//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
#ifndef DAGISEL_EMITTER_H
#define DAGISEL_EMITTER_H
-#include "TableGenBackend.h"
-#include "CodeGenTarget.h"
+#include "llvm/TableGen/TableGenBackend.h"
+#include "CodeGenDAGPatterns.h"
namespace llvm {
- class Record;
- struct Init;
- class ListInit;
- class DagInit;
- class SDNodeInfo;
- class TreePattern;
- class TreePatternNode;
- class DAGISelEmitter;
-
- /// SDTypeConstraint - This is a discriminated union of constraints,
- /// corresponding to the SDTypeConstraint tablegen class in Target.td.
- struct SDTypeConstraint {
- SDTypeConstraint(Record *R);
-
- unsigned OperandNo; // The operand # this constraint applies to.
- enum {
- SDTCisVT, SDTCisInt, SDTCisFP, SDTCisSameAs, SDTCisVTSmallerThanOp
- } ConstraintType;
-
- union { // The discriminated union.
- struct {
- MVT::ValueType VT;
- } SDTCisVT_Info;
- struct {
- unsigned OtherOperandNum;
- } SDTCisSameAs_Info;
- struct {
- unsigned OtherOperandNum;
- } SDTCisVTSmallerThanOp_Info;
- } x;
- /// ApplyTypeConstraint - Given a node in a pattern, apply this type
- /// constraint to the nodes operands. This returns true if it makes a
- /// change, false otherwise. If a type contradiction is found, throw an
- /// exception.
- bool ApplyTypeConstraint(TreePatternNode *N, const SDNodeInfo &NodeInfo,
- TreePattern &TP) const;
-
- /// getOperandNum - Return the node corresponding to operand #OpNo in tree
- /// N, which has NumResults results.
- TreePatternNode *getOperandNum(unsigned OpNo, TreePatternNode *N,
- unsigned NumResults) const;
- };
-
- /// SDNodeInfo - One of these records is created for each SDNode instance in
- /// the target .td file. This represents the various dag nodes we will be
- /// processing.
- class SDNodeInfo {
- Record *Def;
- std::string EnumName;
- std::string SDClassName;
- unsigned Properties;
- unsigned NumResults;
- int NumOperands;
- std::vector<SDTypeConstraint> TypeConstraints;
- public:
- SDNodeInfo(Record *R); // Parse the specified record.
-
- unsigned getNumResults() const { return NumResults; }
- int getNumOperands() const { return NumOperands; }
- Record *getRecord() const { return Def; }
- const std::string &getEnumName() const { return EnumName; }
- const std::string &getSDClassName() const { return SDClassName; }
-
- const std::vector<SDTypeConstraint> &getTypeConstraints() const {
- return TypeConstraints;
- }
-
- // SelectionDAG node properties.
- enum SDNP { SDNPCommutative, SDNPAssociative };
-
- /// hasProperty - Return true if this node has the specified property.
- ///
- bool hasProperty(enum SDNP Prop) const { return Properties & (1 << Prop); }
-
- /// ApplyTypeConstraints - Given a node in a pattern, apply the type
- /// constraints for this node to the operands of the node. This returns
- /// true if it makes a change, false otherwise. If a type contradiction is
- /// found, throw an exception.
- bool ApplyTypeConstraints(TreePatternNode *N, TreePattern &TP) const {
- bool MadeChange = false;
- for (unsigned i = 0, e = TypeConstraints.size(); i != e; ++i)
- MadeChange |= TypeConstraints[i].ApplyTypeConstraint(N, *this, TP);
- return MadeChange;
- }
- };
-
- /// FIXME: TreePatternNode's can be shared in some cases (due to dag-shaped
- /// patterns), and as such should be ref counted. We currently just leak all
- /// TreePatternNode objects!
- class TreePatternNode {
- /// The inferred type for this node, or MVT::LAST_VALUETYPE if it hasn't
- /// been determined yet.
- MVT::ValueType Ty;
-
- /// Operator - The Record for the operator if this is an interior node (not
- /// a leaf).
- Record *Operator;
-
- /// Val - The init value (e.g. the "GPRC" record, or "7") for a leaf.
- ///
- Init *Val;
-
- /// Name - The name given to this node with the :$foo notation.
- ///
- std::string Name;
-
- /// PredicateFn - The predicate function to execute on this node to check
- /// for a match. If this string is empty, no predicate is involved.
- std::string PredicateFn;
-
- /// TransformFn - The transformation function to execute on this node before
- /// it can be substituted into the resulting instruction on a pattern match.
- Record *TransformFn;
-
- std::vector<TreePatternNode*> Children;
- public:
- TreePatternNode(Record *Op, const std::vector<TreePatternNode*> &Ch)
- : Ty(MVT::LAST_VALUETYPE), Operator(Op), Val(0), TransformFn(0),
- Children(Ch) {}
- TreePatternNode(Init *val) // leaf ctor
- : Ty(MVT::LAST_VALUETYPE), Operator(0), Val(val), TransformFn(0) {}
- ~TreePatternNode();
-
- const std::string &getName() const { return Name; }
- void setName(const std::string &N) { Name = N; }
-
- bool isLeaf() const { return Val != 0; }
- bool hasTypeSet() const { return Ty != MVT::LAST_VALUETYPE; }
- MVT::ValueType getType() const { return Ty; }
- void setType(MVT::ValueType VT) { Ty = VT; }
-
- Init *getLeafValue() const { assert(isLeaf()); return Val; }
- Record *getOperator() const { assert(!isLeaf()); return Operator; }
-
- unsigned getNumChildren() const { return Children.size(); }
- TreePatternNode *getChild(unsigned N) const { return Children[N]; }
- void setChild(unsigned i, TreePatternNode *N) {
- Children[i] = N;
- }
-
- const std::string &getPredicateFn() const { return PredicateFn; }
- void setPredicateFn(const std::string &Fn) { PredicateFn = Fn; }
-
- Record *getTransformFn() const { return TransformFn; }
- void setTransformFn(Record *Fn) { TransformFn = Fn; }
-
- void print(std::ostream &OS) const;
- void dump() const;
-
- public: // Higher level manipulation routines.
-
- /// clone - Return a new copy of this tree.
- ///
- TreePatternNode *clone() const;
-
- /// isIsomorphicTo - Return true if this node is recursively isomorphic to
- /// the specified node. For this comparison, all of the state of the node
- /// is considered, except for the assigned name. Nodes with differing names
- /// that are otherwise identical are considered isomorphic.
- bool isIsomorphicTo(const TreePatternNode *N) const;
-
- /// SubstituteFormalArguments - Replace the formal arguments in this tree
- /// with actual values specified by ArgMap.
- void SubstituteFormalArguments(std::map<std::string,
- TreePatternNode*> &ArgMap);
-
- /// InlinePatternFragments - If this pattern refers to any pattern
- /// fragments, inline them into place, giving us a pattern without any
- /// PatFrag references.
- TreePatternNode *InlinePatternFragments(TreePattern &TP);
-
- /// ApplyTypeConstraints - Apply all of the type constraints relevent to
- /// this node and its children in the tree. This returns true if it makes a
- /// change, false otherwise. If a type contradiction is found, throw an
- /// exception.
- bool ApplyTypeConstraints(TreePattern &TP);
-
- /// UpdateNodeType - Set the node type of N to VT if VT contains
- /// information. If N already contains a conflicting type, then throw an
- /// exception. This returns true if any information was updated.
- ///
- bool UpdateNodeType(MVT::ValueType VT, TreePattern &TP);
-
- /// ContainsUnresolvedType - Return true if this tree contains any
- /// unresolved types.
- bool ContainsUnresolvedType() const {
- if (Ty == MVT::LAST_VALUETYPE) 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, DAGISelEmitter &ISE);
- };
-
-
- /// 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;
-
- /// 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;
-
- /// ISE - the DAG isel emitter coordinating this madness.
- ///
- DAGISelEmitter &ISE;
- public:
-
- /// TreePattern constructor - Parse the specified DagInits into the
- /// current record.
- TreePattern(Record *TheRec, ListInit *RawPat, DAGISelEmitter &ise);
- TreePattern(Record *TheRec, DagInit *Pat, DAGISelEmitter &ise);
- TreePattern(Record *TheRec, TreePatternNode *Pat, DAGISelEmitter &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];
- }
-
- /// 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; }
-
- DAGISelEmitter &getDAGISelEmitter() const { return ISE; }
-
- /// 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 infered, false
- /// otherwise. Throw an exception if a type contradiction is found.
- bool InferAllTypes();
-
- /// error - Throw an exception, prefixing it with information about this
- /// pattern.
- void error(const std::string &Msg) const;
-
- void print(std::ostream &OS) const;
- void dump() const;
-
- private:
- MVT::ValueType getIntrinsicType(Record *R) const;
- TreePatternNode *ParseTreePattern(DagInit *DI);
- };
-
-
- class DAGInstruction {
- TreePattern *Pattern;
- unsigned NumResults;
- unsigned NumOperands;
- std::vector<MVT::ValueType> ResultTypes;
- std::vector<MVT::ValueType> OperandTypes;
- TreePatternNode *ResultPattern;
- public:
- DAGInstruction(TreePattern *TP,
- const std::vector<MVT::ValueType> &resultTypes,
- const std::vector<MVT::ValueType> &operandTypes)
- : Pattern(TP), ResultTypes(resultTypes), OperandTypes(operandTypes),
- ResultPattern(0) {}
-
- TreePattern *getPattern() const { return Pattern; }
- unsigned getNumResults() const { return ResultTypes.size(); }
- unsigned getNumOperands() const { return OperandTypes.size(); }
-
- void setResultPattern(TreePatternNode *R) { ResultPattern = R; }
-
- MVT::ValueType getResultType(unsigned RN) const {
- assert(RN < ResultTypes.size());
- return ResultTypes[RN];
- }
-
- MVT::ValueType getOperandType(unsigned ON) const {
- assert(ON < OperandTypes.size());
- return OperandTypes[ON];
- }
- TreePatternNode *getResultPattern() const { return ResultPattern; }
- };
-
-
-/// InstrSelectorEmitter - The top-level class which coordinates construction
+/// DAGISelEmitter - The top-level class which coordinates construction
/// and emission of the instruction selector.
///
class DAGISelEmitter : public TableGenBackend {
-public:
- typedef std::pair<TreePatternNode*, TreePatternNode*> PatternToMatch;
-private:
RecordKeeper &Records;
- CodeGenTarget Target;
-
- std::map<Record*, SDNodeInfo> SDNodes;
- std::map<Record*, std::pair<Record*, std::string> > SDNodeXForms;
- std::map<Record*, TreePattern*> PatternFragments;
- std::map<Record*, DAGInstruction> Instructions;
-
- /// 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;
+ CodeGenDAGPatterns CGP;
public:
- DAGISelEmitter(RecordKeeper &R) : Records(R) {}
+ explicit DAGISelEmitter(RecordKeeper &R) : Records(R), CGP(R) {}
// run - Output the isel, returning true on failure.
- void run(std::ostream &OS);
-
- const SDNodeInfo &getSDNodeInfo(Record *R) const {
- assert(SDNodes.count(R) && "Unknown node!");
- return SDNodes.find(R)->second;
- }
-
- TreePattern *getPatternFragment(Record *R) const {
- assert(PatternFragments.count(R) && "Invalid pattern fragment request!");
- return PatternFragments.find(R)->second;
- }
-
- const std::pair<Record*, std::string> &getSDNodeTransform(Record *R) const {
- assert(SDNodeXForms.count(R) && "Invalid transform!");
- return SDNodeXForms.find(R)->second;
- }
-
- const DAGInstruction &getInstruction(Record *R) const {
- assert(Instructions.count(R) && "Unknown instruction!");
- return Instructions.find(R)->second;
- }
-
-private:
- void ParseNodeInfo();
- void ParseNodeTransforms(std::ostream &OS);
- void ParsePatternFragments(std::ostream &OS);
- void ParseInstructions();
- void ParsePatterns();
- void GenerateVariants();
- void FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
- std::map<std::string,
- TreePatternNode*> &InstInputs,
- std::map<std::string, Record*> &InstResults);
- void EmitMatchForPattern(TreePatternNode *N, const std::string &RootName,
- std::map<std::string,std::string> &VarMap,
- unsigned PatternNo, std::ostream &OS);
- unsigned CodeGenPatternResult(TreePatternNode *N, unsigned &Ctr,
- std::map<std::string,std::string> &VariableMap,
- std::ostream &OS);
- void EmitCodeForPattern(PatternToMatch &Pattern, std::ostream &OS);
- void EmitInstructionSelector(std::ostream &OS);
+ void run(raw_ostream &OS);
};
} // End llvm namespace