867 lines
32 KiB
C++
867 lines
32 KiB
C++
//===- CodeGenDAGPatterns.h - Read DAG patterns from .td file ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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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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//===----------------------------------------------------------------------===//
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//
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// This file declares the CodeGenDAGPatterns class, which is used to read and
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// represent the patterns present in a .td file for instructions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_TABLEGEN_CODEGENDAGPATTERNS_H
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#define LLVM_UTILS_TABLEGEN_CODEGENDAGPATTERNS_H
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#include "CodeGenIntrinsics.h"
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#include "CodeGenTarget.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/Support/ErrorHandling.h"
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#include <algorithm>
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#include <map>
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#include <set>
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#include <vector>
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namespace llvm {
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class Record;
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class Init;
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class ListInit;
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class DagInit;
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class SDNodeInfo;
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class TreePattern;
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class TreePatternNode;
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class CodeGenDAGPatterns;
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class ComplexPattern;
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/// EEVT::DAGISelGenValueType - These are some extended forms of
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/// MVT::SimpleValueType that we use as lattice values during type inference.
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/// The existing MVT iAny, fAny and vAny types suffice to represent
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/// arbitrary integer, floating-point, and vector types, so only an unknown
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/// value is needed.
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namespace EEVT {
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/// TypeSet - This is either empty if it's completely unknown, or holds a set
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/// of types. It is used during type inference because register classes can
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/// have multiple possible types and we don't know which one they get until
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/// type inference is complete.
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///
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/// TypeSet can have three states:
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/// Vector is empty: The type is completely unknown, it can be any valid
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/// target type.
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/// Vector has multiple constrained types: (e.g. v4i32 + v4f32) it is one
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/// of those types only.
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/// Vector has one concrete type: The type is completely known.
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///
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class TypeSet {
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SmallVector<MVT::SimpleValueType, 4> TypeVec;
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public:
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TypeSet() {}
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TypeSet(MVT::SimpleValueType VT, TreePattern &TP);
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TypeSet(ArrayRef<MVT::SimpleValueType> VTList);
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bool isCompletelyUnknown() const { return TypeVec.empty(); }
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bool isConcrete() const {
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if (TypeVec.size() != 1) return false;
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unsigned char T = TypeVec[0]; (void)T;
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assert(T < MVT::LAST_VALUETYPE || T == MVT::iPTR || T == MVT::iPTRAny);
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return true;
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}
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MVT::SimpleValueType getConcrete() const {
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assert(isConcrete() && "Type isn't concrete yet");
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return (MVT::SimpleValueType)TypeVec[0];
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}
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bool isDynamicallyResolved() const {
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return getConcrete() == MVT::iPTR || getConcrete() == MVT::iPTRAny;
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}
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const SmallVectorImpl<MVT::SimpleValueType> &getTypeList() const {
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assert(!TypeVec.empty() && "Not a type list!");
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return TypeVec;
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}
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bool isVoid() const {
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return TypeVec.size() == 1 && TypeVec[0] == MVT::isVoid;
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}
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/// hasIntegerTypes - Return true if this TypeSet contains any integer value
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/// types.
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bool hasIntegerTypes() const;
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/// hasFloatingPointTypes - Return true if this TypeSet contains an fAny or
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/// a floating point value type.
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bool hasFloatingPointTypes() const;
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/// hasScalarTypes - Return true if this TypeSet contains a scalar value
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/// type.
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bool hasScalarTypes() const;
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/// hasVectorTypes - Return true if this TypeSet contains a vector value
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/// type.
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bool hasVectorTypes() const;
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/// getName() - Return this TypeSet as a string.
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std::string getName() const;
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/// MergeInTypeInfo - This merges in type information from the specified
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/// argument. If 'this' changes, it returns true. If the two types are
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/// contradictory (e.g. merge f32 into i32) then this flags an error.
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bool MergeInTypeInfo(const EEVT::TypeSet &InVT, TreePattern &TP);
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bool MergeInTypeInfo(MVT::SimpleValueType InVT, TreePattern &TP) {
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return MergeInTypeInfo(EEVT::TypeSet(InVT, TP), TP);
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}
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/// Force this type list to only contain integer types.
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bool EnforceInteger(TreePattern &TP);
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/// Force this type list to only contain floating point types.
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bool EnforceFloatingPoint(TreePattern &TP);
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/// EnforceScalar - Remove all vector types from this type list.
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bool EnforceScalar(TreePattern &TP);
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/// EnforceVector - Remove all non-vector types from this type list.
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bool EnforceVector(TreePattern &TP);
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/// EnforceSmallerThan - 'this' must be a smaller VT than Other. Update
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/// this an other based on this information.
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bool EnforceSmallerThan(EEVT::TypeSet &Other, TreePattern &TP);
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/// EnforceVectorEltTypeIs - 'this' is now constrained to be a vector type
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/// whose element is VT.
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bool EnforceVectorEltTypeIs(EEVT::TypeSet &VT, TreePattern &TP);
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/// EnforceVectorEltTypeIs - 'this' is now constrained to be a vector type
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/// whose element is VT.
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bool EnforceVectorEltTypeIs(MVT::SimpleValueType VT, TreePattern &TP);
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/// EnforceVectorSubVectorTypeIs - 'this' is now constrained to
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/// be a vector type VT.
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bool EnforceVectorSubVectorTypeIs(EEVT::TypeSet &VT, TreePattern &TP);
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/// EnforceSameNumElts - If VTOperand is a scalar, then 'this' is a scalar.
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/// If VTOperand is a vector, then 'this' must have the same number of
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/// elements.
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bool EnforceSameNumElts(EEVT::TypeSet &VT, TreePattern &TP);
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/// EnforceSameSize - 'this' is now constrained to be the same size as VT.
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bool EnforceSameSize(EEVT::TypeSet &VT, TreePattern &TP);
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bool operator!=(const TypeSet &RHS) const { return TypeVec != RHS.TypeVec; }
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bool operator==(const TypeSet &RHS) const { return TypeVec == RHS.TypeVec; }
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private:
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/// FillWithPossibleTypes - Set to all legal types and return true, only
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/// valid on completely unknown type sets. If Pred is non-null, only MVTs
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/// that pass the predicate are added.
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bool FillWithPossibleTypes(TreePattern &TP,
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bool (*Pred)(MVT::SimpleValueType) = nullptr,
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const char *PredicateName = nullptr);
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};
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}
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/// Set type used to track multiply used variables in patterns
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typedef std::set<std::string> MultipleUseVarSet;
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/// SDTypeConstraint - This is a discriminated union of constraints,
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/// corresponding to the SDTypeConstraint tablegen class in Target.td.
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struct SDTypeConstraint {
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SDTypeConstraint(Record *R);
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unsigned OperandNo; // The operand # this constraint applies to.
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enum {
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SDTCisVT, SDTCisPtrTy, SDTCisInt, SDTCisFP, SDTCisVec, SDTCisSameAs,
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SDTCisVTSmallerThanOp, SDTCisOpSmallerThanOp, SDTCisEltOfVec,
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SDTCisSubVecOfVec, SDTCVecEltisVT, SDTCisSameNumEltsAs, SDTCisSameSizeAs
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} ConstraintType;
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union { // The discriminated union.
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struct {
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MVT::SimpleValueType VT;
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} SDTCisVT_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisSameAs_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisVTSmallerThanOp_Info;
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struct {
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unsigned BigOperandNum;
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} SDTCisOpSmallerThanOp_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisEltOfVec_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisSubVecOfVec_Info;
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struct {
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MVT::SimpleValueType VT;
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} SDTCVecEltisVT_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisSameNumEltsAs_Info;
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struct {
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unsigned OtherOperandNum;
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} SDTCisSameSizeAs_Info;
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} x;
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/// ApplyTypeConstraint - Given a node in a pattern, apply this type
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/// constraint to the nodes operands. This returns true if it makes a
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/// change, false otherwise. If a type contradiction is found, an error
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/// is flagged.
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bool ApplyTypeConstraint(TreePatternNode *N, const SDNodeInfo &NodeInfo,
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TreePattern &TP) const;
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};
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/// SDNodeInfo - One of these records is created for each SDNode instance in
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/// the target .td file. This represents the various dag nodes we will be
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/// processing.
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class SDNodeInfo {
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Record *Def;
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StringRef EnumName;
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StringRef SDClassName;
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unsigned Properties;
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unsigned NumResults;
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int NumOperands;
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std::vector<SDTypeConstraint> TypeConstraints;
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public:
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SDNodeInfo(Record *R); // Parse the specified record.
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unsigned getNumResults() const { return NumResults; }
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/// getNumOperands - This is the number of operands required or -1 if
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/// variadic.
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int getNumOperands() const { return NumOperands; }
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Record *getRecord() const { return Def; }
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StringRef getEnumName() const { return EnumName; }
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StringRef getSDClassName() const { return SDClassName; }
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const std::vector<SDTypeConstraint> &getTypeConstraints() const {
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return TypeConstraints;
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}
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/// getKnownType - If the type constraints on this node imply a fixed type
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/// (e.g. all stores return void, etc), then return it as an
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/// MVT::SimpleValueType. Otherwise, return MVT::Other.
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MVT::SimpleValueType getKnownType(unsigned ResNo) const;
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/// hasProperty - Return true if this node has the specified property.
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///
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bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
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/// ApplyTypeConstraints - Given a node in a pattern, apply the type
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/// constraints for this node to the operands of the node. This returns
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/// true if it makes a change, false otherwise. If a type contradiction is
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/// found, an error is flagged.
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bool ApplyTypeConstraints(TreePatternNode *N, TreePattern &TP) const {
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bool MadeChange = false;
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for (unsigned i = 0, e = TypeConstraints.size(); i != e; ++i)
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MadeChange |= TypeConstraints[i].ApplyTypeConstraint(N, *this, TP);
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return MadeChange;
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}
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};
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/// TreePredicateFn - This is an abstraction that represents the predicates on
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/// a PatFrag node. This is a simple one-word wrapper around a pointer to
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/// provide nice accessors.
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class TreePredicateFn {
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/// PatFragRec - This is the TreePattern for the PatFrag that we
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/// originally came from.
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TreePattern *PatFragRec;
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public:
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/// TreePredicateFn constructor. Here 'N' is a subclass of PatFrag.
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TreePredicateFn(TreePattern *N);
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TreePattern *getOrigPatFragRecord() const { return PatFragRec; }
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/// isAlwaysTrue - Return true if this is a noop predicate.
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bool isAlwaysTrue() const;
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bool isImmediatePattern() const { return !getImmCode().empty(); }
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/// getImmediatePredicateCode - Return the code that evaluates this pattern if
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/// this is an immediate predicate. It is an error to call this on a
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/// non-immediate pattern.
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std::string getImmediatePredicateCode() const {
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std::string Result = getImmCode();
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assert(!Result.empty() && "Isn't an immediate pattern!");
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return Result;
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}
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bool operator==(const TreePredicateFn &RHS) const {
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return PatFragRec == RHS.PatFragRec;
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}
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bool operator!=(const TreePredicateFn &RHS) const { return !(*this == RHS); }
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/// Return the name to use in the generated code to reference this, this is
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/// "Predicate_foo" if from a pattern fragment "foo".
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std::string getFnName() const;
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/// getCodeToRunOnSDNode - Return the code for the function body that
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/// evaluates this predicate. The argument is expected to be in "Node",
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/// not N. This handles casting and conversion to a concrete node type as
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/// appropriate.
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std::string getCodeToRunOnSDNode() const;
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private:
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std::string getPredCode() const;
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std::string getImmCode() const;
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};
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/// FIXME: TreePatternNode's can be shared in some cases (due to dag-shaped
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/// patterns), and as such should be ref counted. We currently just leak all
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/// TreePatternNode objects!
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class TreePatternNode {
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/// The type of each node result. Before and during type inference, each
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/// result may be a set of possible types. After (successful) type inference,
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/// each is a single concrete type.
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SmallVector<EEVT::TypeSet, 1> Types;
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/// Operator - The Record for the operator if this is an interior node (not
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/// a leaf).
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Record *Operator;
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/// Val - The init value (e.g. the "GPRC" record, or "7") for a leaf.
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///
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Init *Val;
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/// Name - The name given to this node with the :$foo notation.
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///
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std::string Name;
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/// PredicateFns - The predicate functions to execute on this node to check
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/// for a match. If this list is empty, no predicate is involved.
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std::vector<TreePredicateFn> PredicateFns;
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/// TransformFn - The transformation function to execute on this node before
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/// it can be substituted into the resulting instruction on a pattern match.
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Record *TransformFn;
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std::vector<TreePatternNode*> Children;
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public:
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TreePatternNode(Record *Op, const std::vector<TreePatternNode*> &Ch,
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unsigned NumResults)
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: Operator(Op), Val(nullptr), TransformFn(nullptr), Children(Ch) {
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Types.resize(NumResults);
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}
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TreePatternNode(Init *val, unsigned NumResults) // leaf ctor
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: Operator(nullptr), Val(val), TransformFn(nullptr) {
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Types.resize(NumResults);
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}
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~TreePatternNode();
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bool hasName() const { return !Name.empty(); }
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const std::string &getName() const { return Name; }
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void setName(StringRef N) { Name.assign(N.begin(), N.end()); }
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bool isLeaf() const { return Val != nullptr; }
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// Type accessors.
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unsigned getNumTypes() const { return Types.size(); }
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MVT::SimpleValueType getType(unsigned ResNo) const {
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return Types[ResNo].getConcrete();
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}
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const SmallVectorImpl<EEVT::TypeSet> &getExtTypes() const { return Types; }
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const EEVT::TypeSet &getExtType(unsigned ResNo) const { return Types[ResNo]; }
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EEVT::TypeSet &getExtType(unsigned ResNo) { return Types[ResNo]; }
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void setType(unsigned ResNo, const EEVT::TypeSet &T) { Types[ResNo] = T; }
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bool hasTypeSet(unsigned ResNo) const {
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return Types[ResNo].isConcrete();
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}
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bool isTypeCompletelyUnknown(unsigned ResNo) const {
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return Types[ResNo].isCompletelyUnknown();
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}
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bool isTypeDynamicallyResolved(unsigned ResNo) const {
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return Types[ResNo].isDynamicallyResolved();
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}
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Init *getLeafValue() const { assert(isLeaf()); return Val; }
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Record *getOperator() const { assert(!isLeaf()); return Operator; }
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unsigned getNumChildren() const { return Children.size(); }
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TreePatternNode *getChild(unsigned N) const { return Children[N]; }
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void setChild(unsigned i, TreePatternNode *N) {
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Children[i] = N;
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}
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/// hasChild - Return true if N is any of our children.
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bool hasChild(const TreePatternNode *N) const {
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for (unsigned i = 0, e = Children.size(); i != e; ++i)
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if (Children[i] == N) return true;
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return false;
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}
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bool hasAnyPredicate() const { return !PredicateFns.empty(); }
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const std::vector<TreePredicateFn> &getPredicateFns() const {
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return PredicateFns;
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}
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void clearPredicateFns() { PredicateFns.clear(); }
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void setPredicateFns(const std::vector<TreePredicateFn> &Fns) {
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assert(PredicateFns.empty() && "Overwriting non-empty predicate list!");
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PredicateFns = Fns;
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}
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void addPredicateFn(const TreePredicateFn &Fn) {
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assert(!Fn.isAlwaysTrue() && "Empty predicate string!");
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if (!is_contained(PredicateFns, Fn))
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PredicateFns.push_back(Fn);
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}
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Record *getTransformFn() const { return TransformFn; }
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void setTransformFn(Record *Fn) { TransformFn = Fn; }
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/// getIntrinsicInfo - If this node corresponds to an intrinsic, return the
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/// CodeGenIntrinsic information for it, otherwise return a null pointer.
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const CodeGenIntrinsic *getIntrinsicInfo(const CodeGenDAGPatterns &CDP) const;
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/// getComplexPatternInfo - If this node corresponds to a ComplexPattern,
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/// return the ComplexPattern information, otherwise return null.
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const ComplexPattern *
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getComplexPatternInfo(const CodeGenDAGPatterns &CGP) const;
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/// Returns the number of MachineInstr operands that would be produced by this
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/// node if it mapped directly to an output Instruction's
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/// operand. ComplexPattern specifies this explicitly; MIOperandInfo gives it
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/// for Operands; otherwise 1.
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unsigned getNumMIResults(const CodeGenDAGPatterns &CGP) const;
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/// NodeHasProperty - Return true if this node has the specified property.
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bool NodeHasProperty(SDNP Property, const CodeGenDAGPatterns &CGP) const;
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/// TreeHasProperty - Return true if any node in this tree has the specified
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/// property.
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bool TreeHasProperty(SDNP Property, const CodeGenDAGPatterns &CGP) const;
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/// isCommutativeIntrinsic - Return true if the node is an intrinsic which is
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/// marked isCommutative.
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bool isCommutativeIntrinsic(const CodeGenDAGPatterns &CDP) const;
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void print(raw_ostream &OS) const;
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void dump() const;
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public: // Higher level manipulation routines.
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/// clone - Return a new copy of this tree.
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///
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TreePatternNode *clone() const;
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/// RemoveAllTypes - Recursively strip all the types of this tree.
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void RemoveAllTypes();
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/// isIsomorphicTo - Return true if this node is recursively isomorphic to
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/// the specified node. For this comparison, all of the state of the node
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/// is considered, except for the assigned name. Nodes with differing names
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/// that are otherwise identical are considered isomorphic.
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bool isIsomorphicTo(const TreePatternNode *N,
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const MultipleUseVarSet &DepVars) const;
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/// SubstituteFormalArguments - Replace the formal arguments in this tree
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/// with actual values specified by ArgMap.
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void SubstituteFormalArguments(std::map<std::string,
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TreePatternNode*> &ArgMap);
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/// InlinePatternFragments - If this pattern refers to any pattern
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/// fragments, inline them into place, giving us a pattern without any
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/// PatFrag references.
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TreePatternNode *InlinePatternFragments(TreePattern &TP);
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/// ApplyTypeConstraints - Apply all of the type constraints relevant to
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/// this node and its children in the tree. This returns true if it makes a
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/// change, false otherwise. If a type contradiction is found, flag an error.
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bool ApplyTypeConstraints(TreePattern &TP, bool NotRegisters);
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/// UpdateNodeType - Set the node type of N to VT if VT contains
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/// information. If N already contains a conflicting type, then flag an
|
|
/// error. This returns true if any information was updated.
|
|
///
|
|
bool UpdateNodeType(unsigned ResNo, const EEVT::TypeSet &InTy,
|
|
TreePattern &TP) {
|
|
return Types[ResNo].MergeInTypeInfo(InTy, TP);
|
|
}
|
|
|
|
bool UpdateNodeType(unsigned ResNo, MVT::SimpleValueType InTy,
|
|
TreePattern &TP) {
|
|
return Types[ResNo].MergeInTypeInfo(EEVT::TypeSet(InTy, TP), TP);
|
|
}
|
|
|
|
// Update node type with types inferred from an instruction operand or result
|
|
// def from the ins/outs lists.
|
|
// Return true if the type changed.
|
|
bool UpdateNodeTypeFromInst(unsigned ResNo, Record *Operand, TreePattern &TP);
|
|
|
|
/// ContainsUnresolvedType - Return true if this tree contains any
|
|
/// unresolved types.
|
|
bool ContainsUnresolvedType() const {
|
|
for (unsigned i = 0, e = Types.size(); i != e; ++i)
|
|
if (!Types[i].isConcrete()) return true;
|
|
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
|
|
if (getChild(i)->ContainsUnresolvedType()) return true;
|
|
return false;
|
|
}
|
|
|
|
/// canPatternMatch - If it is impossible for this pattern to match on this
|
|
/// target, fill in Reason and return false. Otherwise, return true.
|
|
bool canPatternMatch(std::string &Reason, const CodeGenDAGPatterns &CDP);
|
|
};
|
|
|
|
inline raw_ostream &operator<<(raw_ostream &OS, const TreePatternNode &TPN) {
|
|
TPN.print(OS);
|
|
return OS;
|
|
}
|
|
|
|
|
|
/// TreePattern - Represent a pattern, used for instructions, pattern
|
|
/// fragments, etc.
|
|
///
|
|
class TreePattern {
|
|
/// Trees - The list of pattern trees which corresponds to this pattern.
|
|
/// Note that PatFrag's only have a single tree.
|
|
///
|
|
std::vector<TreePatternNode*> Trees;
|
|
|
|
/// NamedNodes - This is all of the nodes that have names in the trees in this
|
|
/// pattern.
|
|
StringMap<SmallVector<TreePatternNode*,1> > NamedNodes;
|
|
|
|
/// TheRecord - The actual TableGen record corresponding to this pattern.
|
|
///
|
|
Record *TheRecord;
|
|
|
|
/// Args - This is a list of all of the arguments to this pattern (for
|
|
/// PatFrag patterns), which are the 'node' markers in this pattern.
|
|
std::vector<std::string> Args;
|
|
|
|
/// CDP - the top-level object coordinating this madness.
|
|
///
|
|
CodeGenDAGPatterns &CDP;
|
|
|
|
/// isInputPattern - True if this is an input pattern, something to match.
|
|
/// False if this is an output pattern, something to emit.
|
|
bool isInputPattern;
|
|
|
|
/// hasError - True if the currently processed nodes have unresolvable types
|
|
/// or other non-fatal errors
|
|
bool HasError;
|
|
|
|
/// It's important that the usage of operands in ComplexPatterns is
|
|
/// consistent: each named operand can be defined by at most one
|
|
/// ComplexPattern. This records the ComplexPattern instance and the operand
|
|
/// number for each operand encountered in a ComplexPattern to aid in that
|
|
/// check.
|
|
StringMap<std::pair<Record *, unsigned>> ComplexPatternOperands;
|
|
public:
|
|
|
|
/// TreePattern constructor - Parse the specified DagInits into the
|
|
/// current record.
|
|
TreePattern(Record *TheRec, ListInit *RawPat, bool isInput,
|
|
CodeGenDAGPatterns &ise);
|
|
TreePattern(Record *TheRec, DagInit *Pat, bool isInput,
|
|
CodeGenDAGPatterns &ise);
|
|
TreePattern(Record *TheRec, TreePatternNode *Pat, bool isInput,
|
|
CodeGenDAGPatterns &ise);
|
|
|
|
/// getTrees - Return the tree patterns which corresponds to this pattern.
|
|
///
|
|
const std::vector<TreePatternNode*> &getTrees() const { return Trees; }
|
|
unsigned getNumTrees() const { return Trees.size(); }
|
|
TreePatternNode *getTree(unsigned i) const { return Trees[i]; }
|
|
TreePatternNode *getOnlyTree() const {
|
|
assert(Trees.size() == 1 && "Doesn't have exactly one pattern!");
|
|
return Trees[0];
|
|
}
|
|
|
|
const StringMap<SmallVector<TreePatternNode*,1> > &getNamedNodesMap() {
|
|
if (NamedNodes.empty())
|
|
ComputeNamedNodes();
|
|
return NamedNodes;
|
|
}
|
|
|
|
/// getRecord - Return the actual TableGen record corresponding to this
|
|
/// pattern.
|
|
///
|
|
Record *getRecord() const { return TheRecord; }
|
|
|
|
unsigned getNumArgs() const { return Args.size(); }
|
|
const std::string &getArgName(unsigned i) const {
|
|
assert(i < Args.size() && "Argument reference out of range!");
|
|
return Args[i];
|
|
}
|
|
std::vector<std::string> &getArgList() { return Args; }
|
|
|
|
CodeGenDAGPatterns &getDAGPatterns() const { return CDP; }
|
|
|
|
/// InlinePatternFragments - If this pattern refers to any pattern
|
|
/// fragments, inline them into place, giving us a pattern without any
|
|
/// PatFrag references.
|
|
void InlinePatternFragments() {
|
|
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
|
|
Trees[i] = Trees[i]->InlinePatternFragments(*this);
|
|
}
|
|
|
|
/// InferAllTypes - Infer/propagate as many types throughout the expression
|
|
/// patterns as possible. Return true if all types are inferred, false
|
|
/// otherwise. Bail out if a type contradiction is found.
|
|
bool InferAllTypes(const StringMap<SmallVector<TreePatternNode*,1> >
|
|
*NamedTypes=nullptr);
|
|
|
|
/// error - If this is the first error in the current resolution step,
|
|
/// print it and set the error flag. Otherwise, continue silently.
|
|
void error(const Twine &Msg);
|
|
bool hasError() const {
|
|
return HasError;
|
|
}
|
|
void resetError() {
|
|
HasError = false;
|
|
}
|
|
|
|
void print(raw_ostream &OS) const;
|
|
void dump() const;
|
|
|
|
private:
|
|
TreePatternNode *ParseTreePattern(Init *DI, StringRef OpName);
|
|
void ComputeNamedNodes();
|
|
void ComputeNamedNodes(TreePatternNode *N);
|
|
};
|
|
|
|
/// DAGDefaultOperand - One of these is created for each OperandWithDefaultOps
|
|
/// that has a set ExecuteAlways / DefaultOps field.
|
|
struct DAGDefaultOperand {
|
|
std::vector<TreePatternNode*> DefaultOps;
|
|
};
|
|
|
|
class DAGInstruction {
|
|
TreePattern *Pattern;
|
|
std::vector<Record*> Results;
|
|
std::vector<Record*> Operands;
|
|
std::vector<Record*> ImpResults;
|
|
TreePatternNode *ResultPattern;
|
|
public:
|
|
DAGInstruction(TreePattern *TP,
|
|
const std::vector<Record*> &results,
|
|
const std::vector<Record*> &operands,
|
|
const std::vector<Record*> &impresults)
|
|
: Pattern(TP), Results(results), Operands(operands),
|
|
ImpResults(impresults), ResultPattern(nullptr) {}
|
|
|
|
TreePattern *getPattern() const { return Pattern; }
|
|
unsigned getNumResults() const { return Results.size(); }
|
|
unsigned getNumOperands() const { return Operands.size(); }
|
|
unsigned getNumImpResults() const { return ImpResults.size(); }
|
|
const std::vector<Record*>& getImpResults() const { return ImpResults; }
|
|
|
|
void setResultPattern(TreePatternNode *R) { ResultPattern = R; }
|
|
|
|
Record *getResult(unsigned RN) const {
|
|
assert(RN < Results.size());
|
|
return Results[RN];
|
|
}
|
|
|
|
Record *getOperand(unsigned ON) const {
|
|
assert(ON < Operands.size());
|
|
return Operands[ON];
|
|
}
|
|
|
|
Record *getImpResult(unsigned RN) const {
|
|
assert(RN < ImpResults.size());
|
|
return ImpResults[RN];
|
|
}
|
|
|
|
TreePatternNode *getResultPattern() const { return ResultPattern; }
|
|
};
|
|
|
|
/// PatternToMatch - Used by CodeGenDAGPatterns to keep tab of patterns
|
|
/// processed to produce isel.
|
|
class PatternToMatch {
|
|
public:
|
|
PatternToMatch(Record *srcrecord, ListInit *preds, TreePatternNode *src,
|
|
TreePatternNode *dst, std::vector<Record *> dstregs,
|
|
int complexity, unsigned uid)
|
|
: SrcRecord(srcrecord), Predicates(preds), SrcPattern(src),
|
|
DstPattern(dst), Dstregs(std::move(dstregs)),
|
|
AddedComplexity(complexity), ID(uid) {}
|
|
|
|
Record *SrcRecord; // Originating Record for the pattern.
|
|
ListInit *Predicates; // Top level predicate conditions to match.
|
|
TreePatternNode *SrcPattern; // Source pattern to match.
|
|
TreePatternNode *DstPattern; // Resulting pattern.
|
|
std::vector<Record*> Dstregs; // Physical register defs being matched.
|
|
int AddedComplexity; // Add to matching pattern complexity.
|
|
unsigned ID; // Unique ID for the record.
|
|
|
|
Record *getSrcRecord() const { return SrcRecord; }
|
|
ListInit *getPredicates() const { return Predicates; }
|
|
TreePatternNode *getSrcPattern() const { return SrcPattern; }
|
|
TreePatternNode *getDstPattern() const { return DstPattern; }
|
|
const std::vector<Record*> &getDstRegs() const { return Dstregs; }
|
|
int getAddedComplexity() const { return AddedComplexity; }
|
|
|
|
std::string getPredicateCheck() const;
|
|
|
|
/// Compute the complexity metric for the input pattern. This roughly
|
|
/// corresponds to the number of nodes that are covered.
|
|
int getPatternComplexity(const CodeGenDAGPatterns &CGP) const;
|
|
};
|
|
|
|
class CodeGenDAGPatterns {
|
|
RecordKeeper &Records;
|
|
CodeGenTarget Target;
|
|
CodeGenIntrinsicTable Intrinsics;
|
|
CodeGenIntrinsicTable TgtIntrinsics;
|
|
|
|
std::map<Record*, SDNodeInfo, LessRecordByID> SDNodes;
|
|
std::map<Record*, std::pair<Record*, std::string>, LessRecordByID> SDNodeXForms;
|
|
std::map<Record*, ComplexPattern, LessRecordByID> ComplexPatterns;
|
|
std::map<Record *, std::unique_ptr<TreePattern>, LessRecordByID>
|
|
PatternFragments;
|
|
std::map<Record*, DAGDefaultOperand, LessRecordByID> DefaultOperands;
|
|
std::map<Record*, DAGInstruction, LessRecordByID> Instructions;
|
|
|
|
// Specific SDNode definitions:
|
|
Record *intrinsic_void_sdnode;
|
|
Record *intrinsic_w_chain_sdnode, *intrinsic_wo_chain_sdnode;
|
|
|
|
/// PatternsToMatch - All of the things we are matching on the DAG. The first
|
|
/// value is the pattern to match, the second pattern is the result to
|
|
/// emit.
|
|
std::vector<PatternToMatch> PatternsToMatch;
|
|
public:
|
|
CodeGenDAGPatterns(RecordKeeper &R);
|
|
|
|
CodeGenTarget &getTargetInfo() { return Target; }
|
|
const CodeGenTarget &getTargetInfo() const { return Target; }
|
|
|
|
Record *getSDNodeNamed(const std::string &Name) const;
|
|
|
|
const SDNodeInfo &getSDNodeInfo(Record *R) const {
|
|
assert(SDNodes.count(R) && "Unknown node!");
|
|
return SDNodes.find(R)->second;
|
|
}
|
|
|
|
// Node transformation lookups.
|
|
typedef std::pair<Record*, std::string> NodeXForm;
|
|
const NodeXForm &getSDNodeTransform(Record *R) const {
|
|
assert(SDNodeXForms.count(R) && "Invalid transform!");
|
|
return SDNodeXForms.find(R)->second;
|
|
}
|
|
|
|
typedef std::map<Record*, NodeXForm, LessRecordByID>::const_iterator
|
|
nx_iterator;
|
|
nx_iterator nx_begin() const { return SDNodeXForms.begin(); }
|
|
nx_iterator nx_end() const { return SDNodeXForms.end(); }
|
|
|
|
|
|
const ComplexPattern &getComplexPattern(Record *R) const {
|
|
assert(ComplexPatterns.count(R) && "Unknown addressing mode!");
|
|
return ComplexPatterns.find(R)->second;
|
|
}
|
|
|
|
const CodeGenIntrinsic &getIntrinsic(Record *R) const {
|
|
for (unsigned i = 0, e = Intrinsics.size(); i != e; ++i)
|
|
if (Intrinsics[i].TheDef == R) return Intrinsics[i];
|
|
for (unsigned i = 0, e = TgtIntrinsics.size(); i != e; ++i)
|
|
if (TgtIntrinsics[i].TheDef == R) return TgtIntrinsics[i];
|
|
llvm_unreachable("Unknown intrinsic!");
|
|
}
|
|
|
|
const CodeGenIntrinsic &getIntrinsicInfo(unsigned IID) const {
|
|
if (IID-1 < Intrinsics.size())
|
|
return Intrinsics[IID-1];
|
|
if (IID-Intrinsics.size()-1 < TgtIntrinsics.size())
|
|
return TgtIntrinsics[IID-Intrinsics.size()-1];
|
|
llvm_unreachable("Bad intrinsic ID!");
|
|
}
|
|
|
|
unsigned getIntrinsicID(Record *R) const {
|
|
for (unsigned i = 0, e = Intrinsics.size(); i != e; ++i)
|
|
if (Intrinsics[i].TheDef == R) return i;
|
|
for (unsigned i = 0, e = TgtIntrinsics.size(); i != e; ++i)
|
|
if (TgtIntrinsics[i].TheDef == R) return i + Intrinsics.size();
|
|
llvm_unreachable("Unknown intrinsic!");
|
|
}
|
|
|
|
const DAGDefaultOperand &getDefaultOperand(Record *R) const {
|
|
assert(DefaultOperands.count(R) &&"Isn't an analyzed default operand!");
|
|
return DefaultOperands.find(R)->second;
|
|
}
|
|
|
|
// Pattern Fragment information.
|
|
TreePattern *getPatternFragment(Record *R) const {
|
|
assert(PatternFragments.count(R) && "Invalid pattern fragment request!");
|
|
return PatternFragments.find(R)->second.get();
|
|
}
|
|
TreePattern *getPatternFragmentIfRead(Record *R) const {
|
|
if (!PatternFragments.count(R))
|
|
return nullptr;
|
|
return PatternFragments.find(R)->second.get();
|
|
}
|
|
|
|
typedef std::map<Record *, std::unique_ptr<TreePattern>,
|
|
LessRecordByID>::const_iterator pf_iterator;
|
|
pf_iterator pf_begin() const { return PatternFragments.begin(); }
|
|
pf_iterator pf_end() const { return PatternFragments.end(); }
|
|
iterator_range<pf_iterator> ptfs() const { return PatternFragments; }
|
|
|
|
// Patterns to match information.
|
|
typedef std::vector<PatternToMatch>::const_iterator ptm_iterator;
|
|
ptm_iterator ptm_begin() const { return PatternsToMatch.begin(); }
|
|
ptm_iterator ptm_end() const { return PatternsToMatch.end(); }
|
|
iterator_range<ptm_iterator> ptms() const { return PatternsToMatch; }
|
|
|
|
/// Parse the Pattern for an instruction, and insert the result in DAGInsts.
|
|
typedef std::map<Record*, DAGInstruction, LessRecordByID> DAGInstMap;
|
|
const DAGInstruction &parseInstructionPattern(
|
|
CodeGenInstruction &CGI, ListInit *Pattern,
|
|
DAGInstMap &DAGInsts);
|
|
|
|
const DAGInstruction &getInstruction(Record *R) const {
|
|
assert(Instructions.count(R) && "Unknown instruction!");
|
|
return Instructions.find(R)->second;
|
|
}
|
|
|
|
Record *get_intrinsic_void_sdnode() const {
|
|
return intrinsic_void_sdnode;
|
|
}
|
|
Record *get_intrinsic_w_chain_sdnode() const {
|
|
return intrinsic_w_chain_sdnode;
|
|
}
|
|
Record *get_intrinsic_wo_chain_sdnode() const {
|
|
return intrinsic_wo_chain_sdnode;
|
|
}
|
|
|
|
bool hasTargetIntrinsics() { return !TgtIntrinsics.empty(); }
|
|
|
|
private:
|
|
void ParseNodeInfo();
|
|
void ParseNodeTransforms();
|
|
void ParseComplexPatterns();
|
|
void ParsePatternFragments(bool OutFrags = false);
|
|
void ParseDefaultOperands();
|
|
void ParseInstructions();
|
|
void ParsePatterns();
|
|
void InferInstructionFlags();
|
|
void GenerateVariants();
|
|
void VerifyInstructionFlags();
|
|
|
|
void AddPatternToMatch(TreePattern *Pattern, PatternToMatch &&PTM);
|
|
void FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
|
|
std::map<std::string,
|
|
TreePatternNode*> &InstInputs,
|
|
std::map<std::string,
|
|
TreePatternNode*> &InstResults,
|
|
std::vector<Record*> &InstImpResults);
|
|
};
|
|
} // end namespace llvm
|
|
|
|
#endif
|