast 159890075Sobrien static bool classof(const MemSDNode *) { return true; } 159990075Sobrien static bool classof(const SDNode *N) { 160090075Sobrien // For some targets, we lower some target intrinsics to a MemIntrinsicNode 160190075Sobrien // with either an intrinsic or a target opcode. 160290075Sobrien return N->getOpcode() == ISD::LOAD || 1603 N->getOpcode() == ISD::STORE || 1604 N->getOpcode() == ISD::ATOMIC_CMP_SWAP || 1605 N->getOpcode() == ISD::ATOMIC_SWAP || 1606 N->getOpcode() == ISD::ATOMIC_LOAD_ADD || 1607 N->getOpcode() == ISD::ATOMIC_LOAD_SUB || 1608 N->getOpcode() == ISD::ATOMIC_LOAD_AND || 1609 N->getOpcode() == ISD::ATOMIC_LOAD_OR || 1610 N->getOpcode() == ISD::ATOMIC_LOAD_XOR || 1611 N->getOpcode() == ISD::ATOMIC_LOAD_NAND || 1612 N->getOpcode() == ISD::ATOMIC_LOAD_MIN || 1613 N->getOpcode() == ISD::ATOMIC_LOAD_MAX || 1614 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN || 1615 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX || 1616 N->getOpcode() == ISD::INTRINSIC_W_CHAIN || 1617 N->getOpcode() == ISD::INTRINSIC_VOID || 1618 N->isTargetOpcode(); 1619 } 1620}; 1621 1622/// AtomicSDNode - A SDNode reprenting atomic operations. 1623/// 1624class AtomicSDNode : public MemSDNode { 1625 SDUse Ops[4]; 1626 1627public: 1628 // Opc: opcode for atomic 1629 // VTL: value type list 1630 // Chain: memory chain for operaand 1631 // Ptr: address to update as a SDValue 1632 // Cmp: compare value 1633 // Swp: swap value 1634 // SrcVal: address to update as a Value (used for MemOperand) 1635 // Align: alignment of memory 1636 AtomicSDNode(unsigned Opc, DebugLoc dl, SDVTList VTL, MVT MemVT, 1637 SDValue Chain, SDValue Ptr, 1638 SDValue Cmp, SDValue Swp, const Value* SrcVal, 1639 unsigned Align=0) 1640 : MemSDNode(Opc, dl, VTL, MemVT, SrcVal, /*SVOffset=*/0, 1641 Align, /*isVolatile=*/true) { 1642 InitOperands(Ops, Chain, Ptr, Cmp, Swp); 1643 } 1644 AtomicSDNode(unsigned Opc, DebugLoc dl, SDVTList VTL, MVT MemVT, 1645 SDValue Chain, SDValue Ptr, 1646 SDValue Val, const Value* SrcVal, unsigned Align=0) 1647 : MemSDNode(Opc, dl, VTL, MemVT, SrcVal, /*SVOffset=*/0, 1648 Align, /*isVolatile=*/true) { 1649 InitOperands(Ops, Chain, Ptr, Val); 1650 } 1651 1652 const SDValue &getBasePtr() const { return getOperand(1); } 1653 const SDValue &getVal() const { return getOperand(2); } 1654 1655 bool isCompareAndSwap() const { 1656 unsigned Op = getOpcode(); 1657 return Op == ISD::ATOMIC_CMP_SWAP; 1658 } 1659 1660 // Methods to support isa and dyn_cast 1661 static bool classof(const AtomicSDNode *) { return true; } 1662 static bool classof(const SDNode *N) { 1663 return N->getOpcode() == ISD::ATOMIC_CMP_SWAP || 1664 N->getOpcode() == ISD::ATOMIC_SWAP || 1665 N->getOpcode() == ISD::ATOMIC_LOAD_ADD || 1666 N->getOpcode() == ISD::ATOMIC_LOAD_SUB || 1667 N->getOpcode() == ISD::ATOMIC_LOAD_AND || 1668 N->getOpcode() == ISD::ATOMIC_LOAD_OR || 1669 N->getOpcode() == ISD::ATOMIC_LOAD_XOR || 1670 N->getOpcode() == ISD::ATOMIC_LOAD_NAND || 1671 N->getOpcode() == ISD::ATOMIC_LOAD_MIN || 1672 N->getOpcode() == ISD::ATOMIC_LOAD_MAX || 1673 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN || 1674 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX; 1675 } 1676}; 1677 1678/// MemIntrinsicSDNode - This SDNode is used for target intrinsic that touches 1679/// memory and need an associated memory operand. 1680/// 1681class MemIntrinsicSDNode : public MemSDNode { 1682 bool ReadMem; // Intrinsic reads memory 1683 bool WriteMem; // Intrinsic writes memory 1684public: 1685 MemIntrinsicSDNode(unsigned Opc, DebugLoc dl, SDVTList VTs, 1686 const SDValue *Ops, unsigned NumOps, 1687 MVT MemoryVT, const Value *srcValue, int SVO, 1688 unsigned Align, bool Vol, bool ReadMem, bool WriteMem) 1689 : MemSDNode(Opc, dl, VTs, Ops, NumOps, MemoryVT, srcValue, SVO, Align, Vol), 1690 ReadMem(ReadMem), WriteMem(WriteMem) { 1691 } 1692 1693 bool readMem() const { return ReadMem; } 1694 bool writeMem() const { return WriteMem; } 1695 1696 // Methods to support isa and dyn_cast 1697 static bool classof(const MemIntrinsicSDNode *) { return true; } 1698 static bool classof(const SDNode *N) { 1699 // We lower some target intrinsics to their target opcode 1700 // early a node with a target opcode can be of this class 1701 return N->getOpcode() == ISD::INTRINSIC_W_CHAIN || 1702 N->getOpcode() == ISD::INTRINSIC_VOID || 1703 N->isTargetOpcode(); 1704 } 1705}; 1706 1707/// ShuffleVectorSDNode - This SDNode is used to implement the code generator 1708/// support for the llvm IR shufflevector instruction. It combines elements 1709/// from two input vectors into a new input vector, with the selection and 1710/// ordering of elements determined by an array of integers, referred to as 1711/// the shuffle mask. For input vectors of width N, mask indices of 0..N-1 1712/// refer to elements from the LHS input, and indices from N to 2N-1 the RHS. 1713/// An index of -1 is treated as undef, such that the code generator may put 1714/// any value in the corresponding element of the result. 1715class ShuffleVectorSDNode : public SDNode { 1716 SDUse Ops[2]; 1717 1718 // The memory for Mask is owned by the SelectionDAG's OperandAllocator, and 1719 // is freed when the SelectionDAG object is destroyed. 1720 const int *Mask; 1721protected: 1722 friend class SelectionDAG; 1723 ShuffleVectorSDNode(MVT VT, DebugLoc dl, SDValue N1, SDValue N2, 1724 const int *M) 1725 : SDNode(ISD::VECTOR_SHUFFLE, dl, getSDVTList(VT)), Mask(M) { 1726 InitOperands(Ops, N1, N2); 1727 } 1728public: 1729 1730 void getMask(SmallVectorImpl<int> &M) const { 1731 MVT VT = getValueType(0); 1732 M.clear(); 1733 for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) 1734 M.push_back(Mask[i]); 1735 } 1736 int getMaskElt(unsigned Idx) const { 1737 assert(Idx < getValueType(0).getVectorNumElements() && "Idx out of range!"); 1738 return Mask[Idx]; 1739 } 1740 1741 bool isSplat() const { return isSplatMask(Mask, getValueType(0)); } 1742 int getSplatIndex() const { 1743 assert(isSplat() && "Cannot get splat index for non-splat!"); 1744 return Mask[0]; 1745 } 1746 static bool isSplatMask(const int *Mask, MVT VT); 1747 1748 static bool classof(const ShuffleVectorSDNode *) { return true; } 1749 static bool classof(const SDNode *N) { 1750 return N->getOpcode() == ISD::VECTOR_SHUFFLE; 1751 } 1752}; 1753 1754class ConstantSDNode : public SDNode { 1755 const ConstantInt *Value; 1756 friend class SelectionDAG; 1757 ConstantSDNode(bool isTarget, const ConstantInt *val, MVT VT) 1758 : SDNode(isTarget ? ISD::TargetConstant : ISD::Constant, 1759 DebugLoc::getUnknownLoc(), getSDVTList(VT)), Value(val) { 1760 } 1761public: 1762 1763 const ConstantInt *getConstantIntValue() const { return Value; } 1764 const APInt &getAPIntValue() const { return Value->getValue(); } 1765 uint64_t getZExtValue() const { return Value->getZExtValue(); } 1766 int64_t getSExtValue() const { return Value->getSExtValue(); } 1767 1768 bool isNullValue() const { return Value->isNullValue(); } 1769 bool isAllOnesValue() const { return Value->isAllOnesValue(); } 1770 1771 static bool classof(const ConstantSDNode *) { return true; } 1772 static bool classof(const SDNode *N) { 1773 return N->getOpcode() == ISD::Constant || 1774 N->getOpcode() == ISD::TargetConstant; 1775 } 1776}; 1777 1778class ConstantFPSDNode : public SDNode { 1779 const ConstantFP *Value; 1780 friend class SelectionDAG; 1781 ConstantFPSDNode(bool isTarget, const ConstantFP *val, MVT VT) 1782 : SDNode(isTarget ? ISD::TargetConstantFP : ISD::ConstantFP, 1783 DebugLoc::getUnknownLoc(), getSDVTList(VT)), Value(val) { 1784 } 1785public: 1786 1787 const APFloat& getValueAPF() const { return Value->getValueAPF(); } 1788 const ConstantFP *getConstantFPValue() const { return Value; } 1789 1790 /// isExactlyValue - We don't rely on operator== working on double values, as 1791 /// it returns true for things that are clearly not equal, like -0.0 and 0.0. 1792 /// As such, this method can be used to do an exact bit-for-bit comparison of 1793 /// two floating point values. 1794 1795 /// We leave the version with the double argument here because it's just so 1796 /// convenient to write "2.0" and the like. Without this function we'd 1797 /// have to duplicate its logic everywhere it's called. 1798 bool isExactlyValue(double V) const { 1799 bool ignored; 1800 // convert is not supported on this type 1801 if (&Value->getValueAPF().getSemantics() == &APFloat::PPCDoubleDouble) 1802 return false; 1803 APFloat Tmp(V); 1804 Tmp.convert(Value->getValueAPF().getSemantics(), 1805 APFloat::rmNearestTiesToEven, &ignored); 1806 return isExactlyValue(Tmp); 1807 } 1808 bool isExactlyValue(const APFloat& V) const; 1809 1810 bool isValueValidForType(MVT VT, const APFloat& Val); 1811 1812 static bool classof(const ConstantFPSDNode *) { return true; } 1813 static bool classof(const SDNode *N) { 1814 return N->getOpcode() == ISD::ConstantFP || 1815 N->getOpcode() == ISD::TargetConstantFP; 1816 } 1817}; 1818 1819class GlobalAddressSDNode : public SDNode { 1820 GlobalValue *TheGlobal; 1821 int64_t Offset; 1822 unsigned char TargetFlags; 1823 friend class SelectionDAG; 1824 GlobalAddressSDNode(unsigned Opc, const GlobalValue *GA, MVT VT, 1825 int64_t o, unsigned char TargetFlags); 1826public: 1827 1828 GlobalValue *getGlobal() const { return TheGlobal; } 1829 int64_t getOffset() const { return Offset; } 1830 unsigned char getTargetFlags() const { return TargetFlags; } 1831 // Return the address space this GlobalAddress belongs to. 1832 unsigned getAddressSpace() const; 1833 1834 static bool classof(const GlobalAddressSDNode *) { return true; } 1835 static bool classof(const SDNode *N) { 1836 return N->getOpcode() == ISD::GlobalAddress || 1837 N->getOpcode() == ISD::TargetGlobalAddress || 1838 N->getOpcode() == ISD::GlobalTLSAddress || 1839 N->getOpcode() == ISD::TargetGlobalTLSAddress; 1840 } 1841}; 1842 1843class FrameIndexSDNode : public SDNode { 1844 int FI; 1845 friend class SelectionDAG; 1846 FrameIndexSDNode(int fi, MVT VT, bool isTarg) 1847 : SDNode(isTarg ? ISD::TargetFrameIndex : ISD::FrameIndex, 1848 DebugLoc::getUnknownLoc(), getSDVTList(VT)), FI(fi) { 1849 } 1850public: 1851 1852 int getIndex() const { return FI; } 1853 1854 static bool classof(const FrameIndexSDNode *) { return true; } 1855 static bool classof(const SDNode *N) { 1856 return N->getOpcode() == ISD::FrameIndex || 1857 N->getOpcode() == ISD::TargetFrameIndex; 1858 } 1859}; 1860 1861class JumpTableSDNode : public SDNode { 1862 int JTI; 1863 unsigned char TargetFlags; 1864 friend class SelectionDAG; 1865 JumpTableSDNode(int jti, MVT VT, bool isTarg, unsigned char TF) 1866 : SDNode(isTarg ? ISD::TargetJumpTable : ISD::JumpTable, 1867 DebugLoc::getUnknownLoc(), getSDVTList(VT)), JTI(jti), TargetFlags(TF) { 1868 } 1869public: 1870 1871 int getIndex() const { return JTI; } 1872 unsigned char getTargetFlags() const { return TargetFlags; } 1873 1874 static bool classof(const JumpTableSDNode *) { return true; } 1875 static bool classof(const SDNode *N) { 1876 return N->getOpcode() == ISD::JumpTable || 1877 N->getOpcode() == ISD::TargetJumpTable; 1878 } 1879}; 1880 1881class ConstantPoolSDNode : public SDNode { 1882 union { 1883 Constant *ConstVal; 1884 MachineConstantPoolValue *MachineCPVal; 1885 } Val; 1886 int Offset; // It's a MachineConstantPoolValue if top bit is set. 1887 unsigned Alignment; // Minimum alignment requirement of CP (not log2 value). 1888 unsigned char TargetFlags; 1889 friend class SelectionDAG; 1890 ConstantPoolSDNode(bool isTarget, Constant *c, MVT VT, int o, unsigned Align, 1891 unsigned char TF) 1892 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool, 1893 DebugLoc::getUnknownLoc(), 1894 getSDVTList(VT)), Offset(o), Alignment(Align), TargetFlags(TF) { 1895 assert((int)Offset >= 0 && "Offset is too large"); 1896 Val.ConstVal = c; 1897 } 1898 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v, 1899 MVT VT, int o, unsigned Align, unsigned char TF) 1900 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool, 1901 DebugLoc::getUnknownLoc(), 1902 getSDVTList(VT)), Offset(o), Alignment(Align), TargetFlags(TF) { 1903 assert((int)Offset >= 0 && "Offset is too large"); 1904 Val.MachineCPVal = v; 1905 Offset |= 1 << (sizeof(unsigned)*CHAR_BIT-1); 1906 } 1907public: 1908 1909 1910 bool isMachineConstantPoolEntry() const { 1911 return (int)Offset < 0; 1912 } 1913 1914 Constant *getConstVal() const { 1915 assert(!isMachineConstantPoolEntry() && "Wrong constantpool type"); 1916 return Val.ConstVal; 1917 } 1918 1919 MachineConstantPoolValue *getMachineCPVal() const { 1920 assert(isMachineConstantPoolEntry() && "Wrong constantpool type"); 1921 return Val.MachineCPVal; 1922 } 1923 1924 int getOffset() const { 1925 return Offset & ~(1 << (sizeof(unsigned)*CHAR_BIT-1)); 1926 } 1927 1928 // Return the alignment of this constant pool object, which is either 0 (for 1929 // default alignment) or the desired value. 1930 unsigned getAlignment() const { return Alignment; } 1931 unsigned char getTargetFlags() const { return TargetFlags; } 1932 1933 const Type *getType() const; 1934 1935 static bool classof(const ConstantPoolSDNode *) { return true; } 1936 static bool classof(const SDNode *N) { 1937 return N->getOpcode() == ISD::ConstantPool || 1938 N->getOpcode() == ISD::TargetConstantPool; 1939 } 1940}; 1941 1942class BasicBlockSDNode : public SDNode { 1943 MachineBasicBlock *MBB; 1944 friend class SelectionDAG; 1945 /// Debug info is meaningful and potentially useful here, but we create 1946 /// blocks out of order when they're jumped to, which makes it a bit 1947 /// harder. Let's see if we need it first. 1948 explicit BasicBlockSDNode(MachineBasicBlock *mbb) 1949 : SDNode(ISD::BasicBlock, DebugLoc::getUnknownLoc(), 1950 getSDVTList(MVT::Other)), MBB(mbb) { 1951 } 1952public: 1953 1954 MachineBasicBlock *getBasicBlock() const { return MBB; } 1955 1956 static bool classof(const BasicBlockSDNode *) { return true; } 1957 static bool classof(const SDNode *N) { 1958 return N->getOpcode() == ISD::BasicBlock; 1959 } 1960}; 1961 1962/// BuildVectorSDNode - A "pseudo-class" with methods for operating on 1963/// BUILD_VECTORs. 1964class BuildVectorSDNode : public SDNode { 1965 // These are constructed as SDNodes and then cast to BuildVectorSDNodes. 1966 explicit BuildVectorSDNode(); // Do not implement 1967public: 1968 /// isConstantSplat - Check if this is a constant splat, and if so, find the 1969 /// smallest element size that splats the vector. If MinSplatBits is 1970 /// nonzero, the element size must be at least that large. Note that the 1971 /// splat element may be the entire vector (i.e., a one element vector). 1972 /// Returns the splat element value in SplatValue. Any undefined bits in 1973 /// that value are zero, and the corresponding bits in the SplatUndef mask 1974 /// are set. The SplatBitSize value is set to the splat element size in 1975 /// bits. HasAnyUndefs is set to true if any bits in the vector are 1976 /// undefined. 1977 bool isConstantSplat(APInt &SplatValue, APInt &SplatUndef, 1978 unsigned &SplatBitSize, bool &HasAnyUndefs, 1979 unsigned MinSplatBits = 0); 1980 1981 static inline bool classof(const BuildVectorSDNode *) { return true; } 1982 static inline bool classof(const SDNode *N) { 1983 return N->getOpcode() == ISD::BUILD_VECTOR; 1984 } 1985}; 1986 1987/// SrcValueSDNode - An SDNode that holds an arbitrary LLVM IR Value. This is 1988/// used when the SelectionDAG needs to make a simple reference to something 1989/// in the LLVM IR representation. 1990/// 1991/// Note that this is not used for carrying alias information; that is done 1992/// with MemOperandSDNode, which includes a Value which is required to be a 1993/// pointer, and several other fields specific to memory references. 1994/// 1995class SrcValueSDNode : public SDNode { 1996 const Value *V; 1997 friend class SelectionDAG; 1998 /// Create a SrcValue for a general value. 1999 explicit SrcValueSDNode(const Value *v) 2000 : SDNode(ISD::SRCVALUE, DebugLoc::getUnknownLoc(), 2001 getSDVTList(MVT::Other)), V(v) {} 2002 2003public: 2004 /// getValue - return the contained Value. 2005 const Value *getValue() const { return V; } 2006 2007 static bool classof(const SrcValueSDNode *) { return true; } 2008 static bool classof(const SDNode *N) { 2009 return N->getOpcode() == ISD::SRCVALUE; 2010 } 2011}; 2012 2013 2014/// MemOperandSDNode - An SDNode that holds a MachineMemOperand. This is 2015/// used to represent a reference to memory after ISD::LOAD 2016/// and ISD::STORE have been lowered. 2017/// 2018class MemOperandSDNode : public SDNode { 2019 friend class SelectionDAG; 2020 /// Create a MachineMemOperand node 2021 explicit MemOperandSDNode(const MachineMemOperand &mo) 2022 : SDNode(ISD::MEMOPERAND, DebugLoc::getUnknownLoc(), 2023 getSDVTList(MVT::Other)), MO(mo) {} 2024 2025public: 2026 /// MO - The contained MachineMemOperand. 2027 const MachineMemOperand MO; 2028 2029 static bool classof(const MemOperandSDNode *) { return true; } 2030 static bool classof(const SDNode *N) { 2031 return N->getOpcode() == ISD::MEMOPERAND; 2032 } 2033}; 2034 2035 2036class RegisterSDNode : public SDNode { 2037 unsigned Reg; 2038 friend class SelectionDAG; 2039 RegisterSDNode(unsigned reg, MVT VT) 2040 : SDNode(ISD::Register, DebugLoc::getUnknownLoc(), 2041 getSDVTList(VT)), Reg(reg) { 2042 } 2043public: 2044 2045 unsigned getReg() const { return Reg; } 2046 2047 static bool classof(const RegisterSDNode *) { return true; } 2048 static bool classof(const SDNode *N) { 2049 return N->getOpcode() == ISD::Register; 2050 } 2051}; 2052 2053class DbgStopPointSDNode : public SDNode { 2054 SDUse Chain; 2055 unsigned Line; 2056 unsigned Column; 2057 Value *CU; 2058 friend class SelectionDAG; 2059 DbgStopPointSDNode(SDValue ch, unsigned l, unsigned c, 2060 Value *cu) 2061 : SDNode(ISD::DBG_STOPPOINT, DebugLoc::getUnknownLoc(), 2062 getSDVTList(MVT::Other)), Line(l), Column(c), CU(cu) { 2063 InitOperands(&Chain, ch); 2064 } 2065public: 2066 unsigned getLine() const { return Line; } 2067 unsigned getColumn() const { return Column; } 2068 Value *getCompileUnit() const { return CU; } 2069 2070 static bool classof(const DbgStopPointSDNode *) { return true; } 2071 static bool classof(const SDNode *N) { 2072 return N->getOpcode() == ISD::DBG_STOPPOINT; 2073 } 2074}; 2075 2076class LabelSDNode : public SDNode { 2077 SDUse Chain; 2078 unsigned LabelID; 2079 friend class SelectionDAG; 2080LabelSDNode(unsigned NodeTy, DebugLoc dl, SDValue ch, unsigned id) 2081 : SDNode(NodeTy, dl, getSDVTList(MVT::Other)), LabelID(id) { 2082 InitOperands(&Chain, ch); 2083 } 2084public: 2085 unsigned getLabelID() const { return LabelID; } 2086 2087 static bool classof(const LabelSDNode *) { return true; } 2088 static bool classof(const SDNode *N) { 2089 return N->getOpcode() == ISD::DBG_LABEL || 2090 N->getOpcode() == ISD::EH_LABEL; 2091 } 2092}; 2093 2094class ExternalSymbolSDNode : public SDNode { 2095 const char *Symbol; 2096 unsigned char TargetFlags; 2097 2098 friend class SelectionDAG; 2099 ExternalSymbolSDNode(bool isTarget, const char *Sym, unsigned char TF, MVT VT) 2100 : SDNode(isTarget ? ISD::TargetExternalSymbol : ISD::ExternalSymbol, 2101 DebugLoc::getUnknownLoc(), 2102 getSDVTList(VT)), Symbol(Sym), TargetFlags(TF) { 2103 } 2104public: 2105 2106 const char *getSymbol() const { return Symbol; } 2107 unsigned char getTargetFlags() const { return TargetFlags; } 2108 2109 static bool classof(const ExternalSymbolSDNode *) { return true; } 2110 static bool classof(const SDNode *N) { 2111 return N->getOpcode() == ISD::ExternalSymbol || 2112 N->getOpcode() == ISD::TargetExternalSymbol; 2113 } 2114}; 2115 2116class CondCodeSDNode : public SDNode { 2117 ISD::CondCode Condition; 2118 friend class SelectionDAG; 2119 explicit CondCodeSDNode(ISD::CondCode Cond) 2120 : SDNode(ISD::CONDCODE, DebugLoc::getUnknownLoc(), 2121 getSDVTList(MVT::Other)), Condition(Cond) { 2122 } 2123public: 2124 2125 ISD::CondCode get() const { return Condition; } 2126 2127 static bool classof(const CondCodeSDNode *) { return true; } 2128 static bool classof(const SDNode *N) { 2129 return N->getOpcode() == ISD::CONDCODE; 2130 } 2131}; 2132 2133/// CvtRndSatSDNode - NOTE: avoid using this node as this may disappear in the 2134/// future and most targets don't support it. 2135class CvtRndSatSDNode : public SDNode { 2136 ISD::CvtCode CvtCode; 2137 friend class SelectionDAG; 2138 explicit CvtRndSatSDNode(MVT VT, DebugLoc dl, const SDValue *Ops, 2139 unsigned NumOps, ISD::CvtCode Code) 2140 : SDNode(ISD::CONVERT_RNDSAT, dl, getSDVTList(VT), Ops, NumOps), 2141 CvtCode(Code) { 2142 assert(NumOps == 5 && "wrong number of operations"); 2143 } 2144public: 2145 ISD::CvtCode getCvtCode() const { return CvtCode; } 2146 2147 static bool classof(const CvtRndSatSDNode *) { return true; } 2148 static bool classof(const SDNode *N) { 2149 return N->getOpcode() == ISD::CONVERT_RNDSAT; 2150 } 2151}; 2152 2153namespace ISD { 2154 struct ArgFlagsTy { 2155 private: 2156 static const uint64_t NoFlagSet = 0ULL; 2157 static const uint64_t ZExt = 1ULL<<0; ///< Zero extended 2158 static const uint64_t ZExtOffs = 0; 2159 static const uint64_t SExt = 1ULL<<1; ///< Sign extended 2160 static const uint64_t SExtOffs = 1; 2161 static const uint64_t InReg = 1ULL<<2; ///< Passed in register 2162 static const uint64_t InRegOffs = 2; 2163 static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr 2164 static const uint64_t SRetOffs = 3; 2165 static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value 2166 static const uint64_t ByValOffs = 4; 2167 static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain 2168 static const uint64_t NestOffs = 5; 2169 static const uint64_t ByValAlign = 0xFULL << 6; //< Struct alignment 2170 static const uint64_t ByValAlignOffs = 6; 2171 static const uint64_t Split = 1ULL << 10; 2172 static const uint64_t SplitOffs = 10; 2173 static const uint64_t OrigAlign = 0x1FULL<<27; 2174 static const uint64_t OrigAlignOffs = 27; 2175 static const uint64_t ByValSize = 0xffffffffULL << 32; //< Struct size 2176 static const uint64_t ByValSizeOffs = 32; 2177 2178 static const uint64_t One = 1ULL; //< 1 of this type, for shifts 2179 2180 uint64_t Flags; 2181 public: 2182 ArgFlagsTy() : Flags(0) { } 2183 2184 bool isZExt() const { return Flags & ZExt; } 2185 void setZExt() { Flags |= One << ZExtOffs; } 2186 2187 bool isSExt() const { return Flags & SExt; } 2188 void setSExt() { Flags |= One << SExtOffs; } 2189 2190 bool isInReg() const { return Flags & InReg; } 2191 void setInReg() { Flags |= One << InRegOffs; } 2192 2193 bool isSRet() const { return Flags & SRet; } 2194 void setSRet() { Flags |= One << SRetOffs; } 2195 2196 bool isByVal() const { return Flags & ByVal; } 2197 void setByVal() { Flags |= One << ByValOffs; } 2198 2199 bool isNest() const { return Flags & Nest; } 2200 void setNest() { Flags |= One << NestOffs; } 2201 2202 unsigned getByValAlign() const { 2203 return (unsigned) 2204 ((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2); 2205 } 2206 void setByValAlign(unsigned A) { 2207 Flags = (Flags & ~ByValAlign) | 2208 (uint64_t(Log2_32(A) + 1) << ByValAlignOffs); 2209 } 2210 2211 bool isSplit() const { return Flags & Split; } 2212 void setSplit() { Flags |= One << SplitOffs; } 2213 2214 unsigned getOrigAlign() const { 2215 return (unsigned) 2216 ((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2); 2217 } 2218 void setOrigAlign(unsigned A) { 2219 Flags = (Flags & ~OrigAlign) | 2220 (uint64_t(Log2_32(A) + 1) << OrigAlignOffs); 2221 } 2222 2223 unsigned getByValSize() const { 2224 return (unsigned)((Flags & ByValSize) >> ByValSizeOffs); 2225 } 2226 void setByValSize(unsigned S) { 2227 Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs); 2228 } 2229 2230 /// getArgFlagsString - Returns the flags as a string, eg: "zext align:4". 2231 std::string getArgFlagsString(); 2232 2233 /// getRawBits - Represent the flags as a bunch of bits. 2234 uint64_t getRawBits() const { return Flags; } 2235 }; 2236} 2237 2238/// ARG_FLAGSSDNode - Leaf node holding parameter flags. 2239class ARG_FLAGSSDNode : public SDNode { 2240 ISD::ArgFlagsTy TheFlags; 2241 friend class SelectionDAG; 2242 explicit ARG_FLAGSSDNode(ISD::ArgFlagsTy Flags) 2243 : SDNode(ISD::ARG_FLAGS, DebugLoc::getUnknownLoc(), 2244 getSDVTList(MVT::Other)), TheFlags(Flags) { 2245 } 2246public: 2247 ISD::ArgFlagsTy getArgFlags() const { return TheFlags; } 2248 2249 static bool classof(const ARG_FLAGSSDNode *) { return true; } 2250 static bool classof(const SDNode *N) { 2251 return N->getOpcode() == ISD::ARG_FLAGS; 2252 } 2253}; 2254 2255/// CallSDNode - Node for calls -- ISD::CALL. 2256class CallSDNode : public SDNode { 2257 unsigned CallingConv; 2258 bool IsVarArg; 2259 bool IsTailCall; 2260 // We might eventually want a full-blown Attributes for the result; that 2261 // will expand the size of the representation. At the moment we only 2262 // need Inreg. 2263 bool Inreg; 2264 friend class SelectionDAG; 2265 CallSDNode(unsigned cc, DebugLoc dl, bool isvararg, bool istailcall, 2266 bool isinreg, SDVTList VTs, const SDValue *Operands, 2267 unsigned numOperands) 2268 : SDNode(ISD::CALL, dl, VTs, Operands, numOperands), 2269 CallingConv(cc), IsVarArg(isvararg), IsTailCall(istailcall), 2270 Inreg(isinreg) {} 2271public: 2272 unsigned getCallingConv() const { return CallingConv; } 2273 unsigned isVarArg() const { return IsVarArg; } 2274 unsigned isTailCall() const { return IsTailCall; } 2275 unsigned isInreg() const { return Inreg; } 2276 2277 /// Set this call to not be marked as a tail call. Normally setter 2278 /// methods in SDNodes are unsafe because it breaks the CSE map, 2279 /// but we don't include the tail call flag for calls so it's ok 2280 /// in this case. 2281 void setNotTailCall() { IsTailCall = false; } 2282 2283 SDValue getChain() const { return getOperand(0); } 2284 SDValue getCallee() const { return getOperand(1); } 2285 2286 unsigned getNumArgs() const { return (getNumOperands() - 2) / 2; } 2287 SDValue getArg(unsigned i) const { return getOperand(2+2*i); } 2288 SDValue getArgFlagsVal(unsigned i) const { 2289 return getOperand(3+2*i); 2290 } 2291 ISD::ArgFlagsTy getArgFlags(unsigned i) const { 2292 return cast<ARG_FLAGSSDNode>(getArgFlagsVal(i).getNode())->getArgFlags(); 2293 } 2294 2295 unsigned getNumRetVals() const { return getNumValues() - 1; } 2296 MVT getRetValType(unsigned i) const { return getValueType(i); } 2297 2298 static bool classof(const CallSDNode *) { return true; } 2299 static bool classof(const SDNode *N) { 2300 return N->getOpcode() == ISD::CALL; 2301 } 2302}; 2303 2304/// VTSDNode - This class is used to represent MVT's, which are used 2305/// to parameterize some operations. 2306class VTSDNode : public SDNode { 2307 MVT ValueType; 2308 friend class SelectionDAG; 2309 explicit VTSDNode(MVT VT) 2310 : SDNode(ISD::VALUETYPE, DebugLoc::getUnknownLoc(), 2311 getSDVTList(MVT::Other)), ValueType(VT) { 2312 } 2313public: 2314 2315 MVT getVT() const { return ValueType; } 2316 2317 static bool classof(const VTSDNode *) { return true; } 2318 static bool classof(const SDNode *N) { 2319 return N->getOpcode() == ISD::VALUETYPE; 2320 } 2321}; 2322 2323/// LSBaseSDNode - Base class for LoadSDNode and StoreSDNode 2324/// 2325class LSBaseSDNode : public MemSDNode { 2326 //! Operand array for load and store 2327 /*! 2328 \note Moving this array to the base class captures more 2329 common functionality shared between LoadSDNode and 2330 StoreSDNode 2331 */ 2332 SDUse Ops[4]; 2333public: 2334 LSBaseSDNode(ISD::NodeType NodeTy, DebugLoc dl, SDValue *Operands, 2335 unsigned numOperands, SDVTList VTs, ISD::MemIndexedMode AM, 2336 MVT VT, const Value *SV, int SVO, unsigned Align, bool Vol) 2337 : MemSDNode(NodeTy, dl, VTs, VT, SV, SVO, Align, Vol) { 2338 assert(Align != 0 && "Loads and stores should have non-zero aligment"); 2339 SubclassData |= AM << 2; 2340 assert(getAddressingMode() == AM && "MemIndexedMode encoding error!"); 2341 InitOperands(Ops, Operands, numOperands); 2342 assert((getOffset().getOpcode() == ISD::UNDEF || isIndexed()) && 2343 "Only indexed loads and stores have a non-undef offset operand"); 2344 } 2345 2346 const SDValue &getOffset() const { 2347 return getOperand(getOpcode() == ISD::LOAD ? 2 : 3); 2348 } 2349 2350 /// getAddressingMode - Return the addressing mode for this load or store: 2351 /// unindexed, pre-inc, pre-dec, post-inc, or post-dec. 2352 ISD::MemIndexedMode getAddressingMode() const { 2353 return ISD::MemIndexedMode((SubclassData >> 2) & 7); 2354 } 2355 2356 /// isIndexed - Return true if this is a pre/post inc/dec load/store. 2357 bool isIndexed() const { return getAddressingMode() != ISD::UNINDEXED; } 2358 2359 /// isUnindexed - Return true if this is NOT a pre/post inc/dec load/store. 2360 bool isUnindexed() const { return getAddressingMode() == ISD::UNINDEXED; } 2361 2362 static bool classof(const LSBaseSDNode *) { return true; } 2363 static bool classof(const SDNode *N) { 2364 return N->getOpcode() == ISD::LOAD || 2365 N->getOpcode() == ISD::STORE; 2366 } 2367}; 2368 2369/// LoadSDNode - This class is used to represent ISD::LOAD nodes. 2370/// 2371class LoadSDNode : public LSBaseSDNode { 2372 friend class SelectionDAG; 2373 LoadSDNode(SDValue *ChainPtrOff, DebugLoc dl, SDVTList VTs, 2374 ISD::MemIndexedMode AM, ISD::LoadExtType ETy, MVT LVT, 2375 const Value *SV, int O=0, unsigned Align=0, bool Vol=false) 2376 : LSBaseSDNode(ISD::LOAD, dl, ChainPtrOff, 3, 2377 VTs, AM, LVT, SV, O, Align, Vol) { 2378 SubclassData |= (unsigned short)ETy; 2379 assert(getExtensionType() == ETy && "LoadExtType encoding error!"); 2380 } 2381public: 2382 2383 /// getExtensionType - Return whether this is a plain node, 2384 /// or one of the varieties of value-extending loads. 2385 ISD::LoadExtType getExtensionType() const { 2386 return ISD::LoadExtType(SubclassData & 3); 2387 } 2388 2389 const SDValue &getBasePtr() const { return getOperand(1); } 2390 const SDValue &getOffset() const { return getOperand(2); } 2391 2392 static bool classof(const LoadSDNode *) { return true; } 2393 static bool classof(const SDNode *N) { 2394 return N->getOpcode() == ISD::LOAD; 2395 } 2396}; 2397 2398/// StoreSDNode - This class is used to represent ISD::STORE nodes. 2399/// 2400class StoreSDNode : public LSBaseSDNode { 2401 friend class SelectionDAG; 2402 StoreSDNode(SDValue *ChainValuePtrOff, DebugLoc dl, SDVTList VTs, 2403 ISD::MemIndexedMode AM, bool isTrunc, MVT SVT, 2404 const Value *SV, int O=0, unsigned Align=0, bool Vol=false) 2405 : LSBaseSDNode(ISD::STORE, dl, ChainValuePtrOff, 4, 2406 VTs, AM, SVT, SV, O, Align, Vol) { 2407 SubclassData |= (unsigned short)isTrunc; 2408 assert(isTruncatingStore() == isTrunc && "isTrunc encoding error!"); 2409 } 2410public: 2411 2412 /// isTruncatingStore - Return true if the op does a truncation before store. 2413 /// For integers this is the same as doing a TRUNCATE and storing the result. 2414 /// For floats, it is the same as doing an FP_ROUND and storing the result. 2415 bool isTruncatingStore() const { return SubclassData & 1; } 2416 2417 const SDValue &getValue() const { return getOperand(1); } 2418 const SDValue &getBasePtr() const { return getOperand(2); } 2419 const SDValue &getOffset() const { return getOperand(3); } 2420 2421 static bool classof(const StoreSDNode *) { return true; } 2422 static bool classof(const SDNode *N) { 2423 return N->getOpcode() == ISD::STORE; 2424 } 2425}; 2426 2427 2428class SDNodeIterator : public forward_iterator<SDNode, ptrdiff_t> { 2429 SDNode *Node; 2430 unsigned Operand; 2431 2432 SDNodeIterator(SDNode *N, unsigned Op) : Node(N), Operand(Op) {} 2433public: 2434 bool operator==(const SDNodeIterator& x) const { 2435 return Operand == x.Operand; 2436 } 2437 bool operator!=(const SDNodeIterator& x) const { return !operator==(x); } 2438 2439 const SDNodeIterator &operator=(const SDNodeIterator &I) { 2440 assert(I.Node == Node && "Cannot assign iterators to two different nodes!"); 2441 Operand = I.Operand; 2442 return *this; 2443 } 2444 2445 pointer operator*() const { 2446 return Node->getOperand(Operand).getNode(); 2447 } 2448 pointer operator->() const { return operator*(); } 2449 2450 SDNodeIterator& operator++() { // Preincrement 2451 ++Operand; 2452 return *this; 2453 } 2454 SDNodeIterator operator++(int) { // Postincrement 2455 SDNodeIterator tmp = *this; ++*this; return tmp; 2456 } 2457 2458 static SDNodeIterator begin(SDNode *N) { return SDNodeIterator(N, 0); } 2459 static SDNodeIterator end (SDNode *N) { 2460 return SDNodeIterator(N, N->getNumOperands()); 2461 } 2462 2463 unsigned getOperand() const { return Operand; } 2464 const SDNode *getNode() const { return Node; } 2465}; 2466 2467template <> struct GraphTraits<SDNode*> { 2468 typedef SDNode NodeType; 2469 typedef SDNodeIterator ChildIteratorType; 2470 static inline NodeType *getEntryNode(SDNode *N) { return N; } 2471 static inline ChildIteratorType child_begin(NodeType *N) { 2472 return SDNodeIterator::begin(N); 2473 } 2474 static inline ChildIteratorType child_end(NodeType *N) { 2475 return SDNodeIterator::end(N); 2476 } 2477}; 2478 2479/// LargestSDNode - The largest SDNode class. 2480/// 2481typedef LoadSDNode LargestSDNode; 2482 2483/// MostAlignedSDNode - The SDNode class with the greatest alignment 2484/// requirement. 2485/// 2486typedef ARG_FLAGSSDNode MostAlignedSDNode; 2487 2488namespace ISD { 2489 /// isNormalLoad - Returns true if the specified node is a non-extending 2490 /// and unindexed load. 2491 inline bool isNormalLoad(const SDNode *N) { 2492 const LoadSDNode *Ld = dyn_cast<LoadSDNode>(N); 2493 return Ld && Ld->getExtensionType() == ISD::NON_EXTLOAD && 2494 Ld->getAddressingMode() == ISD::UNINDEXED; 2495 } 2496 2497 /// isNON_EXTLoad - Returns true if the specified node is a non-extending 2498 /// load. 2499 inline bool isNON_EXTLoad(const SDNode *N) { 2500 return isa<LoadSDNode>(N) && 2501 cast<LoadSDNode>(N)->getExtensionType() == ISD::NON_EXTLOAD; 2502 } 2503 2504 /// isEXTLoad - Returns true if the specified node is a EXTLOAD. 2505 /// 2506 inline bool isEXTLoad(const SDNode *N) { 2507 return isa<LoadSDNode>(N) && 2508 cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD; 2509 } 2510 2511 /// isSEXTLoad - Returns true if the specified node is a SEXTLOAD. 2512 /// 2513 inline bool isSEXTLoad(const SDNode *N) { 2514 return isa<LoadSDNode>(N) && 2515 cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD; 2516 } 2517 2518 /// isZEXTLoad - Returns true if the specified node is a ZEXTLOAD. 2519 /// 2520 inline bool isZEXTLoad(const SDNode *N) { 2521 return isa<LoadSDNode>(N) && 2522 cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD; 2523 } 2524 2525 /// isUNINDEXEDLoad - Returns true if the specified node is an unindexed load. 2526 /// 2527 inline bool isUNINDEXEDLoad(const SDNode *N) { 2528 return isa<LoadSDNode>(N) && 2529 cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED; 2530 } 2531 2532 /// isNormalStore - Returns true if the specified node is a non-truncating 2533 /// and unindexed store. 2534 inline bool isNormalStore(const SDNode *N) { 2535 const StoreSDNode *St = dyn_cast<StoreSDNode>(N); 2536 return St && !St->isTruncatingStore() && 2537 St->getAddressingMode() == ISD::UNINDEXED; 2538 } 2539 2540 /// isNON_TRUNCStore - Returns true if the specified node is a non-truncating 2541 /// store. 2542 inline bool isNON_TRUNCStore(const SDNode *N) { 2543 return isa<StoreSDNode>(N) && !cast<StoreSDNode>(N)->isTruncatingStore(); 2544 } 2545 2546 /// isTRUNCStore - Returns true if the specified node is a truncating 2547 /// store. 2548 inline bool isTRUNCStore(const SDNode *N) { 2549 return isa<StoreSDNode>(N) && cast<StoreSDNode>(N)->isTruncatingStore(); 2550 } 2551 2552 /// isUNINDEXEDStore - Returns true if the specified node is an 2553 /// unindexed store. 2554 inline bool isUNINDEXEDStore(const SDNode *N) { 2555 return isa<StoreSDNode>(N) && 2556 cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED; 2557 } 2558} 2559 2560 2561} // end llvm namespace 2562 2563#endif 2564