1 //===-- llvm/CodeGen/SelectionDAGNodes.h - SelectionDAG Nodes ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the SDNode class and derived classes, which are used to
11 // represent the nodes and operations present in a SelectionDAG. These nodes
12 // and operations are machine code level operations, with some similarities to
13 // the GCC RTL representation.
15 // Clients should include the SelectionDAG.h file instead of this file directly.
17 //===----------------------------------------------------------------------===//
19 #ifndef LLVM_CODEGEN_SELECTIONDAGNODES_H
20 #define LLVM_CODEGEN_SELECTIONDAGNODES_H
22 #include "llvm/Value.h"
23 #include "llvm/ADT/FoldingSet.h"
24 #include "llvm/ADT/GraphTraits.h"
25 #include "llvm/ADT/iterator"
26 #include "llvm/CodeGen/ValueTypes.h"
27 #include "llvm/Support/DataTypes.h"
34 class MachineBasicBlock;
35 class MachineConstantPoolValue;
37 template <typename T> struct DenseMapKeyInfo;
38 template <typename T> struct simplify_type;
39 template <typename T> struct ilist_traits;
40 template<typename NodeTy, typename Traits> class iplist;
41 template<typename NodeTy> class ilist_iterator;
43 /// SDVTList - This represents a list of ValueType's that has been intern'd by
44 /// a SelectionDAG. Instances of this simple value class are returned by
45 /// SelectionDAG::getVTList(...).
48 const MVT::ValueType *VTs;
49 unsigned short NumVTs;
52 /// ISD namespace - This namespace contains an enum which represents all of the
53 /// SelectionDAG node types and value types.
56 namespace ParamFlags {
59 ZExt = 1<<0, ///< Parameter should be zero extended
61 SExt = 1<<1, ///< Parameter should be sign extended
63 InReg = 1<<2, ///< Parameter should be passed in register
65 StructReturn = 1<<3, ///< Hidden struct-return pointer
67 ByVal = 1<<4, ///< Struct passed by value
69 OrigAlignment = 0x1F<<27,
70 OrigAlignmentOffs = 27
74 //===--------------------------------------------------------------------===//
75 /// ISD::NodeType enum - This enum defines all of the operators valid in a
79 // DELETED_NODE - This is an illegal flag value that is used to catch
80 // errors. This opcode is not a legal opcode for any node.
83 // EntryToken - This is the marker used to indicate the start of the region.
86 // Token factor - This node takes multiple tokens as input and produces a
87 // single token result. This is used to represent the fact that the operand
88 // operators are independent of each other.
91 // AssertSext, AssertZext - These nodes record if a register contains a
92 // value that has already been zero or sign extended from a narrower type.
93 // These nodes take two operands. The first is the node that has already
94 // been extended, and the second is a value type node indicating the width
96 AssertSext, AssertZext,
98 // Various leaf nodes.
99 STRING, BasicBlock, VALUETYPE, CONDCODE, Register,
100 Constant, ConstantFP,
101 GlobalAddress, GlobalTLSAddress, FrameIndex,
102 JumpTable, ConstantPool, ExternalSymbol,
104 // The address of the GOT
107 // FRAMEADDR, RETURNADDR - These nodes represent llvm.frameaddress and
108 // llvm.returnaddress on the DAG. These nodes take one operand, the index
109 // of the frame or return address to return. An index of zero corresponds
110 // to the current function's frame or return address, an index of one to the
111 // parent's frame or return address, and so on.
112 FRAMEADDR, RETURNADDR,
114 // FRAME_TO_ARGS_OFFSET - This node represents offset from frame pointer to
115 // first (possible) on-stack argument. This is needed for correct stack
116 // adjustment during unwind.
117 FRAME_TO_ARGS_OFFSET,
119 // RESULT, OUTCHAIN = EXCEPTIONADDR(INCHAIN) - This node represents the
120 // address of the exception block on entry to an landing pad block.
123 // RESULT, OUTCHAIN = EHSELECTION(INCHAIN, EXCEPTION) - This node represents
124 // the selection index of the exception thrown.
127 // OUTCHAIN = EH_RETURN(INCHAIN, OFFSET, HANDLER) - This node represents
128 // 'eh_return' gcc dwarf builtin, which is used to return from
129 // exception. The general meaning is: adjust stack by OFFSET and pass
130 // execution to HANDLER. Many platform-related details also :)
133 // TargetConstant* - Like Constant*, but the DAG does not do any folding or
134 // simplification of the constant.
138 // TargetGlobalAddress - Like GlobalAddress, but the DAG does no folding or
139 // anything else with this node, and this is valid in the target-specific
140 // dag, turning into a GlobalAddress operand.
142 TargetGlobalTLSAddress,
146 TargetExternalSymbol,
148 /// RESULT = INTRINSIC_WO_CHAIN(INTRINSICID, arg1, arg2, ...)
149 /// This node represents a target intrinsic function with no side effects.
150 /// The first operand is the ID number of the intrinsic from the
151 /// llvm::Intrinsic namespace. The operands to the intrinsic follow. The
152 /// node has returns the result of the intrinsic.
155 /// RESULT,OUTCHAIN = INTRINSIC_W_CHAIN(INCHAIN, INTRINSICID, arg1, ...)
156 /// This node represents a target intrinsic function with side effects that
157 /// returns a result. The first operand is a chain pointer. The second is
158 /// the ID number of the intrinsic from the llvm::Intrinsic namespace. The
159 /// operands to the intrinsic follow. The node has two results, the result
160 /// of the intrinsic and an output chain.
163 /// OUTCHAIN = INTRINSIC_VOID(INCHAIN, INTRINSICID, arg1, arg2, ...)
164 /// This node represents a target intrinsic function with side effects that
165 /// does not return a result. The first operand is a chain pointer. The
166 /// second is the ID number of the intrinsic from the llvm::Intrinsic
167 /// namespace. The operands to the intrinsic follow.
170 // CopyToReg - This node has three operands: a chain, a register number to
171 // set to this value, and a value.
174 // CopyFromReg - This node indicates that the input value is a virtual or
175 // physical register that is defined outside of the scope of this
176 // SelectionDAG. The register is available from the RegSDNode object.
179 // UNDEF - An undefined node
182 /// FORMAL_ARGUMENTS(CHAIN, CC#, ISVARARG, FLAG0, ..., FLAGn) - This node
183 /// represents the formal arguments for a function. CC# is a Constant value
184 /// indicating the calling convention of the function, and ISVARARG is a
185 /// flag that indicates whether the function is varargs or not. This node
186 /// has one result value for each incoming argument, plus one for the output
187 /// chain. It must be custom legalized. See description of CALL node for
188 /// FLAG argument contents explanation.
192 /// RV1, RV2...RVn, CHAIN = CALL(CHAIN, CC#, ISVARARG, ISTAILCALL, CALLEE,
193 /// ARG0, FLAG0, ARG1, FLAG1, ... ARGn, FLAGn)
194 /// This node represents a fully general function call, before the legalizer
195 /// runs. This has one result value for each argument / flag pair, plus
196 /// a chain result. It must be custom legalized. Flag argument indicates
197 /// misc. argument attributes. Currently:
199 /// Bit 1 - 'inreg' attribute
200 /// Bit 2 - 'sret' attribute
201 /// Bits 31:27 - argument ABI alignment in the first argument piece and
202 /// alignment '1' in other argument pieces.
205 // EXTRACT_ELEMENT - This is used to get the first or second (determined by
206 // a Constant, which is required to be operand #1), element of the aggregate
207 // value specified as operand #0. This is only for use before legalization,
208 // for values that will be broken into multiple registers.
211 // BUILD_PAIR - This is the opposite of EXTRACT_ELEMENT in some ways. Given
212 // two values of the same integer value type, this produces a value twice as
213 // big. Like EXTRACT_ELEMENT, this can only be used before legalization.
216 // MERGE_VALUES - This node takes multiple discrete operands and returns
217 // them all as its individual results. This nodes has exactly the same
218 // number of inputs and outputs, and is only valid before legalization.
219 // This node is useful for some pieces of the code generator that want to
220 // think about a single node with multiple results, not multiple nodes.
223 // Simple integer binary arithmetic operators.
224 ADD, SUB, MUL, SDIV, UDIV, SREM, UREM,
226 // CARRY_FALSE - This node is used when folding other nodes,
227 // like ADDC/SUBC, which indicate the carry result is always false.
230 // Carry-setting nodes for multiple precision addition and subtraction.
231 // These nodes take two operands of the same value type, and produce two
232 // results. The first result is the normal add or sub result, the second
233 // result is the carry flag result.
236 // Carry-using nodes for multiple precision addition and subtraction. These
237 // nodes take three operands: The first two are the normal lhs and rhs to
238 // the add or sub, and the third is the input carry flag. These nodes
239 // produce two results; the normal result of the add or sub, and the output
240 // carry flag. These nodes both read and write a carry flag to allow them
241 // to them to be chained together for add and sub of arbitrarily large
245 // Simple binary floating point operators.
246 FADD, FSUB, FMUL, FDIV, FREM,
248 // FCOPYSIGN(X, Y) - Return the value of X with the sign of Y. NOTE: This
249 // DAG node does not require that X and Y have the same type, just that they
250 // are both floating point. X and the result must have the same type.
251 // FCOPYSIGN(f32, f64) is allowed.
254 /// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a vector
255 /// with the specified, possibly variable, elements. The number of elements
256 /// is required to be a power of two.
259 /// INSERT_VECTOR_ELT(VECTOR, VAL, IDX) - Returns VECTOR with the element
260 /// at IDX replaced with VAL.
263 /// EXTRACT_VECTOR_ELT(VECTOR, IDX) - Returns a single element from VECTOR
264 /// identified by the (potentially variable) element number IDX.
267 /// CONCAT_VECTORS(VECTOR0, VECTOR1, ...) - Given a number of values of
268 /// vector type with the same length and element type, this produces a
269 /// concatenated vector result value, with length equal to the sum of the
270 /// lengths of the input vectors.
273 /// EXTRACT_SUBVECTOR(VECTOR, IDX) - Returns a subvector from VECTOR (an
274 /// vector value) starting with the (potentially variable) element number
275 /// IDX, which must be a multiple of the result vector length.
278 /// VECTOR_SHUFFLE(VEC1, VEC2, SHUFFLEVEC) - Returns a vector, of the same
279 /// type as VEC1/VEC2. SHUFFLEVEC is a BUILD_VECTOR of constant int values
280 /// (regardless of whether its datatype is legal or not) that indicate
281 /// which value each result element will get. The elements of VEC1/VEC2 are
282 /// enumerated in order. This is quite similar to the Altivec 'vperm'
283 /// instruction, except that the indices must be constants and are in terms
284 /// of the element size of VEC1/VEC2, not in terms of bytes.
287 /// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a
288 /// scalar value into the low element of the resultant vector type. The top
289 /// elements of the vector are undefined.
292 // MULHU/MULHS - Multiply high - Multiply two integers of type iN, producing
293 // an unsigned/signed value of type i[2*n], then return the top part.
296 // Bitwise operators - logical and, logical or, logical xor, shift left,
297 // shift right algebraic (shift in sign bits), shift right logical (shift in
298 // zeroes), rotate left, rotate right, and byteswap.
299 AND, OR, XOR, SHL, SRA, SRL, ROTL, ROTR, BSWAP,
301 // Counting operators
304 // Select(COND, TRUEVAL, FALSEVAL)
307 // Select with condition operator - This selects between a true value and
308 // a false value (ops #2 and #3) based on the boolean result of comparing
309 // the lhs and rhs (ops #0 and #1) of a conditional expression with the
310 // condition code in op #4, a CondCodeSDNode.
313 // SetCC operator - This evaluates to a boolean (i1) true value if the
314 // condition is true. The operands to this are the left and right operands
315 // to compare (ops #0, and #1) and the condition code to compare them with
316 // (op #2) as a CondCodeSDNode.
319 // SHL_PARTS/SRA_PARTS/SRL_PARTS - These operators are used for expanded
320 // integer shift operations, just like ADD/SUB_PARTS. The operation
322 // [Lo,Hi] = op [LoLHS,HiLHS], Amt
323 SHL_PARTS, SRA_PARTS, SRL_PARTS,
325 // Conversion operators. These are all single input single output
326 // operations. For all of these, the result type must be strictly
327 // wider or narrower (depending on the operation) than the source
330 // SIGN_EXTEND - Used for integer types, replicating the sign bit
334 // ZERO_EXTEND - Used for integer types, zeroing the new bits.
337 // ANY_EXTEND - Used for integer types. The high bits are undefined.
340 // TRUNCATE - Completely drop the high bits.
343 // [SU]INT_TO_FP - These operators convert integers (whose interpreted sign
344 // depends on the first letter) to floating point.
348 // SIGN_EXTEND_INREG - This operator atomically performs a SHL/SRA pair to
349 // sign extend a small value in a large integer register (e.g. sign
350 // extending the low 8 bits of a 32-bit register to fill the top 24 bits
351 // with the 7th bit). The size of the smaller type is indicated by the 1th
352 // operand, a ValueType node.
355 // FP_TO_[US]INT - Convert a floating point value to a signed or unsigned
360 // FP_ROUND - Perform a rounding operation from the current
361 // precision down to the specified precision (currently always 64->32).
364 // FP_ROUND_INREG - This operator takes a floating point register, and
365 // rounds it to a floating point value. It then promotes it and returns it
366 // in a register of the same size. This operation effectively just discards
367 // excess precision. The type to round down to is specified by the 1th
368 // operation, a VTSDNode (currently always 64->32->64).
371 // FP_EXTEND - Extend a smaller FP type into a larger FP type.
374 // BIT_CONVERT - Theis operator converts between integer and FP values, as
375 // if one was stored to memory as integer and the other was loaded from the
376 // same address (or equivalently for vector format conversions, etc). The
377 // source and result are required to have the same bit size (e.g.
378 // f32 <-> i32). This can also be used for int-to-int or fp-to-fp
379 // conversions, but that is a noop, deleted by getNode().
382 // FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI - Perform unary floating point
383 // negation, absolute value, square root, sine and cosine, and powi
385 FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI,
387 // LOAD and STORE have token chains as their first operand, then the same
388 // operands as an LLVM load/store instruction, then an offset node that
389 // is added / subtracted from the base pointer to form the address (for
390 // indexed memory ops).
393 // TRUNCSTORE - This operators truncates (for integer) or rounds (for FP) a
394 // value and stores it to memory in one operation. This can be used for
395 // either integer or floating point operands. The first four operands of
396 // this are the same as a standard store. The fifth is the ValueType to
397 // store it as (which will be smaller than the source value).
400 // DYNAMIC_STACKALLOC - Allocate some number of bytes on the stack aligned
401 // to a specified boundary. This node always has two return values: a new
402 // stack pointer value and a chain. The first operand is the token chain,
403 // the second is the number of bytes to allocate, and the third is the
404 // alignment boundary. The size is guaranteed to be a multiple of the stack
405 // alignment, and the alignment is guaranteed to be bigger than the stack
406 // alignment (if required) or 0 to get standard stack alignment.
409 // Control flow instructions. These all have token chains.
411 // BR - Unconditional branch. The first operand is the chain
412 // operand, the second is the MBB to branch to.
415 // BRIND - Indirect branch. The first operand is the chain, the second
416 // is the value to branch to, which must be of the same type as the target's
420 // BR_JT - Jumptable branch. The first operand is the chain, the second
421 // is the jumptable index, the last one is the jumptable entry index.
424 // BRCOND - Conditional branch. The first operand is the chain,
425 // the second is the condition, the third is the block to branch
426 // to if the condition is true.
429 // BR_CC - Conditional branch. The behavior is like that of SELECT_CC, in
430 // that the condition is represented as condition code, and two nodes to
431 // compare, rather than as a combined SetCC node. The operands in order are
432 // chain, cc, lhs, rhs, block to branch to if condition is true.
435 // RET - Return from function. The first operand is the chain,
436 // and any subsequent operands are pairs of return value and return value
437 // signness for the function. This operation can have variable number of
441 // INLINEASM - Represents an inline asm block. This node always has two
442 // return values: a chain and a flag result. The inputs are as follows:
443 // Operand #0 : Input chain.
444 // Operand #1 : a ExternalSymbolSDNode with a pointer to the asm string.
445 // Operand #2n+2: A RegisterNode.
446 // Operand #2n+3: A TargetConstant, indicating if the reg is a use/def
447 // Operand #last: Optional, an incoming flag.
450 // LABEL - Represents a label in mid basic block used to track
451 // locations needed for debug and exception handling tables. This node
453 // Operand #0 : input chain.
454 // Operand #1 : module unique number use to identify the label.
457 // STACKSAVE - STACKSAVE has one operand, an input chain. It produces a
458 // value, the same type as the pointer type for the system, and an output
462 // STACKRESTORE has two operands, an input chain and a pointer to restore to
463 // it returns an output chain.
466 // MEMSET/MEMCPY/MEMMOVE - The first operand is the chain, and the rest
467 // correspond to the operands of the LLVM intrinsic functions. The only
468 // result is a token chain. The alignment argument is guaranteed to be a
474 // CALLSEQ_START/CALLSEQ_END - These operators mark the beginning and end of
475 // a call sequence, and carry arbitrary information that target might want
476 // to know. The first operand is a chain, the rest are specified by the
477 // target and not touched by the DAG optimizers.
478 CALLSEQ_START, // Beginning of a call sequence
479 CALLSEQ_END, // End of a call sequence
481 // VAARG - VAARG has three operands: an input chain, a pointer, and a
482 // SRCVALUE. It returns a pair of values: the vaarg value and a new chain.
485 // VACOPY - VACOPY has five operands: an input chain, a destination pointer,
486 // a source pointer, a SRCVALUE for the destination, and a SRCVALUE for the
490 // VAEND, VASTART - VAEND and VASTART have three operands: an input chain, a
491 // pointer, and a SRCVALUE.
494 // SRCVALUE - This corresponds to a Value*, and is used to associate memory
495 // locations with their value. This allows one use alias analysis
496 // information in the backend.
499 // PCMARKER - This corresponds to the pcmarker intrinsic.
502 // READCYCLECOUNTER - This corresponds to the readcyclecounter intrinsic.
503 // The only operand is a chain and a value and a chain are produced. The
504 // value is the contents of the architecture specific cycle counter like
505 // register (or other high accuracy low latency clock source)
508 // HANDLENODE node - Used as a handle for various purposes.
511 // LOCATION - This node is used to represent a source location for debug
512 // info. It takes token chain as input, then a line number, then a column
513 // number, then a filename, then a working dir. It produces a token chain
517 // DEBUG_LOC - This node is used to represent source line information
518 // embedded in the code. It takes a token chain as input, then a line
519 // number, then a column then a file id (provided by MachineModuleInfo.) It
520 // produces a token chain as output.
523 // BUILTIN_OP_END - This must be the last enum value in this list.
529 /// isBuildVectorAllOnes - Return true if the specified node is a
530 /// BUILD_VECTOR where all of the elements are ~0 or undef.
531 bool isBuildVectorAllOnes(const SDNode *N);
533 /// isBuildVectorAllZeros - Return true if the specified node is a
534 /// BUILD_VECTOR where all of the elements are 0 or undef.
535 bool isBuildVectorAllZeros(const SDNode *N);
537 //===--------------------------------------------------------------------===//
538 /// MemIndexedMode enum - This enum defines the load / store indexed
539 /// addressing modes.
541 /// UNINDEXED "Normal" load / store. The effective address is already
542 /// computed and is available in the base pointer. The offset
543 /// operand is always undefined. In addition to producing a
544 /// chain, an unindexed load produces one value (result of the
545 /// load); an unindexed store does not produces a value.
547 /// PRE_INC Similar to the unindexed mode where the effective address is
548 /// PRE_DEC the value of the base pointer add / subtract the offset.
549 /// It considers the computation as being folded into the load /
550 /// store operation (i.e. the load / store does the address
551 /// computation as well as performing the memory transaction).
552 /// The base operand is always undefined. In addition to
553 /// producing a chain, pre-indexed load produces two values
554 /// (result of the load and the result of the address
555 /// computation); a pre-indexed store produces one value (result
556 /// of the address computation).
558 /// POST_INC The effective address is the value of the base pointer. The
559 /// POST_DEC value of the offset operand is then added to / subtracted
560 /// from the base after memory transaction. In addition to
561 /// producing a chain, post-indexed load produces two values
562 /// (the result of the load and the result of the base +/- offset
563 /// computation); a post-indexed store produces one value (the
564 /// the result of the base +/- offset computation).
566 enum MemIndexedMode {
575 //===--------------------------------------------------------------------===//
576 /// LoadExtType enum - This enum defines the three variants of LOADEXT
577 /// (load with extension).
579 /// SEXTLOAD loads the integer operand and sign extends it to a larger
580 /// integer result type.
581 /// ZEXTLOAD loads the integer operand and zero extends it to a larger
582 /// integer result type.
583 /// EXTLOAD is used for three things: floating point extending loads,
584 /// integer extending loads [the top bits are undefined], and vector
585 /// extending loads [load into low elt].
595 //===--------------------------------------------------------------------===//
596 /// ISD::CondCode enum - These are ordered carefully to make the bitfields
597 /// below work out, when considering SETFALSE (something that never exists
598 /// dynamically) as 0. "U" -> Unsigned (for integer operands) or Unordered
599 /// (for floating point), "L" -> Less than, "G" -> Greater than, "E" -> Equal
600 /// to. If the "N" column is 1, the result of the comparison is undefined if
601 /// the input is a NAN.
603 /// All of these (except for the 'always folded ops') should be handled for
604 /// floating point. For integer, only the SETEQ,SETNE,SETLT,SETLE,SETGT,
605 /// SETGE,SETULT,SETULE,SETUGT, and SETUGE opcodes are used.
607 /// Note that these are laid out in a specific order to allow bit-twiddling
608 /// to transform conditions.
610 // Opcode N U L G E Intuitive operation
611 SETFALSE, // 0 0 0 0 Always false (always folded)
612 SETOEQ, // 0 0 0 1 True if ordered and equal
613 SETOGT, // 0 0 1 0 True if ordered and greater than
614 SETOGE, // 0 0 1 1 True if ordered and greater than or equal
615 SETOLT, // 0 1 0 0 True if ordered and less than
616 SETOLE, // 0 1 0 1 True if ordered and less than or equal
617 SETONE, // 0 1 1 0 True if ordered and operands are unequal
618 SETO, // 0 1 1 1 True if ordered (no nans)
619 SETUO, // 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
620 SETUEQ, // 1 0 0 1 True if unordered or equal
621 SETUGT, // 1 0 1 0 True if unordered or greater than
622 SETUGE, // 1 0 1 1 True if unordered, greater than, or equal
623 SETULT, // 1 1 0 0 True if unordered or less than
624 SETULE, // 1 1 0 1 True if unordered, less than, or equal
625 SETUNE, // 1 1 1 0 True if unordered or not equal
626 SETTRUE, // 1 1 1 1 Always true (always folded)
627 // Don't care operations: undefined if the input is a nan.
628 SETFALSE2, // 1 X 0 0 0 Always false (always folded)
629 SETEQ, // 1 X 0 0 1 True if equal
630 SETGT, // 1 X 0 1 0 True if greater than
631 SETGE, // 1 X 0 1 1 True if greater than or equal
632 SETLT, // 1 X 1 0 0 True if less than
633 SETLE, // 1 X 1 0 1 True if less than or equal
634 SETNE, // 1 X 1 1 0 True if not equal
635 SETTRUE2, // 1 X 1 1 1 Always true (always folded)
637 SETCC_INVALID // Marker value.
640 /// isSignedIntSetCC - Return true if this is a setcc instruction that
641 /// performs a signed comparison when used with integer operands.
642 inline bool isSignedIntSetCC(CondCode Code) {
643 return Code == SETGT || Code == SETGE || Code == SETLT || Code == SETLE;
646 /// isUnsignedIntSetCC - Return true if this is a setcc instruction that
647 /// performs an unsigned comparison when used with integer operands.
648 inline bool isUnsignedIntSetCC(CondCode Code) {
649 return Code == SETUGT || Code == SETUGE || Code == SETULT || Code == SETULE;
652 /// isTrueWhenEqual - Return true if the specified condition returns true if
653 /// the two operands to the condition are equal. Note that if one of the two
654 /// operands is a NaN, this value is meaningless.
655 inline bool isTrueWhenEqual(CondCode Cond) {
656 return ((int)Cond & 1) != 0;
659 /// getUnorderedFlavor - This function returns 0 if the condition is always
660 /// false if an operand is a NaN, 1 if the condition is always true if the
661 /// operand is a NaN, and 2 if the condition is undefined if the operand is a
663 inline unsigned getUnorderedFlavor(CondCode Cond) {
664 return ((int)Cond >> 3) & 3;
667 /// getSetCCInverse - Return the operation corresponding to !(X op Y), where
668 /// 'op' is a valid SetCC operation.
669 CondCode getSetCCInverse(CondCode Operation, bool isInteger);
671 /// getSetCCSwappedOperands - Return the operation corresponding to (Y op X)
672 /// when given the operation for (X op Y).
673 CondCode getSetCCSwappedOperands(CondCode Operation);
675 /// getSetCCOrOperation - Return the result of a logical OR between different
676 /// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This
677 /// function returns SETCC_INVALID if it is not possible to represent the
678 /// resultant comparison.
679 CondCode getSetCCOrOperation(CondCode Op1, CondCode Op2, bool isInteger);
681 /// getSetCCAndOperation - Return the result of a logical AND between
682 /// different comparisons of identical values: ((X op1 Y) & (X op2 Y)). This
683 /// function returns SETCC_INVALID if it is not possible to represent the
684 /// resultant comparison.
685 CondCode getSetCCAndOperation(CondCode Op1, CondCode Op2, bool isInteger);
686 } // end llvm::ISD namespace
689 //===----------------------------------------------------------------------===//
690 /// SDOperand - Unlike LLVM values, Selection DAG nodes may return multiple
691 /// values as the result of a computation. Many nodes return multiple values,
692 /// from loads (which define a token and a return value) to ADDC (which returns
693 /// a result and a carry value), to calls (which may return an arbitrary number
696 /// As such, each use of a SelectionDAG computation must indicate the node that
697 /// computes it as well as which return value to use from that node. This pair
698 /// of information is represented with the SDOperand value type.
702 SDNode *Val; // The node defining the value we are using.
703 unsigned ResNo; // Which return value of the node we are using.
705 SDOperand() : Val(0), ResNo(0) {}
706 SDOperand(SDNode *val, unsigned resno) : Val(val), ResNo(resno) {}
708 bool operator==(const SDOperand &O) const {
709 return Val == O.Val && ResNo == O.ResNo;
711 bool operator!=(const SDOperand &O) const {
712 return !operator==(O);
714 bool operator<(const SDOperand &O) const {
715 return Val < O.Val || (Val == O.Val && ResNo < O.ResNo);
718 SDOperand getValue(unsigned R) const {
719 return SDOperand(Val, R);
722 // isOperand - Return true if this node is an operand of N.
723 bool isOperand(SDNode *N) const;
725 /// getValueType - Return the ValueType of the referenced return value.
727 inline MVT::ValueType getValueType() const;
729 // Forwarding methods - These forward to the corresponding methods in SDNode.
730 inline unsigned getOpcode() const;
731 inline unsigned getNumOperands() const;
732 inline const SDOperand &getOperand(unsigned i) const;
733 inline uint64_t getConstantOperandVal(unsigned i) const;
734 inline bool isTargetOpcode() const;
735 inline unsigned getTargetOpcode() const;
737 /// hasOneUse - Return true if there is exactly one operation using this
738 /// result value of the defining operator.
739 inline bool hasOneUse() const;
743 template<> struct DenseMapKeyInfo<SDOperand> {
744 static inline SDOperand getEmptyKey() { return SDOperand((SDNode*)-1, -1U); }
745 static inline SDOperand getTombstoneKey() { return SDOperand((SDNode*)-1, 0);}
746 static unsigned getHashValue(const SDOperand &Val) {
747 return (unsigned)((uintptr_t)Val.Val >> 4) ^
748 (unsigned)((uintptr_t)Val.Val >> 9) + Val.ResNo;
750 static bool isPod() { return true; }
753 /// simplify_type specializations - Allow casting operators to work directly on
754 /// SDOperands as if they were SDNode*'s.
755 template<> struct simplify_type<SDOperand> {
756 typedef SDNode* SimpleType;
757 static SimpleType getSimplifiedValue(const SDOperand &Val) {
758 return static_cast<SimpleType>(Val.Val);
761 template<> struct simplify_type<const SDOperand> {
762 typedef SDNode* SimpleType;
763 static SimpleType getSimplifiedValue(const SDOperand &Val) {
764 return static_cast<SimpleType>(Val.Val);
769 /// SDNode - Represents one node in the SelectionDAG.
771 class SDNode : public FoldingSetNode {
772 /// NodeType - The operation that this node performs.
774 unsigned short NodeType;
776 /// OperandsNeedDelete - This is true if OperandList was new[]'d. If true,
777 /// then they will be delete[]'d when the node is destroyed.
778 bool OperandsNeedDelete : 1;
780 /// NodeId - Unique id per SDNode in the DAG.
783 /// OperandList - The values that are used by this operation.
785 SDOperand *OperandList;
787 /// ValueList - The types of the values this node defines. SDNode's may
788 /// define multiple values simultaneously.
789 const MVT::ValueType *ValueList;
791 /// NumOperands/NumValues - The number of entries in the Operand/Value list.
792 unsigned short NumOperands, NumValues;
794 /// Prev/Next pointers - These pointers form the linked list of of the
795 /// AllNodes list in the current DAG.
797 friend struct ilist_traits<SDNode>;
799 /// Uses - These are all of the SDNode's that use a value produced by this
801 SmallVector<SDNode*,3> Uses;
803 // Out-of-line virtual method to give class a home.
804 virtual void ANCHOR();
807 assert(NumOperands == 0 && "Operand list not cleared before deletion");
808 NodeType = ISD::DELETED_NODE;
811 //===--------------------------------------------------------------------===//
814 unsigned getOpcode() const { return NodeType; }
815 bool isTargetOpcode() const { return NodeType >= ISD::BUILTIN_OP_END; }
816 unsigned getTargetOpcode() const {
817 assert(isTargetOpcode() && "Not a target opcode!");
818 return NodeType - ISD::BUILTIN_OP_END;
821 size_t use_size() const { return Uses.size(); }
822 bool use_empty() const { return Uses.empty(); }
823 bool hasOneUse() const { return Uses.size() == 1; }
825 /// getNodeId - Return the unique node id.
827 int getNodeId() const { return NodeId; }
829 typedef SmallVector<SDNode*,3>::const_iterator use_iterator;
830 use_iterator use_begin() const { return Uses.begin(); }
831 use_iterator use_end() const { return Uses.end(); }
833 /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
834 /// indicated value. This method ignores uses of other values defined by this
836 bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
838 /// isOnlyUse - Return true if this node is the only use of N.
840 bool isOnlyUse(SDNode *N) const;
842 /// isOperand - Return true if this node is an operand of N.
844 bool isOperand(SDNode *N) const;
846 /// isPredecessor - Return true if this node is a predecessor of N. This node
847 /// is either an operand of N or it can be reached by recursively traversing
849 /// NOTE: this is an expensive method. Use it carefully.
850 bool isPredecessor(SDNode *N) const;
852 /// getNumOperands - Return the number of values used by this operation.
854 unsigned getNumOperands() const { return NumOperands; }
856 /// getConstantOperandVal - Helper method returns the integer value of a
857 /// ConstantSDNode operand.
858 uint64_t getConstantOperandVal(unsigned Num) const;
860 const SDOperand &getOperand(unsigned Num) const {
861 assert(Num < NumOperands && "Invalid child # of SDNode!");
862 return OperandList[Num];
865 typedef const SDOperand* op_iterator;
866 op_iterator op_begin() const { return OperandList; }
867 op_iterator op_end() const { return OperandList+NumOperands; }
870 SDVTList getVTList() const {
871 SDVTList X = { ValueList, NumValues };
875 /// getNumValues - Return the number of values defined/returned by this
878 unsigned getNumValues() const { return NumValues; }
880 /// getValueType - Return the type of a specified result.
882 MVT::ValueType getValueType(unsigned ResNo) const {
883 assert(ResNo < NumValues && "Illegal result number!");
884 return ValueList[ResNo];
887 typedef const MVT::ValueType* value_iterator;
888 value_iterator value_begin() const { return ValueList; }
889 value_iterator value_end() const { return ValueList+NumValues; }
891 /// getOperationName - Return the opcode of this operation for printing.
893 std::string getOperationName(const SelectionDAG *G = 0) const;
894 static const char* getIndexedModeName(ISD::MemIndexedMode AM);
896 void dump(const SelectionDAG *G) const;
898 static bool classof(const SDNode *) { return true; }
900 /// Profile - Gather unique data for the node.
902 void Profile(FoldingSetNodeID &ID);
905 friend class SelectionDAG;
907 /// getValueTypeList - Return a pointer to the specified value type.
909 static MVT::ValueType *getValueTypeList(MVT::ValueType VT);
910 static SDVTList getSDVTList(MVT::ValueType VT) {
911 SDVTList Ret = { getValueTypeList(VT), 1 };
915 SDNode(unsigned Opc, SDVTList VTs, const SDOperand *Ops, unsigned NumOps)
916 : NodeType(Opc), NodeId(-1) {
917 OperandsNeedDelete = true;
918 NumOperands = NumOps;
919 OperandList = NumOps ? new SDOperand[NumOperands] : 0;
921 for (unsigned i = 0; i != NumOps; ++i) {
922 OperandList[i] = Ops[i];
923 Ops[i].Val->Uses.push_back(this);
927 NumValues = VTs.NumVTs;
930 SDNode(unsigned Opc, SDVTList VTs) : NodeType(Opc), NodeId(-1) {
931 OperandsNeedDelete = false; // Operands set with InitOperands.
936 NumValues = VTs.NumVTs;
940 /// InitOperands - Initialize the operands list of this node with the
941 /// specified values, which are part of the node (thus they don't need to be
942 /// copied in or allocated).
943 void InitOperands(SDOperand *Ops, unsigned NumOps) {
944 assert(OperandList == 0 && "Operands already set!");
945 NumOperands = NumOps;
948 for (unsigned i = 0; i != NumOps; ++i)
949 Ops[i].Val->Uses.push_back(this);
952 /// MorphNodeTo - This frees the operands of the current node, resets the
953 /// opcode, types, and operands to the specified value. This should only be
954 /// used by the SelectionDAG class.
955 void MorphNodeTo(unsigned Opc, SDVTList L,
956 const SDOperand *Ops, unsigned NumOps);
958 void addUser(SDNode *User) {
959 Uses.push_back(User);
961 void removeUser(SDNode *User) {
962 // Remove this user from the operand's use list.
963 for (unsigned i = Uses.size(); ; --i) {
964 assert(i != 0 && "Didn't find user!");
965 if (Uses[i-1] == User) {
966 Uses[i-1] = Uses.back();
973 void setNodeId(int Id) {
979 // Define inline functions from the SDOperand class.
981 inline unsigned SDOperand::getOpcode() const {
982 return Val->getOpcode();
984 inline MVT::ValueType SDOperand::getValueType() const {
985 return Val->getValueType(ResNo);
987 inline unsigned SDOperand::getNumOperands() const {
988 return Val->getNumOperands();
990 inline const SDOperand &SDOperand::getOperand(unsigned i) const {
991 return Val->getOperand(i);
993 inline uint64_t SDOperand::getConstantOperandVal(unsigned i) const {
994 return Val->getConstantOperandVal(i);
996 inline bool SDOperand::isTargetOpcode() const {
997 return Val->isTargetOpcode();
999 inline unsigned SDOperand::getTargetOpcode() const {
1000 return Val->getTargetOpcode();
1002 inline bool SDOperand::hasOneUse() const {
1003 return Val->hasNUsesOfValue(1, ResNo);
1006 /// UnarySDNode - This class is used for single-operand SDNodes. This is solely
1007 /// to allow co-allocation of node operands with the node itself.
1008 class UnarySDNode : public SDNode {
1009 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1012 UnarySDNode(unsigned Opc, SDVTList VTs, SDOperand X)
1013 : SDNode(Opc, VTs), Op(X) {
1014 InitOperands(&Op, 1);
1018 /// BinarySDNode - This class is used for two-operand SDNodes. This is solely
1019 /// to allow co-allocation of node operands with the node itself.
1020 class BinarySDNode : public SDNode {
1021 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1024 BinarySDNode(unsigned Opc, SDVTList VTs, SDOperand X, SDOperand Y)
1025 : SDNode(Opc, VTs) {
1028 InitOperands(Ops, 2);
1032 /// TernarySDNode - This class is used for three-operand SDNodes. This is solely
1033 /// to allow co-allocation of node operands with the node itself.
1034 class TernarySDNode : public SDNode {
1035 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1038 TernarySDNode(unsigned Opc, SDVTList VTs, SDOperand X, SDOperand Y,
1040 : SDNode(Opc, VTs) {
1044 InitOperands(Ops, 3);
1049 /// HandleSDNode - This class is used to form a handle around another node that
1050 /// is persistant and is updated across invocations of replaceAllUsesWith on its
1051 /// operand. This node should be directly created by end-users and not added to
1052 /// the AllNodes list.
1053 class HandleSDNode : public SDNode {
1054 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1057 explicit HandleSDNode(SDOperand X)
1058 : SDNode(ISD::HANDLENODE, getSDVTList(MVT::Other)), Op(X) {
1059 InitOperands(&Op, 1);
1062 SDOperand getValue() const { return Op; }
1065 class StringSDNode : public SDNode {
1067 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1069 friend class SelectionDAG;
1070 explicit StringSDNode(const std::string &val)
1071 : SDNode(ISD::STRING, getSDVTList(MVT::Other)), Value(val) {
1074 const std::string &getValue() const { return Value; }
1075 static bool classof(const StringSDNode *) { return true; }
1076 static bool classof(const SDNode *N) {
1077 return N->getOpcode() == ISD::STRING;
1081 class ConstantSDNode : public SDNode {
1083 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1085 friend class SelectionDAG;
1086 ConstantSDNode(bool isTarget, uint64_t val, MVT::ValueType VT)
1087 : SDNode(isTarget ? ISD::TargetConstant : ISD::Constant, getSDVTList(VT)),
1092 uint64_t getValue() const { return Value; }
1094 int64_t getSignExtended() const {
1095 unsigned Bits = MVT::getSizeInBits(getValueType(0));
1096 return ((int64_t)Value << (64-Bits)) >> (64-Bits);
1099 bool isNullValue() const { return Value == 0; }
1100 bool isAllOnesValue() const {
1101 return Value == MVT::getIntVTBitMask(getValueType(0));
1104 static bool classof(const ConstantSDNode *) { return true; }
1105 static bool classof(const SDNode *N) {
1106 return N->getOpcode() == ISD::Constant ||
1107 N->getOpcode() == ISD::TargetConstant;
1111 class ConstantFPSDNode : public SDNode {
1113 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1115 friend class SelectionDAG;
1116 ConstantFPSDNode(bool isTarget, double val, MVT::ValueType VT)
1117 : SDNode(isTarget ? ISD::TargetConstantFP : ISD::ConstantFP,
1118 getSDVTList(VT)), Value(val) {
1122 double getValue() const { return Value; }
1124 /// isExactlyValue - We don't rely on operator== working on double values, as
1125 /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
1126 /// As such, this method can be used to do an exact bit-for-bit comparison of
1127 /// two floating point values.
1128 bool isExactlyValue(double V) const;
1130 static bool classof(const ConstantFPSDNode *) { return true; }
1131 static bool classof(const SDNode *N) {
1132 return N->getOpcode() == ISD::ConstantFP ||
1133 N->getOpcode() == ISD::TargetConstantFP;
1137 class GlobalAddressSDNode : public SDNode {
1138 GlobalValue *TheGlobal;
1140 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1142 friend class SelectionDAG;
1143 GlobalAddressSDNode(bool isTarget, const GlobalValue *GA, MVT::ValueType VT,
1147 GlobalValue *getGlobal() const { return TheGlobal; }
1148 int getOffset() const { return Offset; }
1150 static bool classof(const GlobalAddressSDNode *) { return true; }
1151 static bool classof(const SDNode *N) {
1152 return N->getOpcode() == ISD::GlobalAddress ||
1153 N->getOpcode() == ISD::TargetGlobalAddress ||
1154 N->getOpcode() == ISD::GlobalTLSAddress ||
1155 N->getOpcode() == ISD::TargetGlobalTLSAddress;
1159 class FrameIndexSDNode : public SDNode {
1161 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1163 friend class SelectionDAG;
1164 FrameIndexSDNode(int fi, MVT::ValueType VT, bool isTarg)
1165 : SDNode(isTarg ? ISD::TargetFrameIndex : ISD::FrameIndex, getSDVTList(VT)),
1170 int getIndex() const { return FI; }
1172 static bool classof(const FrameIndexSDNode *) { return true; }
1173 static bool classof(const SDNode *N) {
1174 return N->getOpcode() == ISD::FrameIndex ||
1175 N->getOpcode() == ISD::TargetFrameIndex;
1179 class JumpTableSDNode : public SDNode {
1181 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1183 friend class SelectionDAG;
1184 JumpTableSDNode(int jti, MVT::ValueType VT, bool isTarg)
1185 : SDNode(isTarg ? ISD::TargetJumpTable : ISD::JumpTable, getSDVTList(VT)),
1190 int getIndex() const { return JTI; }
1192 static bool classof(const JumpTableSDNode *) { return true; }
1193 static bool classof(const SDNode *N) {
1194 return N->getOpcode() == ISD::JumpTable ||
1195 N->getOpcode() == ISD::TargetJumpTable;
1199 class ConstantPoolSDNode : public SDNode {
1202 MachineConstantPoolValue *MachineCPVal;
1204 int Offset; // It's a MachineConstantPoolValue if top bit is set.
1206 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1208 friend class SelectionDAG;
1209 ConstantPoolSDNode(bool isTarget, Constant *c, MVT::ValueType VT,
1211 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1212 getSDVTList(VT)), Offset(o), Alignment(0) {
1213 assert((int)Offset >= 0 && "Offset is too large");
1216 ConstantPoolSDNode(bool isTarget, Constant *c, MVT::ValueType VT, int o,
1218 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1219 getSDVTList(VT)), Offset(o), Alignment(Align) {
1220 assert((int)Offset >= 0 && "Offset is too large");
1223 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v,
1224 MVT::ValueType VT, int o=0)
1225 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1226 getSDVTList(VT)), Offset(o), Alignment(0) {
1227 assert((int)Offset >= 0 && "Offset is too large");
1228 Val.MachineCPVal = v;
1229 Offset |= 1 << (sizeof(unsigned)*8-1);
1231 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v,
1232 MVT::ValueType VT, int o, unsigned Align)
1233 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1234 getSDVTList(VT)), Offset(o), Alignment(Align) {
1235 assert((int)Offset >= 0 && "Offset is too large");
1236 Val.MachineCPVal = v;
1237 Offset |= 1 << (sizeof(unsigned)*8-1);
1241 bool isMachineConstantPoolEntry() const {
1242 return (int)Offset < 0;
1245 Constant *getConstVal() const {
1246 assert(!isMachineConstantPoolEntry() && "Wrong constantpool type");
1247 return Val.ConstVal;
1250 MachineConstantPoolValue *getMachineCPVal() const {
1251 assert(isMachineConstantPoolEntry() && "Wrong constantpool type");
1252 return Val.MachineCPVal;
1255 int getOffset() const {
1256 return Offset & ~(1 << (sizeof(unsigned)*8-1));
1259 // Return the alignment of this constant pool object, which is either 0 (for
1260 // default alignment) or log2 of the desired value.
1261 unsigned getAlignment() const { return Alignment; }
1263 const Type *getType() const;
1265 static bool classof(const ConstantPoolSDNode *) { return true; }
1266 static bool classof(const SDNode *N) {
1267 return N->getOpcode() == ISD::ConstantPool ||
1268 N->getOpcode() == ISD::TargetConstantPool;
1272 class BasicBlockSDNode : public SDNode {
1273 MachineBasicBlock *MBB;
1274 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1276 friend class SelectionDAG;
1277 explicit BasicBlockSDNode(MachineBasicBlock *mbb)
1278 : SDNode(ISD::BasicBlock, getSDVTList(MVT::Other)), MBB(mbb) {
1282 MachineBasicBlock *getBasicBlock() const { return MBB; }
1284 static bool classof(const BasicBlockSDNode *) { return true; }
1285 static bool classof(const SDNode *N) {
1286 return N->getOpcode() == ISD::BasicBlock;
1290 class SrcValueSDNode : public SDNode {
1293 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1295 friend class SelectionDAG;
1296 SrcValueSDNode(const Value* v, int o)
1297 : SDNode(ISD::SRCVALUE, getSDVTList(MVT::Other)), V(v), offset(o) {
1301 const Value *getValue() const { return V; }
1302 int getOffset() const { return offset; }
1304 static bool classof(const SrcValueSDNode *) { return true; }
1305 static bool classof(const SDNode *N) {
1306 return N->getOpcode() == ISD::SRCVALUE;
1311 class RegisterSDNode : public SDNode {
1313 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1315 friend class SelectionDAG;
1316 RegisterSDNode(unsigned reg, MVT::ValueType VT)
1317 : SDNode(ISD::Register, getSDVTList(VT)), Reg(reg) {
1321 unsigned getReg() const { return Reg; }
1323 static bool classof(const RegisterSDNode *) { return true; }
1324 static bool classof(const SDNode *N) {
1325 return N->getOpcode() == ISD::Register;
1329 class ExternalSymbolSDNode : public SDNode {
1331 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1333 friend class SelectionDAG;
1334 ExternalSymbolSDNode(bool isTarget, const char *Sym, MVT::ValueType VT)
1335 : SDNode(isTarget ? ISD::TargetExternalSymbol : ISD::ExternalSymbol,
1336 getSDVTList(VT)), Symbol(Sym) {
1340 const char *getSymbol() const { return Symbol; }
1342 static bool classof(const ExternalSymbolSDNode *) { return true; }
1343 static bool classof(const SDNode *N) {
1344 return N->getOpcode() == ISD::ExternalSymbol ||
1345 N->getOpcode() == ISD::TargetExternalSymbol;
1349 class CondCodeSDNode : public SDNode {
1350 ISD::CondCode Condition;
1351 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1353 friend class SelectionDAG;
1354 explicit CondCodeSDNode(ISD::CondCode Cond)
1355 : SDNode(ISD::CONDCODE, getSDVTList(MVT::Other)), Condition(Cond) {
1359 ISD::CondCode get() const { return Condition; }
1361 static bool classof(const CondCodeSDNode *) { return true; }
1362 static bool classof(const SDNode *N) {
1363 return N->getOpcode() == ISD::CONDCODE;
1367 /// VTSDNode - This class is used to represent MVT::ValueType's, which are used
1368 /// to parameterize some operations.
1369 class VTSDNode : public SDNode {
1370 MVT::ValueType ValueType;
1371 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1373 friend class SelectionDAG;
1374 explicit VTSDNode(MVT::ValueType VT)
1375 : SDNode(ISD::VALUETYPE, getSDVTList(MVT::Other)), ValueType(VT) {
1379 MVT::ValueType getVT() const { return ValueType; }
1381 static bool classof(const VTSDNode *) { return true; }
1382 static bool classof(const SDNode *N) {
1383 return N->getOpcode() == ISD::VALUETYPE;
1387 /// LoadSDNode - This class is used to represent ISD::LOAD nodes.
1389 class LoadSDNode : public SDNode {
1390 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1393 // AddrMode - unindexed, pre-indexed, post-indexed.
1394 ISD::MemIndexedMode AddrMode;
1396 // ExtType - non-ext, anyext, sext, zext.
1397 ISD::LoadExtType ExtType;
1399 // LoadedVT - VT of loaded value before extension.
1400 MVT::ValueType LoadedVT;
1402 // SrcValue - Memory location for alias analysis.
1403 const Value *SrcValue;
1405 // SVOffset - Memory location offset.
1408 // Alignment - Alignment of memory location in bytes.
1411 // IsVolatile - True if the load is volatile.
1414 friend class SelectionDAG;
1415 LoadSDNode(SDOperand *ChainPtrOff, SDVTList VTs,
1416 ISD::MemIndexedMode AM, ISD::LoadExtType ETy, MVT::ValueType LVT,
1417 const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
1418 : SDNode(ISD::LOAD, VTs),
1419 AddrMode(AM), ExtType(ETy), LoadedVT(LVT), SrcValue(SV), SVOffset(O),
1420 Alignment(Align), IsVolatile(Vol) {
1421 Ops[0] = ChainPtrOff[0]; // Chain
1422 Ops[1] = ChainPtrOff[1]; // Ptr
1423 Ops[2] = ChainPtrOff[2]; // Off
1424 InitOperands(Ops, 3);
1425 assert(Align != 0 && "Loads should have non-zero aligment");
1426 assert((getOffset().getOpcode() == ISD::UNDEF ||
1427 AddrMode != ISD::UNINDEXED) &&
1428 "Only indexed load has a non-undef offset operand");
1432 const SDOperand getChain() const { return getOperand(0); }
1433 const SDOperand getBasePtr() const { return getOperand(1); }
1434 const SDOperand getOffset() const { return getOperand(2); }
1435 ISD::MemIndexedMode getAddressingMode() const { return AddrMode; }
1436 ISD::LoadExtType getExtensionType() const { return ExtType; }
1437 MVT::ValueType getLoadedVT() const { return LoadedVT; }
1438 const Value *getSrcValue() const { return SrcValue; }
1439 int getSrcValueOffset() const { return SVOffset; }
1440 unsigned getAlignment() const { return Alignment; }
1441 bool isVolatile() const { return IsVolatile; }
1443 static bool classof(const LoadSDNode *) { return true; }
1444 static bool classof(const SDNode *N) {
1445 return N->getOpcode() == ISD::LOAD;
1449 /// StoreSDNode - This class is used to represent ISD::STORE nodes.
1451 class StoreSDNode : public SDNode {
1452 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1455 // AddrMode - unindexed, pre-indexed, post-indexed.
1456 ISD::MemIndexedMode AddrMode;
1458 // IsTruncStore - True is the op does a truncation before store.
1461 // StoredVT - VT of the value after truncation.
1462 MVT::ValueType StoredVT;
1464 // SrcValue - Memory location for alias analysis.
1465 const Value *SrcValue;
1467 // SVOffset - Memory location offset.
1470 // Alignment - Alignment of memory location in bytes.
1473 // IsVolatile - True if the store is volatile.
1476 friend class SelectionDAG;
1477 StoreSDNode(SDOperand *ChainValuePtrOff, SDVTList VTs,
1478 ISD::MemIndexedMode AM, bool isTrunc, MVT::ValueType SVT,
1479 const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
1480 : SDNode(ISD::STORE, VTs),
1481 AddrMode(AM), IsTruncStore(isTrunc), StoredVT(SVT), SrcValue(SV),
1482 SVOffset(O), Alignment(Align), IsVolatile(Vol) {
1483 Ops[0] = ChainValuePtrOff[0]; // Chain
1484 Ops[1] = ChainValuePtrOff[1]; // Value
1485 Ops[2] = ChainValuePtrOff[2]; // Ptr
1486 Ops[3] = ChainValuePtrOff[3]; // Off
1487 InitOperands(Ops, 4);
1488 assert(Align != 0 && "Stores should have non-zero aligment");
1489 assert((getOffset().getOpcode() == ISD::UNDEF ||
1490 AddrMode != ISD::UNINDEXED) &&
1491 "Only indexed store has a non-undef offset operand");
1495 const SDOperand getChain() const { return getOperand(0); }
1496 const SDOperand getValue() const { return getOperand(1); }
1497 const SDOperand getBasePtr() const { return getOperand(2); }
1498 const SDOperand getOffset() const { return getOperand(3); }
1499 ISD::MemIndexedMode getAddressingMode() const { return AddrMode; }
1500 bool isTruncatingStore() const { return IsTruncStore; }
1501 MVT::ValueType getStoredVT() const { return StoredVT; }
1502 const Value *getSrcValue() const { return SrcValue; }
1503 int getSrcValueOffset() const { return SVOffset; }
1504 unsigned getAlignment() const { return Alignment; }
1505 bool isVolatile() const { return IsVolatile; }
1507 static bool classof(const StoreSDNode *) { return true; }
1508 static bool classof(const SDNode *N) {
1509 return N->getOpcode() == ISD::STORE;
1514 class SDNodeIterator : public forward_iterator<SDNode, ptrdiff_t> {
1518 SDNodeIterator(SDNode *N, unsigned Op) : Node(N), Operand(Op) {}
1520 bool operator==(const SDNodeIterator& x) const {
1521 return Operand == x.Operand;
1523 bool operator!=(const SDNodeIterator& x) const { return !operator==(x); }
1525 const SDNodeIterator &operator=(const SDNodeIterator &I) {
1526 assert(I.Node == Node && "Cannot assign iterators to two different nodes!");
1527 Operand = I.Operand;
1531 pointer operator*() const {
1532 return Node->getOperand(Operand).Val;
1534 pointer operator->() const { return operator*(); }
1536 SDNodeIterator& operator++() { // Preincrement
1540 SDNodeIterator operator++(int) { // Postincrement
1541 SDNodeIterator tmp = *this; ++*this; return tmp;
1544 static SDNodeIterator begin(SDNode *N) { return SDNodeIterator(N, 0); }
1545 static SDNodeIterator end (SDNode *N) {
1546 return SDNodeIterator(N, N->getNumOperands());
1549 unsigned getOperand() const { return Operand; }
1550 const SDNode *getNode() const { return Node; }
1553 template <> struct GraphTraits<SDNode*> {
1554 typedef SDNode NodeType;
1555 typedef SDNodeIterator ChildIteratorType;
1556 static inline NodeType *getEntryNode(SDNode *N) { return N; }
1557 static inline ChildIteratorType child_begin(NodeType *N) {
1558 return SDNodeIterator::begin(N);
1560 static inline ChildIteratorType child_end(NodeType *N) {
1561 return SDNodeIterator::end(N);
1566 struct ilist_traits<SDNode> {
1567 static SDNode *getPrev(const SDNode *N) { return N->Prev; }
1568 static SDNode *getNext(const SDNode *N) { return N->Next; }
1570 static void setPrev(SDNode *N, SDNode *Prev) { N->Prev = Prev; }
1571 static void setNext(SDNode *N, SDNode *Next) { N->Next = Next; }
1573 static SDNode *createSentinel() {
1574 return new SDNode(ISD::EntryToken, SDNode::getSDVTList(MVT::Other));
1576 static void destroySentinel(SDNode *N) { delete N; }
1577 //static SDNode *createNode(const SDNode &V) { return new SDNode(V); }
1580 void addNodeToList(SDNode *NTy) {}
1581 void removeNodeFromList(SDNode *NTy) {}
1582 void transferNodesFromList(iplist<SDNode, ilist_traits> &L2,
1583 const ilist_iterator<SDNode> &X,
1584 const ilist_iterator<SDNode> &Y) {}
1588 /// isNON_EXTLoad - Returns true if the specified node is a non-extending
1590 inline bool isNON_EXTLoad(const SDNode *N) {
1591 return N->getOpcode() == ISD::LOAD &&
1592 cast<LoadSDNode>(N)->getExtensionType() == ISD::NON_EXTLOAD;
1595 /// isEXTLoad - Returns true if the specified node is a EXTLOAD.
1597 inline bool isEXTLoad(const SDNode *N) {
1598 return N->getOpcode() == ISD::LOAD &&
1599 cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD;
1602 /// isSEXTLoad - Returns true if the specified node is a SEXTLOAD.
1604 inline bool isSEXTLoad(const SDNode *N) {
1605 return N->getOpcode() == ISD::LOAD &&
1606 cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD;
1609 /// isZEXTLoad - Returns true if the specified node is a ZEXTLOAD.
1611 inline bool isZEXTLoad(const SDNode *N) {
1612 return N->getOpcode() == ISD::LOAD &&
1613 cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD;
1616 /// isUNINDEXEDLoad - Returns true if the specified node is a unindexed load.
1618 inline bool isUNINDEXEDLoad(const SDNode *N) {
1619 return N->getOpcode() == ISD::LOAD &&
1620 cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
1623 /// isNON_TRUNCStore - Returns true if the specified node is a non-truncating
1625 inline bool isNON_TRUNCStore(const SDNode *N) {
1626 return N->getOpcode() == ISD::STORE &&
1627 !cast<StoreSDNode>(N)->isTruncatingStore();
1630 /// isTRUNCStore - Returns true if the specified node is a truncating
1632 inline bool isTRUNCStore(const SDNode *N) {
1633 return N->getOpcode() == ISD::STORE &&
1634 cast<StoreSDNode>(N)->isTruncatingStore();
1639 } // end llvm namespace