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//===-- LegalizeTypes.h - DAG Type Legalizer class definition ---*- C++ -*-===//
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// The LLVM Compiler Infrastructure
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//===----------------------------------------------------------------------===//
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// This file defines the DAGTypeLegalizer class. This is a private interface
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// shared between the code that implements the SelectionDAG::LegalizeTypes
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_LIB_CODEGEN_SELECTIONDAG_LEGALIZETYPES_H
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#define LLVM_LIB_CODEGEN_SELECTIONDAG_LEGALIZETYPES_H
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/DenseSet.h"
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#include "llvm/CodeGen/SelectionDAG.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Target/TargetLowering.h"
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//===----------------------------------------------------------------------===//
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/// DAGTypeLegalizer - This takes an arbitrary SelectionDAG as input and hacks
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/// on it until only value types the target machine can handle are left. This
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/// involves promoting small sizes to large sizes or splitting up large values
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/// into small values.
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class LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer {
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const TargetLowering &TLI;
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// NodeIdFlags - This pass uses the NodeId on the SDNodes to hold information
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// about the state of the node. The enum has all the values.
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/// ReadyToProcess - All operands have been processed, so this node is ready
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/// NewNode - This is a new node, not before seen, that was created in the
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/// process of legalizing some other node.
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/// Unanalyzed - This node's ID needs to be set to the number of its
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/// unprocessed operands.
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/// Processed - This is a node that has already been processed.
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// 1+ - This is a node which has this many unprocessed operands.
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/// ValueTypeActions - This is a bitvector that contains two bits for each
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/// simple value type, where the two bits correspond to the LegalizeAction
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/// enum from TargetLowering. This can be queried with "getTypeAction(VT)".
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TargetLowering::ValueTypeActionImpl ValueTypeActions;
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/// getTypeAction - Return how we should legalize values of this type.
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TargetLowering::LegalizeTypeAction getTypeAction(EVT VT) const {
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return TLI.getTypeAction(*DAG.getContext(), VT);
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/// isTypeLegal - Return true if this type is legal on this target.
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bool isTypeLegal(EVT VT) const {
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return TLI.getTypeAction(*DAG.getContext(), VT) == TargetLowering::TypeLegal;
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EVT getSetCCResultType(EVT VT) const {
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return TLI.getSetCCResultType(DAG.getDataLayout(), *DAG.getContext(), VT);
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/// IgnoreNodeResults - Pretend all of this node's results are legal.
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bool IgnoreNodeResults(SDNode *N) const {
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return N->getOpcode() == ISD::TargetConstant;
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/// PromotedIntegers - For integer nodes that are below legal width, this map
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/// indicates what promoted value to use.
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SmallDenseMap<SDValue, SDValue, 8> PromotedIntegers;
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/// ExpandedIntegers - For integer nodes that need to be expanded this map
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/// indicates which operands are the expanded version of the input.
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SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedIntegers;
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/// SoftenedFloats - For floating point nodes converted to integers of
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/// the same size, this map indicates the converted value to use.
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SmallDenseMap<SDValue, SDValue, 8> SoftenedFloats;
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/// PromotedFloats - For floating point nodes that have a smaller precision
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/// than the smallest supported precision, this map indicates what promoted
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SmallDenseMap<SDValue, SDValue, 8> PromotedFloats;
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/// ExpandedFloats - For float nodes that need to be expanded this map
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/// indicates which operands are the expanded version of the input.
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SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> ExpandedFloats;
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/// ScalarizedVectors - For nodes that are <1 x ty>, this map indicates the
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/// scalar value of type 'ty' to use.
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SmallDenseMap<SDValue, SDValue, 8> ScalarizedVectors;
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/// SplitVectors - For nodes that need to be split this map indicates
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/// which operands are the expanded version of the input.
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SmallDenseMap<SDValue, std::pair<SDValue, SDValue>, 8> SplitVectors;
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/// WidenedVectors - For vector nodes that need to be widened, indicates
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/// the widened value to use.
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SmallDenseMap<SDValue, SDValue, 8> WidenedVectors;
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/// ReplacedValues - For values that have been replaced with another,
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/// indicates the replacement value to use.
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SmallDenseMap<SDValue, SDValue, 8> ReplacedValues;
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/// Worklist - This defines a worklist of nodes to process. In order to be
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/// pushed onto this worklist, all operands of a node must have already been
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SmallVector<SDNode*, 128> Worklist;
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explicit DAGTypeLegalizer(SelectionDAG &dag)
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: TLI(dag.getTargetLoweringInfo()), DAG(dag),
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ValueTypeActions(TLI.getValueTypeActions()) {
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static_assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE,
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"Too many value types for ValueTypeActions to hold!");
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/// run - This is the main entry point for the type legalizer. This does a
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/// top-down traversal of the dag, legalizing types as it goes. Returns
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/// "true" if it made any changes.
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void NoteDeletion(SDNode *Old, SDNode *New) {
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for (unsigned i = 0, e = Old->getNumValues(); i != e; ++i)
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ReplacedValues[SDValue(Old, i)] = SDValue(New, i);
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SelectionDAG &getDAG() const { return DAG; }
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SDNode *AnalyzeNewNode(SDNode *N);
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void AnalyzeNewValue(SDValue &Val);
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void ExpungeNode(SDNode *N);
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void PerformExpensiveChecks();
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void RemapValue(SDValue &N);
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SDValue BitConvertToInteger(SDValue Op);
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SDValue BitConvertVectorToIntegerVector(SDValue Op);
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SDValue CreateStackStoreLoad(SDValue Op, EVT DestVT);
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bool CustomLowerNode(SDNode *N, EVT VT, bool LegalizeResult);
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bool CustomWidenLowerNode(SDNode *N, EVT VT);
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/// DisintegrateMERGE_VALUES - Replace each result of the given MERGE_VALUES
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/// node with the corresponding input operand, except for the result 'ResNo',
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/// for which the corresponding input operand is returned.
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SDValue DisintegrateMERGE_VALUES(SDNode *N, unsigned ResNo);
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SDValue GetVectorElementPointer(SDValue VecPtr, EVT EltVT, SDValue Index);
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SDValue JoinIntegers(SDValue Lo, SDValue Hi);
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SDValue LibCallify(RTLIB::Libcall LC, SDNode *N, bool isSigned);
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std::pair<SDValue, SDValue> ExpandChainLibCall(RTLIB::Libcall LC,
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SDNode *Node, bool isSigned);
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std::pair<SDValue, SDValue> ExpandAtomic(SDNode *Node);
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SDValue PromoteTargetBoolean(SDValue Bool, EVT ValVT);
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void ReplaceValueWith(SDValue From, SDValue To);
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void SplitInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
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void SplitInteger(SDValue Op, EVT LoVT, EVT HiVT,
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SDValue &Lo, SDValue &Hi);
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//===--------------------------------------------------------------------===//
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// Integer Promotion Support: LegalizeIntegerTypes.cpp
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//===--------------------------------------------------------------------===//
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/// GetPromotedInteger - Given a processed operand Op which was promoted to a
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/// larger integer type, this returns the promoted value. The low bits of the
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/// promoted value corresponding to the original type are exactly equal to Op.
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/// The extra bits contain rubbish, so the promoted value may need to be zero-
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/// or sign-extended from the original type before it is usable (the helpers
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/// SExtPromotedInteger and ZExtPromotedInteger can do this for you).
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/// For example, if Op is an i16 and was promoted to an i32, then this method
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/// returns an i32, the lower 16 bits of which coincide with Op, and the upper
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/// 16 bits of which contain rubbish.
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SDValue GetPromotedInteger(SDValue Op) {
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SDValue &PromotedOp = PromotedIntegers[Op];
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RemapValue(PromotedOp);
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assert(PromotedOp.getNode() && "Operand wasn't promoted?");
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void SetPromotedInteger(SDValue Op, SDValue Result);
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/// SExtPromotedInteger - Get a promoted operand and sign extend it to the
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SDValue SExtPromotedInteger(SDValue Op) {
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EVT OldVT = Op.getValueType();
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Op = GetPromotedInteger(Op);
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return DAG.getNode(ISD::SIGN_EXTEND_INREG, dl, Op.getValueType(), Op,
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DAG.getValueType(OldVT));
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/// ZExtPromotedInteger - Get a promoted operand and zero extend it to the
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SDValue ZExtPromotedInteger(SDValue Op) {
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EVT OldVT = Op.getValueType();
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Op = GetPromotedInteger(Op);
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return DAG.getZeroExtendInReg(Op, dl, OldVT.getScalarType());
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// Integer Result Promotion.
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void PromoteIntegerResult(SDNode *N, unsigned ResNo);
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SDValue PromoteIntRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
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SDValue PromoteIntRes_AssertSext(SDNode *N);
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SDValue PromoteIntRes_AssertZext(SDNode *N);
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SDValue PromoteIntRes_Atomic0(AtomicSDNode *N);
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SDValue PromoteIntRes_Atomic1(AtomicSDNode *N);
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SDValue PromoteIntRes_AtomicCmpSwap(AtomicSDNode *N, unsigned ResNo);
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SDValue PromoteIntRes_EXTRACT_SUBVECTOR(SDNode *N);
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SDValue PromoteIntRes_VECTOR_SHUFFLE(SDNode *N);
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SDValue PromoteIntRes_BUILD_VECTOR(SDNode *N);
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SDValue PromoteIntRes_SCALAR_TO_VECTOR(SDNode *N);
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SDValue PromoteIntRes_INSERT_VECTOR_ELT(SDNode *N);
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SDValue PromoteIntRes_CONCAT_VECTORS(SDNode *N);
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SDValue PromoteIntRes_BITCAST(SDNode *N);
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SDValue PromoteIntRes_BSWAP(SDNode *N);
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SDValue PromoteIntRes_BUILD_PAIR(SDNode *N);
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SDValue PromoteIntRes_Constant(SDNode *N);
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SDValue PromoteIntRes_CONVERT_RNDSAT(SDNode *N);
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SDValue PromoteIntRes_CTLZ(SDNode *N);
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SDValue PromoteIntRes_CTPOP(SDNode *N);
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SDValue PromoteIntRes_CTTZ(SDNode *N);
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SDValue PromoteIntRes_EXTRACT_VECTOR_ELT(SDNode *N);
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SDValue PromoteIntRes_FP_TO_XINT(SDNode *N);
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SDValue PromoteIntRes_FP_TO_FP16(SDNode *N);
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SDValue PromoteIntRes_INT_EXTEND(SDNode *N);
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SDValue PromoteIntRes_LOAD(LoadSDNode *N);
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SDValue PromoteIntRes_MLOAD(MaskedLoadSDNode *N);
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SDValue PromoteIntRes_Overflow(SDNode *N);
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SDValue PromoteIntRes_SADDSUBO(SDNode *N, unsigned ResNo);
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SDValue PromoteIntRes_SDIV(SDNode *N);
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SDValue PromoteIntRes_SELECT(SDNode *N);
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SDValue PromoteIntRes_VSELECT(SDNode *N);
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SDValue PromoteIntRes_SELECT_CC(SDNode *N);
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SDValue PromoteIntRes_SETCC(SDNode *N);
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SDValue PromoteIntRes_SHL(SDNode *N);
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SDValue PromoteIntRes_SimpleIntBinOp(SDNode *N);
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SDValue PromoteIntRes_SIGN_EXTEND_INREG(SDNode *N);
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SDValue PromoteIntRes_SRA(SDNode *N);
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SDValue PromoteIntRes_SRL(SDNode *N);
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SDValue PromoteIntRes_TRUNCATE(SDNode *N);
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SDValue PromoteIntRes_UADDSUBO(SDNode *N, unsigned ResNo);
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SDValue PromoteIntRes_UDIV(SDNode *N);
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SDValue PromoteIntRes_UNDEF(SDNode *N);
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SDValue PromoteIntRes_VAARG(SDNode *N);
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SDValue PromoteIntRes_XMULO(SDNode *N, unsigned ResNo);
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// Integer Operand Promotion.
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bool PromoteIntegerOperand(SDNode *N, unsigned OperandNo);
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SDValue PromoteIntOp_ANY_EXTEND(SDNode *N);
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SDValue PromoteIntOp_ATOMIC_STORE(AtomicSDNode *N);
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SDValue PromoteIntOp_BITCAST(SDNode *N);
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SDValue PromoteIntOp_BUILD_PAIR(SDNode *N);
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SDValue PromoteIntOp_BR_CC(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_BRCOND(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
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SDValue PromoteIntOp_CONVERT_RNDSAT(SDNode *N);
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SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_EXTRACT_ELEMENT(SDNode *N);
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SDValue PromoteIntOp_EXTRACT_VECTOR_ELT(SDNode *N);
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SDValue PromoteIntOp_EXTRACT_SUBVECTOR(SDNode *N);
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SDValue PromoteIntOp_CONCAT_VECTORS(SDNode *N);
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SDValue PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N);
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SDValue PromoteIntOp_SELECT(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_SELECT_CC(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_SETCC(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_VSETCC(SDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_Shift(SDNode *N);
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SDValue PromoteIntOp_SIGN_EXTEND(SDNode *N);
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SDValue PromoteIntOp_SINT_TO_FP(SDNode *N);
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SDValue PromoteIntOp_STORE(StoreSDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_TRUNCATE(SDNode *N);
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SDValue PromoteIntOp_UINT_TO_FP(SDNode *N);
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SDValue PromoteIntOp_ZERO_EXTEND(SDNode *N);
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SDValue PromoteIntOp_MSTORE(MaskedStoreSDNode *N, unsigned OpNo);
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SDValue PromoteIntOp_MLOAD(MaskedLoadSDNode *N, unsigned OpNo);
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void PromoteSetCCOperands(SDValue &LHS,SDValue &RHS, ISD::CondCode Code);
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//===--------------------------------------------------------------------===//
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// Integer Expansion Support: LegalizeIntegerTypes.cpp
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//===--------------------------------------------------------------------===//
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/// GetExpandedInteger - Given a processed operand Op which was expanded into
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/// two integers of half the size, this returns the two halves. The low bits
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/// of Op are exactly equal to the bits of Lo; the high bits exactly equal Hi.
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/// For example, if Op is an i64 which was expanded into two i32's, then this
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/// method returns the two i32's, with Lo being equal to the lower 32 bits of
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/// Op, and Hi being equal to the upper 32 bits.
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void GetExpandedInteger(SDValue Op, SDValue &Lo, SDValue &Hi);
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void SetExpandedInteger(SDValue Op, SDValue Lo, SDValue Hi);
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// Integer Result Expansion.
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void ExpandIntegerResult(SDNode *N, unsigned ResNo);
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void ExpandIntRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
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SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ANY_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_AssertSext (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_AssertZext (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_Constant (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_CTLZ (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_CTPOP (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_CTTZ (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_LOAD (LoadSDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_SIGN_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_SIGN_EXTEND_INREG (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_TRUNCATE (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ZERO_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_FP_TO_SINT (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_FP_TO_UINT (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_Logical (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ADDSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ADDSUBC (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ADDSUBE (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_BSWAP (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_MUL (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_SDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_SREM (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_UDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_UREM (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_Shift (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_SADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_UADDSUBO (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_XMULO (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandIntRes_ATOMIC_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandShiftByConstant(SDNode *N, const APInt &Amt,
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SDValue &Lo, SDValue &Hi);
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bool ExpandShiftWithKnownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
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bool ExpandShiftWithUnknownAmountBit(SDNode *N, SDValue &Lo, SDValue &Hi);
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// Integer Operand Expansion.
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bool ExpandIntegerOperand(SDNode *N, unsigned OperandNo);
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SDValue ExpandIntOp_BITCAST(SDNode *N);
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SDValue ExpandIntOp_BR_CC(SDNode *N);
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SDValue ExpandIntOp_BUILD_VECTOR(SDNode *N);
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SDValue ExpandIntOp_EXTRACT_ELEMENT(SDNode *N);
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SDValue ExpandIntOp_SELECT_CC(SDNode *N);
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SDValue ExpandIntOp_SETCC(SDNode *N);
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SDValue ExpandIntOp_Shift(SDNode *N);
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SDValue ExpandIntOp_SINT_TO_FP(SDNode *N);
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SDValue ExpandIntOp_STORE(StoreSDNode *N, unsigned OpNo);
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SDValue ExpandIntOp_TRUNCATE(SDNode *N);
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SDValue ExpandIntOp_UINT_TO_FP(SDNode *N);
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SDValue ExpandIntOp_RETURNADDR(SDNode *N);
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SDValue ExpandIntOp_ATOMIC_STORE(SDNode *N);
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void IntegerExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
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ISD::CondCode &CCCode, SDLoc dl);
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//===--------------------------------------------------------------------===//
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// Float to Integer Conversion Support: LegalizeFloatTypes.cpp
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//===--------------------------------------------------------------------===//
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/// GetSoftenedFloat - Given a processed operand Op which was converted to an
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/// integer of the same size, this returns the integer. The integer contains
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/// exactly the same bits as Op - only the type changed. For example, if Op
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/// is an f32 which was softened to an i32, then this method returns an i32,
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/// the bits of which coincide with those of Op.
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SDValue GetSoftenedFloat(SDValue Op) {
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SDValue &SoftenedOp = SoftenedFloats[Op];
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RemapValue(SoftenedOp);
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assert(SoftenedOp.getNode() && "Operand wasn't converted to integer?");
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void SetSoftenedFloat(SDValue Op, SDValue Result);
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// Result Float to Integer Conversion.
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void SoftenFloatResult(SDNode *N, unsigned OpNo);
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SDValue SoftenFloatRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
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SDValue SoftenFloatRes_BITCAST(SDNode *N);
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SDValue SoftenFloatRes_BUILD_PAIR(SDNode *N);
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SDValue SoftenFloatRes_ConstantFP(ConstantFPSDNode *N);
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SDValue SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N);
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SDValue SoftenFloatRes_FABS(SDNode *N);
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SDValue SoftenFloatRes_FMINNUM(SDNode *N);
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SDValue SoftenFloatRes_FMAXNUM(SDNode *N);
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SDValue SoftenFloatRes_FADD(SDNode *N);
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SDValue SoftenFloatRes_FCEIL(SDNode *N);
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SDValue SoftenFloatRes_FCOPYSIGN(SDNode *N);
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SDValue SoftenFloatRes_FCOS(SDNode *N);
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SDValue SoftenFloatRes_FDIV(SDNode *N);
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SDValue SoftenFloatRes_FEXP(SDNode *N);
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SDValue SoftenFloatRes_FEXP2(SDNode *N);
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SDValue SoftenFloatRes_FFLOOR(SDNode *N);
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SDValue SoftenFloatRes_FLOG(SDNode *N);
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SDValue SoftenFloatRes_FLOG2(SDNode *N);
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SDValue SoftenFloatRes_FLOG10(SDNode *N);
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SDValue SoftenFloatRes_FMA(SDNode *N);
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SDValue SoftenFloatRes_FMUL(SDNode *N);
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SDValue SoftenFloatRes_FNEARBYINT(SDNode *N);
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SDValue SoftenFloatRes_FNEG(SDNode *N);
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SDValue SoftenFloatRes_FP_EXTEND(SDNode *N);
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SDValue SoftenFloatRes_FP16_TO_FP(SDNode *N);
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SDValue SoftenFloatRes_FP_ROUND(SDNode *N);
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SDValue SoftenFloatRes_FPOW(SDNode *N);
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SDValue SoftenFloatRes_FPOWI(SDNode *N);
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SDValue SoftenFloatRes_FREM(SDNode *N);
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SDValue SoftenFloatRes_FRINT(SDNode *N);
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SDValue SoftenFloatRes_FROUND(SDNode *N);
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SDValue SoftenFloatRes_FSIN(SDNode *N);
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SDValue SoftenFloatRes_FSQRT(SDNode *N);
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SDValue SoftenFloatRes_FSUB(SDNode *N);
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SDValue SoftenFloatRes_FTRUNC(SDNode *N);
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SDValue SoftenFloatRes_LOAD(SDNode *N);
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SDValue SoftenFloatRes_SELECT(SDNode *N);
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SDValue SoftenFloatRes_SELECT_CC(SDNode *N);
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SDValue SoftenFloatRes_UNDEF(SDNode *N);
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SDValue SoftenFloatRes_VAARG(SDNode *N);
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SDValue SoftenFloatRes_XINT_TO_FP(SDNode *N);
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// Operand Float to Integer Conversion.
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bool SoftenFloatOperand(SDNode *N, unsigned OpNo);
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SDValue SoftenFloatOp_BITCAST(SDNode *N);
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SDValue SoftenFloatOp_BR_CC(SDNode *N);
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SDValue SoftenFloatOp_FP_EXTEND(SDNode *N);
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SDValue SoftenFloatOp_FP_ROUND(SDNode *N);
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SDValue SoftenFloatOp_FP_TO_SINT(SDNode *N);
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SDValue SoftenFloatOp_FP_TO_UINT(SDNode *N);
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SDValue SoftenFloatOp_SELECT_CC(SDNode *N);
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SDValue SoftenFloatOp_SETCC(SDNode *N);
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SDValue SoftenFloatOp_STORE(SDNode *N, unsigned OpNo);
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//===--------------------------------------------------------------------===//
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// Float Expansion Support: LegalizeFloatTypes.cpp
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//===--------------------------------------------------------------------===//
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/// GetExpandedFloat - Given a processed operand Op which was expanded into
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/// two floating point values of half the size, this returns the two halves.
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/// The low bits of Op are exactly equal to the bits of Lo; the high bits
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/// exactly equal Hi. For example, if Op is a ppcf128 which was expanded
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/// into two f64's, then this method returns the two f64's, with Lo being
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/// equal to the lower 64 bits of Op, and Hi to the upper 64 bits.
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void GetExpandedFloat(SDValue Op, SDValue &Lo, SDValue &Hi);
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void SetExpandedFloat(SDValue Op, SDValue Lo, SDValue Hi);
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// Float Result Expansion.
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void ExpandFloatResult(SDNode *N, unsigned ResNo);
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void ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FABS (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FMINNUM (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FMAXNUM (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FADD (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FCEIL (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FCOPYSIGN (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FCOS (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FDIV (SDNode *N, SDValue &Lo, SDValue &Hi);
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void ExpandFloatRes_FEXP (SDNode *N, SDValue &Lo, SDValue &Hi);
472
void ExpandFloatRes_FEXP2 (SDNode *N, SDValue &Lo, SDValue &Hi);
473
void ExpandFloatRes_FFLOOR (SDNode *N, SDValue &Lo, SDValue &Hi);
474
void ExpandFloatRes_FLOG (SDNode *N, SDValue &Lo, SDValue &Hi);
475
void ExpandFloatRes_FLOG2 (SDNode *N, SDValue &Lo, SDValue &Hi);
476
void ExpandFloatRes_FLOG10 (SDNode *N, SDValue &Lo, SDValue &Hi);
477
void ExpandFloatRes_FMA (SDNode *N, SDValue &Lo, SDValue &Hi);
478
void ExpandFloatRes_FMUL (SDNode *N, SDValue &Lo, SDValue &Hi);
479
void ExpandFloatRes_FNEARBYINT(SDNode *N, SDValue &Lo, SDValue &Hi);
480
void ExpandFloatRes_FNEG (SDNode *N, SDValue &Lo, SDValue &Hi);
481
void ExpandFloatRes_FP_EXTEND (SDNode *N, SDValue &Lo, SDValue &Hi);
482
void ExpandFloatRes_FPOW (SDNode *N, SDValue &Lo, SDValue &Hi);
483
void ExpandFloatRes_FPOWI (SDNode *N, SDValue &Lo, SDValue &Hi);
484
void ExpandFloatRes_FREM (SDNode *N, SDValue &Lo, SDValue &Hi);
485
void ExpandFloatRes_FRINT (SDNode *N, SDValue &Lo, SDValue &Hi);
486
void ExpandFloatRes_FROUND (SDNode *N, SDValue &Lo, SDValue &Hi);
487
void ExpandFloatRes_FSIN (SDNode *N, SDValue &Lo, SDValue &Hi);
488
void ExpandFloatRes_FSQRT (SDNode *N, SDValue &Lo, SDValue &Hi);
489
void ExpandFloatRes_FSUB (SDNode *N, SDValue &Lo, SDValue &Hi);
490
void ExpandFloatRes_FTRUNC (SDNode *N, SDValue &Lo, SDValue &Hi);
491
void ExpandFloatRes_LOAD (SDNode *N, SDValue &Lo, SDValue &Hi);
492
void ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo, SDValue &Hi);
494
// Float Operand Expansion.
495
bool ExpandFloatOperand(SDNode *N, unsigned OperandNo);
496
SDValue ExpandFloatOp_BR_CC(SDNode *N);
497
SDValue ExpandFloatOp_FCOPYSIGN(SDNode *N);
498
SDValue ExpandFloatOp_FP_ROUND(SDNode *N);
499
SDValue ExpandFloatOp_FP_TO_SINT(SDNode *N);
500
SDValue ExpandFloatOp_FP_TO_UINT(SDNode *N);
501
SDValue ExpandFloatOp_SELECT_CC(SDNode *N);
502
SDValue ExpandFloatOp_SETCC(SDNode *N);
503
SDValue ExpandFloatOp_STORE(SDNode *N, unsigned OpNo);
505
void FloatExpandSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
506
ISD::CondCode &CCCode, SDLoc dl);
509
//===--------------------------------------------------------------------===//
510
// Float promotion support: LegalizeFloatTypes.cpp
511
//===--------------------------------------------------------------------===//
513
SDValue GetPromotedFloat(SDValue Op) {
514
SDValue &PromotedOp = PromotedFloats[Op];
515
RemapValue(PromotedOp);
516
assert(PromotedOp.getNode() && "Operand wasn't promoted?");
519
void SetPromotedFloat(SDValue Op, SDValue Result);
521
void PromoteFloatResult(SDNode *N, unsigned ResNo);
522
SDValue PromoteFloatRes_BITCAST(SDNode *N);
523
SDValue PromoteFloatRes_BinOp(SDNode *N);
524
SDValue PromoteFloatRes_ConstantFP(SDNode *N);
525
SDValue PromoteFloatRes_EXTRACT_VECTOR_ELT(SDNode *N);
526
SDValue PromoteFloatRes_FCOPYSIGN(SDNode *N);
527
SDValue PromoteFloatRes_FMAD(SDNode *N);
528
SDValue PromoteFloatRes_FPOWI(SDNode *N);
529
SDValue PromoteFloatRes_FP_ROUND(SDNode *N);
530
SDValue PromoteFloatRes_LOAD(SDNode *N);
531
SDValue PromoteFloatRes_SELECT(SDNode *N);
532
SDValue PromoteFloatRes_SELECT_CC(SDNode *N);
533
SDValue PromoteFloatRes_UnaryOp(SDNode *N);
534
SDValue PromoteFloatRes_UNDEF(SDNode *N);
535
SDValue PromoteFloatRes_XINT_TO_FP(SDNode *N);
537
bool PromoteFloatOperand(SDNode *N, unsigned ResNo);
538
SDValue PromoteFloatOp_BITCAST(SDNode *N, unsigned OpNo);
539
SDValue PromoteFloatOp_FCOPYSIGN(SDNode *N, unsigned OpNo);
540
SDValue PromoteFloatOp_FP_EXTEND(SDNode *N, unsigned OpNo);
541
SDValue PromoteFloatOp_FP_TO_XINT(SDNode *N, unsigned OpNo);
542
SDValue PromoteFloatOp_STORE(SDNode *N, unsigned OpNo);
543
SDValue PromoteFloatOp_SELECT_CC(SDNode *N, unsigned OpNo);
544
SDValue PromoteFloatOp_SETCC(SDNode *N, unsigned OpNo);
546
//===--------------------------------------------------------------------===//
547
// Scalarization Support: LegalizeVectorTypes.cpp
548
//===--------------------------------------------------------------------===//
550
/// GetScalarizedVector - Given a processed one-element vector Op which was
551
/// scalarized to its element type, this returns the element. For example,
552
/// if Op is a v1i32, Op = < i32 val >, this method returns val, an i32.
553
SDValue GetScalarizedVector(SDValue Op) {
554
SDValue &ScalarizedOp = ScalarizedVectors[Op];
555
RemapValue(ScalarizedOp);
556
assert(ScalarizedOp.getNode() && "Operand wasn't scalarized?");
559
void SetScalarizedVector(SDValue Op, SDValue Result);
561
// Vector Result Scalarization: <1 x ty> -> ty.
562
void ScalarizeVectorResult(SDNode *N, unsigned OpNo);
563
SDValue ScalarizeVecRes_MERGE_VALUES(SDNode *N, unsigned ResNo);
564
SDValue ScalarizeVecRes_BinOp(SDNode *N);
565
SDValue ScalarizeVecRes_TernaryOp(SDNode *N);
566
SDValue ScalarizeVecRes_UnaryOp(SDNode *N);
567
SDValue ScalarizeVecRes_InregOp(SDNode *N);
569
SDValue ScalarizeVecRes_BITCAST(SDNode *N);
570
SDValue ScalarizeVecRes_BUILD_VECTOR(SDNode *N);
571
SDValue ScalarizeVecRes_CONVERT_RNDSAT(SDNode *N);
572
SDValue ScalarizeVecRes_EXTRACT_SUBVECTOR(SDNode *N);
573
SDValue ScalarizeVecRes_FP_ROUND(SDNode *N);
574
SDValue ScalarizeVecRes_FPOWI(SDNode *N);
575
SDValue ScalarizeVecRes_INSERT_VECTOR_ELT(SDNode *N);
576
SDValue ScalarizeVecRes_LOAD(LoadSDNode *N);
577
SDValue ScalarizeVecRes_SCALAR_TO_VECTOR(SDNode *N);
578
SDValue ScalarizeVecRes_SIGN_EXTEND_INREG(SDNode *N);
579
SDValue ScalarizeVecRes_VSELECT(SDNode *N);
580
SDValue ScalarizeVecRes_SELECT(SDNode *N);
581
SDValue ScalarizeVecRes_SELECT_CC(SDNode *N);
582
SDValue ScalarizeVecRes_SETCC(SDNode *N);
583
SDValue ScalarizeVecRes_UNDEF(SDNode *N);
584
SDValue ScalarizeVecRes_VECTOR_SHUFFLE(SDNode *N);
585
SDValue ScalarizeVecRes_VSETCC(SDNode *N);
587
// Vector Operand Scalarization: <1 x ty> -> ty.
588
bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
589
SDValue ScalarizeVecOp_BITCAST(SDNode *N);
590
SDValue ScalarizeVecOp_UnaryOp(SDNode *N);
591
SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
592
SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
593
SDValue ScalarizeVecOp_VSELECT(SDNode *N);
594
SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);
595
SDValue ScalarizeVecOp_FP_ROUND(SDNode *N, unsigned OpNo);
597
//===--------------------------------------------------------------------===//
598
// Vector Splitting Support: LegalizeVectorTypes.cpp
599
//===--------------------------------------------------------------------===//
601
/// GetSplitVector - Given a processed vector Op which was split into vectors
602
/// of half the size, this method returns the halves. The first elements of
603
/// Op coincide with the elements of Lo; the remaining elements of Op coincide
604
/// with the elements of Hi: Op is what you would get by concatenating Lo and
605
/// Hi. For example, if Op is a v8i32 that was split into two v4i32's, then
606
/// this method returns the two v4i32's, with Lo corresponding to the first 4
607
/// elements of Op, and Hi to the last 4 elements.
608
void GetSplitVector(SDValue Op, SDValue &Lo, SDValue &Hi);
609
void SetSplitVector(SDValue Op, SDValue Lo, SDValue Hi);
611
// Vector Result Splitting: <128 x ty> -> 2 x <64 x ty>.
612
void SplitVectorResult(SDNode *N, unsigned OpNo);
613
void SplitVecRes_BinOp(SDNode *N, SDValue &Lo, SDValue &Hi);
614
void SplitVecRes_TernaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
615
void SplitVecRes_UnaryOp(SDNode *N, SDValue &Lo, SDValue &Hi);
616
void SplitVecRes_ExtendOp(SDNode *N, SDValue &Lo, SDValue &Hi);
617
void SplitVecRes_InregOp(SDNode *N, SDValue &Lo, SDValue &Hi);
619
void SplitVecRes_BITCAST(SDNode *N, SDValue &Lo, SDValue &Hi);
620
void SplitVecRes_BUILD_PAIR(SDNode *N, SDValue &Lo, SDValue &Hi);
621
void SplitVecRes_BUILD_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
622
void SplitVecRes_CONCAT_VECTORS(SDNode *N, SDValue &Lo, SDValue &Hi);
623
void SplitVecRes_EXTRACT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
624
void SplitVecRes_INSERT_SUBVECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
625
void SplitVecRes_FPOWI(SDNode *N, SDValue &Lo, SDValue &Hi);
626
void SplitVecRes_INSERT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
627
void SplitVecRes_LOAD(LoadSDNode *N, SDValue &Lo, SDValue &Hi);
628
void SplitVecRes_MLOAD(MaskedLoadSDNode *N, SDValue &Lo, SDValue &Hi);
629
void SplitVecRes_MGATHER(MaskedGatherSDNode *N, SDValue &Lo, SDValue &Hi);
630
void SplitVecRes_SCALAR_TO_VECTOR(SDNode *N, SDValue &Lo, SDValue &Hi);
631
void SplitVecRes_SIGN_EXTEND_INREG(SDNode *N, SDValue &Lo, SDValue &Hi);
632
void SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi);
633
void SplitVecRes_UNDEF(SDNode *N, SDValue &Lo, SDValue &Hi);
634
void SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N, SDValue &Lo,
637
// Vector Operand Splitting: <128 x ty> -> 2 x <64 x ty>.
638
bool SplitVectorOperand(SDNode *N, unsigned OpNo);
639
SDValue SplitVecOp_VSELECT(SDNode *N, unsigned OpNo);
640
SDValue SplitVecOp_UnaryOp(SDNode *N);
641
SDValue SplitVecOp_TruncateHelper(SDNode *N);
643
SDValue SplitVecOp_BITCAST(SDNode *N);
644
SDValue SplitVecOp_EXTRACT_SUBVECTOR(SDNode *N);
645
SDValue SplitVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
646
SDValue SplitVecOp_STORE(StoreSDNode *N, unsigned OpNo);
647
SDValue SplitVecOp_MSTORE(MaskedStoreSDNode *N, unsigned OpNo);
648
SDValue SplitVecOp_MSCATTER(MaskedScatterSDNode *N, unsigned OpNo);
649
SDValue SplitVecOp_MGATHER(MaskedGatherSDNode *N, unsigned OpNo);
650
SDValue SplitVecOp_CONCAT_VECTORS(SDNode *N);
651
SDValue SplitVecOp_VSETCC(SDNode *N);
652
SDValue SplitVecOp_FP_ROUND(SDNode *N);
654
//===--------------------------------------------------------------------===//
655
// Vector Widening Support: LegalizeVectorTypes.cpp
656
//===--------------------------------------------------------------------===//
658
/// GetWidenedVector - Given a processed vector Op which was widened into a
659
/// larger vector, this method returns the larger vector. The elements of
660
/// the returned vector consist of the elements of Op followed by elements
661
/// containing rubbish. For example, if Op is a v2i32 that was widened to a
662
/// v4i32, then this method returns a v4i32 for which the first two elements
663
/// are the same as those of Op, while the last two elements contain rubbish.
664
SDValue GetWidenedVector(SDValue Op) {
665
SDValue &WidenedOp = WidenedVectors[Op];
666
RemapValue(WidenedOp);
667
assert(WidenedOp.getNode() && "Operand wasn't widened?");
670
void SetWidenedVector(SDValue Op, SDValue Result);
672
// Widen Vector Result Promotion.
673
void WidenVectorResult(SDNode *N, unsigned ResNo);
674
SDValue WidenVecRes_MERGE_VALUES(SDNode* N, unsigned ResNo);
675
SDValue WidenVecRes_BITCAST(SDNode* N);
676
SDValue WidenVecRes_BUILD_VECTOR(SDNode* N);
677
SDValue WidenVecRes_CONCAT_VECTORS(SDNode* N);
678
SDValue WidenVecRes_CONVERT_RNDSAT(SDNode* N);
679
SDValue WidenVecRes_EXTRACT_SUBVECTOR(SDNode* N);
680
SDValue WidenVecRes_INSERT_VECTOR_ELT(SDNode* N);
681
SDValue WidenVecRes_LOAD(SDNode* N);
682
SDValue WidenVecRes_MLOAD(MaskedLoadSDNode* N);
683
SDValue WidenVecRes_SCALAR_TO_VECTOR(SDNode* N);
684
SDValue WidenVecRes_SIGN_EXTEND_INREG(SDNode* N);
685
SDValue WidenVecRes_SELECT(SDNode* N);
686
SDValue WidenVecRes_SELECT_CC(SDNode* N);
687
SDValue WidenVecRes_SETCC(SDNode* N);
688
SDValue WidenVecRes_UNDEF(SDNode *N);
689
SDValue WidenVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N);
690
SDValue WidenVecRes_VSETCC(SDNode* N);
692
SDValue WidenVecRes_Ternary(SDNode *N);
693
SDValue WidenVecRes_Binary(SDNode *N);
694
SDValue WidenVecRes_BinaryCanTrap(SDNode *N);
695
SDValue WidenVecRes_Convert(SDNode *N);
696
SDValue WidenVecRes_POWI(SDNode *N);
697
SDValue WidenVecRes_Shift(SDNode *N);
698
SDValue WidenVecRes_Unary(SDNode *N);
699
SDValue WidenVecRes_InregOp(SDNode *N);
701
// Widen Vector Operand.
702
bool WidenVectorOperand(SDNode *N, unsigned OpNo);
703
SDValue WidenVecOp_BITCAST(SDNode *N);
704
SDValue WidenVecOp_CONCAT_VECTORS(SDNode *N);
705
SDValue WidenVecOp_EXTEND(SDNode *N);
706
SDValue WidenVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
707
SDValue WidenVecOp_EXTRACT_SUBVECTOR(SDNode *N);
708
SDValue WidenVecOp_STORE(SDNode* N);
709
SDValue WidenVecOp_MSTORE(SDNode* N, unsigned OpNo);
710
SDValue WidenVecOp_SETCC(SDNode* N);
712
SDValue WidenVecOp_Convert(SDNode *N);
714
//===--------------------------------------------------------------------===//
715
// Vector Widening Utilities Support: LegalizeVectorTypes.cpp
716
//===--------------------------------------------------------------------===//
718
/// Helper GenWidenVectorLoads - Helper function to generate a set of
719
/// loads to load a vector with a resulting wider type. It takes
720
/// LdChain: list of chains for the load to be generated.
721
/// Ld: load to widen
722
SDValue GenWidenVectorLoads(SmallVectorImpl<SDValue> &LdChain,
725
/// GenWidenVectorExtLoads - Helper function to generate a set of extension
726
/// loads to load a ector with a resulting wider type. It takes
727
/// LdChain: list of chains for the load to be generated.
728
/// Ld: load to widen
729
/// ExtType: extension element type
730
SDValue GenWidenVectorExtLoads(SmallVectorImpl<SDValue> &LdChain,
731
LoadSDNode *LD, ISD::LoadExtType ExtType);
733
/// Helper genWidenVectorStores - Helper function to generate a set of
734
/// stores to store a widen vector into non-widen memory
735
/// StChain: list of chains for the stores we have generated
736
/// ST: store of a widen value
737
void GenWidenVectorStores(SmallVectorImpl<SDValue> &StChain, StoreSDNode *ST);
739
/// Helper genWidenVectorTruncStores - Helper function to generate a set of
740
/// stores to store a truncate widen vector into non-widen memory
741
/// StChain: list of chains for the stores we have generated
742
/// ST: store of a widen value
743
void GenWidenVectorTruncStores(SmallVectorImpl<SDValue> &StChain,
746
/// Modifies a vector input (widen or narrows) to a vector of NVT. The
747
/// input vector must have the same element type as NVT.
748
SDValue ModifyToType(SDValue InOp, EVT WidenVT);
751
//===--------------------------------------------------------------------===//
752
// Generic Splitting: LegalizeTypesGeneric.cpp
753
//===--------------------------------------------------------------------===//
755
// Legalization methods which only use that the illegal type is split into two
756
// not necessarily identical types. As such they can be used for splitting
757
// vectors and expanding integers and floats.
759
void GetSplitOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
760
if (Op.getValueType().isVector())
761
GetSplitVector(Op, Lo, Hi);
762
else if (Op.getValueType().isInteger())
763
GetExpandedInteger(Op, Lo, Hi);
765
GetExpandedFloat(Op, Lo, Hi);
768
/// GetPairElements - Use ISD::EXTRACT_ELEMENT nodes to extract the low and
769
/// high parts of the given value.
770
void GetPairElements(SDValue Pair, SDValue &Lo, SDValue &Hi);
772
// Generic Result Splitting.
773
void SplitRes_MERGE_VALUES(SDNode *N, unsigned ResNo,
774
SDValue &Lo, SDValue &Hi);
775
void SplitRes_SELECT (SDNode *N, SDValue &Lo, SDValue &Hi);
776
void SplitRes_SELECT_CC (SDNode *N, SDValue &Lo, SDValue &Hi);
777
void SplitRes_UNDEF (SDNode *N, SDValue &Lo, SDValue &Hi);
779
//===--------------------------------------------------------------------===//
780
// Generic Expansion: LegalizeTypesGeneric.cpp
781
//===--------------------------------------------------------------------===//
783
// Legalization methods which only use that the illegal type is split into two
784
// identical types of half the size, and that the Lo/Hi part is stored first
785
// in memory on little/big-endian machines, followed by the Hi/Lo part. As
786
// such they can be used for expanding integers and floats.
788
void GetExpandedOp(SDValue Op, SDValue &Lo, SDValue &Hi) {
789
if (Op.getValueType().isInteger())
790
GetExpandedInteger(Op, Lo, Hi);
792
GetExpandedFloat(Op, Lo, Hi);
796
/// This function will split the integer \p Op into \p NumElements
797
/// operations of type \p EltVT and store them in \p Ops.
798
void IntegerToVector(SDValue Op, unsigned NumElements,
799
SmallVectorImpl<SDValue> &Ops, EVT EltVT);
801
// Generic Result Expansion.
802
void ExpandRes_MERGE_VALUES (SDNode *N, unsigned ResNo,
803
SDValue &Lo, SDValue &Hi);
804
void ExpandRes_BITCAST (SDNode *N, SDValue &Lo, SDValue &Hi);
805
void ExpandRes_BUILD_PAIR (SDNode *N, SDValue &Lo, SDValue &Hi);
806
void ExpandRes_EXTRACT_ELEMENT (SDNode *N, SDValue &Lo, SDValue &Hi);
807
void ExpandRes_EXTRACT_VECTOR_ELT(SDNode *N, SDValue &Lo, SDValue &Hi);
808
void ExpandRes_NormalLoad (SDNode *N, SDValue &Lo, SDValue &Hi);
809
void ExpandRes_VAARG (SDNode *N, SDValue &Lo, SDValue &Hi);
811
// Generic Operand Expansion.
812
SDValue ExpandOp_BITCAST (SDNode *N);
813
SDValue ExpandOp_BUILD_VECTOR (SDNode *N);
814
SDValue ExpandOp_EXTRACT_ELEMENT (SDNode *N);
815
SDValue ExpandOp_INSERT_VECTOR_ELT(SDNode *N);
816
SDValue ExpandOp_SCALAR_TO_VECTOR (SDNode *N);
817
SDValue ExpandOp_NormalStore (SDNode *N, unsigned OpNo);
820
} // end namespace llvm.