mirror of
https://github.com/c64scene-ar/llvm-6502.git
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9008ca6b6b
PR2957 ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes as the shuffle mask. A value of -1 represents UNDEF. In addition to eliminating the creation of illegal BUILD_VECTORS just to represent shuffle masks, we are better about canonicalizing the shuffle mask, resulting in substantially better code for some classes of shuffles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70225 91177308-0d34-0410-b5e6-96231b3b80d8
2396 lines
92 KiB
C++
2396 lines
92 KiB
C++
//===- CodeGenDAGPatterns.cpp - Read DAG patterns from .td file -----------===//
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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 implements 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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#include "CodeGenDAGPatterns.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/Streams.h"
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#include <set>
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#include <algorithm>
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// Helpers for working with extended types.
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/// FilterVTs - Filter a list of VT's according to a predicate.
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///
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template<typename T>
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static std::vector<MVT::SimpleValueType>
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FilterVTs(const std::vector<MVT::SimpleValueType> &InVTs, T Filter) {
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std::vector<MVT::SimpleValueType> Result;
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for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
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if (Filter(InVTs[i]))
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Result.push_back(InVTs[i]);
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return Result;
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}
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template<typename T>
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static std::vector<unsigned char>
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FilterEVTs(const std::vector<unsigned char> &InVTs, T Filter) {
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std::vector<unsigned char> Result;
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for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
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if (Filter((MVT::SimpleValueType)InVTs[i]))
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Result.push_back(InVTs[i]);
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return Result;
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}
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static std::vector<unsigned char>
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ConvertVTs(const std::vector<MVT::SimpleValueType> &InVTs) {
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std::vector<unsigned char> Result;
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for (unsigned i = 0, e = InVTs.size(); i != e; ++i)
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Result.push_back(InVTs[i]);
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return Result;
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}
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static inline bool isInteger(MVT::SimpleValueType VT) {
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return MVT(VT).isInteger();
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}
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static inline bool isFloatingPoint(MVT::SimpleValueType VT) {
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return MVT(VT).isFloatingPoint();
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}
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static inline bool isVector(MVT::SimpleValueType VT) {
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return MVT(VT).isVector();
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}
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static bool LHSIsSubsetOfRHS(const std::vector<unsigned char> &LHS,
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const std::vector<unsigned char> &RHS) {
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if (LHS.size() > RHS.size()) return false;
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for (unsigned i = 0, e = LHS.size(); i != e; ++i)
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if (std::find(RHS.begin(), RHS.end(), LHS[i]) == RHS.end())
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return false;
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return true;
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}
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namespace llvm {
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namespace EMVT {
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/// isExtIntegerInVTs - Return true if the specified extended value type vector
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/// contains isInt or an integer value type.
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bool isExtIntegerInVTs(const std::vector<unsigned char> &EVTs) {
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assert(!EVTs.empty() && "Cannot check for integer in empty ExtVT list!");
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return EVTs[0] == isInt || !(FilterEVTs(EVTs, isInteger).empty());
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}
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/// isExtFloatingPointInVTs - Return true if the specified extended value type
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/// vector contains isFP or a FP value type.
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bool isExtFloatingPointInVTs(const std::vector<unsigned char> &EVTs) {
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assert(!EVTs.empty() && "Cannot check for integer in empty ExtVT list!");
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return EVTs[0] == isFP || !(FilterEVTs(EVTs, isFloatingPoint).empty());
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}
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} // end namespace EMVT.
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} // end namespace llvm.
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/// Dependent variable map for CodeGenDAGPattern variant generation
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typedef std::map<std::string, int> DepVarMap;
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/// Const iterator shorthand for DepVarMap
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typedef DepVarMap::const_iterator DepVarMap_citer;
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namespace {
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void FindDepVarsOf(TreePatternNode *N, DepVarMap &DepMap) {
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if (N->isLeaf()) {
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if (dynamic_cast<DefInit*>(N->getLeafValue()) != NULL) {
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DepMap[N->getName()]++;
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}
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} else {
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for (size_t i = 0, e = N->getNumChildren(); i != e; ++i)
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FindDepVarsOf(N->getChild(i), DepMap);
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}
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}
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//! Find dependent variables within child patterns
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/*!
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*/
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void FindDepVars(TreePatternNode *N, MultipleUseVarSet &DepVars) {
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DepVarMap depcounts;
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FindDepVarsOf(N, depcounts);
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for (DepVarMap_citer i = depcounts.begin(); i != depcounts.end(); ++i) {
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if (i->second > 1) { // std::pair<std::string, int>
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DepVars.insert(i->first);
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}
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}
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}
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//! Dump the dependent variable set:
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void DumpDepVars(MultipleUseVarSet &DepVars) {
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if (DepVars.empty()) {
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DOUT << "<empty set>";
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} else {
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DOUT << "[ ";
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for (MultipleUseVarSet::const_iterator i = DepVars.begin(), e = DepVars.end();
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i != e; ++i) {
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DOUT << (*i) << " ";
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}
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DOUT << "]";
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}
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}
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}
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//===----------------------------------------------------------------------===//
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// PatternToMatch implementation
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//
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/// getPredicateCheck - Return a single string containing all of this
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/// pattern's predicates concatenated with "&&" operators.
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///
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std::string PatternToMatch::getPredicateCheck() const {
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std::string PredicateCheck;
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for (unsigned i = 0, e = Predicates->getSize(); i != e; ++i) {
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if (DefInit *Pred = dynamic_cast<DefInit*>(Predicates->getElement(i))) {
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Record *Def = Pred->getDef();
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if (!Def->isSubClassOf("Predicate")) {
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#ifndef NDEBUG
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Def->dump();
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#endif
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assert(0 && "Unknown predicate type!");
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}
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if (!PredicateCheck.empty())
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PredicateCheck += " && ";
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PredicateCheck += "(" + Def->getValueAsString("CondString") + ")";
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}
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}
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return PredicateCheck;
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}
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//===----------------------------------------------------------------------===//
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// SDTypeConstraint implementation
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//
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SDTypeConstraint::SDTypeConstraint(Record *R) {
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OperandNo = R->getValueAsInt("OperandNum");
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if (R->isSubClassOf("SDTCisVT")) {
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ConstraintType = SDTCisVT;
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x.SDTCisVT_Info.VT = getValueType(R->getValueAsDef("VT"));
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} else if (R->isSubClassOf("SDTCisPtrTy")) {
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ConstraintType = SDTCisPtrTy;
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} else if (R->isSubClassOf("SDTCisInt")) {
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ConstraintType = SDTCisInt;
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} else if (R->isSubClassOf("SDTCisFP")) {
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ConstraintType = SDTCisFP;
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} else if (R->isSubClassOf("SDTCisSameAs")) {
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ConstraintType = SDTCisSameAs;
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x.SDTCisSameAs_Info.OtherOperandNum = R->getValueAsInt("OtherOperandNum");
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} else if (R->isSubClassOf("SDTCisVTSmallerThanOp")) {
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ConstraintType = SDTCisVTSmallerThanOp;
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x.SDTCisVTSmallerThanOp_Info.OtherOperandNum =
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R->getValueAsInt("OtherOperandNum");
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} else if (R->isSubClassOf("SDTCisOpSmallerThanOp")) {
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ConstraintType = SDTCisOpSmallerThanOp;
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x.SDTCisOpSmallerThanOp_Info.BigOperandNum =
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R->getValueAsInt("BigOperandNum");
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} else if (R->isSubClassOf("SDTCisEltOfVec")) {
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ConstraintType = SDTCisEltOfVec;
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x.SDTCisEltOfVec_Info.OtherOperandNum =
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R->getValueAsInt("OtherOpNum");
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} else {
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cerr << "Unrecognized SDTypeConstraint '" << R->getName() << "'!\n";
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exit(1);
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}
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}
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/// getOperandNum - Return the node corresponding to operand #OpNo in tree
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/// N, which has NumResults results.
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TreePatternNode *SDTypeConstraint::getOperandNum(unsigned OpNo,
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TreePatternNode *N,
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unsigned NumResults) const {
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assert(NumResults <= 1 &&
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"We only work with nodes with zero or one result so far!");
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if (OpNo >= (NumResults + N->getNumChildren())) {
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cerr << "Invalid operand number " << OpNo << " ";
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N->dump();
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cerr << '\n';
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exit(1);
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}
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if (OpNo < NumResults)
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return N; // FIXME: need value #
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else
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return N->getChild(OpNo-NumResults);
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}
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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, throw an
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/// exception.
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bool SDTypeConstraint::ApplyTypeConstraint(TreePatternNode *N,
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const SDNodeInfo &NodeInfo,
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TreePattern &TP) const {
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unsigned NumResults = NodeInfo.getNumResults();
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assert(NumResults <= 1 &&
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"We only work with nodes with zero or one result so far!");
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// Check that the number of operands is sane. Negative operands -> varargs.
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if (NodeInfo.getNumOperands() >= 0) {
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if (N->getNumChildren() != (unsigned)NodeInfo.getNumOperands())
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TP.error(N->getOperator()->getName() + " node requires exactly " +
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itostr(NodeInfo.getNumOperands()) + " operands!");
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}
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const CodeGenTarget &CGT = TP.getDAGPatterns().getTargetInfo();
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TreePatternNode *NodeToApply = getOperandNum(OperandNo, N, NumResults);
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switch (ConstraintType) {
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default: assert(0 && "Unknown constraint type!");
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case SDTCisVT:
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// Operand must be a particular type.
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return NodeToApply->UpdateNodeType(x.SDTCisVT_Info.VT, TP);
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case SDTCisPtrTy: {
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// Operand must be same as target pointer type.
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return NodeToApply->UpdateNodeType(MVT::iPTR, TP);
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}
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case SDTCisInt: {
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// If there is only one integer type supported, this must be it.
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std::vector<MVT::SimpleValueType> IntVTs =
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FilterVTs(CGT.getLegalValueTypes(), isInteger);
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// If we found exactly one supported integer type, apply it.
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if (IntVTs.size() == 1)
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return NodeToApply->UpdateNodeType(IntVTs[0], TP);
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return NodeToApply->UpdateNodeType(EMVT::isInt, TP);
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}
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case SDTCisFP: {
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// If there is only one FP type supported, this must be it.
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std::vector<MVT::SimpleValueType> FPVTs =
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FilterVTs(CGT.getLegalValueTypes(), isFloatingPoint);
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// If we found exactly one supported FP type, apply it.
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if (FPVTs.size() == 1)
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return NodeToApply->UpdateNodeType(FPVTs[0], TP);
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return NodeToApply->UpdateNodeType(EMVT::isFP, TP);
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}
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case SDTCisSameAs: {
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TreePatternNode *OtherNode =
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getOperandNum(x.SDTCisSameAs_Info.OtherOperandNum, N, NumResults);
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return NodeToApply->UpdateNodeType(OtherNode->getExtTypes(), TP) |
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OtherNode->UpdateNodeType(NodeToApply->getExtTypes(), TP);
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}
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case SDTCisVTSmallerThanOp: {
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// The NodeToApply must be a leaf node that is a VT. OtherOperandNum must
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// have an integer type that is smaller than the VT.
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if (!NodeToApply->isLeaf() ||
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!dynamic_cast<DefInit*>(NodeToApply->getLeafValue()) ||
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!static_cast<DefInit*>(NodeToApply->getLeafValue())->getDef()
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->isSubClassOf("ValueType"))
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TP.error(N->getOperator()->getName() + " expects a VT operand!");
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MVT::SimpleValueType VT =
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getValueType(static_cast<DefInit*>(NodeToApply->getLeafValue())->getDef());
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if (!isInteger(VT))
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TP.error(N->getOperator()->getName() + " VT operand must be integer!");
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TreePatternNode *OtherNode =
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getOperandNum(x.SDTCisVTSmallerThanOp_Info.OtherOperandNum, N,NumResults);
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// It must be integer.
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bool MadeChange = false;
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MadeChange |= OtherNode->UpdateNodeType(EMVT::isInt, TP);
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// This code only handles nodes that have one type set. Assert here so
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// that we can change this if we ever need to deal with multiple value
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// types at this point.
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assert(OtherNode->getExtTypes().size() == 1 && "Node has too many types!");
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if (OtherNode->hasTypeSet() && OtherNode->getTypeNum(0) <= VT)
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OtherNode->UpdateNodeType(MVT::Other, TP); // Throw an error.
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return false;
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}
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case SDTCisOpSmallerThanOp: {
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TreePatternNode *BigOperand =
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getOperandNum(x.SDTCisOpSmallerThanOp_Info.BigOperandNum, N, NumResults);
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// Both operands must be integer or FP, but we don't care which.
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bool MadeChange = false;
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// This code does not currently handle nodes which have multiple types,
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// where some types are integer, and some are fp. Assert that this is not
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// the case.
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assert(!(EMVT::isExtIntegerInVTs(NodeToApply->getExtTypes()) &&
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EMVT::isExtFloatingPointInVTs(NodeToApply->getExtTypes())) &&
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!(EMVT::isExtIntegerInVTs(BigOperand->getExtTypes()) &&
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EMVT::isExtFloatingPointInVTs(BigOperand->getExtTypes())) &&
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"SDTCisOpSmallerThanOp does not handle mixed int/fp types!");
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if (EMVT::isExtIntegerInVTs(NodeToApply->getExtTypes()))
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MadeChange |= BigOperand->UpdateNodeType(EMVT::isInt, TP);
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else if (EMVT::isExtFloatingPointInVTs(NodeToApply->getExtTypes()))
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MadeChange |= BigOperand->UpdateNodeType(EMVT::isFP, TP);
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if (EMVT::isExtIntegerInVTs(BigOperand->getExtTypes()))
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MadeChange |= NodeToApply->UpdateNodeType(EMVT::isInt, TP);
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else if (EMVT::isExtFloatingPointInVTs(BigOperand->getExtTypes()))
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MadeChange |= NodeToApply->UpdateNodeType(EMVT::isFP, TP);
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std::vector<MVT::SimpleValueType> VTs = CGT.getLegalValueTypes();
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if (EMVT::isExtIntegerInVTs(NodeToApply->getExtTypes())) {
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VTs = FilterVTs(VTs, isInteger);
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} else if (EMVT::isExtFloatingPointInVTs(NodeToApply->getExtTypes())) {
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VTs = FilterVTs(VTs, isFloatingPoint);
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} else {
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VTs.clear();
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}
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switch (VTs.size()) {
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default: // Too many VT's to pick from.
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case 0: break; // No info yet.
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case 1:
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// Only one VT of this flavor. Cannot ever satisfy the constraints.
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return NodeToApply->UpdateNodeType(MVT::Other, TP); // throw
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case 2:
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// If we have exactly two possible types, the little operand must be the
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// small one, the big operand should be the big one. Common with
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// float/double for example.
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assert(VTs[0] < VTs[1] && "Should be sorted!");
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MadeChange |= NodeToApply->UpdateNodeType(VTs[0], TP);
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MadeChange |= BigOperand->UpdateNodeType(VTs[1], TP);
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break;
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}
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return MadeChange;
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}
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case SDTCisEltOfVec: {
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TreePatternNode *OtherOperand =
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getOperandNum(x.SDTCisEltOfVec_Info.OtherOperandNum,
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N, NumResults);
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if (OtherOperand->hasTypeSet()) {
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if (!isVector(OtherOperand->getTypeNum(0)))
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TP.error(N->getOperator()->getName() + " VT operand must be a vector!");
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MVT IVT = OtherOperand->getTypeNum(0);
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IVT = IVT.getVectorElementType();
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return NodeToApply->UpdateNodeType(IVT.getSimpleVT(), TP);
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}
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return false;
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}
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}
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return false;
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}
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//===----------------------------------------------------------------------===//
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// SDNodeInfo implementation
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//
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SDNodeInfo::SDNodeInfo(Record *R) : Def(R) {
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EnumName = R->getValueAsString("Opcode");
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SDClassName = R->getValueAsString("SDClass");
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Record *TypeProfile = R->getValueAsDef("TypeProfile");
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NumResults = TypeProfile->getValueAsInt("NumResults");
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NumOperands = TypeProfile->getValueAsInt("NumOperands");
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// Parse the properties.
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Properties = 0;
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std::vector<Record*> PropList = R->getValueAsListOfDefs("Properties");
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for (unsigned i = 0, e = PropList.size(); i != e; ++i) {
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if (PropList[i]->getName() == "SDNPCommutative") {
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Properties |= 1 << SDNPCommutative;
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} else if (PropList[i]->getName() == "SDNPAssociative") {
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Properties |= 1 << SDNPAssociative;
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} else if (PropList[i]->getName() == "SDNPHasChain") {
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Properties |= 1 << SDNPHasChain;
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} else if (PropList[i]->getName() == "SDNPOutFlag") {
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Properties |= 1 << SDNPOutFlag;
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} else if (PropList[i]->getName() == "SDNPInFlag") {
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Properties |= 1 << SDNPInFlag;
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} else if (PropList[i]->getName() == "SDNPOptInFlag") {
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Properties |= 1 << SDNPOptInFlag;
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} else if (PropList[i]->getName() == "SDNPMayStore") {
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Properties |= 1 << SDNPMayStore;
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} else if (PropList[i]->getName() == "SDNPMayLoad") {
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Properties |= 1 << SDNPMayLoad;
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} else if (PropList[i]->getName() == "SDNPSideEffect") {
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Properties |= 1 << SDNPSideEffect;
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} else if (PropList[i]->getName() == "SDNPMemOperand") {
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Properties |= 1 << SDNPMemOperand;
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} else {
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cerr << "Unknown SD Node property '" << PropList[i]->getName()
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<< "' on node '" << R->getName() << "'!\n";
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exit(1);
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}
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}
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// Parse the type constraints.
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std::vector<Record*> ConstraintList =
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TypeProfile->getValueAsListOfDefs("Constraints");
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TypeConstraints.assign(ConstraintList.begin(), ConstraintList.end());
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}
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//===----------------------------------------------------------------------===//
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// TreePatternNode implementation
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//
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TreePatternNode::~TreePatternNode() {
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#if 0 // FIXME: implement refcounted tree nodes!
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for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
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delete getChild(i);
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#endif
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}
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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 throw an
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/// exception. This returns true if any information was updated.
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///
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bool TreePatternNode::UpdateNodeType(const std::vector<unsigned char> &ExtVTs,
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TreePattern &TP) {
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|
assert(!ExtVTs.empty() && "Cannot update node type with empty type vector!");
|
|
|
|
if (ExtVTs[0] == EMVT::isUnknown || LHSIsSubsetOfRHS(getExtTypes(), ExtVTs))
|
|
return false;
|
|
if (isTypeCompletelyUnknown() || LHSIsSubsetOfRHS(ExtVTs, getExtTypes())) {
|
|
setTypes(ExtVTs);
|
|
return true;
|
|
}
|
|
|
|
if (getExtTypeNum(0) == MVT::iPTR || getExtTypeNum(0) == MVT::iPTRAny) {
|
|
if (ExtVTs[0] == MVT::iPTR || ExtVTs[0] == MVT::iPTRAny ||
|
|
ExtVTs[0] == EMVT::isInt)
|
|
return false;
|
|
if (EMVT::isExtIntegerInVTs(ExtVTs)) {
|
|
std::vector<unsigned char> FVTs = FilterEVTs(ExtVTs, isInteger);
|
|
if (FVTs.size()) {
|
|
setTypes(ExtVTs);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((ExtVTs[0] == EMVT::isInt || ExtVTs[0] == MVT::iAny) &&
|
|
EMVT::isExtIntegerInVTs(getExtTypes())) {
|
|
assert(hasTypeSet() && "should be handled above!");
|
|
std::vector<unsigned char> FVTs = FilterEVTs(getExtTypes(), isInteger);
|
|
if (getExtTypes() == FVTs)
|
|
return false;
|
|
setTypes(FVTs);
|
|
return true;
|
|
}
|
|
if ((ExtVTs[0] == MVT::iPTR || ExtVTs[0] == MVT::iPTRAny) &&
|
|
EMVT::isExtIntegerInVTs(getExtTypes())) {
|
|
//assert(hasTypeSet() && "should be handled above!");
|
|
std::vector<unsigned char> FVTs = FilterEVTs(getExtTypes(), isInteger);
|
|
if (getExtTypes() == FVTs)
|
|
return false;
|
|
if (FVTs.size()) {
|
|
setTypes(FVTs);
|
|
return true;
|
|
}
|
|
}
|
|
if ((ExtVTs[0] == EMVT::isFP || ExtVTs[0] == MVT::fAny) &&
|
|
EMVT::isExtFloatingPointInVTs(getExtTypes())) {
|
|
assert(hasTypeSet() && "should be handled above!");
|
|
std::vector<unsigned char> FVTs =
|
|
FilterEVTs(getExtTypes(), isFloatingPoint);
|
|
if (getExtTypes() == FVTs)
|
|
return false;
|
|
setTypes(FVTs);
|
|
return true;
|
|
}
|
|
|
|
// If we know this is an int or fp type, and we are told it is a specific one,
|
|
// take the advice.
|
|
//
|
|
// Similarly, we should probably set the type here to the intersection of
|
|
// {isInt|isFP} and ExtVTs
|
|
if (((getExtTypeNum(0) == EMVT::isInt || getExtTypeNum(0) == MVT::iAny) &&
|
|
EMVT::isExtIntegerInVTs(ExtVTs)) ||
|
|
((getExtTypeNum(0) == EMVT::isFP || getExtTypeNum(0) == MVT::fAny) &&
|
|
EMVT::isExtFloatingPointInVTs(ExtVTs))) {
|
|
setTypes(ExtVTs);
|
|
return true;
|
|
}
|
|
if (getExtTypeNum(0) == EMVT::isInt &&
|
|
(ExtVTs[0] == MVT::iPTR || ExtVTs[0] == MVT::iPTRAny)) {
|
|
setTypes(ExtVTs);
|
|
return true;
|
|
}
|
|
|
|
if (isLeaf()) {
|
|
dump();
|
|
cerr << " ";
|
|
TP.error("Type inference contradiction found in node!");
|
|
} else {
|
|
TP.error("Type inference contradiction found in node " +
|
|
getOperator()->getName() + "!");
|
|
}
|
|
return true; // unreachable
|
|
}
|
|
|
|
|
|
void TreePatternNode::print(std::ostream &OS) const {
|
|
if (isLeaf()) {
|
|
OS << *getLeafValue();
|
|
} else {
|
|
OS << "(" << getOperator()->getName();
|
|
}
|
|
|
|
// FIXME: At some point we should handle printing all the value types for
|
|
// nodes that are multiply typed.
|
|
switch (getExtTypeNum(0)) {
|
|
case MVT::Other: OS << ":Other"; break;
|
|
case EMVT::isInt: OS << ":isInt"; break;
|
|
case EMVT::isFP : OS << ":isFP"; break;
|
|
case EMVT::isUnknown: ; /*OS << ":?";*/ break;
|
|
case MVT::iPTR: OS << ":iPTR"; break;
|
|
case MVT::iPTRAny: OS << ":iPTRAny"; break;
|
|
default: {
|
|
std::string VTName = llvm::getName(getTypeNum(0));
|
|
// Strip off MVT:: prefix if present.
|
|
if (VTName.substr(0,5) == "MVT::")
|
|
VTName = VTName.substr(5);
|
|
OS << ":" << VTName;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!isLeaf()) {
|
|
if (getNumChildren() != 0) {
|
|
OS << " ";
|
|
getChild(0)->print(OS);
|
|
for (unsigned i = 1, e = getNumChildren(); i != e; ++i) {
|
|
OS << ", ";
|
|
getChild(i)->print(OS);
|
|
}
|
|
}
|
|
OS << ")";
|
|
}
|
|
|
|
for (unsigned i = 0, e = PredicateFns.size(); i != e; ++i)
|
|
OS << "<<P:" << PredicateFns[i] << ">>";
|
|
if (TransformFn)
|
|
OS << "<<X:" << TransformFn->getName() << ">>";
|
|
if (!getName().empty())
|
|
OS << ":$" << getName();
|
|
|
|
}
|
|
void TreePatternNode::dump() const {
|
|
print(*cerr.stream());
|
|
}
|
|
|
|
/// isIsomorphicTo - Return true if this node is recursively
|
|
/// isomorphic to the specified node. For this comparison, the node's
|
|
/// entire state is considered. The assigned name is ignored, since
|
|
/// nodes with differing names are considered isomorphic. However, if
|
|
/// the assigned name is present in the dependent variable set, then
|
|
/// the assigned name is considered significant and the node is
|
|
/// isomorphic if the names match.
|
|
bool TreePatternNode::isIsomorphicTo(const TreePatternNode *N,
|
|
const MultipleUseVarSet &DepVars) const {
|
|
if (N == this) return true;
|
|
if (N->isLeaf() != isLeaf() || getExtTypes() != N->getExtTypes() ||
|
|
getPredicateFns() != N->getPredicateFns() ||
|
|
getTransformFn() != N->getTransformFn())
|
|
return false;
|
|
|
|
if (isLeaf()) {
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(getLeafValue())) {
|
|
if (DefInit *NDI = dynamic_cast<DefInit*>(N->getLeafValue())) {
|
|
return ((DI->getDef() == NDI->getDef())
|
|
&& (DepVars.find(getName()) == DepVars.end()
|
|
|| getName() == N->getName()));
|
|
}
|
|
}
|
|
return getLeafValue() == N->getLeafValue();
|
|
}
|
|
|
|
if (N->getOperator() != getOperator() ||
|
|
N->getNumChildren() != getNumChildren()) return false;
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
|
|
if (!getChild(i)->isIsomorphicTo(N->getChild(i), DepVars))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// clone - Make a copy of this tree and all of its children.
|
|
///
|
|
TreePatternNode *TreePatternNode::clone() const {
|
|
TreePatternNode *New;
|
|
if (isLeaf()) {
|
|
New = new TreePatternNode(getLeafValue());
|
|
} else {
|
|
std::vector<TreePatternNode*> CChildren;
|
|
CChildren.reserve(Children.size());
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
|
|
CChildren.push_back(getChild(i)->clone());
|
|
New = new TreePatternNode(getOperator(), CChildren);
|
|
}
|
|
New->setName(getName());
|
|
New->setTypes(getExtTypes());
|
|
New->setPredicateFns(getPredicateFns());
|
|
New->setTransformFn(getTransformFn());
|
|
return New;
|
|
}
|
|
|
|
/// SubstituteFormalArguments - Replace the formal arguments in this tree
|
|
/// with actual values specified by ArgMap.
|
|
void TreePatternNode::
|
|
SubstituteFormalArguments(std::map<std::string, TreePatternNode*> &ArgMap) {
|
|
if (isLeaf()) return;
|
|
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i) {
|
|
TreePatternNode *Child = getChild(i);
|
|
if (Child->isLeaf()) {
|
|
Init *Val = Child->getLeafValue();
|
|
if (dynamic_cast<DefInit*>(Val) &&
|
|
static_cast<DefInit*>(Val)->getDef()->getName() == "node") {
|
|
// We found a use of a formal argument, replace it with its value.
|
|
TreePatternNode *NewChild = ArgMap[Child->getName()];
|
|
assert(NewChild && "Couldn't find formal argument!");
|
|
assert((Child->getPredicateFns().empty() ||
|
|
NewChild->getPredicateFns() == Child->getPredicateFns()) &&
|
|
"Non-empty child predicate clobbered!");
|
|
setChild(i, NewChild);
|
|
}
|
|
} else {
|
|
getChild(i)->SubstituteFormalArguments(ArgMap);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// InlinePatternFragments - If this pattern refers to any pattern
|
|
/// fragments, inline them into place, giving us a pattern without any
|
|
/// PatFrag references.
|
|
TreePatternNode *TreePatternNode::InlinePatternFragments(TreePattern &TP) {
|
|
if (isLeaf()) return this; // nothing to do.
|
|
Record *Op = getOperator();
|
|
|
|
if (!Op->isSubClassOf("PatFrag")) {
|
|
// Just recursively inline children nodes.
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i) {
|
|
TreePatternNode *Child = getChild(i);
|
|
TreePatternNode *NewChild = Child->InlinePatternFragments(TP);
|
|
|
|
assert((Child->getPredicateFns().empty() ||
|
|
NewChild->getPredicateFns() == Child->getPredicateFns()) &&
|
|
"Non-empty child predicate clobbered!");
|
|
|
|
setChild(i, NewChild);
|
|
}
|
|
return this;
|
|
}
|
|
|
|
// Otherwise, we found a reference to a fragment. First, look up its
|
|
// TreePattern record.
|
|
TreePattern *Frag = TP.getDAGPatterns().getPatternFragment(Op);
|
|
|
|
// Verify that we are passing the right number of operands.
|
|
if (Frag->getNumArgs() != Children.size())
|
|
TP.error("'" + Op->getName() + "' fragment requires " +
|
|
utostr(Frag->getNumArgs()) + " operands!");
|
|
|
|
TreePatternNode *FragTree = Frag->getOnlyTree()->clone();
|
|
|
|
std::string Code = Op->getValueAsCode("Predicate");
|
|
if (!Code.empty())
|
|
FragTree->addPredicateFn("Predicate_"+Op->getName());
|
|
|
|
// Resolve formal arguments to their actual value.
|
|
if (Frag->getNumArgs()) {
|
|
// Compute the map of formal to actual arguments.
|
|
std::map<std::string, TreePatternNode*> ArgMap;
|
|
for (unsigned i = 0, e = Frag->getNumArgs(); i != e; ++i)
|
|
ArgMap[Frag->getArgName(i)] = getChild(i)->InlinePatternFragments(TP);
|
|
|
|
FragTree->SubstituteFormalArguments(ArgMap);
|
|
}
|
|
|
|
FragTree->setName(getName());
|
|
FragTree->UpdateNodeType(getExtTypes(), TP);
|
|
|
|
// Transfer in the old predicates.
|
|
for (unsigned i = 0, e = getPredicateFns().size(); i != e; ++i)
|
|
FragTree->addPredicateFn(getPredicateFns()[i]);
|
|
|
|
// Get a new copy of this fragment to stitch into here.
|
|
//delete this; // FIXME: implement refcounting!
|
|
|
|
// The fragment we inlined could have recursive inlining that is needed. See
|
|
// if there are any pattern fragments in it and inline them as needed.
|
|
return FragTree->InlinePatternFragments(TP);
|
|
}
|
|
|
|
/// getImplicitType - Check to see if the specified record has an implicit
|
|
/// type which should be applied to it. This infer the type of register
|
|
/// references from the register file information, for example.
|
|
///
|
|
static std::vector<unsigned char> getImplicitType(Record *R, bool NotRegisters,
|
|
TreePattern &TP) {
|
|
// Some common return values
|
|
std::vector<unsigned char> Unknown(1, EMVT::isUnknown);
|
|
std::vector<unsigned char> Other(1, MVT::Other);
|
|
|
|
// Check to see if this is a register or a register class...
|
|
if (R->isSubClassOf("RegisterClass")) {
|
|
if (NotRegisters)
|
|
return Unknown;
|
|
const CodeGenRegisterClass &RC =
|
|
TP.getDAGPatterns().getTargetInfo().getRegisterClass(R);
|
|
return ConvertVTs(RC.getValueTypes());
|
|
} else if (R->isSubClassOf("PatFrag")) {
|
|
// Pattern fragment types will be resolved when they are inlined.
|
|
return Unknown;
|
|
} else if (R->isSubClassOf("Register")) {
|
|
if (NotRegisters)
|
|
return Unknown;
|
|
const CodeGenTarget &T = TP.getDAGPatterns().getTargetInfo();
|
|
return T.getRegisterVTs(R);
|
|
} else if (R->isSubClassOf("ValueType") || R->isSubClassOf("CondCode")) {
|
|
// Using a VTSDNode or CondCodeSDNode.
|
|
return Other;
|
|
} else if (R->isSubClassOf("ComplexPattern")) {
|
|
if (NotRegisters)
|
|
return Unknown;
|
|
std::vector<unsigned char>
|
|
ComplexPat(1, TP.getDAGPatterns().getComplexPattern(R).getValueType());
|
|
return ComplexPat;
|
|
} else if (R->getName() == "ptr_rc") {
|
|
Other[0] = MVT::iPTR;
|
|
return Other;
|
|
} else if (R->getName() == "node" || R->getName() == "srcvalue" ||
|
|
R->getName() == "zero_reg") {
|
|
// Placeholder.
|
|
return Unknown;
|
|
}
|
|
|
|
TP.error("Unknown node flavor used in pattern: " + R->getName());
|
|
return Other;
|
|
}
|
|
|
|
|
|
/// getIntrinsicInfo - If this node corresponds to an intrinsic, return the
|
|
/// CodeGenIntrinsic information for it, otherwise return a null pointer.
|
|
const CodeGenIntrinsic *TreePatternNode::
|
|
getIntrinsicInfo(const CodeGenDAGPatterns &CDP) const {
|
|
if (getOperator() != CDP.get_intrinsic_void_sdnode() &&
|
|
getOperator() != CDP.get_intrinsic_w_chain_sdnode() &&
|
|
getOperator() != CDP.get_intrinsic_wo_chain_sdnode())
|
|
return 0;
|
|
|
|
unsigned IID =
|
|
dynamic_cast<IntInit*>(getChild(0)->getLeafValue())->getValue();
|
|
return &CDP.getIntrinsicInfo(IID);
|
|
}
|
|
|
|
/// isCommutativeIntrinsic - Return true if the node corresponds to a
|
|
/// commutative intrinsic.
|
|
bool
|
|
TreePatternNode::isCommutativeIntrinsic(const CodeGenDAGPatterns &CDP) const {
|
|
if (const CodeGenIntrinsic *Int = getIntrinsicInfo(CDP))
|
|
return Int->isCommutative;
|
|
return false;
|
|
}
|
|
|
|
|
|
/// ApplyTypeConstraints - Apply all of the type constraints relevant 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 TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
|
|
CodeGenDAGPatterns &CDP = TP.getDAGPatterns();
|
|
if (isLeaf()) {
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(getLeafValue())) {
|
|
// If it's a regclass or something else known, include the type.
|
|
return UpdateNodeType(getImplicitType(DI->getDef(), NotRegisters, TP),TP);
|
|
} else if (IntInit *II = dynamic_cast<IntInit*>(getLeafValue())) {
|
|
// Int inits are always integers. :)
|
|
bool MadeChange = UpdateNodeType(EMVT::isInt, TP);
|
|
|
|
if (hasTypeSet()) {
|
|
// At some point, it may make sense for this tree pattern to have
|
|
// multiple types. Assert here that it does not, so we revisit this
|
|
// code when appropriate.
|
|
assert(getExtTypes().size() >= 1 && "TreePattern doesn't have a type!");
|
|
MVT::SimpleValueType VT = getTypeNum(0);
|
|
for (unsigned i = 1, e = getExtTypes().size(); i != e; ++i)
|
|
assert(getTypeNum(i) == VT && "TreePattern has too many types!");
|
|
|
|
VT = getTypeNum(0);
|
|
if (VT != MVT::iPTR && VT != MVT::iPTRAny) {
|
|
unsigned Size = MVT(VT).getSizeInBits();
|
|
// Make sure that the value is representable for this type.
|
|
if (Size < 32) {
|
|
int Val = (II->getValue() << (32-Size)) >> (32-Size);
|
|
if (Val != II->getValue()) {
|
|
// If sign-extended doesn't fit, does it fit as unsigned?
|
|
unsigned ValueMask;
|
|
unsigned UnsignedVal;
|
|
ValueMask = unsigned(~uint32_t(0UL) >> (32-Size));
|
|
UnsignedVal = unsigned(II->getValue());
|
|
|
|
if ((ValueMask & UnsignedVal) != UnsignedVal) {
|
|
TP.error("Integer value '" + itostr(II->getValue())+
|
|
"' is out of range for type '" +
|
|
getEnumName(getTypeNum(0)) + "'!");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return MadeChange;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// special handling for set, which isn't really an SDNode.
|
|
if (getOperator()->getName() == "set") {
|
|
assert (getNumChildren() >= 2 && "Missing RHS of a set?");
|
|
unsigned NC = getNumChildren();
|
|
bool MadeChange = false;
|
|
for (unsigned i = 0; i < NC-1; ++i) {
|
|
MadeChange = getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
|
|
MadeChange |= getChild(NC-1)->ApplyTypeConstraints(TP, NotRegisters);
|
|
|
|
// Types of operands must match.
|
|
MadeChange |= getChild(i)->UpdateNodeType(getChild(NC-1)->getExtTypes(),
|
|
TP);
|
|
MadeChange |= getChild(NC-1)->UpdateNodeType(getChild(i)->getExtTypes(),
|
|
TP);
|
|
MadeChange |= UpdateNodeType(MVT::isVoid, TP);
|
|
}
|
|
return MadeChange;
|
|
} else if (getOperator()->getName() == "implicit" ||
|
|
getOperator()->getName() == "parallel") {
|
|
bool MadeChange = false;
|
|
for (unsigned i = 0; i < getNumChildren(); ++i)
|
|
MadeChange = getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
|
|
MadeChange |= UpdateNodeType(MVT::isVoid, TP);
|
|
return MadeChange;
|
|
} else if (getOperator()->getName() == "COPY_TO_REGCLASS") {
|
|
bool MadeChange = false;
|
|
MadeChange |= getChild(0)->ApplyTypeConstraints(TP, NotRegisters);
|
|
MadeChange |= getChild(1)->ApplyTypeConstraints(TP, NotRegisters);
|
|
MadeChange |= UpdateNodeType(getChild(1)->getTypeNum(0), TP);
|
|
return MadeChange;
|
|
} else if (const CodeGenIntrinsic *Int = getIntrinsicInfo(CDP)) {
|
|
bool MadeChange = false;
|
|
|
|
// Apply the result type to the node.
|
|
unsigned NumRetVTs = Int->IS.RetVTs.size();
|
|
unsigned NumParamVTs = Int->IS.ParamVTs.size();
|
|
|
|
for (unsigned i = 0, e = NumRetVTs; i != e; ++i)
|
|
MadeChange |= UpdateNodeType(Int->IS.RetVTs[i], TP);
|
|
|
|
if (getNumChildren() != NumParamVTs + NumRetVTs)
|
|
TP.error("Intrinsic '" + Int->Name + "' expects " +
|
|
utostr(NumParamVTs + NumRetVTs - 1) + " operands, not " +
|
|
utostr(getNumChildren() - 1) + " operands!");
|
|
|
|
// Apply type info to the intrinsic ID.
|
|
MadeChange |= getChild(0)->UpdateNodeType(MVT::iPTR, TP);
|
|
|
|
for (unsigned i = NumRetVTs, e = getNumChildren(); i != e; ++i) {
|
|
MVT::SimpleValueType OpVT = Int->IS.ParamVTs[i - NumRetVTs];
|
|
MadeChange |= getChild(i)->UpdateNodeType(OpVT, TP);
|
|
MadeChange |= getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
|
|
}
|
|
return MadeChange;
|
|
} else if (getOperator()->isSubClassOf("SDNode")) {
|
|
const SDNodeInfo &NI = CDP.getSDNodeInfo(getOperator());
|
|
|
|
bool MadeChange = NI.ApplyTypeConstraints(this, TP);
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
|
|
MadeChange |= getChild(i)->ApplyTypeConstraints(TP, NotRegisters);
|
|
// Branch, etc. do not produce results and top-level forms in instr pattern
|
|
// must have void types.
|
|
if (NI.getNumResults() == 0)
|
|
MadeChange |= UpdateNodeType(MVT::isVoid, TP);
|
|
|
|
return MadeChange;
|
|
} else if (getOperator()->isSubClassOf("Instruction")) {
|
|
const DAGInstruction &Inst = CDP.getInstruction(getOperator());
|
|
bool MadeChange = false;
|
|
unsigned NumResults = Inst.getNumResults();
|
|
|
|
assert(NumResults <= 1 &&
|
|
"Only supports zero or one result instrs!");
|
|
|
|
CodeGenInstruction &InstInfo =
|
|
CDP.getTargetInfo().getInstruction(getOperator()->getName());
|
|
// Apply the result type to the node
|
|
if (NumResults == 0 || InstInfo.NumDefs == 0) {
|
|
MadeChange = UpdateNodeType(MVT::isVoid, TP);
|
|
} else {
|
|
Record *ResultNode = Inst.getResult(0);
|
|
|
|
if (ResultNode->getName() == "ptr_rc") {
|
|
std::vector<unsigned char> VT;
|
|
VT.push_back(MVT::iPTR);
|
|
MadeChange = UpdateNodeType(VT, TP);
|
|
} else if (ResultNode->getName() == "unknown") {
|
|
std::vector<unsigned char> VT;
|
|
VT.push_back(EMVT::isUnknown);
|
|
MadeChange = UpdateNodeType(VT, TP);
|
|
} else {
|
|
assert(ResultNode->isSubClassOf("RegisterClass") &&
|
|
"Operands should be register classes!");
|
|
|
|
const CodeGenRegisterClass &RC =
|
|
CDP.getTargetInfo().getRegisterClass(ResultNode);
|
|
MadeChange = UpdateNodeType(ConvertVTs(RC.getValueTypes()), TP);
|
|
}
|
|
}
|
|
|
|
unsigned ChildNo = 0;
|
|
for (unsigned i = 0, e = Inst.getNumOperands(); i != e; ++i) {
|
|
Record *OperandNode = Inst.getOperand(i);
|
|
|
|
// If the instruction expects a predicate or optional def operand, we
|
|
// codegen this by setting the operand to it's default value if it has a
|
|
// non-empty DefaultOps field.
|
|
if ((OperandNode->isSubClassOf("PredicateOperand") ||
|
|
OperandNode->isSubClassOf("OptionalDefOperand")) &&
|
|
!CDP.getDefaultOperand(OperandNode).DefaultOps.empty())
|
|
continue;
|
|
|
|
// Verify that we didn't run out of provided operands.
|
|
if (ChildNo >= getNumChildren())
|
|
TP.error("Instruction '" + getOperator()->getName() +
|
|
"' expects more operands than were provided.");
|
|
|
|
MVT::SimpleValueType VT;
|
|
TreePatternNode *Child = getChild(ChildNo++);
|
|
if (OperandNode->isSubClassOf("RegisterClass")) {
|
|
const CodeGenRegisterClass &RC =
|
|
CDP.getTargetInfo().getRegisterClass(OperandNode);
|
|
MadeChange |= Child->UpdateNodeType(ConvertVTs(RC.getValueTypes()), TP);
|
|
} else if (OperandNode->isSubClassOf("Operand")) {
|
|
VT = getValueType(OperandNode->getValueAsDef("Type"));
|
|
MadeChange |= Child->UpdateNodeType(VT, TP);
|
|
} else if (OperandNode->getName() == "ptr_rc") {
|
|
MadeChange |= Child->UpdateNodeType(MVT::iPTR, TP);
|
|
} else if (OperandNode->getName() == "unknown") {
|
|
MadeChange |= Child->UpdateNodeType(EMVT::isUnknown, TP);
|
|
} else {
|
|
assert(0 && "Unknown operand type!");
|
|
abort();
|
|
}
|
|
MadeChange |= Child->ApplyTypeConstraints(TP, NotRegisters);
|
|
}
|
|
|
|
if (ChildNo != getNumChildren())
|
|
TP.error("Instruction '" + getOperator()->getName() +
|
|
"' was provided too many operands!");
|
|
|
|
return MadeChange;
|
|
} else {
|
|
assert(getOperator()->isSubClassOf("SDNodeXForm") && "Unknown node type!");
|
|
|
|
// Node transforms always take one operand.
|
|
if (getNumChildren() != 1)
|
|
TP.error("Node transform '" + getOperator()->getName() +
|
|
"' requires one operand!");
|
|
|
|
// If either the output or input of the xform does not have exact
|
|
// type info. We assume they must be the same. Otherwise, it is perfectly
|
|
// legal to transform from one type to a completely different type.
|
|
if (!hasTypeSet() || !getChild(0)->hasTypeSet()) {
|
|
bool MadeChange = UpdateNodeType(getChild(0)->getExtTypes(), TP);
|
|
MadeChange |= getChild(0)->UpdateNodeType(getExtTypes(), TP);
|
|
return MadeChange;
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// OnlyOnRHSOfCommutative - Return true if this value is only allowed on the
|
|
/// RHS of a commutative operation, not the on LHS.
|
|
static bool OnlyOnRHSOfCommutative(TreePatternNode *N) {
|
|
if (!N->isLeaf() && N->getOperator()->getName() == "imm")
|
|
return true;
|
|
if (N->isLeaf() && dynamic_cast<IntInit*>(N->getLeafValue()))
|
|
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. This is
|
|
/// used as a sanity check for .td files (to prevent people from writing stuff
|
|
/// that can never possibly work), and to prevent the pattern permuter from
|
|
/// generating stuff that is useless.
|
|
bool TreePatternNode::canPatternMatch(std::string &Reason,
|
|
const CodeGenDAGPatterns &CDP) {
|
|
if (isLeaf()) return true;
|
|
|
|
for (unsigned i = 0, e = getNumChildren(); i != e; ++i)
|
|
if (!getChild(i)->canPatternMatch(Reason, CDP))
|
|
return false;
|
|
|
|
// If this is an intrinsic, handle cases that would make it not match. For
|
|
// example, if an operand is required to be an immediate.
|
|
if (getOperator()->isSubClassOf("Intrinsic")) {
|
|
// TODO:
|
|
return true;
|
|
}
|
|
|
|
// If this node is a commutative operator, check that the LHS isn't an
|
|
// immediate.
|
|
const SDNodeInfo &NodeInfo = CDP.getSDNodeInfo(getOperator());
|
|
bool isCommIntrinsic = isCommutativeIntrinsic(CDP);
|
|
if (NodeInfo.hasProperty(SDNPCommutative) || isCommIntrinsic) {
|
|
// Scan all of the operands of the node and make sure that only the last one
|
|
// is a constant node, unless the RHS also is.
|
|
if (!OnlyOnRHSOfCommutative(getChild(getNumChildren()-1))) {
|
|
bool Skip = isCommIntrinsic ? 1 : 0; // First operand is intrinsic id.
|
|
for (unsigned i = Skip, e = getNumChildren()-1; i != e; ++i)
|
|
if (OnlyOnRHSOfCommutative(getChild(i))) {
|
|
Reason="Immediate value must be on the RHS of commutative operators!";
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// TreePattern implementation
|
|
//
|
|
|
|
TreePattern::TreePattern(Record *TheRec, ListInit *RawPat, bool isInput,
|
|
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
|
|
isInputPattern = isInput;
|
|
for (unsigned i = 0, e = RawPat->getSize(); i != e; ++i)
|
|
Trees.push_back(ParseTreePattern((DagInit*)RawPat->getElement(i)));
|
|
}
|
|
|
|
TreePattern::TreePattern(Record *TheRec, DagInit *Pat, bool isInput,
|
|
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
|
|
isInputPattern = isInput;
|
|
Trees.push_back(ParseTreePattern(Pat));
|
|
}
|
|
|
|
TreePattern::TreePattern(Record *TheRec, TreePatternNode *Pat, bool isInput,
|
|
CodeGenDAGPatterns &cdp) : TheRecord(TheRec), CDP(cdp){
|
|
isInputPattern = isInput;
|
|
Trees.push_back(Pat);
|
|
}
|
|
|
|
|
|
|
|
void TreePattern::error(const std::string &Msg) const {
|
|
dump();
|
|
throw TGError(TheRecord->getLoc(), "In " + TheRecord->getName() + ": " + Msg);
|
|
}
|
|
|
|
TreePatternNode *TreePattern::ParseTreePattern(DagInit *Dag) {
|
|
DefInit *OpDef = dynamic_cast<DefInit*>(Dag->getOperator());
|
|
if (!OpDef) error("Pattern has unexpected operator type!");
|
|
Record *Operator = OpDef->getDef();
|
|
|
|
if (Operator->isSubClassOf("ValueType")) {
|
|
// If the operator is a ValueType, then this must be "type cast" of a leaf
|
|
// node.
|
|
if (Dag->getNumArgs() != 1)
|
|
error("Type cast only takes one operand!");
|
|
|
|
Init *Arg = Dag->getArg(0);
|
|
TreePatternNode *New;
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(Arg)) {
|
|
Record *R = DI->getDef();
|
|
if (R->isSubClassOf("SDNode") || R->isSubClassOf("PatFrag")) {
|
|
Dag->setArg(0, new DagInit(DI, "",
|
|
std::vector<std::pair<Init*, std::string> >()));
|
|
return ParseTreePattern(Dag);
|
|
}
|
|
New = new TreePatternNode(DI);
|
|
} else if (DagInit *DI = dynamic_cast<DagInit*>(Arg)) {
|
|
New = ParseTreePattern(DI);
|
|
} else if (IntInit *II = dynamic_cast<IntInit*>(Arg)) {
|
|
New = new TreePatternNode(II);
|
|
if (!Dag->getArgName(0).empty())
|
|
error("Constant int argument should not have a name!");
|
|
} else if (BitsInit *BI = dynamic_cast<BitsInit*>(Arg)) {
|
|
// Turn this into an IntInit.
|
|
Init *II = BI->convertInitializerTo(new IntRecTy());
|
|
if (II == 0 || !dynamic_cast<IntInit*>(II))
|
|
error("Bits value must be constants!");
|
|
|
|
New = new TreePatternNode(dynamic_cast<IntInit*>(II));
|
|
if (!Dag->getArgName(0).empty())
|
|
error("Constant int argument should not have a name!");
|
|
} else {
|
|
Arg->dump();
|
|
error("Unknown leaf value for tree pattern!");
|
|
return 0;
|
|
}
|
|
|
|
// Apply the type cast.
|
|
New->UpdateNodeType(getValueType(Operator), *this);
|
|
if (New->getNumChildren() == 0)
|
|
New->setName(Dag->getArgName(0));
|
|
return New;
|
|
}
|
|
|
|
// Verify that this is something that makes sense for an operator.
|
|
if (!Operator->isSubClassOf("PatFrag") &&
|
|
!Operator->isSubClassOf("SDNode") &&
|
|
!Operator->isSubClassOf("Instruction") &&
|
|
!Operator->isSubClassOf("SDNodeXForm") &&
|
|
!Operator->isSubClassOf("Intrinsic") &&
|
|
Operator->getName() != "set" &&
|
|
Operator->getName() != "implicit" &&
|
|
Operator->getName() != "parallel")
|
|
error("Unrecognized node '" + Operator->getName() + "'!");
|
|
|
|
// Check to see if this is something that is illegal in an input pattern.
|
|
if (isInputPattern && (Operator->isSubClassOf("Instruction") ||
|
|
Operator->isSubClassOf("SDNodeXForm")))
|
|
error("Cannot use '" + Operator->getName() + "' in an input pattern!");
|
|
|
|
std::vector<TreePatternNode*> Children;
|
|
|
|
for (unsigned i = 0, e = Dag->getNumArgs(); i != e; ++i) {
|
|
Init *Arg = Dag->getArg(i);
|
|
if (DagInit *DI = dynamic_cast<DagInit*>(Arg)) {
|
|
Children.push_back(ParseTreePattern(DI));
|
|
if (Children.back()->getName().empty())
|
|
Children.back()->setName(Dag->getArgName(i));
|
|
} else if (DefInit *DefI = dynamic_cast<DefInit*>(Arg)) {
|
|
Record *R = DefI->getDef();
|
|
// Direct reference to a leaf DagNode or PatFrag? Turn it into a
|
|
// TreePatternNode if its own.
|
|
if (R->isSubClassOf("SDNode") || R->isSubClassOf("PatFrag")) {
|
|
Dag->setArg(i, new DagInit(DefI, "",
|
|
std::vector<std::pair<Init*, std::string> >()));
|
|
--i; // Revisit this node...
|
|
} else {
|
|
TreePatternNode *Node = new TreePatternNode(DefI);
|
|
Node->setName(Dag->getArgName(i));
|
|
Children.push_back(Node);
|
|
|
|
// Input argument?
|
|
if (R->getName() == "node") {
|
|
if (Dag->getArgName(i).empty())
|
|
error("'node' argument requires a name to match with operand list");
|
|
Args.push_back(Dag->getArgName(i));
|
|
}
|
|
}
|
|
} else if (IntInit *II = dynamic_cast<IntInit*>(Arg)) {
|
|
TreePatternNode *Node = new TreePatternNode(II);
|
|
if (!Dag->getArgName(i).empty())
|
|
error("Constant int argument should not have a name!");
|
|
Children.push_back(Node);
|
|
} else if (BitsInit *BI = dynamic_cast<BitsInit*>(Arg)) {
|
|
// Turn this into an IntInit.
|
|
Init *II = BI->convertInitializerTo(new IntRecTy());
|
|
if (II == 0 || !dynamic_cast<IntInit*>(II))
|
|
error("Bits value must be constants!");
|
|
|
|
TreePatternNode *Node = new TreePatternNode(dynamic_cast<IntInit*>(II));
|
|
if (!Dag->getArgName(i).empty())
|
|
error("Constant int argument should not have a name!");
|
|
Children.push_back(Node);
|
|
} else {
|
|
cerr << '"';
|
|
Arg->dump();
|
|
cerr << "\": ";
|
|
error("Unknown leaf value for tree pattern!");
|
|
}
|
|
}
|
|
|
|
// If the operator is an intrinsic, then this is just syntactic sugar for for
|
|
// (intrinsic_* <number>, ..children..). Pick the right intrinsic node, and
|
|
// convert the intrinsic name to a number.
|
|
if (Operator->isSubClassOf("Intrinsic")) {
|
|
const CodeGenIntrinsic &Int = getDAGPatterns().getIntrinsic(Operator);
|
|
unsigned IID = getDAGPatterns().getIntrinsicID(Operator)+1;
|
|
|
|
// If this intrinsic returns void, it must have side-effects and thus a
|
|
// chain.
|
|
if (Int.IS.RetVTs[0] == MVT::isVoid) {
|
|
Operator = getDAGPatterns().get_intrinsic_void_sdnode();
|
|
} else if (Int.ModRef != CodeGenIntrinsic::NoMem) {
|
|
// Has side-effects, requires chain.
|
|
Operator = getDAGPatterns().get_intrinsic_w_chain_sdnode();
|
|
} else {
|
|
// Otherwise, no chain.
|
|
Operator = getDAGPatterns().get_intrinsic_wo_chain_sdnode();
|
|
}
|
|
|
|
TreePatternNode *IIDNode = new TreePatternNode(new IntInit(IID));
|
|
Children.insert(Children.begin(), IIDNode);
|
|
}
|
|
|
|
TreePatternNode *Result = new TreePatternNode(Operator, Children);
|
|
Result->setName(Dag->getName());
|
|
return Result;
|
|
}
|
|
|
|
/// InferAllTypes - Infer/propagate as many types throughout the expression
|
|
/// patterns as possible. Return true if all types are inferred, false
|
|
/// otherwise. Throw an exception if a type contradiction is found.
|
|
bool TreePattern::InferAllTypes() {
|
|
bool MadeChange = true;
|
|
while (MadeChange) {
|
|
MadeChange = false;
|
|
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
|
|
MadeChange |= Trees[i]->ApplyTypeConstraints(*this, false);
|
|
}
|
|
|
|
bool HasUnresolvedTypes = false;
|
|
for (unsigned i = 0, e = Trees.size(); i != e; ++i)
|
|
HasUnresolvedTypes |= Trees[i]->ContainsUnresolvedType();
|
|
return !HasUnresolvedTypes;
|
|
}
|
|
|
|
void TreePattern::print(std::ostream &OS) const {
|
|
OS << getRecord()->getName();
|
|
if (!Args.empty()) {
|
|
OS << "(" << Args[0];
|
|
for (unsigned i = 1, e = Args.size(); i != e; ++i)
|
|
OS << ", " << Args[i];
|
|
OS << ")";
|
|
}
|
|
OS << ": ";
|
|
|
|
if (Trees.size() > 1)
|
|
OS << "[\n";
|
|
for (unsigned i = 0, e = Trees.size(); i != e; ++i) {
|
|
OS << "\t";
|
|
Trees[i]->print(OS);
|
|
OS << "\n";
|
|
}
|
|
|
|
if (Trees.size() > 1)
|
|
OS << "]\n";
|
|
}
|
|
|
|
void TreePattern::dump() const { print(*cerr.stream()); }
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// CodeGenDAGPatterns implementation
|
|
//
|
|
|
|
// FIXME: REMOVE OSTREAM ARGUMENT
|
|
CodeGenDAGPatterns::CodeGenDAGPatterns(RecordKeeper &R) : Records(R) {
|
|
Intrinsics = LoadIntrinsics(Records, false);
|
|
TgtIntrinsics = LoadIntrinsics(Records, true);
|
|
ParseNodeInfo();
|
|
ParseNodeTransforms();
|
|
ParseComplexPatterns();
|
|
ParsePatternFragments();
|
|
ParseDefaultOperands();
|
|
ParseInstructions();
|
|
ParsePatterns();
|
|
|
|
// Generate variants. For example, commutative patterns can match
|
|
// multiple ways. Add them to PatternsToMatch as well.
|
|
GenerateVariants();
|
|
|
|
// Infer instruction flags. For example, we can detect loads,
|
|
// stores, and side effects in many cases by examining an
|
|
// instruction's pattern.
|
|
InferInstructionFlags();
|
|
}
|
|
|
|
CodeGenDAGPatterns::~CodeGenDAGPatterns() {
|
|
for (std::map<Record*, TreePattern*>::iterator I = PatternFragments.begin(),
|
|
E = PatternFragments.end(); I != E; ++I)
|
|
delete I->second;
|
|
}
|
|
|
|
|
|
Record *CodeGenDAGPatterns::getSDNodeNamed(const std::string &Name) const {
|
|
Record *N = Records.getDef(Name);
|
|
if (!N || !N->isSubClassOf("SDNode")) {
|
|
cerr << "Error getting SDNode '" << Name << "'!\n";
|
|
exit(1);
|
|
}
|
|
return N;
|
|
}
|
|
|
|
// Parse all of the SDNode definitions for the target, populating SDNodes.
|
|
void CodeGenDAGPatterns::ParseNodeInfo() {
|
|
std::vector<Record*> Nodes = Records.getAllDerivedDefinitions("SDNode");
|
|
while (!Nodes.empty()) {
|
|
SDNodes.insert(std::make_pair(Nodes.back(), Nodes.back()));
|
|
Nodes.pop_back();
|
|
}
|
|
|
|
// Get the builtin intrinsic nodes.
|
|
intrinsic_void_sdnode = getSDNodeNamed("intrinsic_void");
|
|
intrinsic_w_chain_sdnode = getSDNodeNamed("intrinsic_w_chain");
|
|
intrinsic_wo_chain_sdnode = getSDNodeNamed("intrinsic_wo_chain");
|
|
}
|
|
|
|
/// ParseNodeTransforms - Parse all SDNodeXForm instances into the SDNodeXForms
|
|
/// map, and emit them to the file as functions.
|
|
void CodeGenDAGPatterns::ParseNodeTransforms() {
|
|
std::vector<Record*> Xforms = Records.getAllDerivedDefinitions("SDNodeXForm");
|
|
while (!Xforms.empty()) {
|
|
Record *XFormNode = Xforms.back();
|
|
Record *SDNode = XFormNode->getValueAsDef("Opcode");
|
|
std::string Code = XFormNode->getValueAsCode("XFormFunction");
|
|
SDNodeXForms.insert(std::make_pair(XFormNode, NodeXForm(SDNode, Code)));
|
|
|
|
Xforms.pop_back();
|
|
}
|
|
}
|
|
|
|
void CodeGenDAGPatterns::ParseComplexPatterns() {
|
|
std::vector<Record*> AMs = Records.getAllDerivedDefinitions("ComplexPattern");
|
|
while (!AMs.empty()) {
|
|
ComplexPatterns.insert(std::make_pair(AMs.back(), AMs.back()));
|
|
AMs.pop_back();
|
|
}
|
|
}
|
|
|
|
|
|
/// ParsePatternFragments - Parse all of the PatFrag definitions in the .td
|
|
/// file, building up the PatternFragments map. After we've collected them all,
|
|
/// inline fragments together as necessary, so that there are no references left
|
|
/// inside a pattern fragment to a pattern fragment.
|
|
///
|
|
void CodeGenDAGPatterns::ParsePatternFragments() {
|
|
std::vector<Record*> Fragments = Records.getAllDerivedDefinitions("PatFrag");
|
|
|
|
// First step, parse all of the fragments.
|
|
for (unsigned i = 0, e = Fragments.size(); i != e; ++i) {
|
|
DagInit *Tree = Fragments[i]->getValueAsDag("Fragment");
|
|
TreePattern *P = new TreePattern(Fragments[i], Tree, true, *this);
|
|
PatternFragments[Fragments[i]] = P;
|
|
|
|
// Validate the argument list, converting it to set, to discard duplicates.
|
|
std::vector<std::string> &Args = P->getArgList();
|
|
std::set<std::string> OperandsSet(Args.begin(), Args.end());
|
|
|
|
if (OperandsSet.count(""))
|
|
P->error("Cannot have unnamed 'node' values in pattern fragment!");
|
|
|
|
// Parse the operands list.
|
|
DagInit *OpsList = Fragments[i]->getValueAsDag("Operands");
|
|
DefInit *OpsOp = dynamic_cast<DefInit*>(OpsList->getOperator());
|
|
// Special cases: ops == outs == ins. Different names are used to
|
|
// improve readability.
|
|
if (!OpsOp ||
|
|
(OpsOp->getDef()->getName() != "ops" &&
|
|
OpsOp->getDef()->getName() != "outs" &&
|
|
OpsOp->getDef()->getName() != "ins"))
|
|
P->error("Operands list should start with '(ops ... '!");
|
|
|
|
// Copy over the arguments.
|
|
Args.clear();
|
|
for (unsigned j = 0, e = OpsList->getNumArgs(); j != e; ++j) {
|
|
if (!dynamic_cast<DefInit*>(OpsList->getArg(j)) ||
|
|
static_cast<DefInit*>(OpsList->getArg(j))->
|
|
getDef()->getName() != "node")
|
|
P->error("Operands list should all be 'node' values.");
|
|
if (OpsList->getArgName(j).empty())
|
|
P->error("Operands list should have names for each operand!");
|
|
if (!OperandsSet.count(OpsList->getArgName(j)))
|
|
P->error("'" + OpsList->getArgName(j) +
|
|
"' does not occur in pattern or was multiply specified!");
|
|
OperandsSet.erase(OpsList->getArgName(j));
|
|
Args.push_back(OpsList->getArgName(j));
|
|
}
|
|
|
|
if (!OperandsSet.empty())
|
|
P->error("Operands list does not contain an entry for operand '" +
|
|
*OperandsSet.begin() + "'!");
|
|
|
|
// If there is a code init for this fragment, keep track of the fact that
|
|
// this fragment uses it.
|
|
std::string Code = Fragments[i]->getValueAsCode("Predicate");
|
|
if (!Code.empty())
|
|
P->getOnlyTree()->addPredicateFn("Predicate_"+Fragments[i]->getName());
|
|
|
|
// If there is a node transformation corresponding to this, keep track of
|
|
// it.
|
|
Record *Transform = Fragments[i]->getValueAsDef("OperandTransform");
|
|
if (!getSDNodeTransform(Transform).second.empty()) // not noop xform?
|
|
P->getOnlyTree()->setTransformFn(Transform);
|
|
}
|
|
|
|
// Now that we've parsed all of the tree fragments, do a closure on them so
|
|
// that there are not references to PatFrags left inside of them.
|
|
for (unsigned i = 0, e = Fragments.size(); i != e; ++i) {
|
|
TreePattern *ThePat = PatternFragments[Fragments[i]];
|
|
ThePat->InlinePatternFragments();
|
|
|
|
// Infer as many types as possible. Don't worry about it if we don't infer
|
|
// all of them, some may depend on the inputs of the pattern.
|
|
try {
|
|
ThePat->InferAllTypes();
|
|
} catch (...) {
|
|
// If this pattern fragment is not supported by this target (no types can
|
|
// satisfy its constraints), just ignore it. If the bogus pattern is
|
|
// actually used by instructions, the type consistency error will be
|
|
// reported there.
|
|
}
|
|
|
|
// If debugging, print out the pattern fragment result.
|
|
DEBUG(ThePat->dump());
|
|
}
|
|
}
|
|
|
|
void CodeGenDAGPatterns::ParseDefaultOperands() {
|
|
std::vector<Record*> DefaultOps[2];
|
|
DefaultOps[0] = Records.getAllDerivedDefinitions("PredicateOperand");
|
|
DefaultOps[1] = Records.getAllDerivedDefinitions("OptionalDefOperand");
|
|
|
|
// Find some SDNode.
|
|
assert(!SDNodes.empty() && "No SDNodes parsed?");
|
|
Init *SomeSDNode = new DefInit(SDNodes.begin()->first);
|
|
|
|
for (unsigned iter = 0; iter != 2; ++iter) {
|
|
for (unsigned i = 0, e = DefaultOps[iter].size(); i != e; ++i) {
|
|
DagInit *DefaultInfo = DefaultOps[iter][i]->getValueAsDag("DefaultOps");
|
|
|
|
// Clone the DefaultInfo dag node, changing the operator from 'ops' to
|
|
// SomeSDnode so that we can parse this.
|
|
std::vector<std::pair<Init*, std::string> > Ops;
|
|
for (unsigned op = 0, e = DefaultInfo->getNumArgs(); op != e; ++op)
|
|
Ops.push_back(std::make_pair(DefaultInfo->getArg(op),
|
|
DefaultInfo->getArgName(op)));
|
|
DagInit *DI = new DagInit(SomeSDNode, "", Ops);
|
|
|
|
// Create a TreePattern to parse this.
|
|
TreePattern P(DefaultOps[iter][i], DI, false, *this);
|
|
assert(P.getNumTrees() == 1 && "This ctor can only produce one tree!");
|
|
|
|
// Copy the operands over into a DAGDefaultOperand.
|
|
DAGDefaultOperand DefaultOpInfo;
|
|
|
|
TreePatternNode *T = P.getTree(0);
|
|
for (unsigned op = 0, e = T->getNumChildren(); op != e; ++op) {
|
|
TreePatternNode *TPN = T->getChild(op);
|
|
while (TPN->ApplyTypeConstraints(P, false))
|
|
/* Resolve all types */;
|
|
|
|
if (TPN->ContainsUnresolvedType()) {
|
|
if (iter == 0)
|
|
throw "Value #" + utostr(i) + " of PredicateOperand '" +
|
|
DefaultOps[iter][i]->getName() + "' doesn't have a concrete type!";
|
|
else
|
|
throw "Value #" + utostr(i) + " of OptionalDefOperand '" +
|
|
DefaultOps[iter][i]->getName() + "' doesn't have a concrete type!";
|
|
}
|
|
DefaultOpInfo.DefaultOps.push_back(TPN);
|
|
}
|
|
|
|
// Insert it into the DefaultOperands map so we can find it later.
|
|
DefaultOperands[DefaultOps[iter][i]] = DefaultOpInfo;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// HandleUse - Given "Pat" a leaf in the pattern, check to see if it is an
|
|
/// instruction input. Return true if this is a real use.
|
|
static bool HandleUse(TreePattern *I, TreePatternNode *Pat,
|
|
std::map<std::string, TreePatternNode*> &InstInputs,
|
|
std::vector<Record*> &InstImpInputs) {
|
|
// No name -> not interesting.
|
|
if (Pat->getName().empty()) {
|
|
if (Pat->isLeaf()) {
|
|
DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
|
|
if (DI && DI->getDef()->isSubClassOf("RegisterClass"))
|
|
I->error("Input " + DI->getDef()->getName() + " must be named!");
|
|
else if (DI && DI->getDef()->isSubClassOf("Register"))
|
|
InstImpInputs.push_back(DI->getDef());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Record *Rec;
|
|
if (Pat->isLeaf()) {
|
|
DefInit *DI = dynamic_cast<DefInit*>(Pat->getLeafValue());
|
|
if (!DI) I->error("Input $" + Pat->getName() + " must be an identifier!");
|
|
Rec = DI->getDef();
|
|
} else {
|
|
Rec = Pat->getOperator();
|
|
}
|
|
|
|
// SRCVALUE nodes are ignored.
|
|
if (Rec->getName() == "srcvalue")
|
|
return false;
|
|
|
|
TreePatternNode *&Slot = InstInputs[Pat->getName()];
|
|
if (!Slot) {
|
|
Slot = Pat;
|
|
} else {
|
|
Record *SlotRec;
|
|
if (Slot->isLeaf()) {
|
|
SlotRec = dynamic_cast<DefInit*>(Slot->getLeafValue())->getDef();
|
|
} else {
|
|
assert(Slot->getNumChildren() == 0 && "can't be a use with children!");
|
|
SlotRec = Slot->getOperator();
|
|
}
|
|
|
|
// Ensure that the inputs agree if we've already seen this input.
|
|
if (Rec != SlotRec)
|
|
I->error("All $" + Pat->getName() + " inputs must agree with each other");
|
|
if (Slot->getExtTypes() != Pat->getExtTypes())
|
|
I->error("All $" + Pat->getName() + " inputs must agree with each other");
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// FindPatternInputsAndOutputs - Scan the specified TreePatternNode (which is
|
|
/// part of "I", the instruction), computing the set of inputs and outputs of
|
|
/// the pattern. Report errors if we see anything naughty.
|
|
void CodeGenDAGPatterns::
|
|
FindPatternInputsAndOutputs(TreePattern *I, TreePatternNode *Pat,
|
|
std::map<std::string, TreePatternNode*> &InstInputs,
|
|
std::map<std::string, TreePatternNode*>&InstResults,
|
|
std::vector<Record*> &InstImpInputs,
|
|
std::vector<Record*> &InstImpResults) {
|
|
if (Pat->isLeaf()) {
|
|
bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
|
|
if (!isUse && Pat->getTransformFn())
|
|
I->error("Cannot specify a transform function for a non-input value!");
|
|
return;
|
|
} else if (Pat->getOperator()->getName() == "implicit") {
|
|
for (unsigned i = 0, e = Pat->getNumChildren(); i != e; ++i) {
|
|
TreePatternNode *Dest = Pat->getChild(i);
|
|
if (!Dest->isLeaf())
|
|
I->error("implicitly defined value should be a register!");
|
|
|
|
DefInit *Val = dynamic_cast<DefInit*>(Dest->getLeafValue());
|
|
if (!Val || !Val->getDef()->isSubClassOf("Register"))
|
|
I->error("implicitly defined value should be a register!");
|
|
InstImpResults.push_back(Val->getDef());
|
|
}
|
|
return;
|
|
} else if (Pat->getOperator()->getName() != "set") {
|
|
// If this is not a set, verify that the children nodes are not void typed,
|
|
// and recurse.
|
|
for (unsigned i = 0, e = Pat->getNumChildren(); i != e; ++i) {
|
|
if (Pat->getChild(i)->getExtTypeNum(0) == MVT::isVoid)
|
|
I->error("Cannot have void nodes inside of patterns!");
|
|
FindPatternInputsAndOutputs(I, Pat->getChild(i), InstInputs, InstResults,
|
|
InstImpInputs, InstImpResults);
|
|
}
|
|
|
|
// If this is a non-leaf node with no children, treat it basically as if
|
|
// it were a leaf. This handles nodes like (imm).
|
|
bool isUse = HandleUse(I, Pat, InstInputs, InstImpInputs);
|
|
|
|
if (!isUse && Pat->getTransformFn())
|
|
I->error("Cannot specify a transform function for a non-input value!");
|
|
return;
|
|
}
|
|
|
|
// Otherwise, this is a set, validate and collect instruction results.
|
|
if (Pat->getNumChildren() == 0)
|
|
I->error("set requires operands!");
|
|
|
|
if (Pat->getTransformFn())
|
|
I->error("Cannot specify a transform function on a set node!");
|
|
|
|
// Check the set destinations.
|
|
unsigned NumDests = Pat->getNumChildren()-1;
|
|
for (unsigned i = 0; i != NumDests; ++i) {
|
|
TreePatternNode *Dest = Pat->getChild(i);
|
|
if (!Dest->isLeaf())
|
|
I->error("set destination should be a register!");
|
|
|
|
DefInit *Val = dynamic_cast<DefInit*>(Dest->getLeafValue());
|
|
if (!Val)
|
|
I->error("set destination should be a register!");
|
|
|
|
if (Val->getDef()->isSubClassOf("RegisterClass") ||
|
|
Val->getDef()->getName() == "ptr_rc") {
|
|
if (Dest->getName().empty())
|
|
I->error("set destination must have a name!");
|
|
if (InstResults.count(Dest->getName()))
|
|
I->error("cannot set '" + Dest->getName() +"' multiple times");
|
|
InstResults[Dest->getName()] = Dest;
|
|
} else if (Val->getDef()->isSubClassOf("Register")) {
|
|
InstImpResults.push_back(Val->getDef());
|
|
} else {
|
|
I->error("set destination should be a register!");
|
|
}
|
|
}
|
|
|
|
// Verify and collect info from the computation.
|
|
FindPatternInputsAndOutputs(I, Pat->getChild(NumDests),
|
|
InstInputs, InstResults,
|
|
InstImpInputs, InstImpResults);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Instruction Analysis
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
class InstAnalyzer {
|
|
const CodeGenDAGPatterns &CDP;
|
|
bool &mayStore;
|
|
bool &mayLoad;
|
|
bool &HasSideEffects;
|
|
public:
|
|
InstAnalyzer(const CodeGenDAGPatterns &cdp,
|
|
bool &maystore, bool &mayload, bool &hse)
|
|
: CDP(cdp), mayStore(maystore), mayLoad(mayload), HasSideEffects(hse){
|
|
}
|
|
|
|
/// Analyze - Analyze the specified instruction, returning true if the
|
|
/// instruction had a pattern.
|
|
bool Analyze(Record *InstRecord) {
|
|
const TreePattern *Pattern = CDP.getInstruction(InstRecord).getPattern();
|
|
if (Pattern == 0) {
|
|
HasSideEffects = 1;
|
|
return false; // No pattern.
|
|
}
|
|
|
|
// FIXME: Assume only the first tree is the pattern. The others are clobber
|
|
// nodes.
|
|
AnalyzeNode(Pattern->getTree(0));
|
|
return true;
|
|
}
|
|
|
|
private:
|
|
void AnalyzeNode(const TreePatternNode *N) {
|
|
if (N->isLeaf()) {
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
|
|
Record *LeafRec = DI->getDef();
|
|
// Handle ComplexPattern leaves.
|
|
if (LeafRec->isSubClassOf("ComplexPattern")) {
|
|
const ComplexPattern &CP = CDP.getComplexPattern(LeafRec);
|
|
if (CP.hasProperty(SDNPMayStore)) mayStore = true;
|
|
if (CP.hasProperty(SDNPMayLoad)) mayLoad = true;
|
|
if (CP.hasProperty(SDNPSideEffect)) HasSideEffects = true;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
// Analyze children.
|
|
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
|
|
AnalyzeNode(N->getChild(i));
|
|
|
|
// Ignore set nodes, which are not SDNodes.
|
|
if (N->getOperator()->getName() == "set")
|
|
return;
|
|
|
|
// Get information about the SDNode for the operator.
|
|
const SDNodeInfo &OpInfo = CDP.getSDNodeInfo(N->getOperator());
|
|
|
|
// Notice properties of the node.
|
|
if (OpInfo.hasProperty(SDNPMayStore)) mayStore = true;
|
|
if (OpInfo.hasProperty(SDNPMayLoad)) mayLoad = true;
|
|
if (OpInfo.hasProperty(SDNPSideEffect)) HasSideEffects = true;
|
|
|
|
if (const CodeGenIntrinsic *IntInfo = N->getIntrinsicInfo(CDP)) {
|
|
// If this is an intrinsic, analyze it.
|
|
if (IntInfo->ModRef >= CodeGenIntrinsic::ReadArgMem)
|
|
mayLoad = true;// These may load memory.
|
|
|
|
if (IntInfo->ModRef >= CodeGenIntrinsic::WriteArgMem)
|
|
mayStore = true;// Intrinsics that can write to memory are 'mayStore'.
|
|
|
|
if (IntInfo->ModRef >= CodeGenIntrinsic::WriteMem)
|
|
// WriteMem intrinsics can have other strange effects.
|
|
HasSideEffects = true;
|
|
}
|
|
}
|
|
|
|
};
|
|
|
|
static void InferFromPattern(const CodeGenInstruction &Inst,
|
|
bool &MayStore, bool &MayLoad,
|
|
bool &HasSideEffects,
|
|
const CodeGenDAGPatterns &CDP) {
|
|
MayStore = MayLoad = HasSideEffects = false;
|
|
|
|
bool HadPattern =
|
|
InstAnalyzer(CDP, MayStore, MayLoad, HasSideEffects).Analyze(Inst.TheDef);
|
|
|
|
// InstAnalyzer only correctly analyzes mayStore/mayLoad so far.
|
|
if (Inst.mayStore) { // If the .td file explicitly sets mayStore, use it.
|
|
// If we decided that this is a store from the pattern, then the .td file
|
|
// entry is redundant.
|
|
if (MayStore)
|
|
fprintf(stderr,
|
|
"Warning: mayStore flag explicitly set on instruction '%s'"
|
|
" but flag already inferred from pattern.\n",
|
|
Inst.TheDef->getName().c_str());
|
|
MayStore = true;
|
|
}
|
|
|
|
if (Inst.mayLoad) { // If the .td file explicitly sets mayLoad, use it.
|
|
// If we decided that this is a load from the pattern, then the .td file
|
|
// entry is redundant.
|
|
if (MayLoad)
|
|
fprintf(stderr,
|
|
"Warning: mayLoad flag explicitly set on instruction '%s'"
|
|
" but flag already inferred from pattern.\n",
|
|
Inst.TheDef->getName().c_str());
|
|
MayLoad = true;
|
|
}
|
|
|
|
if (Inst.neverHasSideEffects) {
|
|
if (HadPattern)
|
|
fprintf(stderr, "Warning: neverHasSideEffects set on instruction '%s' "
|
|
"which already has a pattern\n", Inst.TheDef->getName().c_str());
|
|
HasSideEffects = false;
|
|
}
|
|
|
|
if (Inst.hasSideEffects) {
|
|
if (HasSideEffects)
|
|
fprintf(stderr, "Warning: hasSideEffects set on instruction '%s' "
|
|
"which already inferred this.\n", Inst.TheDef->getName().c_str());
|
|
HasSideEffects = true;
|
|
}
|
|
}
|
|
|
|
/// ParseInstructions - Parse all of the instructions, inlining and resolving
|
|
/// any fragments involved. This populates the Instructions list with fully
|
|
/// resolved instructions.
|
|
void CodeGenDAGPatterns::ParseInstructions() {
|
|
std::vector<Record*> Instrs = Records.getAllDerivedDefinitions("Instruction");
|
|
|
|
for (unsigned i = 0, e = Instrs.size(); i != e; ++i) {
|
|
ListInit *LI = 0;
|
|
|
|
if (dynamic_cast<ListInit*>(Instrs[i]->getValueInit("Pattern")))
|
|
LI = Instrs[i]->getValueAsListInit("Pattern");
|
|
|
|
// If there is no pattern, only collect minimal information about the
|
|
// instruction for its operand list. We have to assume that there is one
|
|
// result, as we have no detailed info.
|
|
if (!LI || LI->getSize() == 0) {
|
|
std::vector<Record*> Results;
|
|
std::vector<Record*> Operands;
|
|
|
|
CodeGenInstruction &InstInfo =Target.getInstruction(Instrs[i]->getName());
|
|
|
|
if (InstInfo.OperandList.size() != 0) {
|
|
if (InstInfo.NumDefs == 0) {
|
|
// These produce no results
|
|
for (unsigned j = 0, e = InstInfo.OperandList.size(); j < e; ++j)
|
|
Operands.push_back(InstInfo.OperandList[j].Rec);
|
|
} else {
|
|
// Assume the first operand is the result.
|
|
Results.push_back(InstInfo.OperandList[0].Rec);
|
|
|
|
// The rest are inputs.
|
|
for (unsigned j = 1, e = InstInfo.OperandList.size(); j < e; ++j)
|
|
Operands.push_back(InstInfo.OperandList[j].Rec);
|
|
}
|
|
}
|
|
|
|
// Create and insert the instruction.
|
|
std::vector<Record*> ImpResults;
|
|
std::vector<Record*> ImpOperands;
|
|
Instructions.insert(std::make_pair(Instrs[i],
|
|
DAGInstruction(0, Results, Operands, ImpResults,
|
|
ImpOperands)));
|
|
continue; // no pattern.
|
|
}
|
|
|
|
// Parse the instruction.
|
|
TreePattern *I = new TreePattern(Instrs[i], LI, true, *this);
|
|
// Inline pattern fragments into it.
|
|
I->InlinePatternFragments();
|
|
|
|
// Infer as many types as possible. If we cannot infer all of them, we can
|
|
// never do anything with this instruction pattern: report it to the user.
|
|
if (!I->InferAllTypes())
|
|
I->error("Could not infer all types in pattern!");
|
|
|
|
// InstInputs - Keep track of all of the inputs of the instruction, along
|
|
// with the record they are declared as.
|
|
std::map<std::string, TreePatternNode*> InstInputs;
|
|
|
|
// InstResults - Keep track of all the virtual registers that are 'set'
|
|
// in the instruction, including what reg class they are.
|
|
std::map<std::string, TreePatternNode*> InstResults;
|
|
|
|
std::vector<Record*> InstImpInputs;
|
|
std::vector<Record*> InstImpResults;
|
|
|
|
// Verify that the top-level forms in the instruction are of void type, and
|
|
// fill in the InstResults map.
|
|
for (unsigned j = 0, e = I->getNumTrees(); j != e; ++j) {
|
|
TreePatternNode *Pat = I->getTree(j);
|
|
if (Pat->getExtTypeNum(0) != MVT::isVoid)
|
|
I->error("Top-level forms in instruction pattern should have"
|
|
" void types");
|
|
|
|
// Find inputs and outputs, and verify the structure of the uses/defs.
|
|
FindPatternInputsAndOutputs(I, Pat, InstInputs, InstResults,
|
|
InstImpInputs, InstImpResults);
|
|
}
|
|
|
|
// Now that we have inputs and outputs of the pattern, inspect the operands
|
|
// list for the instruction. This determines the order that operands are
|
|
// added to the machine instruction the node corresponds to.
|
|
unsigned NumResults = InstResults.size();
|
|
|
|
// Parse the operands list from the (ops) list, validating it.
|
|
assert(I->getArgList().empty() && "Args list should still be empty here!");
|
|
CodeGenInstruction &CGI = Target.getInstruction(Instrs[i]->getName());
|
|
|
|
// Check that all of the results occur first in the list.
|
|
std::vector<Record*> Results;
|
|
TreePatternNode *Res0Node = NULL;
|
|
for (unsigned i = 0; i != NumResults; ++i) {
|
|
if (i == CGI.OperandList.size())
|
|
I->error("'" + InstResults.begin()->first +
|
|
"' set but does not appear in operand list!");
|
|
const std::string &OpName = CGI.OperandList[i].Name;
|
|
|
|
// Check that it exists in InstResults.
|
|
TreePatternNode *RNode = InstResults[OpName];
|
|
if (RNode == 0)
|
|
I->error("Operand $" + OpName + " does not exist in operand list!");
|
|
|
|
if (i == 0)
|
|
Res0Node = RNode;
|
|
Record *R = dynamic_cast<DefInit*>(RNode->getLeafValue())->getDef();
|
|
if (R == 0)
|
|
I->error("Operand $" + OpName + " should be a set destination: all "
|
|
"outputs must occur before inputs in operand list!");
|
|
|
|
if (CGI.OperandList[i].Rec != R)
|
|
I->error("Operand $" + OpName + " class mismatch!");
|
|
|
|
// Remember the return type.
|
|
Results.push_back(CGI.OperandList[i].Rec);
|
|
|
|
// Okay, this one checks out.
|
|
InstResults.erase(OpName);
|
|
}
|
|
|
|
// Loop over the inputs next. Make a copy of InstInputs so we can destroy
|
|
// the copy while we're checking the inputs.
|
|
std::map<std::string, TreePatternNode*> InstInputsCheck(InstInputs);
|
|
|
|
std::vector<TreePatternNode*> ResultNodeOperands;
|
|
std::vector<Record*> Operands;
|
|
for (unsigned i = NumResults, e = CGI.OperandList.size(); i != e; ++i) {
|
|
CodeGenInstruction::OperandInfo &Op = CGI.OperandList[i];
|
|
const std::string &OpName = Op.Name;
|
|
if (OpName.empty())
|
|
I->error("Operand #" + utostr(i) + " in operands list has no name!");
|
|
|
|
if (!InstInputsCheck.count(OpName)) {
|
|
// If this is an predicate operand or optional def operand with an
|
|
// DefaultOps set filled in, we can ignore this. When we codegen it,
|
|
// we will do so as always executed.
|
|
if (Op.Rec->isSubClassOf("PredicateOperand") ||
|
|
Op.Rec->isSubClassOf("OptionalDefOperand")) {
|
|
// Does it have a non-empty DefaultOps field? If so, ignore this
|
|
// operand.
|
|
if (!getDefaultOperand(Op.Rec).DefaultOps.empty())
|
|
continue;
|
|
}
|
|
I->error("Operand $" + OpName +
|
|
" does not appear in the instruction pattern");
|
|
}
|
|
TreePatternNode *InVal = InstInputsCheck[OpName];
|
|
InstInputsCheck.erase(OpName); // It occurred, remove from map.
|
|
|
|
if (InVal->isLeaf() &&
|
|
dynamic_cast<DefInit*>(InVal->getLeafValue())) {
|
|
Record *InRec = static_cast<DefInit*>(InVal->getLeafValue())->getDef();
|
|
if (Op.Rec != InRec && !InRec->isSubClassOf("ComplexPattern"))
|
|
I->error("Operand $" + OpName + "'s register class disagrees"
|
|
" between the operand and pattern");
|
|
}
|
|
Operands.push_back(Op.Rec);
|
|
|
|
// Construct the result for the dest-pattern operand list.
|
|
TreePatternNode *OpNode = InVal->clone();
|
|
|
|
// No predicate is useful on the result.
|
|
OpNode->clearPredicateFns();
|
|
|
|
// Promote the xform function to be an explicit node if set.
|
|
if (Record *Xform = OpNode->getTransformFn()) {
|
|
OpNode->setTransformFn(0);
|
|
std::vector<TreePatternNode*> Children;
|
|
Children.push_back(OpNode);
|
|
OpNode = new TreePatternNode(Xform, Children);
|
|
}
|
|
|
|
ResultNodeOperands.push_back(OpNode);
|
|
}
|
|
|
|
if (!InstInputsCheck.empty())
|
|
I->error("Input operand $" + InstInputsCheck.begin()->first +
|
|
" occurs in pattern but not in operands list!");
|
|
|
|
TreePatternNode *ResultPattern =
|
|
new TreePatternNode(I->getRecord(), ResultNodeOperands);
|
|
// Copy fully inferred output node type to instruction result pattern.
|
|
if (NumResults > 0)
|
|
ResultPattern->setTypes(Res0Node->getExtTypes());
|
|
|
|
// Create and insert the instruction.
|
|
// FIXME: InstImpResults and InstImpInputs should not be part of
|
|
// DAGInstruction.
|
|
DAGInstruction TheInst(I, Results, Operands, InstImpResults, InstImpInputs);
|
|
Instructions.insert(std::make_pair(I->getRecord(), TheInst));
|
|
|
|
// Use a temporary tree pattern to infer all types and make sure that the
|
|
// constructed result is correct. This depends on the instruction already
|
|
// being inserted into the Instructions map.
|
|
TreePattern Temp(I->getRecord(), ResultPattern, false, *this);
|
|
Temp.InferAllTypes();
|
|
|
|
DAGInstruction &TheInsertedInst = Instructions.find(I->getRecord())->second;
|
|
TheInsertedInst.setResultPattern(Temp.getOnlyTree());
|
|
|
|
DEBUG(I->dump());
|
|
}
|
|
|
|
// If we can, convert the instructions to be patterns that are matched!
|
|
for (std::map<Record*, DAGInstruction>::iterator II = Instructions.begin(),
|
|
E = Instructions.end(); II != E; ++II) {
|
|
DAGInstruction &TheInst = II->second;
|
|
const TreePattern *I = TheInst.getPattern();
|
|
if (I == 0) continue; // No pattern.
|
|
|
|
// FIXME: Assume only the first tree is the pattern. The others are clobber
|
|
// nodes.
|
|
TreePatternNode *Pattern = I->getTree(0);
|
|
TreePatternNode *SrcPattern;
|
|
if (Pattern->getOperator()->getName() == "set") {
|
|
SrcPattern = Pattern->getChild(Pattern->getNumChildren()-1)->clone();
|
|
} else{
|
|
// Not a set (store or something?)
|
|
SrcPattern = Pattern;
|
|
}
|
|
|
|
std::string Reason;
|
|
if (!SrcPattern->canPatternMatch(Reason, *this))
|
|
I->error("Instruction can never match: " + Reason);
|
|
|
|
Record *Instr = II->first;
|
|
TreePatternNode *DstPattern = TheInst.getResultPattern();
|
|
PatternsToMatch.
|
|
push_back(PatternToMatch(Instr->getValueAsListInit("Predicates"),
|
|
SrcPattern, DstPattern, TheInst.getImpResults(),
|
|
Instr->getValueAsInt("AddedComplexity")));
|
|
}
|
|
}
|
|
|
|
|
|
void CodeGenDAGPatterns::InferInstructionFlags() {
|
|
std::map<std::string, CodeGenInstruction> &InstrDescs =
|
|
Target.getInstructions();
|
|
for (std::map<std::string, CodeGenInstruction>::iterator
|
|
II = InstrDescs.begin(), E = InstrDescs.end(); II != E; ++II) {
|
|
CodeGenInstruction &InstInfo = II->second;
|
|
// Determine properties of the instruction from its pattern.
|
|
bool MayStore, MayLoad, HasSideEffects;
|
|
InferFromPattern(InstInfo, MayStore, MayLoad, HasSideEffects, *this);
|
|
InstInfo.mayStore = MayStore;
|
|
InstInfo.mayLoad = MayLoad;
|
|
InstInfo.hasSideEffects = HasSideEffects;
|
|
}
|
|
}
|
|
|
|
void CodeGenDAGPatterns::ParsePatterns() {
|
|
std::vector<Record*> Patterns = Records.getAllDerivedDefinitions("Pattern");
|
|
|
|
for (unsigned i = 0, e = Patterns.size(); i != e; ++i) {
|
|
DagInit *Tree = Patterns[i]->getValueAsDag("PatternToMatch");
|
|
DefInit *OpDef = dynamic_cast<DefInit*>(Tree->getOperator());
|
|
Record *Operator = OpDef->getDef();
|
|
TreePattern *Pattern;
|
|
if (Operator->getName() != "parallel")
|
|
Pattern = new TreePattern(Patterns[i], Tree, true, *this);
|
|
else {
|
|
std::vector<Init*> Values;
|
|
for (unsigned j = 0, ee = Tree->getNumArgs(); j != ee; ++j)
|
|
Values.push_back(Tree->getArg(j));
|
|
ListInit *LI = new ListInit(Values);
|
|
Pattern = new TreePattern(Patterns[i], LI, true, *this);
|
|
}
|
|
|
|
// Inline pattern fragments into it.
|
|
Pattern->InlinePatternFragments();
|
|
|
|
ListInit *LI = Patterns[i]->getValueAsListInit("ResultInstrs");
|
|
if (LI->getSize() == 0) continue; // no pattern.
|
|
|
|
// Parse the instruction.
|
|
TreePattern *Result = new TreePattern(Patterns[i], LI, false, *this);
|
|
|
|
// Inline pattern fragments into it.
|
|
Result->InlinePatternFragments();
|
|
|
|
if (Result->getNumTrees() != 1)
|
|
Result->error("Cannot handle instructions producing instructions "
|
|
"with temporaries yet!");
|
|
|
|
bool IterateInference;
|
|
bool InferredAllPatternTypes, InferredAllResultTypes;
|
|
do {
|
|
// Infer as many types as possible. If we cannot infer all of them, we
|
|
// can never do anything with this pattern: report it to the user.
|
|
InferredAllPatternTypes = Pattern->InferAllTypes();
|
|
|
|
// Infer as many types as possible. If we cannot infer all of them, we
|
|
// can never do anything with this pattern: report it to the user.
|
|
InferredAllResultTypes = Result->InferAllTypes();
|
|
|
|
// Apply the type of the result to the source pattern. This helps us
|
|
// resolve cases where the input type is known to be a pointer type (which
|
|
// is considered resolved), but the result knows it needs to be 32- or
|
|
// 64-bits. Infer the other way for good measure.
|
|
IterateInference = Pattern->getTree(0)->
|
|
UpdateNodeType(Result->getTree(0)->getExtTypes(), *Result);
|
|
IterateInference |= Result->getTree(0)->
|
|
UpdateNodeType(Pattern->getTree(0)->getExtTypes(), *Result);
|
|
} while (IterateInference);
|
|
|
|
// Verify that we inferred enough types that we can do something with the
|
|
// pattern and result. If these fire the user has to add type casts.
|
|
if (!InferredAllPatternTypes)
|
|
Pattern->error("Could not infer all types in pattern!");
|
|
if (!InferredAllResultTypes)
|
|
Result->error("Could not infer all types in pattern result!");
|
|
|
|
// Validate that the input pattern is correct.
|
|
std::map<std::string, TreePatternNode*> InstInputs;
|
|
std::map<std::string, TreePatternNode*> InstResults;
|
|
std::vector<Record*> InstImpInputs;
|
|
std::vector<Record*> InstImpResults;
|
|
for (unsigned j = 0, ee = Pattern->getNumTrees(); j != ee; ++j)
|
|
FindPatternInputsAndOutputs(Pattern, Pattern->getTree(j),
|
|
InstInputs, InstResults,
|
|
InstImpInputs, InstImpResults);
|
|
|
|
// Promote the xform function to be an explicit node if set.
|
|
TreePatternNode *DstPattern = Result->getOnlyTree();
|
|
std::vector<TreePatternNode*> ResultNodeOperands;
|
|
for (unsigned ii = 0, ee = DstPattern->getNumChildren(); ii != ee; ++ii) {
|
|
TreePatternNode *OpNode = DstPattern->getChild(ii);
|
|
if (Record *Xform = OpNode->getTransformFn()) {
|
|
OpNode->setTransformFn(0);
|
|
std::vector<TreePatternNode*> Children;
|
|
Children.push_back(OpNode);
|
|
OpNode = new TreePatternNode(Xform, Children);
|
|
}
|
|
ResultNodeOperands.push_back(OpNode);
|
|
}
|
|
DstPattern = Result->getOnlyTree();
|
|
if (!DstPattern->isLeaf())
|
|
DstPattern = new TreePatternNode(DstPattern->getOperator(),
|
|
ResultNodeOperands);
|
|
DstPattern->setTypes(Result->getOnlyTree()->getExtTypes());
|
|
TreePattern Temp(Result->getRecord(), DstPattern, false, *this);
|
|
Temp.InferAllTypes();
|
|
|
|
std::string Reason;
|
|
if (!Pattern->getTree(0)->canPatternMatch(Reason, *this))
|
|
Pattern->error("Pattern can never match: " + Reason);
|
|
|
|
PatternsToMatch.
|
|
push_back(PatternToMatch(Patterns[i]->getValueAsListInit("Predicates"),
|
|
Pattern->getTree(0),
|
|
Temp.getOnlyTree(), InstImpResults,
|
|
Patterns[i]->getValueAsInt("AddedComplexity")));
|
|
}
|
|
}
|
|
|
|
/// CombineChildVariants - Given a bunch of permutations of each child of the
|
|
/// 'operator' node, put them together in all possible ways.
|
|
static void CombineChildVariants(TreePatternNode *Orig,
|
|
const std::vector<std::vector<TreePatternNode*> > &ChildVariants,
|
|
std::vector<TreePatternNode*> &OutVariants,
|
|
CodeGenDAGPatterns &CDP,
|
|
const MultipleUseVarSet &DepVars) {
|
|
// Make sure that each operand has at least one variant to choose from.
|
|
for (unsigned i = 0, e = ChildVariants.size(); i != e; ++i)
|
|
if (ChildVariants[i].empty())
|
|
return;
|
|
|
|
// The end result is an all-pairs construction of the resultant pattern.
|
|
std::vector<unsigned> Idxs;
|
|
Idxs.resize(ChildVariants.size());
|
|
bool NotDone;
|
|
do {
|
|
#ifndef NDEBUG
|
|
if (DebugFlag && !Idxs.empty()) {
|
|
cerr << Orig->getOperator()->getName() << ": Idxs = [ ";
|
|
for (unsigned i = 0; i < Idxs.size(); ++i) {
|
|
cerr << Idxs[i] << " ";
|
|
}
|
|
cerr << "]\n";
|
|
}
|
|
#endif
|
|
// Create the variant and add it to the output list.
|
|
std::vector<TreePatternNode*> NewChildren;
|
|
for (unsigned i = 0, e = ChildVariants.size(); i != e; ++i)
|
|
NewChildren.push_back(ChildVariants[i][Idxs[i]]);
|
|
TreePatternNode *R = new TreePatternNode(Orig->getOperator(), NewChildren);
|
|
|
|
// Copy over properties.
|
|
R->setName(Orig->getName());
|
|
R->setPredicateFns(Orig->getPredicateFns());
|
|
R->setTransformFn(Orig->getTransformFn());
|
|
R->setTypes(Orig->getExtTypes());
|
|
|
|
// If this pattern cannot match, do not include it as a variant.
|
|
std::string ErrString;
|
|
if (!R->canPatternMatch(ErrString, CDP)) {
|
|
delete R;
|
|
} else {
|
|
bool AlreadyExists = false;
|
|
|
|
// Scan to see if this pattern has already been emitted. We can get
|
|
// duplication due to things like commuting:
|
|
// (and GPRC:$a, GPRC:$b) -> (and GPRC:$b, GPRC:$a)
|
|
// which are the same pattern. Ignore the dups.
|
|
for (unsigned i = 0, e = OutVariants.size(); i != e; ++i)
|
|
if (R->isIsomorphicTo(OutVariants[i], DepVars)) {
|
|
AlreadyExists = true;
|
|
break;
|
|
}
|
|
|
|
if (AlreadyExists)
|
|
delete R;
|
|
else
|
|
OutVariants.push_back(R);
|
|
}
|
|
|
|
// Increment indices to the next permutation by incrementing the
|
|
// indicies from last index backward, e.g., generate the sequence
|
|
// [0, 0], [0, 1], [1, 0], [1, 1].
|
|
int IdxsIdx;
|
|
for (IdxsIdx = Idxs.size() - 1; IdxsIdx >= 0; --IdxsIdx) {
|
|
if (++Idxs[IdxsIdx] == ChildVariants[IdxsIdx].size())
|
|
Idxs[IdxsIdx] = 0;
|
|
else
|
|
break;
|
|
}
|
|
NotDone = (IdxsIdx >= 0);
|
|
} while (NotDone);
|
|
}
|
|
|
|
/// CombineChildVariants - A helper function for binary operators.
|
|
///
|
|
static void CombineChildVariants(TreePatternNode *Orig,
|
|
const std::vector<TreePatternNode*> &LHS,
|
|
const std::vector<TreePatternNode*> &RHS,
|
|
std::vector<TreePatternNode*> &OutVariants,
|
|
CodeGenDAGPatterns &CDP,
|
|
const MultipleUseVarSet &DepVars) {
|
|
std::vector<std::vector<TreePatternNode*> > ChildVariants;
|
|
ChildVariants.push_back(LHS);
|
|
ChildVariants.push_back(RHS);
|
|
CombineChildVariants(Orig, ChildVariants, OutVariants, CDP, DepVars);
|
|
}
|
|
|
|
|
|
static void GatherChildrenOfAssociativeOpcode(TreePatternNode *N,
|
|
std::vector<TreePatternNode *> &Children) {
|
|
assert(N->getNumChildren()==2 &&"Associative but doesn't have 2 children!");
|
|
Record *Operator = N->getOperator();
|
|
|
|
// Only permit raw nodes.
|
|
if (!N->getName().empty() || !N->getPredicateFns().empty() ||
|
|
N->getTransformFn()) {
|
|
Children.push_back(N);
|
|
return;
|
|
}
|
|
|
|
if (N->getChild(0)->isLeaf() || N->getChild(0)->getOperator() != Operator)
|
|
Children.push_back(N->getChild(0));
|
|
else
|
|
GatherChildrenOfAssociativeOpcode(N->getChild(0), Children);
|
|
|
|
if (N->getChild(1)->isLeaf() || N->getChild(1)->getOperator() != Operator)
|
|
Children.push_back(N->getChild(1));
|
|
else
|
|
GatherChildrenOfAssociativeOpcode(N->getChild(1), Children);
|
|
}
|
|
|
|
/// GenerateVariantsOf - Given a pattern N, generate all permutations we can of
|
|
/// the (potentially recursive) pattern by using algebraic laws.
|
|
///
|
|
static void GenerateVariantsOf(TreePatternNode *N,
|
|
std::vector<TreePatternNode*> &OutVariants,
|
|
CodeGenDAGPatterns &CDP,
|
|
const MultipleUseVarSet &DepVars) {
|
|
// We cannot permute leaves.
|
|
if (N->isLeaf()) {
|
|
OutVariants.push_back(N);
|
|
return;
|
|
}
|
|
|
|
// Look up interesting info about the node.
|
|
const SDNodeInfo &NodeInfo = CDP.getSDNodeInfo(N->getOperator());
|
|
|
|
// If this node is associative, re-associate.
|
|
if (NodeInfo.hasProperty(SDNPAssociative)) {
|
|
// Re-associate by pulling together all of the linked operators
|
|
std::vector<TreePatternNode*> MaximalChildren;
|
|
GatherChildrenOfAssociativeOpcode(N, MaximalChildren);
|
|
|
|
// Only handle child sizes of 3. Otherwise we'll end up trying too many
|
|
// permutations.
|
|
if (MaximalChildren.size() == 3) {
|
|
// Find the variants of all of our maximal children.
|
|
std::vector<TreePatternNode*> AVariants, BVariants, CVariants;
|
|
GenerateVariantsOf(MaximalChildren[0], AVariants, CDP, DepVars);
|
|
GenerateVariantsOf(MaximalChildren[1], BVariants, CDP, DepVars);
|
|
GenerateVariantsOf(MaximalChildren[2], CVariants, CDP, DepVars);
|
|
|
|
// There are only two ways we can permute the tree:
|
|
// (A op B) op C and A op (B op C)
|
|
// Within these forms, we can also permute A/B/C.
|
|
|
|
// Generate legal pair permutations of A/B/C.
|
|
std::vector<TreePatternNode*> ABVariants;
|
|
std::vector<TreePatternNode*> BAVariants;
|
|
std::vector<TreePatternNode*> ACVariants;
|
|
std::vector<TreePatternNode*> CAVariants;
|
|
std::vector<TreePatternNode*> BCVariants;
|
|
std::vector<TreePatternNode*> CBVariants;
|
|
CombineChildVariants(N, AVariants, BVariants, ABVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BVariants, AVariants, BAVariants, CDP, DepVars);
|
|
CombineChildVariants(N, AVariants, CVariants, ACVariants, CDP, DepVars);
|
|
CombineChildVariants(N, CVariants, AVariants, CAVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BVariants, CVariants, BCVariants, CDP, DepVars);
|
|
CombineChildVariants(N, CVariants, BVariants, CBVariants, CDP, DepVars);
|
|
|
|
// Combine those into the result: (x op x) op x
|
|
CombineChildVariants(N, ABVariants, CVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BAVariants, CVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, ACVariants, BVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, CAVariants, BVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BCVariants, AVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, CBVariants, AVariants, OutVariants, CDP, DepVars);
|
|
|
|
// Combine those into the result: x op (x op x)
|
|
CombineChildVariants(N, CVariants, ABVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, CVariants, BAVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BVariants, ACVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, BVariants, CAVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, AVariants, BCVariants, OutVariants, CDP, DepVars);
|
|
CombineChildVariants(N, AVariants, CBVariants, OutVariants, CDP, DepVars);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Compute permutations of all children.
|
|
std::vector<std::vector<TreePatternNode*> > ChildVariants;
|
|
ChildVariants.resize(N->getNumChildren());
|
|
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
|
|
GenerateVariantsOf(N->getChild(i), ChildVariants[i], CDP, DepVars);
|
|
|
|
// Build all permutations based on how the children were formed.
|
|
CombineChildVariants(N, ChildVariants, OutVariants, CDP, DepVars);
|
|
|
|
// If this node is commutative, consider the commuted order.
|
|
bool isCommIntrinsic = N->isCommutativeIntrinsic(CDP);
|
|
if (NodeInfo.hasProperty(SDNPCommutative) || isCommIntrinsic) {
|
|
assert((N->getNumChildren()==2 || isCommIntrinsic) &&
|
|
"Commutative but doesn't have 2 children!");
|
|
// Don't count children which are actually register references.
|
|
unsigned NC = 0;
|
|
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
|
|
TreePatternNode *Child = N->getChild(i);
|
|
if (Child->isLeaf())
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
|
|
Record *RR = DI->getDef();
|
|
if (RR->isSubClassOf("Register"))
|
|
continue;
|
|
}
|
|
NC++;
|
|
}
|
|
// Consider the commuted order.
|
|
if (isCommIntrinsic) {
|
|
// Commutative intrinsic. First operand is the intrinsic id, 2nd and 3rd
|
|
// operands are the commutative operands, and there might be more operands
|
|
// after those.
|
|
assert(NC >= 3 &&
|
|
"Commutative intrinsic should have at least 3 childrean!");
|
|
std::vector<std::vector<TreePatternNode*> > Variants;
|
|
Variants.push_back(ChildVariants[0]); // Intrinsic id.
|
|
Variants.push_back(ChildVariants[2]);
|
|
Variants.push_back(ChildVariants[1]);
|
|
for (unsigned i = 3; i != NC; ++i)
|
|
Variants.push_back(ChildVariants[i]);
|
|
CombineChildVariants(N, Variants, OutVariants, CDP, DepVars);
|
|
} else if (NC == 2)
|
|
CombineChildVariants(N, ChildVariants[1], ChildVariants[0],
|
|
OutVariants, CDP, DepVars);
|
|
}
|
|
}
|
|
|
|
|
|
// GenerateVariants - Generate variants. For example, commutative patterns can
|
|
// match multiple ways. Add them to PatternsToMatch as well.
|
|
void CodeGenDAGPatterns::GenerateVariants() {
|
|
DOUT << "Generating instruction variants.\n";
|
|
|
|
// Loop over all of the patterns we've collected, checking to see if we can
|
|
// generate variants of the instruction, through the exploitation of
|
|
// identities. This permits the target to provide aggressive matching without
|
|
// the .td file having to contain tons of variants of instructions.
|
|
//
|
|
// Note that this loop adds new patterns to the PatternsToMatch list, but we
|
|
// intentionally do not reconsider these. Any variants of added patterns have
|
|
// already been added.
|
|
//
|
|
for (unsigned i = 0, e = PatternsToMatch.size(); i != e; ++i) {
|
|
MultipleUseVarSet DepVars;
|
|
std::vector<TreePatternNode*> Variants;
|
|
FindDepVars(PatternsToMatch[i].getSrcPattern(), DepVars);
|
|
DOUT << "Dependent/multiply used variables: ";
|
|
DEBUG(DumpDepVars(DepVars));
|
|
DOUT << "\n";
|
|
GenerateVariantsOf(PatternsToMatch[i].getSrcPattern(), Variants, *this, DepVars);
|
|
|
|
assert(!Variants.empty() && "Must create at least original variant!");
|
|
Variants.erase(Variants.begin()); // Remove the original pattern.
|
|
|
|
if (Variants.empty()) // No variants for this pattern.
|
|
continue;
|
|
|
|
DOUT << "FOUND VARIANTS OF: ";
|
|
DEBUG(PatternsToMatch[i].getSrcPattern()->dump());
|
|
DOUT << "\n";
|
|
|
|
for (unsigned v = 0, e = Variants.size(); v != e; ++v) {
|
|
TreePatternNode *Variant = Variants[v];
|
|
|
|
DOUT << " VAR#" << v << ": ";
|
|
DEBUG(Variant->dump());
|
|
DOUT << "\n";
|
|
|
|
// Scan to see if an instruction or explicit pattern already matches this.
|
|
bool AlreadyExists = false;
|
|
for (unsigned p = 0, e = PatternsToMatch.size(); p != e; ++p) {
|
|
// Check to see if this variant already exists.
|
|
if (Variant->isIsomorphicTo(PatternsToMatch[p].getSrcPattern(), DepVars)) {
|
|
DOUT << " *** ALREADY EXISTS, ignoring variant.\n";
|
|
AlreadyExists = true;
|
|
break;
|
|
}
|
|
}
|
|
// If we already have it, ignore the variant.
|
|
if (AlreadyExists) continue;
|
|
|
|
// Otherwise, add it to the list of patterns we have.
|
|
PatternsToMatch.
|
|
push_back(PatternToMatch(PatternsToMatch[i].getPredicates(),
|
|
Variant, PatternsToMatch[i].getDstPattern(),
|
|
PatternsToMatch[i].getDstRegs(),
|
|
PatternsToMatch[i].getAddedComplexity()));
|
|
}
|
|
|
|
DOUT << "\n";
|
|
}
|
|
}
|
|
|