1 //===-- llvm/CodeGen/SelectionDAGNodes.h - SelectionDAG Nodes ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // 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.h"
26 #include "llvm/ADT/APFloat.h"
27 #include "llvm/ADT/APInt.h"
28 #include "llvm/ADT/ilist_node.h"
29 #include "llvm/ADT/STLExtras.h"
30 #include "llvm/CodeGen/ValueTypes.h"
31 #include "llvm/CodeGen/MachineMemOperand.h"
32 #include "llvm/Support/Allocator.h"
33 #include "llvm/Support/RecyclingAllocator.h"
34 #include "llvm/Support/DataTypes.h"
41 class MachineBasicBlock;
42 class MachineConstantPoolValue;
44 class CompileUnitDesc;
45 template <typename T> struct DenseMapInfo;
46 template <typename T> struct simplify_type;
47 template <typename T> class ilist_traits;
49 /// SDVTList - This represents a list of ValueType's that has been intern'd by
50 /// a SelectionDAG. Instances of this simple value class are returned by
51 /// SelectionDAG::getVTList(...).
55 unsigned short NumVTs;
58 /// ISD namespace - This namespace contains an enum which represents all of the
59 /// SelectionDAG node types and value types.
61 /// If you add new elements here you should increase OpActionsCapacity in
62 /// TargetLowering.h by the number of new elements.
65 //===--------------------------------------------------------------------===//
66 /// ISD::NodeType enum - This enum defines all of the operators valid in a
70 // DELETED_NODE - This is an illegal flag value that is used to catch
71 // errors. This opcode is not a legal opcode for any node.
74 // EntryToken - This is the marker used to indicate the start of the region.
77 // Token factor - This node takes multiple tokens as input and produces a
78 // single token result. This is used to represent the fact that the operand
79 // operators are independent of each other.
82 // AssertSext, AssertZext - These nodes record if a register contains a
83 // value that has already been zero or sign extended from a narrower type.
84 // These nodes take two operands. The first is the node that has already
85 // been extended, and the second is a value type node indicating the width
87 AssertSext, AssertZext,
89 // Various leaf nodes.
90 BasicBlock, VALUETYPE, ARG_FLAGS, CONDCODE, Register,
92 GlobalAddress, GlobalTLSAddress, FrameIndex,
93 JumpTable, ConstantPool, ExternalSymbol,
95 // The address of the GOT
98 // FRAMEADDR, RETURNADDR - These nodes represent llvm.frameaddress and
99 // llvm.returnaddress on the DAG. These nodes take one operand, the index
100 // of the frame or return address to return. An index of zero corresponds
101 // to the current function's frame or return address, an index of one to the
102 // parent's frame or return address, and so on.
103 FRAMEADDR, RETURNADDR,
105 // FRAME_TO_ARGS_OFFSET - This node represents offset from frame pointer to
106 // first (possible) on-stack argument. This is needed for correct stack
107 // adjustment during unwind.
108 FRAME_TO_ARGS_OFFSET,
110 // RESULT, OUTCHAIN = EXCEPTIONADDR(INCHAIN) - This node represents the
111 // address of the exception block on entry to an landing pad block.
114 // RESULT, OUTCHAIN = EHSELECTION(INCHAIN, EXCEPTION) - This node represents
115 // the selection index of the exception thrown.
118 // OUTCHAIN = EH_RETURN(INCHAIN, OFFSET, HANDLER) - This node represents
119 // 'eh_return' gcc dwarf builtin, which is used to return from
120 // exception. The general meaning is: adjust stack by OFFSET and pass
121 // execution to HANDLER. Many platform-related details also :)
124 // TargetConstant* - Like Constant*, but the DAG does not do any folding or
125 // simplification of the constant.
129 // TargetGlobalAddress - Like GlobalAddress, but the DAG does no folding or
130 // anything else with this node, and this is valid in the target-specific
131 // dag, turning into a GlobalAddress operand.
133 TargetGlobalTLSAddress,
137 TargetExternalSymbol,
139 /// RESULT = INTRINSIC_WO_CHAIN(INTRINSICID, arg1, arg2, ...)
140 /// This node represents a target intrinsic function with no side effects.
141 /// The first operand is the ID number of the intrinsic from the
142 /// llvm::Intrinsic namespace. The operands to the intrinsic follow. The
143 /// node has returns the result of the intrinsic.
146 /// RESULT,OUTCHAIN = INTRINSIC_W_CHAIN(INCHAIN, INTRINSICID, arg1, ...)
147 /// This node represents a target intrinsic function with side effects that
148 /// returns a result. The first operand is a chain pointer. The second is
149 /// the ID number of the intrinsic from the llvm::Intrinsic namespace. The
150 /// operands to the intrinsic follow. The node has two results, the result
151 /// of the intrinsic and an output chain.
154 /// OUTCHAIN = INTRINSIC_VOID(INCHAIN, INTRINSICID, arg1, arg2, ...)
155 /// This node represents a target intrinsic function with side effects that
156 /// does not return a result. The first operand is a chain pointer. The
157 /// second is the ID number of the intrinsic from the llvm::Intrinsic
158 /// namespace. The operands to the intrinsic follow.
161 // CopyToReg - This node has three operands: a chain, a register number to
162 // set to this value, and a value.
165 // CopyFromReg - This node indicates that the input value is a virtual or
166 // physical register that is defined outside of the scope of this
167 // SelectionDAG. The register is available from the RegisterSDNode object.
170 // UNDEF - An undefined node
173 /// FORMAL_ARGUMENTS(CHAIN, CC#, ISVARARG, FLAG0, ..., FLAGn) - This node
174 /// represents the formal arguments for a function. CC# is a Constant value
175 /// indicating the calling convention of the function, and ISVARARG is a
176 /// flag that indicates whether the function is varargs or not. This node
177 /// has one result value for each incoming argument, plus one for the output
178 /// chain. It must be custom legalized. See description of CALL node for
179 /// FLAG argument contents explanation.
183 /// RV1, RV2...RVn, CHAIN = CALL(CHAIN, CC#, ISVARARG, ISTAILCALL, CALLEE,
184 /// ARG0, FLAG0, ARG1, FLAG1, ... ARGn, FLAGn)
185 /// This node represents a fully general function call, before the legalizer
186 /// runs. This has one result value for each argument / flag pair, plus
187 /// a chain result. It must be custom legalized. Flag argument indicates
188 /// misc. argument attributes. Currently:
190 /// Bit 1 - 'inreg' attribute
191 /// Bit 2 - 'sret' attribute
192 /// Bit 4 - 'byval' attribute
193 /// Bit 5 - 'nest' attribute
194 /// Bit 6-9 - alignment of byval structures
195 /// Bit 10-26 - size of byval structures
196 /// Bits 31:27 - argument ABI alignment in the first argument piece and
197 /// alignment '1' in other argument pieces.
200 // EXTRACT_ELEMENT - This is used to get the lower or upper (determined by
201 // a Constant, which is required to be operand #1) half of the integer or
202 // float value specified as operand #0. This is only for use before
203 // legalization, for values that will be broken into multiple registers.
206 // BUILD_PAIR - This is the opposite of EXTRACT_ELEMENT in some ways. Given
207 // two values of the same integer value type, this produces a value twice as
208 // big. Like EXTRACT_ELEMENT, this can only be used before legalization.
211 // MERGE_VALUES - This node takes multiple discrete operands and returns
212 // them all as its individual results. This nodes has exactly the same
213 // number of inputs and outputs, and is only valid before legalization.
214 // This node is useful for some pieces of the code generator that want to
215 // think about a single node with multiple results, not multiple nodes.
218 // Simple integer binary arithmetic operators.
219 ADD, SUB, MUL, SDIV, UDIV, SREM, UREM,
221 // SMUL_LOHI/UMUL_LOHI - Multiply two integers of type iN, producing
222 // a signed/unsigned value of type i[2*N], and return the full value as
223 // two results, each of type iN.
224 SMUL_LOHI, UMUL_LOHI,
226 // SDIVREM/UDIVREM - Divide two integers and produce both a quotient and
230 // CARRY_FALSE - This node is used when folding other nodes,
231 // like ADDC/SUBC, which indicate the carry result is always false.
234 // Carry-setting nodes for multiple precision addition and subtraction.
235 // These nodes take two operands of the same value type, and produce two
236 // results. The first result is the normal add or sub result, the second
237 // result is the carry flag result.
240 // Carry-using nodes for multiple precision addition and subtraction. These
241 // nodes take three operands: The first two are the normal lhs and rhs to
242 // the add or sub, and the third is the input carry flag. These nodes
243 // produce two results; the normal result of the add or sub, and the output
244 // carry flag. These nodes both read and write a carry flag to allow them
245 // to them to be chained together for add and sub of arbitrarily large
249 // Simple binary floating point operators.
250 FADD, FSUB, FMUL, FDIV, FREM,
252 // FCOPYSIGN(X, Y) - Return the value of X with the sign of Y. NOTE: This
253 // DAG node does not require that X and Y have the same type, just that they
254 // are both floating point. X and the result must have the same type.
255 // FCOPYSIGN(f32, f64) is allowed.
258 // INT = FGETSIGN(FP) - Return the sign bit of the specified floating point
259 // value as an integer 0/1 value.
262 /// BUILD_VECTOR(ELT0, ELT1, ELT2, ELT3,...) - Return a vector
263 /// with the specified, possibly variable, elements. The number of elements
264 /// is required to be a power of two.
267 /// INSERT_VECTOR_ELT(VECTOR, VAL, IDX) - Returns VECTOR with the element
268 /// at IDX replaced with VAL. If the type of VAL is larger than the vector
269 /// element type then VAL is truncated before replacement.
272 /// EXTRACT_VECTOR_ELT(VECTOR, IDX) - Returns a single element from VECTOR
273 /// identified by the (potentially variable) element number IDX.
276 /// CONCAT_VECTORS(VECTOR0, VECTOR1, ...) - Given a number of values of
277 /// vector type with the same length and element type, this produces a
278 /// concatenated vector result value, with length equal to the sum of the
279 /// lengths of the input vectors.
282 /// EXTRACT_SUBVECTOR(VECTOR, IDX) - Returns a subvector from VECTOR (an
283 /// vector value) starting with the (potentially variable) element number
284 /// IDX, which must be a multiple of the result vector length.
287 /// VECTOR_SHUFFLE(VEC1, VEC2, SHUFFLEVEC) - Returns a vector, of the same
288 /// type as VEC1/VEC2. SHUFFLEVEC is a BUILD_VECTOR of constant int values
289 /// (maybe of an illegal datatype) or undef that indicate which value each
290 /// result element will get. The elements of VEC1/VEC2 are enumerated in
291 /// order. This is quite similar to the Altivec 'vperm' instruction, except
292 /// that the indices must be constants and are in terms of the element size
293 /// of VEC1/VEC2, not in terms of bytes.
296 /// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a
297 /// scalar value into element 0 of the resultant vector type. The top
298 /// elements 1 to N-1 of the N-element vector are undefined.
301 // EXTRACT_SUBREG - This node is used to extract a sub-register value.
302 // This node takes a superreg and a constant sub-register index as operands.
303 // Note sub-register indices must be increasing. That is, if the
304 // sub-register index of a 8-bit sub-register is N, then the index for a
305 // 16-bit sub-register must be at least N+1.
308 // INSERT_SUBREG - This node is used to insert a sub-register value.
309 // This node takes a superreg, a subreg value, and a constant sub-register
310 // index as operands.
313 // MULHU/MULHS - Multiply high - Multiply two integers of type iN, producing
314 // an unsigned/signed value of type i[2*N], then return the top part.
317 // Bitwise operators - logical and, logical or, logical xor, shift left,
318 // shift right algebraic (shift in sign bits), shift right logical (shift in
319 // zeroes), rotate left, rotate right, and byteswap.
320 AND, OR, XOR, SHL, SRA, SRL, ROTL, ROTR, BSWAP,
322 // Counting operators
325 // Select(COND, TRUEVAL, FALSEVAL)
328 // Select with condition operator - This selects between a true value and
329 // a false value (ops #2 and #3) based on the boolean result of comparing
330 // the lhs and rhs (ops #0 and #1) of a conditional expression with the
331 // condition code in op #4, a CondCodeSDNode.
334 // SetCC operator - This evaluates to a boolean (i1) true value if the
335 // condition is true. The operands to this are the left and right operands
336 // to compare (ops #0, and #1) and the condition code to compare them with
337 // (op #2) as a CondCodeSDNode.
340 // Vector SetCC operator - This evaluates to a vector of integer elements
341 // with the high bit in each element set to true if the comparison is true
342 // and false if the comparison is false. All other bits in each element
343 // are undefined. The operands to this are the left and right operands
344 // to compare (ops #0, and #1) and the condition code to compare them with
345 // (op #2) as a CondCodeSDNode.
348 // SHL_PARTS/SRA_PARTS/SRL_PARTS - These operators are used for expanded
349 // integer shift operations, just like ADD/SUB_PARTS. The operation
351 // [Lo,Hi] = op [LoLHS,HiLHS], Amt
352 SHL_PARTS, SRA_PARTS, SRL_PARTS,
354 // Conversion operators. These are all single input single output
355 // operations. For all of these, the result type must be strictly
356 // wider or narrower (depending on the operation) than the source
359 // SIGN_EXTEND - Used for integer types, replicating the sign bit
363 // ZERO_EXTEND - Used for integer types, zeroing the new bits.
366 // ANY_EXTEND - Used for integer types. The high bits are undefined.
369 // TRUNCATE - Completely drop the high bits.
372 // [SU]INT_TO_FP - These operators convert integers (whose interpreted sign
373 // depends on the first letter) to floating point.
377 // SIGN_EXTEND_INREG - This operator atomically performs a SHL/SRA pair to
378 // sign extend a small value in a large integer register (e.g. sign
379 // extending the low 8 bits of a 32-bit register to fill the top 24 bits
380 // with the 7th bit). The size of the smaller type is indicated by the 1th
381 // operand, a ValueType node.
384 /// FP_TO_[US]INT - Convert a floating point value to a signed or unsigned
389 /// X = FP_ROUND(Y, TRUNC) - Rounding 'Y' from a larger floating point type
390 /// down to the precision of the destination VT. TRUNC is a flag, which is
391 /// always an integer that is zero or one. If TRUNC is 0, this is a
392 /// normal rounding, if it is 1, this FP_ROUND is known to not change the
395 /// The TRUNC = 1 case is used in cases where we know that the value will
396 /// not be modified by the node, because Y is not using any of the extra
397 /// precision of source type. This allows certain transformations like
398 /// FP_EXTEND(FP_ROUND(X,1)) -> X which are not safe for
399 /// FP_EXTEND(FP_ROUND(X,0)) because the extra bits aren't removed.
402 // FLT_ROUNDS_ - Returns current rounding mode:
405 // 1 Round to nearest
410 /// X = FP_ROUND_INREG(Y, VT) - This operator takes an FP register, and
411 /// rounds it to a floating point value. It then promotes it and returns it
412 /// in a register of the same size. This operation effectively just
413 /// discards excess precision. The type to round down to is specified by
414 /// the VT operand, a VTSDNode.
417 /// X = FP_EXTEND(Y) - Extend a smaller FP type into a larger FP type.
420 // BIT_CONVERT - Theis operator converts between integer and FP values, as
421 // if one was stored to memory as integer and the other was loaded from the
422 // same address (or equivalently for vector format conversions, etc). The
423 // source and result are required to have the same bit size (e.g.
424 // f32 <-> i32). This can also be used for int-to-int or fp-to-fp
425 // conversions, but that is a noop, deleted by getNode().
428 // FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI, FPOW,
429 // FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR - Perform various unary floating
430 // point operations. These are inspired by libm.
431 FNEG, FABS, FSQRT, FSIN, FCOS, FPOWI, FPOW,
432 FCEIL, FTRUNC, FRINT, FNEARBYINT, FFLOOR,
434 // LOAD and STORE have token chains as their first operand, then the same
435 // operands as an LLVM load/store instruction, then an offset node that
436 // is added / subtracted from the base pointer to form the address (for
437 // indexed memory ops).
440 // DYNAMIC_STACKALLOC - Allocate some number of bytes on the stack aligned
441 // to a specified boundary. This node always has two return values: a new
442 // stack pointer value and a chain. The first operand is the token chain,
443 // the second is the number of bytes to allocate, and the third is the
444 // alignment boundary. The size is guaranteed to be a multiple of the stack
445 // alignment, and the alignment is guaranteed to be bigger than the stack
446 // alignment (if required) or 0 to get standard stack alignment.
449 // Control flow instructions. These all have token chains.
451 // BR - Unconditional branch. The first operand is the chain
452 // operand, the second is the MBB to branch to.
455 // BRIND - Indirect branch. The first operand is the chain, the second
456 // is the value to branch to, which must be of the same type as the target's
460 // BR_JT - Jumptable branch. The first operand is the chain, the second
461 // is the jumptable index, the last one is the jumptable entry index.
464 // BRCOND - Conditional branch. The first operand is the chain,
465 // the second is the condition, the third is the block to branch
466 // to if the condition is true.
469 // BR_CC - Conditional branch. The behavior is like that of SELECT_CC, in
470 // that the condition is represented as condition code, and two nodes to
471 // compare, rather than as a combined SetCC node. The operands in order are
472 // chain, cc, lhs, rhs, block to branch to if condition is true.
475 // RET - Return from function. The first operand is the chain,
476 // and any subsequent operands are pairs of return value and return value
477 // signness for the function. This operation can have variable number of
481 // INLINEASM - Represents an inline asm block. This node always has two
482 // return values: a chain and a flag result. The inputs are as follows:
483 // Operand #0 : Input chain.
484 // Operand #1 : a ExternalSymbolSDNode with a pointer to the asm string.
485 // Operand #2n+2: A RegisterNode.
486 // Operand #2n+3: A TargetConstant, indicating if the reg is a use/def
487 // Operand #last: Optional, an incoming flag.
490 // DBG_LABEL, EH_LABEL - Represents a label in mid basic block used to track
491 // locations needed for debug and exception handling tables. These nodes
492 // take a chain as input and return a chain.
496 // DECLARE - Represents a llvm.dbg.declare intrinsic. It's used to track
497 // local variable declarations for debugging information. First operand is
498 // a chain, while the next two operands are first two arguments (address
499 // and variable) of a llvm.dbg.declare instruction.
502 // STACKSAVE - STACKSAVE has one operand, an input chain. It produces a
503 // value, the same type as the pointer type for the system, and an output
507 // STACKRESTORE has two operands, an input chain and a pointer to restore to
508 // it returns an output chain.
511 // CALLSEQ_START/CALLSEQ_END - These operators mark the beginning and end of
512 // a call sequence, and carry arbitrary information that target might want
513 // to know. The first operand is a chain, the rest are specified by the
514 // target and not touched by the DAG optimizers.
515 // CALLSEQ_START..CALLSEQ_END pairs may not be nested.
516 CALLSEQ_START, // Beginning of a call sequence
517 CALLSEQ_END, // End of a call sequence
519 // VAARG - VAARG has three operands: an input chain, a pointer, and a
520 // SRCVALUE. It returns a pair of values: the vaarg value and a new chain.
523 // VACOPY - VACOPY has five operands: an input chain, a destination pointer,
524 // a source pointer, a SRCVALUE for the destination, and a SRCVALUE for the
528 // VAEND, VASTART - VAEND and VASTART have three operands: an input chain, a
529 // pointer, and a SRCVALUE.
532 // SRCVALUE - This is a node type that holds a Value* that is used to
533 // make reference to a value in the LLVM IR.
536 // MEMOPERAND - This is a node that contains a MachineMemOperand which
537 // records information about a memory reference. This is used to make
538 // AliasAnalysis queries from the backend.
541 // PCMARKER - This corresponds to the pcmarker intrinsic.
544 // READCYCLECOUNTER - This corresponds to the readcyclecounter intrinsic.
545 // The only operand is a chain and a value and a chain are produced. The
546 // value is the contents of the architecture specific cycle counter like
547 // register (or other high accuracy low latency clock source)
550 // HANDLENODE node - Used as a handle for various purposes.
553 // DBG_STOPPOINT - This node is used to represent a source location for
554 // debug info. It takes token chain as input, and carries a line number,
555 // column number, and a pointer to a CompileUnitDesc object identifying
556 // the containing compilation unit. It produces a token chain as output.
559 // DEBUG_LOC - This node is used to represent source line information
560 // embedded in the code. It takes a token chain as input, then a line
561 // number, then a column then a file id (provided by MachineModuleInfo.) It
562 // produces a token chain as output.
565 // TRAMPOLINE - This corresponds to the init_trampoline intrinsic.
566 // It takes as input a token chain, the pointer to the trampoline,
567 // the pointer to the nested function, the pointer to pass for the
568 // 'nest' parameter, a SRCVALUE for the trampoline and another for
569 // the nested function (allowing targets to access the original
570 // Function*). It produces the result of the intrinsic and a token
574 // TRAP - Trapping instruction
577 // PREFETCH - This corresponds to a prefetch intrinsic. It takes chains are
578 // their first operand. The other operands are the address to prefetch,
579 // read / write specifier, and locality specifier.
582 // OUTCHAIN = MEMBARRIER(INCHAIN, load-load, load-store, store-load,
583 // store-store, device)
584 // This corresponds to the memory.barrier intrinsic.
585 // it takes an input chain, 4 operands to specify the type of barrier, an
586 // operand specifying if the barrier applies to device and uncached memory
587 // and produces an output chain.
590 // Val, OUTCHAIN = ATOMIC_CMP_SWAP(INCHAIN, ptr, cmp, swap)
591 // this corresponds to the atomic.lcs intrinsic.
592 // cmp is compared to *ptr, and if equal, swap is stored in *ptr.
593 // the return is always the original value in *ptr
599 // Val, OUTCHAIN = ATOMIC_SWAP(INCHAIN, ptr, amt)
600 // this corresponds to the atomic.swap intrinsic.
601 // amt is stored to *ptr atomically.
602 // the return is always the original value in *ptr
608 // Val, OUTCHAIN = ATOMIC_L[OpName]S(INCHAIN, ptr, amt)
609 // this corresponds to the atomic.[OpName] intrinsic.
610 // op(*ptr, amt) is stored to *ptr atomically.
611 // the return is always the original value in *ptr
653 // BUILTIN_OP_END - This must be the last enum value in this list.
659 /// isBuildVectorAllOnes - Return true if the specified node is a
660 /// BUILD_VECTOR where all of the elements are ~0 or undef.
661 bool isBuildVectorAllOnes(const SDNode *N);
663 /// isBuildVectorAllZeros - Return true if the specified node is a
664 /// BUILD_VECTOR where all of the elements are 0 or undef.
665 bool isBuildVectorAllZeros(const SDNode *N);
667 /// isScalarToVector - Return true if the specified node is a
668 /// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low
669 /// element is not an undef.
670 bool isScalarToVector(const SDNode *N);
672 /// isDebugLabel - Return true if the specified node represents a debug
673 /// label (i.e. ISD::DBG_LABEL or TargetInstrInfo::DBG_LABEL node).
674 bool isDebugLabel(const SDNode *N);
676 //===--------------------------------------------------------------------===//
677 /// MemIndexedMode enum - This enum defines the load / store indexed
678 /// addressing modes.
680 /// UNINDEXED "Normal" load / store. The effective address is already
681 /// computed and is available in the base pointer. The offset
682 /// operand is always undefined. In addition to producing a
683 /// chain, an unindexed load produces one value (result of the
684 /// load); an unindexed store does not produce a value.
686 /// PRE_INC Similar to the unindexed mode where the effective address is
687 /// PRE_DEC the value of the base pointer add / subtract the offset.
688 /// It considers the computation as being folded into the load /
689 /// store operation (i.e. the load / store does the address
690 /// computation as well as performing the memory transaction).
691 /// The base operand is always undefined. In addition to
692 /// producing a chain, pre-indexed load produces two values
693 /// (result of the load and the result of the address
694 /// computation); a pre-indexed store produces one value (result
695 /// of the address computation).
697 /// POST_INC The effective address is the value of the base pointer. The
698 /// POST_DEC value of the offset operand is then added to / subtracted
699 /// from the base after memory transaction. In addition to
700 /// producing a chain, post-indexed load produces two values
701 /// (the result of the load and the result of the base +/- offset
702 /// computation); a post-indexed store produces one value (the
703 /// the result of the base +/- offset computation).
705 enum MemIndexedMode {
714 //===--------------------------------------------------------------------===//
715 /// LoadExtType enum - This enum defines the three variants of LOADEXT
716 /// (load with extension).
718 /// SEXTLOAD loads the integer operand and sign extends it to a larger
719 /// integer result type.
720 /// ZEXTLOAD loads the integer operand and zero extends it to a larger
721 /// integer result type.
722 /// EXTLOAD is used for three things: floating point extending loads,
723 /// integer extending loads [the top bits are undefined], and vector
724 /// extending loads [load into low elt].
734 //===--------------------------------------------------------------------===//
735 /// ISD::CondCode enum - These are ordered carefully to make the bitfields
736 /// below work out, when considering SETFALSE (something that never exists
737 /// dynamically) as 0. "U" -> Unsigned (for integer operands) or Unordered
738 /// (for floating point), "L" -> Less than, "G" -> Greater than, "E" -> Equal
739 /// to. If the "N" column is 1, the result of the comparison is undefined if
740 /// the input is a NAN.
742 /// All of these (except for the 'always folded ops') should be handled for
743 /// floating point. For integer, only the SETEQ,SETNE,SETLT,SETLE,SETGT,
744 /// SETGE,SETULT,SETULE,SETUGT, and SETUGE opcodes are used.
746 /// Note that these are laid out in a specific order to allow bit-twiddling
747 /// to transform conditions.
749 // Opcode N U L G E Intuitive operation
750 SETFALSE, // 0 0 0 0 Always false (always folded)
751 SETOEQ, // 0 0 0 1 True if ordered and equal
752 SETOGT, // 0 0 1 0 True if ordered and greater than
753 SETOGE, // 0 0 1 1 True if ordered and greater than or equal
754 SETOLT, // 0 1 0 0 True if ordered and less than
755 SETOLE, // 0 1 0 1 True if ordered and less than or equal
756 SETONE, // 0 1 1 0 True if ordered and operands are unequal
757 SETO, // 0 1 1 1 True if ordered (no nans)
758 SETUO, // 1 0 0 0 True if unordered: isnan(X) | isnan(Y)
759 SETUEQ, // 1 0 0 1 True if unordered or equal
760 SETUGT, // 1 0 1 0 True if unordered or greater than
761 SETUGE, // 1 0 1 1 True if unordered, greater than, or equal
762 SETULT, // 1 1 0 0 True if unordered or less than
763 SETULE, // 1 1 0 1 True if unordered, less than, or equal
764 SETUNE, // 1 1 1 0 True if unordered or not equal
765 SETTRUE, // 1 1 1 1 Always true (always folded)
766 // Don't care operations: undefined if the input is a nan.
767 SETFALSE2, // 1 X 0 0 0 Always false (always folded)
768 SETEQ, // 1 X 0 0 1 True if equal
769 SETGT, // 1 X 0 1 0 True if greater than
770 SETGE, // 1 X 0 1 1 True if greater than or equal
771 SETLT, // 1 X 1 0 0 True if less than
772 SETLE, // 1 X 1 0 1 True if less than or equal
773 SETNE, // 1 X 1 1 0 True if not equal
774 SETTRUE2, // 1 X 1 1 1 Always true (always folded)
776 SETCC_INVALID // Marker value.
779 /// isSignedIntSetCC - Return true if this is a setcc instruction that
780 /// performs a signed comparison when used with integer operands.
781 inline bool isSignedIntSetCC(CondCode Code) {
782 return Code == SETGT || Code == SETGE || Code == SETLT || Code == SETLE;
785 /// isUnsignedIntSetCC - Return true if this is a setcc instruction that
786 /// performs an unsigned comparison when used with integer operands.
787 inline bool isUnsignedIntSetCC(CondCode Code) {
788 return Code == SETUGT || Code == SETUGE || Code == SETULT || Code == SETULE;
791 /// isTrueWhenEqual - Return true if the specified condition returns true if
792 /// the two operands to the condition are equal. Note that if one of the two
793 /// operands is a NaN, this value is meaningless.
794 inline bool isTrueWhenEqual(CondCode Cond) {
795 return ((int)Cond & 1) != 0;
798 /// getUnorderedFlavor - This function returns 0 if the condition is always
799 /// false if an operand is a NaN, 1 if the condition is always true if the
800 /// operand is a NaN, and 2 if the condition is undefined if the operand is a
802 inline unsigned getUnorderedFlavor(CondCode Cond) {
803 return ((int)Cond >> 3) & 3;
806 /// getSetCCInverse - Return the operation corresponding to !(X op Y), where
807 /// 'op' is a valid SetCC operation.
808 CondCode getSetCCInverse(CondCode Operation, bool isInteger);
810 /// getSetCCSwappedOperands - Return the operation corresponding to (Y op X)
811 /// when given the operation for (X op Y).
812 CondCode getSetCCSwappedOperands(CondCode Operation);
814 /// getSetCCOrOperation - Return the result of a logical OR between different
815 /// comparisons of identical values: ((X op1 Y) | (X op2 Y)). This
816 /// function returns SETCC_INVALID if it is not possible to represent the
817 /// resultant comparison.
818 CondCode getSetCCOrOperation(CondCode Op1, CondCode Op2, bool isInteger);
820 /// getSetCCAndOperation - Return the result of a logical AND between
821 /// different comparisons of identical values: ((X op1 Y) & (X op2 Y)). This
822 /// function returns SETCC_INVALID if it is not possible to represent the
823 /// resultant comparison.
824 CondCode getSetCCAndOperation(CondCode Op1, CondCode Op2, bool isInteger);
825 } // end llvm::ISD namespace
828 //===----------------------------------------------------------------------===//
829 /// SDValue - Unlike LLVM values, Selection DAG nodes may return multiple
830 /// values as the result of a computation. Many nodes return multiple values,
831 /// from loads (which define a token and a return value) to ADDC (which returns
832 /// a result and a carry value), to calls (which may return an arbitrary number
835 /// As such, each use of a SelectionDAG computation must indicate the node that
836 /// computes it as well as which return value to use from that node. This pair
837 /// of information is represented with the SDValue value type.
841 SDNode *Val; // The node defining the value we are using.
843 unsigned ResNo; // Which return value of the node we are using.
845 SDValue() : Val(0), ResNo(0) {}
846 SDValue(SDNode *val, unsigned resno) : Val(val), ResNo(resno) {}
848 /// get the index which selects a specific result in the SDNode
849 unsigned getResNo() const { return ResNo; }
851 bool operator==(const SDValue &O) const {
852 return Val == O.Val && ResNo == O.ResNo;
854 bool operator!=(const SDValue &O) const {
855 return !operator==(O);
857 bool operator<(const SDValue &O) const {
858 return Val < O.Val || (Val == O.Val && ResNo < O.ResNo);
861 SDValue getValue(unsigned R) const {
862 return SDValue(Val, R);
865 // isOperandOf - Return true if this node is an operand of N.
866 bool isOperandOf(SDNode *N) const;
868 /// getValueType - Return the ValueType of the referenced return value.
870 inline MVT getValueType() const;
872 /// getValueSizeInBits - Returns the size of the value in bits.
874 unsigned getValueSizeInBits() const {
875 return getValueType().getSizeInBits();
878 // Forwarding methods - These forward to the corresponding methods in SDNode.
879 inline unsigned getOpcode() const;
880 inline unsigned getNumOperands() const;
881 inline const SDValue &getOperand(unsigned i) const;
882 inline uint64_t getConstantOperandVal(unsigned i) const;
883 inline bool isTargetOpcode() const;
884 inline bool isMachineOpcode() const;
885 inline unsigned getMachineOpcode() const;
888 /// reachesChainWithoutSideEffects - Return true if this operand (which must
889 /// be a chain) reaches the specified operand without crossing any
890 /// side-effecting instructions. In practice, this looks through token
891 /// factors and non-volatile loads. In order to remain efficient, this only
892 /// looks a couple of nodes in, it does not do an exhaustive search.
893 bool reachesChainWithoutSideEffects(SDValue Dest,
894 unsigned Depth = 2) const;
896 /// use_empty - Return true if there are no nodes using value ResNo
899 inline bool use_empty() const;
901 /// hasOneUse - Return true if there is exactly one node using value
902 /// ResNo of node Val.
904 inline bool hasOneUse() const;
908 template<> struct DenseMapInfo<SDValue> {
909 static inline SDValue getEmptyKey() {
910 return SDValue((SDNode*)-1, -1U);
912 static inline SDValue getTombstoneKey() {
913 return SDValue((SDNode*)-1, 0);
915 static unsigned getHashValue(const SDValue &Val) {
916 return ((unsigned)((uintptr_t)Val.Val >> 4) ^
917 (unsigned)((uintptr_t)Val.Val >> 9)) + Val.getResNo();
919 static bool isEqual(const SDValue &LHS, const SDValue &RHS) {
922 static bool isPod() { return true; }
925 /// simplify_type specializations - Allow casting operators to work directly on
926 /// SDValues as if they were SDNode*'s.
927 template<> struct simplify_type<SDValue> {
928 typedef SDNode* SimpleType;
929 static SimpleType getSimplifiedValue(const SDValue &Val) {
930 return static_cast<SimpleType>(Val.Val);
933 template<> struct simplify_type<const SDValue> {
934 typedef SDNode* SimpleType;
935 static SimpleType getSimplifiedValue(const SDValue &Val) {
936 return static_cast<SimpleType>(Val.Val);
940 /// SDUse - Represents a use of the SDNode referred by
944 /// User - Parent node of this operand.
946 /// Prev, next - Pointers to the uses list of the SDNode referred by
951 SDUse(): Operand(), User(NULL), Prev(NULL), Next(NULL) {}
953 SDUse(SDNode *val, unsigned resno) :
954 Operand(val,resno), User(NULL), Prev(NULL), Next(NULL) {}
956 SDUse& operator= (const SDValue& Op) {
963 SDUse& operator= (const SDUse& Op) {
970 SDUse *getNext() { return Next; }
972 SDNode *getUser() { return User; }
974 void setUser(SDNode *p) { User = p; }
976 operator SDValue() const { return Operand; }
978 const SDValue& getSDValue() const { return Operand; }
980 SDNode *&getVal() { return Operand.Val; }
981 SDNode *const &getVal() const { return Operand.Val; }
983 bool operator==(const SDValue &O) const {
987 bool operator!=(const SDValue &O) const {
988 return !(Operand == O);
991 bool operator<(const SDValue &O) const {
996 void addToList(SDUse **List) {
998 if (Next) Next->Prev = &Next;
1003 void removeFromList() {
1005 if (Next) Next->Prev = Prev;
1010 /// simplify_type specializations - Allow casting operators to work directly on
1011 /// SDValues as if they were SDNode*'s.
1012 template<> struct simplify_type<SDUse> {
1013 typedef SDNode* SimpleType;
1014 static SimpleType getSimplifiedValue(const SDUse &Val) {
1015 return static_cast<SimpleType>(Val.getVal());
1018 template<> struct simplify_type<const SDUse> {
1019 typedef SDNode* SimpleType;
1020 static SimpleType getSimplifiedValue(const SDUse &Val) {
1021 return static_cast<SimpleType>(Val.getVal());
1026 /// SDOperandPtr - A helper SDValue pointer class, that can handle
1027 /// arrays of SDUse and arrays of SDValue objects. This is required
1028 /// in many places inside the SelectionDAG.
1030 class SDOperandPtr {
1031 const SDValue *ptr; // The pointer to the SDValue object
1032 int object_size; // The size of the object containg the SDValue
1034 SDOperandPtr() : ptr(0), object_size(0) {}
1036 SDOperandPtr(SDUse * use_ptr) {
1037 ptr = &use_ptr->getSDValue();
1038 object_size = (int)sizeof(SDUse);
1041 SDOperandPtr(const SDValue * op_ptr) {
1043 object_size = (int)sizeof(SDValue);
1046 const SDValue operator *() { return *ptr; }
1047 const SDValue *operator ->() { return ptr; }
1048 SDOperandPtr operator ++ () {
1049 ptr = (SDValue*)((char *)ptr + object_size);
1053 SDOperandPtr operator ++ (int) {
1054 SDOperandPtr tmp = *this;
1055 ptr = (SDValue*)((char *)ptr + object_size);
1059 SDValue operator[] (int idx) const {
1060 return *(SDValue*)((char*) ptr + object_size * idx);
1064 /// SDNode - Represents one node in the SelectionDAG.
1066 class SDNode : public FoldingSetNode, public ilist_node<SDNode> {
1068 /// NodeType - The operation that this node performs.
1072 /// OperandsNeedDelete - This is true if OperandList was new[]'d. If true,
1073 /// then they will be delete[]'d when the node is destroyed.
1074 unsigned short OperandsNeedDelete : 1;
1077 /// SubclassData - This member is defined by this class, but is not used for
1078 /// anything. Subclasses can use it to hold whatever state they find useful.
1079 /// This field is initialized to zero by the ctor.
1080 unsigned short SubclassData : 15;
1083 /// NodeId - Unique id per SDNode in the DAG.
1086 /// OperandList - The values that are used by this operation.
1090 /// ValueList - The types of the values this node defines. SDNode's may
1091 /// define multiple values simultaneously.
1092 const MVT *ValueList;
1094 /// NumOperands/NumValues - The number of entries in the Operand/Value list.
1095 unsigned short NumOperands, NumValues;
1097 /// Uses - List of uses for this SDNode.
1100 /// addUse - add SDUse to the list of uses.
1101 void addUse(SDUse &U) { U.addToList(&Uses); }
1103 // Out-of-line virtual method to give class a home.
1104 virtual void ANCHOR();
1107 assert(NumOperands == 0 && "Operand list not cleared before deletion");
1108 NodeType = ISD::DELETED_NODE;
1111 //===--------------------------------------------------------------------===//
1115 /// getOpcode - Return the SelectionDAG opcode value for this node. For
1116 /// pre-isel nodes (those for which isMachineOpcode returns false), these
1117 /// are the opcode values in the ISD and <target>ISD namespaces. For
1118 /// post-isel opcodes, see getMachineOpcode.
1119 unsigned getOpcode() const { return (unsigned short)NodeType; }
1121 /// isTargetOpcode - Test if this node has a target-specific opcode (in the
1122 /// <target>ISD namespace).
1123 bool isTargetOpcode() const { return NodeType >= ISD::BUILTIN_OP_END; }
1125 /// isMachineOpcode - Test if this node has a post-isel opcode, directly
1126 /// corresponding to a MachineInstr opcode.
1127 bool isMachineOpcode() const { return NodeType < 0; }
1129 /// getMachineOpcode - This may only be called if isMachineOpcode returns
1130 /// true. It returns the MachineInstr opcode value that the node's opcode
1132 unsigned getMachineOpcode() const {
1133 assert(isMachineOpcode() && "Not a MachineInstr opcode!");
1137 /// use_empty - Return true if there are no uses of this node.
1139 bool use_empty() const { return Uses == NULL; }
1141 /// hasOneUse - Return true if there is exactly one use of this node.
1143 bool hasOneUse() const {
1144 return !use_empty() && next(use_begin()) == use_end();
1147 /// use_size - Return the number of uses of this node. This method takes
1148 /// time proportional to the number of uses.
1150 size_t use_size() const { return std::distance(use_begin(), use_end()); }
1152 /// getNodeId - Return the unique node id.
1154 int getNodeId() const { return NodeId; }
1156 /// setNodeId - Set unique node id.
1157 void setNodeId(int Id) { NodeId = Id; }
1159 /// use_iterator - This class provides iterator support for SDUse
1160 /// operands that use a specific SDNode.
1162 : public forward_iterator<SDUse, ptrdiff_t> {
1164 explicit use_iterator(SDUse *op) : Op(op) {
1166 friend class SDNode;
1168 typedef forward_iterator<SDUse, ptrdiff_t>::reference reference;
1169 typedef forward_iterator<SDUse, ptrdiff_t>::pointer pointer;
1171 use_iterator(const use_iterator &I) : Op(I.Op) {}
1172 use_iterator() : Op(0) {}
1174 bool operator==(const use_iterator &x) const {
1177 bool operator!=(const use_iterator &x) const {
1178 return !operator==(x);
1181 /// atEnd - return true if this iterator is at the end of uses list.
1182 bool atEnd() const { return Op == 0; }
1184 // Iterator traversal: forward iteration only.
1185 use_iterator &operator++() { // Preincrement
1186 assert(Op && "Cannot increment end iterator!");
1191 use_iterator operator++(int) { // Postincrement
1192 use_iterator tmp = *this; ++*this; return tmp;
1195 /// Retrieve a pointer to the current user node.
1196 SDNode *operator*() const {
1197 assert(Op && "Cannot dereference end iterator!");
1198 return Op->getUser();
1201 SDNode *operator->() const { return operator*(); }
1203 SDUse &getUse() const { return *Op; }
1205 /// getOperandNo - Retrive the operand # of this use in its user.
1207 unsigned getOperandNo() const {
1208 assert(Op && "Cannot dereference end iterator!");
1209 return (unsigned)(Op - Op->getUser()->OperandList);
1213 /// use_begin/use_end - Provide iteration support to walk over all uses
1216 use_iterator use_begin() const {
1217 return use_iterator(Uses);
1220 static use_iterator use_end() { return use_iterator(0); }
1223 /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
1224 /// indicated value. This method ignores uses of other values defined by this
1226 bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
1228 /// hasAnyUseOfValue - Return true if there are any use of the indicated
1229 /// value. This method ignores uses of other values defined by this operation.
1230 bool hasAnyUseOfValue(unsigned Value) const;
1232 /// isOnlyUserOf - Return true if this node is the only use of N.
1234 bool isOnlyUserOf(SDNode *N) const;
1236 /// isOperandOf - Return true if this node is an operand of N.
1238 bool isOperandOf(SDNode *N) const;
1240 /// isPredecessorOf - Return true if this node is a predecessor of N. This
1241 /// node is either an operand of N or it can be reached by recursively
1242 /// traversing up the operands.
1243 /// NOTE: this is an expensive method. Use it carefully.
1244 bool isPredecessorOf(SDNode *N) const;
1246 /// getNumOperands - Return the number of values used by this operation.
1248 unsigned getNumOperands() const { return NumOperands; }
1250 /// getConstantOperandVal - Helper method returns the integer value of a
1251 /// ConstantSDNode operand.
1252 uint64_t getConstantOperandVal(unsigned Num) const;
1254 const SDValue &getOperand(unsigned Num) const {
1255 assert(Num < NumOperands && "Invalid child # of SDNode!");
1256 return OperandList[Num].getSDValue();
1259 typedef SDUse* op_iterator;
1260 op_iterator op_begin() const { return OperandList; }
1261 op_iterator op_end() const { return OperandList+NumOperands; }
1264 SDVTList getVTList() const {
1265 SDVTList X = { ValueList, NumValues };
1269 /// getNumValues - Return the number of values defined/returned by this
1272 unsigned getNumValues() const { return NumValues; }
1274 /// getValueType - Return the type of a specified result.
1276 MVT getValueType(unsigned ResNo) const {
1277 assert(ResNo < NumValues && "Illegal result number!");
1278 return ValueList[ResNo];
1281 /// getValueSizeInBits - Returns MVT::getSizeInBits(getValueType(ResNo)).
1283 unsigned getValueSizeInBits(unsigned ResNo) const {
1284 return getValueType(ResNo).getSizeInBits();
1287 typedef const MVT* value_iterator;
1288 value_iterator value_begin() const { return ValueList; }
1289 value_iterator value_end() const { return ValueList+NumValues; }
1291 /// getOperationName - Return the opcode of this operation for printing.
1293 std::string getOperationName(const SelectionDAG *G = 0) const;
1294 static const char* getIndexedModeName(ISD::MemIndexedMode AM);
1295 void print(raw_ostream &OS, const SelectionDAG *G = 0) const;
1297 void dump(const SelectionDAG *G) const;
1299 static bool classof(const SDNode *) { return true; }
1301 /// Profile - Gather unique data for the node.
1303 void Profile(FoldingSetNodeID &ID) const;
1306 friend class SelectionDAG;
1307 friend class ilist_traits<SDNode>;
1309 /// getValueTypeList - Return a pointer to the specified value type.
1311 static const MVT *getValueTypeList(MVT VT);
1312 static SDVTList getSDVTList(MVT VT) {
1313 SDVTList Ret = { getValueTypeList(VT), 1 };
1317 SDNode(unsigned Opc, SDVTList VTs, const SDValue *Ops, unsigned NumOps)
1318 : NodeType(Opc), OperandsNeedDelete(true), SubclassData(0),
1319 NodeId(-1), Uses(NULL) {
1320 NumOperands = NumOps;
1321 OperandList = NumOps ? new SDUse[NumOperands] : 0;
1323 for (unsigned i = 0; i != NumOps; ++i) {
1324 OperandList[i] = Ops[i];
1325 OperandList[i].setUser(this);
1326 Ops[i].Val->addUse(OperandList[i]);
1329 ValueList = VTs.VTs;
1330 NumValues = VTs.NumVTs;
1333 SDNode(unsigned Opc, SDVTList VTs, const SDUse *Ops, unsigned NumOps)
1334 : NodeType(Opc), OperandsNeedDelete(true), SubclassData(0),
1335 NodeId(-1), Uses(NULL) {
1336 OperandsNeedDelete = true;
1337 NumOperands = NumOps;
1338 OperandList = NumOps ? new SDUse[NumOperands] : 0;
1340 for (unsigned i = 0; i != NumOps; ++i) {
1341 OperandList[i] = Ops[i];
1342 OperandList[i].setUser(this);
1343 Ops[i].getVal()->addUse(OperandList[i]);
1346 ValueList = VTs.VTs;
1347 NumValues = VTs.NumVTs;
1350 /// This constructor adds no operands itself; operands can be
1351 /// set later with InitOperands.
1352 SDNode(unsigned Opc, SDVTList VTs)
1353 : NodeType(Opc), OperandsNeedDelete(false), SubclassData(0),
1354 NodeId(-1), Uses(NULL) {
1357 ValueList = VTs.VTs;
1358 NumValues = VTs.NumVTs;
1361 /// InitOperands - Initialize the operands list of this node with the
1362 /// specified values, which are part of the node (thus they don't need to be
1363 /// copied in or allocated).
1364 void InitOperands(SDUse *Ops, unsigned NumOps) {
1365 assert(OperandList == 0 && "Operands already set!");
1366 NumOperands = NumOps;
1370 for (unsigned i = 0; i != NumOps; ++i) {
1371 OperandList[i].setUser(this);
1372 Ops[i].getVal()->addUse(OperandList[i]);
1376 /// DropOperands - Release the operands and set this node to have
1378 void DropOperands();
1380 void addUser(unsigned i, SDNode *User) {
1381 assert(User->OperandList[i].getUser() && "Node without parent");
1382 addUse(User->OperandList[i]);
1385 void removeUser(unsigned i, SDNode *User) {
1386 assert(User->OperandList[i].getUser() && "Node without parent");
1387 SDUse &Op = User->OperandList[i];
1388 Op.removeFromList();
1393 // Define inline functions from the SDValue class.
1395 inline unsigned SDValue::getOpcode() const {
1396 return Val->getOpcode();
1398 inline MVT SDValue::getValueType() const {
1399 return Val->getValueType(ResNo);
1401 inline unsigned SDValue::getNumOperands() const {
1402 return Val->getNumOperands();
1404 inline const SDValue &SDValue::getOperand(unsigned i) const {
1405 return Val->getOperand(i);
1407 inline uint64_t SDValue::getConstantOperandVal(unsigned i) const {
1408 return Val->getConstantOperandVal(i);
1410 inline bool SDValue::isTargetOpcode() const {
1411 return Val->isTargetOpcode();
1413 inline bool SDValue::isMachineOpcode() const {
1414 return Val->isMachineOpcode();
1416 inline unsigned SDValue::getMachineOpcode() const {
1417 return Val->getMachineOpcode();
1419 inline bool SDValue::use_empty() const {
1420 return !Val->hasAnyUseOfValue(ResNo);
1422 inline bool SDValue::hasOneUse() const {
1423 return Val->hasNUsesOfValue(1, ResNo);
1426 /// UnarySDNode - This class is used for single-operand SDNodes. This is solely
1427 /// to allow co-allocation of node operands with the node itself.
1428 class UnarySDNode : public SDNode {
1429 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1432 UnarySDNode(unsigned Opc, SDVTList VTs, SDValue X)
1433 : SDNode(Opc, VTs) {
1435 InitOperands(&Op, 1);
1439 /// BinarySDNode - This class is used for two-operand SDNodes. This is solely
1440 /// to allow co-allocation of node operands with the node itself.
1441 class BinarySDNode : public SDNode {
1442 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1445 BinarySDNode(unsigned Opc, SDVTList VTs, SDValue X, SDValue Y)
1446 : SDNode(Opc, VTs) {
1449 InitOperands(Ops, 2);
1453 /// TernarySDNode - This class is used for three-operand SDNodes. This is solely
1454 /// to allow co-allocation of node operands with the node itself.
1455 class TernarySDNode : public SDNode {
1456 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1459 TernarySDNode(unsigned Opc, SDVTList VTs, SDValue X, SDValue Y,
1461 : SDNode(Opc, VTs) {
1465 InitOperands(Ops, 3);
1470 /// HandleSDNode - This class is used to form a handle around another node that
1471 /// is persistant and is updated across invocations of replaceAllUsesWith on its
1472 /// operand. This node should be directly created by end-users and not added to
1473 /// the AllNodes list.
1474 class HandleSDNode : public SDNode {
1475 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1478 // FIXME: Remove the "noinline" attribute once <rdar://problem/5852746> is
1481 explicit __attribute__((__noinline__)) HandleSDNode(SDValue X)
1483 explicit HandleSDNode(SDValue X)
1485 : SDNode(ISD::HANDLENODE, getSDVTList(MVT::Other)) {
1487 InitOperands(&Op, 1);
1490 const SDValue &getValue() const { return Op.getSDValue(); }
1493 /// Abstact virtual class for operations for memory operations
1494 class MemSDNode : public SDNode {
1495 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1498 // MemoryVT - VT of in-memory value.
1501 //! SrcValue - Memory location for alias analysis.
1502 const Value *SrcValue;
1504 //! SVOffset - Memory location offset. Note that base is defined in MemSDNode
1507 /// Flags - the low bit indicates whether this is a volatile reference;
1508 /// the remainder is a log2 encoding of the alignment in bytes.
1512 MemSDNode(unsigned Opc, SDVTList VTs, MVT MemoryVT,
1513 const Value *srcValue, int SVOff,
1514 unsigned alignment, bool isvolatile);
1516 /// Returns alignment and volatility of the memory access
1517 unsigned getAlignment() const { return (1u << (Flags >> 1)) >> 1; }
1518 bool isVolatile() const { return Flags & 1; }
1520 /// Returns the SrcValue and offset that describes the location of the access
1521 const Value *getSrcValue() const { return SrcValue; }
1522 int getSrcValueOffset() const { return SVOffset; }
1524 /// getMemoryVT - Return the type of the in-memory value.
1525 MVT getMemoryVT() const { return MemoryVT; }
1527 /// getMemOperand - Return a MachineMemOperand object describing the memory
1528 /// reference performed by operation.
1529 MachineMemOperand getMemOperand() const;
1531 const SDValue &getChain() const { return getOperand(0); }
1532 const SDValue &getBasePtr() const {
1533 return getOperand(getOpcode() == ISD::STORE ? 2 : 1);
1536 /// getRawFlags - Represent the flags as a bunch of bits.
1538 unsigned getRawFlags() const { return Flags; }
1540 // Methods to support isa and dyn_cast
1541 static bool classof(const MemSDNode *) { return true; }
1542 static bool classof(const SDNode *N) {
1543 return N->getOpcode() == ISD::LOAD ||
1544 N->getOpcode() == ISD::STORE ||
1545 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_8 ||
1546 N->getOpcode() == ISD::ATOMIC_SWAP_8 ||
1547 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_8 ||
1548 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_8 ||
1549 N->getOpcode() == ISD::ATOMIC_LOAD_AND_8 ||
1550 N->getOpcode() == ISD::ATOMIC_LOAD_OR_8 ||
1551 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_8 ||
1552 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_8 ||
1553 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_8 ||
1554 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_8 ||
1555 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_8 ||
1556 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_8 ||
1558 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_16 ||
1559 N->getOpcode() == ISD::ATOMIC_SWAP_16 ||
1560 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_16 ||
1561 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_16 ||
1562 N->getOpcode() == ISD::ATOMIC_LOAD_AND_16 ||
1563 N->getOpcode() == ISD::ATOMIC_LOAD_OR_16 ||
1564 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_16 ||
1565 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_16 ||
1566 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_16 ||
1567 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_16 ||
1568 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_16 ||
1569 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_16 ||
1571 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_32 ||
1572 N->getOpcode() == ISD::ATOMIC_SWAP_32 ||
1573 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_32 ||
1574 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_32 ||
1575 N->getOpcode() == ISD::ATOMIC_LOAD_AND_32 ||
1576 N->getOpcode() == ISD::ATOMIC_LOAD_OR_32 ||
1577 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_32 ||
1578 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_32 ||
1579 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_32 ||
1580 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_32 ||
1581 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_32 ||
1582 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_32 ||
1584 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_64 ||
1585 N->getOpcode() == ISD::ATOMIC_SWAP_64 ||
1586 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_64 ||
1587 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_64 ||
1588 N->getOpcode() == ISD::ATOMIC_LOAD_AND_64 ||
1589 N->getOpcode() == ISD::ATOMIC_LOAD_OR_64 ||
1590 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_64 ||
1591 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_64 ||
1592 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_64 ||
1593 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_64 ||
1594 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_64 ||
1595 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_64;
1599 /// Atomic operations node
1600 class AtomicSDNode : public MemSDNode {
1601 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1605 // Opc: opcode for atomic
1606 // VTL: value type list
1607 // Chain: memory chain for operaand
1608 // Ptr: address to update as a SDValue
1609 // Cmp: compare value
1611 // SrcVal: address to update as a Value (used for MemOperand)
1612 // Align: alignment of memory
1613 AtomicSDNode(unsigned Opc, SDVTList VTL, SDValue Chain, SDValue Ptr,
1614 SDValue Cmp, SDValue Swp, const Value* SrcVal,
1616 : MemSDNode(Opc, VTL, Cmp.getValueType(), SrcVal, /*SVOffset=*/0,
1617 Align, /*isVolatile=*/true) {
1622 InitOperands(Ops, 4);
1624 AtomicSDNode(unsigned Opc, SDVTList VTL, SDValue Chain, SDValue Ptr,
1625 SDValue Val, const Value* SrcVal, unsigned Align=0)
1626 : MemSDNode(Opc, VTL, Val.getValueType(), SrcVal, /*SVOffset=*/0,
1627 Align, /*isVolatile=*/true) {
1631 InitOperands(Ops, 3);
1634 const SDValue &getBasePtr() const { return getOperand(1); }
1635 const SDValue &getVal() const { return getOperand(2); }
1637 bool isCompareAndSwap() const {
1638 unsigned Op = getOpcode();
1639 return Op == ISD::ATOMIC_CMP_SWAP_8 ||
1640 Op == ISD::ATOMIC_CMP_SWAP_16 ||
1641 Op == ISD::ATOMIC_CMP_SWAP_32 ||
1642 Op == ISD::ATOMIC_CMP_SWAP_64;
1645 // Methods to support isa and dyn_cast
1646 static bool classof(const AtomicSDNode *) { return true; }
1647 static bool classof(const SDNode *N) {
1648 return N->getOpcode() == ISD::ATOMIC_CMP_SWAP_8 ||
1649 N->getOpcode() == ISD::ATOMIC_SWAP_8 ||
1650 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_8 ||
1651 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_8 ||
1652 N->getOpcode() == ISD::ATOMIC_LOAD_AND_8 ||
1653 N->getOpcode() == ISD::ATOMIC_LOAD_OR_8 ||
1654 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_8 ||
1655 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_8 ||
1656 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_8 ||
1657 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_8 ||
1658 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_8 ||
1659 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_8 ||
1660 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_16 ||
1661 N->getOpcode() == ISD::ATOMIC_SWAP_16 ||
1662 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_16 ||
1663 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_16 ||
1664 N->getOpcode() == ISD::ATOMIC_LOAD_AND_16 ||
1665 N->getOpcode() == ISD::ATOMIC_LOAD_OR_16 ||
1666 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_16 ||
1667 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_16 ||
1668 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_16 ||
1669 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_16 ||
1670 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_16 ||
1671 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_16 ||
1672 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_32 ||
1673 N->getOpcode() == ISD::ATOMIC_SWAP_32 ||
1674 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_32 ||
1675 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_32 ||
1676 N->getOpcode() == ISD::ATOMIC_LOAD_AND_32 ||
1677 N->getOpcode() == ISD::ATOMIC_LOAD_OR_32 ||
1678 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_32 ||
1679 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_32 ||
1680 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_32 ||
1681 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_32 ||
1682 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_32 ||
1683 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_32 ||
1684 N->getOpcode() == ISD::ATOMIC_CMP_SWAP_64 ||
1685 N->getOpcode() == ISD::ATOMIC_SWAP_64 ||
1686 N->getOpcode() == ISD::ATOMIC_LOAD_ADD_64 ||
1687 N->getOpcode() == ISD::ATOMIC_LOAD_SUB_64 ||
1688 N->getOpcode() == ISD::ATOMIC_LOAD_AND_64 ||
1689 N->getOpcode() == ISD::ATOMIC_LOAD_OR_64 ||
1690 N->getOpcode() == ISD::ATOMIC_LOAD_XOR_64 ||
1691 N->getOpcode() == ISD::ATOMIC_LOAD_NAND_64 ||
1692 N->getOpcode() == ISD::ATOMIC_LOAD_MIN_64 ||
1693 N->getOpcode() == ISD::ATOMIC_LOAD_MAX_64 ||
1694 N->getOpcode() == ISD::ATOMIC_LOAD_UMIN_64 ||
1695 N->getOpcode() == ISD::ATOMIC_LOAD_UMAX_64;
1699 class ConstantSDNode : public SDNode {
1701 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1703 friend class SelectionDAG;
1704 ConstantSDNode(bool isTarget, const APInt &val, MVT VT)
1705 : SDNode(isTarget ? ISD::TargetConstant : ISD::Constant, getSDVTList(VT)),
1710 const APInt &getAPIntValue() const { return Value; }
1711 uint64_t getValue() const { return Value.getZExtValue(); }
1713 int64_t getSignExtended() const {
1714 unsigned Bits = getValueType(0).getSizeInBits();
1715 return ((int64_t)Value.getZExtValue() << (64-Bits)) >> (64-Bits);
1718 bool isNullValue() const { return Value == 0; }
1719 bool isAllOnesValue() const {
1720 return Value == getValueType(0).getIntegerVTBitMask();
1723 static bool classof(const ConstantSDNode *) { return true; }
1724 static bool classof(const SDNode *N) {
1725 return N->getOpcode() == ISD::Constant ||
1726 N->getOpcode() == ISD::TargetConstant;
1730 class ConstantFPSDNode : public SDNode {
1732 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1734 friend class SelectionDAG;
1735 ConstantFPSDNode(bool isTarget, const APFloat& val, MVT VT)
1736 : SDNode(isTarget ? ISD::TargetConstantFP : ISD::ConstantFP,
1737 getSDVTList(VT)), Value(val) {
1741 const APFloat& getValueAPF() const { return Value; }
1743 /// isExactlyValue - We don't rely on operator== working on double values, as
1744 /// it returns true for things that are clearly not equal, like -0.0 and 0.0.
1745 /// As such, this method can be used to do an exact bit-for-bit comparison of
1746 /// two floating point values.
1748 /// We leave the version with the double argument here because it's just so
1749 /// convenient to write "2.0" and the like. Without this function we'd
1750 /// have to duplicate its logic everywhere it's called.
1751 bool isExactlyValue(double V) const {
1752 // convert is not supported on this type
1753 if (&Value.getSemantics() == &APFloat::PPCDoubleDouble)
1756 Tmp.convert(Value.getSemantics(), APFloat::rmNearestTiesToEven);
1757 return isExactlyValue(Tmp);
1759 bool isExactlyValue(const APFloat& V) const;
1761 bool isValueValidForType(MVT VT, const APFloat& Val);
1763 static bool classof(const ConstantFPSDNode *) { return true; }
1764 static bool classof(const SDNode *N) {
1765 return N->getOpcode() == ISD::ConstantFP ||
1766 N->getOpcode() == ISD::TargetConstantFP;
1770 class GlobalAddressSDNode : public SDNode {
1771 GlobalValue *TheGlobal;
1773 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1775 friend class SelectionDAG;
1776 GlobalAddressSDNode(bool isTarget, const GlobalValue *GA, MVT VT, int o = 0);
1779 GlobalValue *getGlobal() const { return TheGlobal; }
1780 int getOffset() const { return Offset; }
1782 static bool classof(const GlobalAddressSDNode *) { return true; }
1783 static bool classof(const SDNode *N) {
1784 return N->getOpcode() == ISD::GlobalAddress ||
1785 N->getOpcode() == ISD::TargetGlobalAddress ||
1786 N->getOpcode() == ISD::GlobalTLSAddress ||
1787 N->getOpcode() == ISD::TargetGlobalTLSAddress;
1791 class FrameIndexSDNode : public SDNode {
1793 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1795 friend class SelectionDAG;
1796 FrameIndexSDNode(int fi, MVT VT, bool isTarg)
1797 : SDNode(isTarg ? ISD::TargetFrameIndex : ISD::FrameIndex, getSDVTList(VT)),
1802 int getIndex() const { return FI; }
1804 static bool classof(const FrameIndexSDNode *) { return true; }
1805 static bool classof(const SDNode *N) {
1806 return N->getOpcode() == ISD::FrameIndex ||
1807 N->getOpcode() == ISD::TargetFrameIndex;
1811 class JumpTableSDNode : public SDNode {
1813 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1815 friend class SelectionDAG;
1816 JumpTableSDNode(int jti, MVT VT, bool isTarg)
1817 : SDNode(isTarg ? ISD::TargetJumpTable : ISD::JumpTable, getSDVTList(VT)),
1822 int getIndex() const { return JTI; }
1824 static bool classof(const JumpTableSDNode *) { return true; }
1825 static bool classof(const SDNode *N) {
1826 return N->getOpcode() == ISD::JumpTable ||
1827 N->getOpcode() == ISD::TargetJumpTable;
1831 class ConstantPoolSDNode : public SDNode {
1834 MachineConstantPoolValue *MachineCPVal;
1836 int Offset; // It's a MachineConstantPoolValue if top bit is set.
1838 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1840 friend class SelectionDAG;
1841 ConstantPoolSDNode(bool isTarget, Constant *c, MVT VT, int o=0)
1842 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1843 getSDVTList(VT)), Offset(o), Alignment(0) {
1844 assert((int)Offset >= 0 && "Offset is too large");
1847 ConstantPoolSDNode(bool isTarget, Constant *c, MVT VT, int o, unsigned Align)
1848 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1849 getSDVTList(VT)), Offset(o), Alignment(Align) {
1850 assert((int)Offset >= 0 && "Offset is too large");
1853 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v,
1855 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1856 getSDVTList(VT)), Offset(o), Alignment(0) {
1857 assert((int)Offset >= 0 && "Offset is too large");
1858 Val.MachineCPVal = v;
1859 Offset |= 1 << (sizeof(unsigned)*8-1);
1861 ConstantPoolSDNode(bool isTarget, MachineConstantPoolValue *v,
1862 MVT VT, int o, unsigned Align)
1863 : SDNode(isTarget ? ISD::TargetConstantPool : ISD::ConstantPool,
1864 getSDVTList(VT)), Offset(o), Alignment(Align) {
1865 assert((int)Offset >= 0 && "Offset is too large");
1866 Val.MachineCPVal = v;
1867 Offset |= 1 << (sizeof(unsigned)*8-1);
1871 bool isMachineConstantPoolEntry() const {
1872 return (int)Offset < 0;
1875 Constant *getConstVal() const {
1876 assert(!isMachineConstantPoolEntry() && "Wrong constantpool type");
1877 return Val.ConstVal;
1880 MachineConstantPoolValue *getMachineCPVal() const {
1881 assert(isMachineConstantPoolEntry() && "Wrong constantpool type");
1882 return Val.MachineCPVal;
1885 int getOffset() const {
1886 return Offset & ~(1 << (sizeof(unsigned)*8-1));
1889 // Return the alignment of this constant pool object, which is either 0 (for
1890 // default alignment) or log2 of the desired value.
1891 unsigned getAlignment() const { return Alignment; }
1893 const Type *getType() const;
1895 static bool classof(const ConstantPoolSDNode *) { return true; }
1896 static bool classof(const SDNode *N) {
1897 return N->getOpcode() == ISD::ConstantPool ||
1898 N->getOpcode() == ISD::TargetConstantPool;
1902 class BasicBlockSDNode : public SDNode {
1903 MachineBasicBlock *MBB;
1904 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1906 friend class SelectionDAG;
1907 explicit BasicBlockSDNode(MachineBasicBlock *mbb)
1908 : SDNode(ISD::BasicBlock, getSDVTList(MVT::Other)), MBB(mbb) {
1912 MachineBasicBlock *getBasicBlock() const { return MBB; }
1914 static bool classof(const BasicBlockSDNode *) { return true; }
1915 static bool classof(const SDNode *N) {
1916 return N->getOpcode() == ISD::BasicBlock;
1920 /// SrcValueSDNode - An SDNode that holds an arbitrary LLVM IR Value. This is
1921 /// used when the SelectionDAG needs to make a simple reference to something
1922 /// in the LLVM IR representation.
1924 /// Note that this is not used for carrying alias information; that is done
1925 /// with MemOperandSDNode, which includes a Value which is required to be a
1926 /// pointer, and several other fields specific to memory references.
1928 class SrcValueSDNode : public SDNode {
1930 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1932 friend class SelectionDAG;
1933 /// Create a SrcValue for a general value.
1934 explicit SrcValueSDNode(const Value *v)
1935 : SDNode(ISD::SRCVALUE, getSDVTList(MVT::Other)), V(v) {}
1938 /// getValue - return the contained Value.
1939 const Value *getValue() const { return V; }
1941 static bool classof(const SrcValueSDNode *) { return true; }
1942 static bool classof(const SDNode *N) {
1943 return N->getOpcode() == ISD::SRCVALUE;
1948 /// MemOperandSDNode - An SDNode that holds a MachineMemOperand. This is
1949 /// used to represent a reference to memory after ISD::LOAD
1950 /// and ISD::STORE have been lowered.
1952 class MemOperandSDNode : public SDNode {
1953 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1955 friend class SelectionDAG;
1956 /// Create a MachineMemOperand node
1957 explicit MemOperandSDNode(const MachineMemOperand &mo)
1958 : SDNode(ISD::MEMOPERAND, getSDVTList(MVT::Other)), MO(mo) {}
1961 /// MO - The contained MachineMemOperand.
1962 const MachineMemOperand MO;
1964 static bool classof(const MemOperandSDNode *) { return true; }
1965 static bool classof(const SDNode *N) {
1966 return N->getOpcode() == ISD::MEMOPERAND;
1971 class RegisterSDNode : public SDNode {
1973 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1975 friend class SelectionDAG;
1976 RegisterSDNode(unsigned reg, MVT VT)
1977 : SDNode(ISD::Register, getSDVTList(VT)), Reg(reg) {
1981 unsigned getReg() const { return Reg; }
1983 static bool classof(const RegisterSDNode *) { return true; }
1984 static bool classof(const SDNode *N) {
1985 return N->getOpcode() == ISD::Register;
1989 class DbgStopPointSDNode : public SDNode {
1993 const CompileUnitDesc *CU;
1994 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
1996 friend class SelectionDAG;
1997 DbgStopPointSDNode(SDValue ch, unsigned l, unsigned c,
1998 const CompileUnitDesc *cu)
1999 : SDNode(ISD::DBG_STOPPOINT, getSDVTList(MVT::Other)),
2000 Line(l), Column(c), CU(cu) {
2002 InitOperands(&Chain, 1);
2005 unsigned getLine() const { return Line; }
2006 unsigned getColumn() const { return Column; }
2007 const CompileUnitDesc *getCompileUnit() const { return CU; }
2009 static bool classof(const DbgStopPointSDNode *) { return true; }
2010 static bool classof(const SDNode *N) {
2011 return N->getOpcode() == ISD::DBG_STOPPOINT;
2015 class LabelSDNode : public SDNode {
2018 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2020 friend class SelectionDAG;
2021 LabelSDNode(unsigned NodeTy, SDValue ch, unsigned id)
2022 : SDNode(NodeTy, getSDVTList(MVT::Other)), LabelID(id) {
2024 InitOperands(&Chain, 1);
2027 unsigned getLabelID() const { return LabelID; }
2029 static bool classof(const LabelSDNode *) { return true; }
2030 static bool classof(const SDNode *N) {
2031 return N->getOpcode() == ISD::DBG_LABEL ||
2032 N->getOpcode() == ISD::EH_LABEL;
2036 class ExternalSymbolSDNode : public SDNode {
2038 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2040 friend class SelectionDAG;
2041 ExternalSymbolSDNode(bool isTarget, const char *Sym, MVT VT)
2042 : SDNode(isTarget ? ISD::TargetExternalSymbol : ISD::ExternalSymbol,
2043 getSDVTList(VT)), Symbol(Sym) {
2047 const char *getSymbol() const { return Symbol; }
2049 static bool classof(const ExternalSymbolSDNode *) { return true; }
2050 static bool classof(const SDNode *N) {
2051 return N->getOpcode() == ISD::ExternalSymbol ||
2052 N->getOpcode() == ISD::TargetExternalSymbol;
2056 class CondCodeSDNode : public SDNode {
2057 ISD::CondCode Condition;
2058 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2060 friend class SelectionDAG;
2061 explicit CondCodeSDNode(ISD::CondCode Cond)
2062 : SDNode(ISD::CONDCODE, getSDVTList(MVT::Other)), Condition(Cond) {
2066 ISD::CondCode get() const { return Condition; }
2068 static bool classof(const CondCodeSDNode *) { return true; }
2069 static bool classof(const SDNode *N) {
2070 return N->getOpcode() == ISD::CONDCODE;
2077 static const uint64_t NoFlagSet = 0ULL;
2078 static const uint64_t ZExt = 1ULL<<0; ///< Zero extended
2079 static const uint64_t ZExtOffs = 0;
2080 static const uint64_t SExt = 1ULL<<1; ///< Sign extended
2081 static const uint64_t SExtOffs = 1;
2082 static const uint64_t InReg = 1ULL<<2; ///< Passed in register
2083 static const uint64_t InRegOffs = 2;
2084 static const uint64_t SRet = 1ULL<<3; ///< Hidden struct-ret ptr
2085 static const uint64_t SRetOffs = 3;
2086 static const uint64_t ByVal = 1ULL<<4; ///< Struct passed by value
2087 static const uint64_t ByValOffs = 4;
2088 static const uint64_t Nest = 1ULL<<5; ///< Nested fn static chain
2089 static const uint64_t NestOffs = 5;
2090 static const uint64_t ByValAlign = 0xFULL << 6; //< Struct alignment
2091 static const uint64_t ByValAlignOffs = 6;
2092 static const uint64_t Split = 1ULL << 10;
2093 static const uint64_t SplitOffs = 10;
2094 static const uint64_t OrigAlign = 0x1FULL<<27;
2095 static const uint64_t OrigAlignOffs = 27;
2096 static const uint64_t ByValSize = 0xffffffffULL << 32; //< Struct size
2097 static const uint64_t ByValSizeOffs = 32;
2099 static const uint64_t One = 1ULL; //< 1 of this type, for shifts
2103 ArgFlagsTy() : Flags(0) { }
2105 bool isZExt() const { return Flags & ZExt; }
2106 void setZExt() { Flags |= One << ZExtOffs; }
2108 bool isSExt() const { return Flags & SExt; }
2109 void setSExt() { Flags |= One << SExtOffs; }
2111 bool isInReg() const { return Flags & InReg; }
2112 void setInReg() { Flags |= One << InRegOffs; }
2114 bool isSRet() const { return Flags & SRet; }
2115 void setSRet() { Flags |= One << SRetOffs; }
2117 bool isByVal() const { return Flags & ByVal; }
2118 void setByVal() { Flags |= One << ByValOffs; }
2120 bool isNest() const { return Flags & Nest; }
2121 void setNest() { Flags |= One << NestOffs; }
2123 unsigned getByValAlign() const {
2125 ((One << ((Flags & ByValAlign) >> ByValAlignOffs)) / 2);
2127 void setByValAlign(unsigned A) {
2128 Flags = (Flags & ~ByValAlign) |
2129 (uint64_t(Log2_32(A) + 1) << ByValAlignOffs);
2132 bool isSplit() const { return Flags & Split; }
2133 void setSplit() { Flags |= One << SplitOffs; }
2135 unsigned getOrigAlign() const {
2137 ((One << ((Flags & OrigAlign) >> OrigAlignOffs)) / 2);
2139 void setOrigAlign(unsigned A) {
2140 Flags = (Flags & ~OrigAlign) |
2141 (uint64_t(Log2_32(A) + 1) << OrigAlignOffs);
2144 unsigned getByValSize() const {
2145 return (unsigned)((Flags & ByValSize) >> ByValSizeOffs);
2147 void setByValSize(unsigned S) {
2148 Flags = (Flags & ~ByValSize) | (uint64_t(S) << ByValSizeOffs);
2151 /// getArgFlagsString - Returns the flags as a string, eg: "zext align:4".
2152 std::string getArgFlagsString();
2154 /// getRawBits - Represent the flags as a bunch of bits.
2155 uint64_t getRawBits() const { return Flags; }
2159 /// ARG_FLAGSSDNode - Leaf node holding parameter flags.
2160 class ARG_FLAGSSDNode : public SDNode {
2161 ISD::ArgFlagsTy TheFlags;
2162 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2164 friend class SelectionDAG;
2165 explicit ARG_FLAGSSDNode(ISD::ArgFlagsTy Flags)
2166 : SDNode(ISD::ARG_FLAGS, getSDVTList(MVT::Other)), TheFlags(Flags) {
2169 ISD::ArgFlagsTy getArgFlags() const { return TheFlags; }
2171 static bool classof(const ARG_FLAGSSDNode *) { return true; }
2172 static bool classof(const SDNode *N) {
2173 return N->getOpcode() == ISD::ARG_FLAGS;
2177 /// VTSDNode - This class is used to represent MVT's, which are used
2178 /// to parameterize some operations.
2179 class VTSDNode : public SDNode {
2181 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2183 friend class SelectionDAG;
2184 explicit VTSDNode(MVT VT)
2185 : SDNode(ISD::VALUETYPE, getSDVTList(MVT::Other)), ValueType(VT) {
2189 MVT getVT() const { return ValueType; }
2191 static bool classof(const VTSDNode *) { return true; }
2192 static bool classof(const SDNode *N) {
2193 return N->getOpcode() == ISD::VALUETYPE;
2197 /// LSBaseSDNode - Base class for LoadSDNode and StoreSDNode
2199 class LSBaseSDNode : public MemSDNode {
2201 //! Operand array for load and store
2203 \note Moving this array to the base class captures more
2204 common functionality shared between LoadSDNode and
2209 LSBaseSDNode(ISD::NodeType NodeTy, SDValue *Operands, unsigned numOperands,
2210 SDVTList VTs, ISD::MemIndexedMode AM, MVT VT,
2211 const Value *SV, int SVO, unsigned Align, bool Vol)
2212 : MemSDNode(NodeTy, VTs, VT, SV, SVO, Align, Vol) {
2214 for (unsigned i = 0; i != numOperands; ++i)
2215 Ops[i] = Operands[i];
2216 InitOperands(Ops, numOperands);
2217 assert(Align != 0 && "Loads and stores should have non-zero aligment");
2218 assert((getOffset().getOpcode() == ISD::UNDEF || isIndexed()) &&
2219 "Only indexed loads and stores have a non-undef offset operand");
2222 const SDValue &getOffset() const {
2223 return getOperand(getOpcode() == ISD::LOAD ? 2 : 3);
2226 /// getAddressingMode - Return the addressing mode for this load or store:
2227 /// unindexed, pre-inc, pre-dec, post-inc, or post-dec.
2228 ISD::MemIndexedMode getAddressingMode() const {
2229 return ISD::MemIndexedMode(SubclassData & 7);
2232 /// isIndexed - Return true if this is a pre/post inc/dec load/store.
2233 bool isIndexed() const { return getAddressingMode() != ISD::UNINDEXED; }
2235 /// isUnindexed - Return true if this is NOT a pre/post inc/dec load/store.
2236 bool isUnindexed() const { return getAddressingMode() == ISD::UNINDEXED; }
2238 static bool classof(const LSBaseSDNode *) { return true; }
2239 static bool classof(const SDNode *N) {
2240 return N->getOpcode() == ISD::LOAD ||
2241 N->getOpcode() == ISD::STORE;
2245 /// LoadSDNode - This class is used to represent ISD::LOAD nodes.
2247 class LoadSDNode : public LSBaseSDNode {
2248 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2250 friend class SelectionDAG;
2251 LoadSDNode(SDValue *ChainPtrOff, SDVTList VTs,
2252 ISD::MemIndexedMode AM, ISD::LoadExtType ETy, MVT LVT,
2253 const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
2254 : LSBaseSDNode(ISD::LOAD, ChainPtrOff, 3,
2255 VTs, AM, LVT, SV, O, Align, Vol) {
2256 SubclassData |= (unsigned short)ETy << 3;
2260 /// getExtensionType - Return whether this is a plain node,
2261 /// or one of the varieties of value-extending loads.
2262 ISD::LoadExtType getExtensionType() const {
2263 return ISD::LoadExtType((SubclassData >> 3) & 3);
2266 const SDValue &getBasePtr() const { return getOperand(1); }
2267 const SDValue &getOffset() const { return getOperand(2); }
2269 static bool classof(const LoadSDNode *) { return true; }
2270 static bool classof(const SDNode *N) {
2271 return N->getOpcode() == ISD::LOAD;
2275 /// StoreSDNode - This class is used to represent ISD::STORE nodes.
2277 class StoreSDNode : public LSBaseSDNode {
2278 virtual void ANCHOR(); // Out-of-line virtual method to give class a home.
2280 friend class SelectionDAG;
2281 StoreSDNode(SDValue *ChainValuePtrOff, SDVTList VTs,
2282 ISD::MemIndexedMode AM, bool isTrunc, MVT SVT,
2283 const Value *SV, int O=0, unsigned Align=0, bool Vol=false)
2284 : LSBaseSDNode(ISD::STORE, ChainValuePtrOff, 4,
2285 VTs, AM, SVT, SV, O, Align, Vol) {
2286 SubclassData |= (unsigned short)isTrunc << 3;
2290 /// isTruncatingStore - Return true if the op does a truncation before store.
2291 /// For integers this is the same as doing a TRUNCATE and storing the result.
2292 /// For floats, it is the same as doing an FP_ROUND and storing the result.
2293 bool isTruncatingStore() const { return (SubclassData >> 3) & 1; }
2295 const SDValue &getValue() const { return getOperand(1); }
2296 const SDValue &getBasePtr() const { return getOperand(2); }
2297 const SDValue &getOffset() const { return getOperand(3); }
2299 static bool classof(const StoreSDNode *) { return true; }
2300 static bool classof(const SDNode *N) {
2301 return N->getOpcode() == ISD::STORE;
2306 class SDNodeIterator : public forward_iterator<SDNode, ptrdiff_t> {
2310 SDNodeIterator(SDNode *N, unsigned Op) : Node(N), Operand(Op) {}
2312 bool operator==(const SDNodeIterator& x) const {
2313 return Operand == x.Operand;
2315 bool operator!=(const SDNodeIterator& x) const { return !operator==(x); }
2317 const SDNodeIterator &operator=(const SDNodeIterator &I) {
2318 assert(I.Node == Node && "Cannot assign iterators to two different nodes!");
2319 Operand = I.Operand;
2323 pointer operator*() const {
2324 return Node->getOperand(Operand).Val;
2326 pointer operator->() const { return operator*(); }
2328 SDNodeIterator& operator++() { // Preincrement
2332 SDNodeIterator operator++(int) { // Postincrement
2333 SDNodeIterator tmp = *this; ++*this; return tmp;
2336 static SDNodeIterator begin(SDNode *N) { return SDNodeIterator(N, 0); }
2337 static SDNodeIterator end (SDNode *N) {
2338 return SDNodeIterator(N, N->getNumOperands());
2341 unsigned getOperand() const { return Operand; }
2342 const SDNode *getNode() const { return Node; }
2345 template <> struct GraphTraits<SDNode*> {
2346 typedef SDNode NodeType;
2347 typedef SDNodeIterator ChildIteratorType;
2348 static inline NodeType *getEntryNode(SDNode *N) { return N; }
2349 static inline ChildIteratorType child_begin(NodeType *N) {
2350 return SDNodeIterator::begin(N);
2352 static inline ChildIteratorType child_end(NodeType *N) {
2353 return SDNodeIterator::end(N);
2357 /// LargestSDNode - The largest SDNode class.
2359 typedef LoadSDNode LargestSDNode;
2361 /// MostAlignedSDNode - The SDNode class with the greatest alignment
2364 typedef ConstantSDNode MostAlignedSDNode;
2367 /// isNormalLoad - Returns true if the specified node is a non-extending
2368 /// and unindexed load.
2369 inline bool isNormalLoad(const SDNode *N) {
2370 const LoadSDNode *Ld = dyn_cast<LoadSDNode>(N);
2371 return Ld && Ld->getExtensionType() == ISD::NON_EXTLOAD &&
2372 Ld->getAddressingMode() == ISD::UNINDEXED;
2375 /// isNON_EXTLoad - Returns true if the specified node is a non-extending
2377 inline bool isNON_EXTLoad(const SDNode *N) {
2378 return isa<LoadSDNode>(N) &&
2379 cast<LoadSDNode>(N)->getExtensionType() == ISD::NON_EXTLOAD;
2382 /// isEXTLoad - Returns true if the specified node is a EXTLOAD.
2384 inline bool isEXTLoad(const SDNode *N) {
2385 return isa<LoadSDNode>(N) &&
2386 cast<LoadSDNode>(N)->getExtensionType() == ISD::EXTLOAD;
2389 /// isSEXTLoad - Returns true if the specified node is a SEXTLOAD.
2391 inline bool isSEXTLoad(const SDNode *N) {
2392 return isa<LoadSDNode>(N) &&
2393 cast<LoadSDNode>(N)->getExtensionType() == ISD::SEXTLOAD;
2396 /// isZEXTLoad - Returns true if the specified node is a ZEXTLOAD.
2398 inline bool isZEXTLoad(const SDNode *N) {
2399 return isa<LoadSDNode>(N) &&
2400 cast<LoadSDNode>(N)->getExtensionType() == ISD::ZEXTLOAD;
2403 /// isUNINDEXEDLoad - Returns true if the specified node is an unindexed load.
2405 inline bool isUNINDEXEDLoad(const SDNode *N) {
2406 return isa<LoadSDNode>(N) &&
2407 cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
2410 /// isNormalStore - Returns true if the specified node is a non-truncating
2411 /// and unindexed store.
2412 inline bool isNormalStore(const SDNode *N) {
2413 const StoreSDNode *St = dyn_cast<StoreSDNode>(N);
2414 return St && !St->isTruncatingStore() &&
2415 St->getAddressingMode() == ISD::UNINDEXED;
2418 /// isNON_TRUNCStore - Returns true if the specified node is a non-truncating
2420 inline bool isNON_TRUNCStore(const SDNode *N) {
2421 return isa<StoreSDNode>(N) && !cast<StoreSDNode>(N)->isTruncatingStore();
2424 /// isTRUNCStore - Returns true if the specified node is a truncating
2426 inline bool isTRUNCStore(const SDNode *N) {
2427 return isa<StoreSDNode>(N) && cast<StoreSDNode>(N)->isTruncatingStore();
2430 /// isUNINDEXEDStore - Returns true if the specified node is an
2431 /// unindexed store.
2432 inline bool isUNINDEXEDStore(const SDNode *N) {
2433 return isa<StoreSDNode>(N) &&
2434 cast<StoreSDNode>(N)->getAddressingMode() == ISD::UNINDEXED;
2439 } // end llvm namespace