mirror of
https://github.com/c64scene-ar/llvm-6502.git
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eeb3a00b84
clear what information these functions are actually using.
This is also a micro-optimization, as passing a SDNode * around is
simpler than passing a { SDNode *, int } by value or reference.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92564 91177308-0d34-0410-b5e6-96231b3b80d8
2069 lines
83 KiB
C++
2069 lines
83 KiB
C++
//===- DAGISelEmitter.cpp - Generate an instruction selector --------------===//
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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 tablegen backend emits a DAG instruction selector.
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//
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//===----------------------------------------------------------------------===//
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#include "DAGISelEmitter.h"
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#include "Record.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/Debug.h"
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#include <algorithm>
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#include <deque>
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#include <iostream>
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using namespace llvm;
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static cl::opt<bool>
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GenDebug("gen-debug", cl::desc("Generate debug code"), cl::init(false));
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//===----------------------------------------------------------------------===//
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// DAGISelEmitter Helper methods
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//
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/// getNodeName - The top level Select_* functions have an "SDNode* N"
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/// argument. When expanding the pattern-matching code, the intermediate
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/// variables have type SDValue. This function provides a uniform way to
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/// reference the underlying "SDNode *" for both cases.
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static std::string getNodeName(const std::string &S) {
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if (S == "N") return S;
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return S + ".getNode()";
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}
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/// getNodeValue - Similar to getNodeName, except it provides a uniform
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/// way to access the SDValue for both cases.
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static std::string getValueName(const std::string &S) {
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if (S == "N") return "SDValue(N, 0)";
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return S;
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}
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/// NodeIsComplexPattern - return true if N is a leaf node and a subclass of
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/// ComplexPattern.
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static bool NodeIsComplexPattern(TreePatternNode *N) {
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return (N->isLeaf() &&
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dynamic_cast<DefInit*>(N->getLeafValue()) &&
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static_cast<DefInit*>(N->getLeafValue())->getDef()->
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isSubClassOf("ComplexPattern"));
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}
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/// NodeGetComplexPattern - return the pointer to the ComplexPattern if N
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/// is a leaf node and a subclass of ComplexPattern, else it returns NULL.
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static const ComplexPattern *NodeGetComplexPattern(TreePatternNode *N,
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CodeGenDAGPatterns &CGP) {
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if (N->isLeaf() &&
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dynamic_cast<DefInit*>(N->getLeafValue()) &&
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static_cast<DefInit*>(N->getLeafValue())->getDef()->
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isSubClassOf("ComplexPattern")) {
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return &CGP.getComplexPattern(static_cast<DefInit*>(N->getLeafValue())
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->getDef());
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}
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return NULL;
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}
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/// getPatternSize - Return the 'size' of this pattern. We want to match large
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/// patterns before small ones. This is used to determine the size of a
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/// pattern.
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static unsigned getPatternSize(TreePatternNode *P, CodeGenDAGPatterns &CGP) {
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assert((EEVT::isExtIntegerInVTs(P->getExtTypes()) ||
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EEVT::isExtFloatingPointInVTs(P->getExtTypes()) ||
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P->getExtTypeNum(0) == MVT::isVoid ||
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P->getExtTypeNum(0) == MVT::Flag ||
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P->getExtTypeNum(0) == MVT::iPTR ||
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P->getExtTypeNum(0) == MVT::iPTRAny) &&
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"Not a valid pattern node to size!");
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unsigned Size = 3; // The node itself.
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// If the root node is a ConstantSDNode, increases its size.
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// e.g. (set R32:$dst, 0).
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if (P->isLeaf() && dynamic_cast<IntInit*>(P->getLeafValue()))
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Size += 2;
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// FIXME: This is a hack to statically increase the priority of patterns
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// which maps a sub-dag to a complex pattern. e.g. favors LEA over ADD.
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// Later we can allow complexity / cost for each pattern to be (optionally)
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// specified. To get best possible pattern match we'll need to dynamically
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// calculate the complexity of all patterns a dag can potentially map to.
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const ComplexPattern *AM = NodeGetComplexPattern(P, CGP);
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if (AM)
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Size += AM->getNumOperands() * 3;
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// If this node has some predicate function that must match, it adds to the
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// complexity of this node.
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if (!P->getPredicateFns().empty())
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++Size;
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// Count children in the count if they are also nodes.
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for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i) {
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TreePatternNode *Child = P->getChild(i);
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if (!Child->isLeaf() && Child->getExtTypeNum(0) != MVT::Other)
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Size += getPatternSize(Child, CGP);
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else if (Child->isLeaf()) {
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if (dynamic_cast<IntInit*>(Child->getLeafValue()))
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Size += 5; // Matches a ConstantSDNode (+3) and a specific value (+2).
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else if (NodeIsComplexPattern(Child))
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Size += getPatternSize(Child, CGP);
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else if (!Child->getPredicateFns().empty())
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++Size;
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}
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}
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return Size;
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}
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/// getResultPatternCost - Compute the number of instructions for this pattern.
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/// This is a temporary hack. We should really include the instruction
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/// latencies in this calculation.
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static unsigned getResultPatternCost(TreePatternNode *P,
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CodeGenDAGPatterns &CGP) {
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if (P->isLeaf()) return 0;
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unsigned Cost = 0;
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Record *Op = P->getOperator();
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if (Op->isSubClassOf("Instruction")) {
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Cost++;
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CodeGenInstruction &II = CGP.getTargetInfo().getInstruction(Op->getName());
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if (II.usesCustomInserter)
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Cost += 10;
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}
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for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i)
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Cost += getResultPatternCost(P->getChild(i), CGP);
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return Cost;
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}
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/// getResultPatternCodeSize - Compute the code size of instructions for this
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/// pattern.
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static unsigned getResultPatternSize(TreePatternNode *P,
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CodeGenDAGPatterns &CGP) {
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if (P->isLeaf()) return 0;
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unsigned Cost = 0;
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Record *Op = P->getOperator();
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if (Op->isSubClassOf("Instruction")) {
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Cost += Op->getValueAsInt("CodeSize");
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}
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for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i)
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Cost += getResultPatternSize(P->getChild(i), CGP);
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return Cost;
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}
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// PatternSortingPredicate - return true if we prefer to match LHS before RHS.
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// In particular, we want to match maximal patterns first and lowest cost within
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// a particular complexity first.
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struct PatternSortingPredicate {
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PatternSortingPredicate(CodeGenDAGPatterns &cgp) : CGP(cgp) {}
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CodeGenDAGPatterns &CGP;
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typedef std::pair<unsigned, std::string> CodeLine;
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typedef std::vector<CodeLine> CodeList;
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typedef std::vector<std::pair<const PatternToMatch*, CodeList> > PatternList;
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bool operator()(const std::pair<const PatternToMatch*, CodeList> &LHSPair,
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const std::pair<const PatternToMatch*, CodeList> &RHSPair) {
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const PatternToMatch *LHS = LHSPair.first;
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const PatternToMatch *RHS = RHSPair.first;
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unsigned LHSSize = getPatternSize(LHS->getSrcPattern(), CGP);
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unsigned RHSSize = getPatternSize(RHS->getSrcPattern(), CGP);
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LHSSize += LHS->getAddedComplexity();
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RHSSize += RHS->getAddedComplexity();
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if (LHSSize > RHSSize) return true; // LHS -> bigger -> less cost
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if (LHSSize < RHSSize) return false;
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// If the patterns have equal complexity, compare generated instruction cost
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unsigned LHSCost = getResultPatternCost(LHS->getDstPattern(), CGP);
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unsigned RHSCost = getResultPatternCost(RHS->getDstPattern(), CGP);
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if (LHSCost < RHSCost) return true;
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if (LHSCost > RHSCost) return false;
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return getResultPatternSize(LHS->getDstPattern(), CGP) <
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getResultPatternSize(RHS->getDstPattern(), CGP);
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}
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};
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/// getRegisterValueType - Look up and return the ValueType of the specified
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/// register. If the register is a member of multiple register classes which
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/// have different associated types, return MVT::Other.
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static MVT::SimpleValueType getRegisterValueType(Record *R, const CodeGenTarget &T) {
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bool FoundRC = false;
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MVT::SimpleValueType VT = MVT::Other;
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const std::vector<CodeGenRegisterClass> &RCs = T.getRegisterClasses();
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std::vector<CodeGenRegisterClass>::const_iterator RC;
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std::vector<Record*>::const_iterator Element;
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for (RC = RCs.begin() ; RC != RCs.end() ; RC++) {
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Element = find((*RC).Elements.begin(), (*RC).Elements.end(), R);
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if (Element != (*RC).Elements.end()) {
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if (!FoundRC) {
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FoundRC = true;
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VT = (*RC).getValueTypeNum(0);
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} else {
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// In multiple RC's
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if (VT != (*RC).getValueTypeNum(0)) {
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// Types of the RC's do not agree. Return MVT::Other. The
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// target is responsible for handling this.
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return MVT::Other;
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}
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}
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}
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}
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return VT;
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}
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/// RemoveAllTypes - A quick recursive walk over a pattern which removes all
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/// type information from it.
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static void RemoveAllTypes(TreePatternNode *N) {
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N->removeTypes();
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if (!N->isLeaf())
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for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i)
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RemoveAllTypes(N->getChild(i));
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}
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/// NodeHasProperty - return true if TreePatternNode has the specified
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/// property.
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static bool NodeHasProperty(TreePatternNode *N, SDNP Property,
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CodeGenDAGPatterns &CGP) {
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if (N->isLeaf()) {
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const ComplexPattern *CP = NodeGetComplexPattern(N, CGP);
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if (CP)
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return CP->hasProperty(Property);
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return false;
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}
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Record *Operator = N->getOperator();
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if (!Operator->isSubClassOf("SDNode")) return false;
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return CGP.getSDNodeInfo(Operator).hasProperty(Property);
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}
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static bool PatternHasProperty(TreePatternNode *N, SDNP Property,
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CodeGenDAGPatterns &CGP) {
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if (NodeHasProperty(N, Property, CGP))
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return true;
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for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
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TreePatternNode *Child = N->getChild(i);
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if (PatternHasProperty(Child, Property, CGP))
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return true;
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}
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return false;
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}
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static std::string getOpcodeName(Record *Op, CodeGenDAGPatterns &CGP) {
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return CGP.getSDNodeInfo(Op).getEnumName();
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}
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static
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bool DisablePatternForFastISel(TreePatternNode *N, CodeGenDAGPatterns &CGP) {
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bool isStore = !N->isLeaf() &&
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getOpcodeName(N->getOperator(), CGP) == "ISD::STORE";
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if (!isStore && NodeHasProperty(N, SDNPHasChain, CGP))
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return false;
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bool HasChain = false;
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for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i) {
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TreePatternNode *Child = N->getChild(i);
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if (PatternHasProperty(Child, SDNPHasChain, CGP)) {
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HasChain = true;
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break;
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}
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}
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return HasChain;
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}
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//===----------------------------------------------------------------------===//
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// Node Transformation emitter implementation.
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//
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void DAGISelEmitter::EmitNodeTransforms(raw_ostream &OS) {
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// Walk the pattern fragments, adding them to a map, which sorts them by
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// name.
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typedef std::map<std::string, CodeGenDAGPatterns::NodeXForm> NXsByNameTy;
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NXsByNameTy NXsByName;
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for (CodeGenDAGPatterns::nx_iterator I = CGP.nx_begin(), E = CGP.nx_end();
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I != E; ++I)
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NXsByName.insert(std::make_pair(I->first->getName(), I->second));
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OS << "\n// Node transformations.\n";
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for (NXsByNameTy::iterator I = NXsByName.begin(), E = NXsByName.end();
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I != E; ++I) {
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Record *SDNode = I->second.first;
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std::string Code = I->second.second;
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if (Code.empty()) continue; // Empty code? Skip it.
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std::string ClassName = CGP.getSDNodeInfo(SDNode).getSDClassName();
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const char *C2 = ClassName == "SDNode" ? "N" : "inN";
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OS << "inline SDValue Transform_" << I->first << "(SDNode *" << C2
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<< ") {\n";
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if (ClassName != "SDNode")
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OS << " " << ClassName << " *N = cast<" << ClassName << ">(inN);\n";
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OS << Code << "\n}\n";
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}
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}
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//===----------------------------------------------------------------------===//
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// Predicate emitter implementation.
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//
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void DAGISelEmitter::EmitPredicateFunctions(raw_ostream &OS) {
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OS << "\n// Predicate functions.\n";
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// Walk the pattern fragments, adding them to a map, which sorts them by
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// name.
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typedef std::map<std::string, std::pair<Record*, TreePattern*> > PFsByNameTy;
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PFsByNameTy PFsByName;
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for (CodeGenDAGPatterns::pf_iterator I = CGP.pf_begin(), E = CGP.pf_end();
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I != E; ++I)
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PFsByName.insert(std::make_pair(I->first->getName(), *I));
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for (PFsByNameTy::iterator I = PFsByName.begin(), E = PFsByName.end();
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I != E; ++I) {
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Record *PatFragRecord = I->second.first;// Record that derives from PatFrag.
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TreePattern *P = I->second.second;
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// If there is a code init for this fragment, emit the predicate code.
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std::string Code = PatFragRecord->getValueAsCode("Predicate");
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if (Code.empty()) continue;
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if (P->getOnlyTree()->isLeaf())
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OS << "inline bool Predicate_" << PatFragRecord->getName()
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<< "(SDNode *N) {\n";
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else {
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std::string ClassName =
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CGP.getSDNodeInfo(P->getOnlyTree()->getOperator()).getSDClassName();
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const char *C2 = ClassName == "SDNode" ? "N" : "inN";
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OS << "inline bool Predicate_" << PatFragRecord->getName()
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<< "(SDNode *" << C2 << ") {\n";
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if (ClassName != "SDNode")
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OS << " " << ClassName << " *N = cast<" << ClassName << ">(inN);\n";
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}
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OS << Code << "\n}\n";
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}
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OS << "\n\n";
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}
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//===----------------------------------------------------------------------===//
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// PatternCodeEmitter implementation.
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//
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class PatternCodeEmitter {
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private:
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CodeGenDAGPatterns &CGP;
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// Predicates.
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std::string PredicateCheck;
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// Pattern cost.
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unsigned Cost;
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// Instruction selector pattern.
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TreePatternNode *Pattern;
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// Matched instruction.
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TreePatternNode *Instruction;
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// Node to name mapping
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std::map<std::string, std::string> VariableMap;
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// Node to operator mapping
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std::map<std::string, Record*> OperatorMap;
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// Name of the folded node which produces a flag.
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std::pair<std::string, unsigned> FoldedFlag;
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// Names of all the folded nodes which produce chains.
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std::vector<std::pair<std::string, unsigned> > FoldedChains;
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// Original input chain(s).
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std::vector<std::pair<std::string, std::string> > OrigChains;
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std::set<std::string> Duplicates;
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/// LSI - Load/Store information.
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/// Save loads/stores matched by a pattern, and generate a MemOperandSDNode
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/// for each memory access. This facilitates the use of AliasAnalysis in
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/// the backend.
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std::vector<std::string> LSI;
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/// GeneratedCode - This is the buffer that we emit code to. The first int
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/// indicates whether this is an exit predicate (something that should be
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/// tested, and if true, the match fails) [when 1], or normal code to emit
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/// [when 0], or initialization code to emit [when 2].
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std::vector<std::pair<unsigned, std::string> > &GeneratedCode;
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/// GeneratedDecl - This is the set of all SDValue declarations needed for
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/// the set of patterns for each top-level opcode.
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std::set<std::string> &GeneratedDecl;
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/// TargetOpcodes - The target specific opcodes used by the resulting
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/// instructions.
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std::vector<std::string> &TargetOpcodes;
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std::vector<std::string> &TargetVTs;
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/// OutputIsVariadic - Records whether the instruction output pattern uses
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/// variable_ops. This requires that the Emit function be passed an
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/// additional argument to indicate where the input varargs operands
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/// begin.
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bool &OutputIsVariadic;
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/// NumInputRootOps - Records the number of operands the root node of the
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/// input pattern has. This information is used in the generated code to
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/// pass to Emit functions when variable_ops processing is needed.
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unsigned &NumInputRootOps;
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std::string ChainName;
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unsigned TmpNo;
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unsigned OpcNo;
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unsigned VTNo;
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void emitCheck(const std::string &S) {
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if (!S.empty())
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GeneratedCode.push_back(std::make_pair(1, S));
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}
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void emitCode(const std::string &S) {
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if (!S.empty())
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GeneratedCode.push_back(std::make_pair(0, S));
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}
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void emitInit(const std::string &S) {
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if (!S.empty())
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GeneratedCode.push_back(std::make_pair(2, S));
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}
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void emitDecl(const std::string &S) {
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assert(!S.empty() && "Invalid declaration");
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GeneratedDecl.insert(S);
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}
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void emitOpcode(const std::string &Opc) {
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TargetOpcodes.push_back(Opc);
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OpcNo++;
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}
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void emitVT(const std::string &VT) {
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TargetVTs.push_back(VT);
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VTNo++;
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}
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public:
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PatternCodeEmitter(CodeGenDAGPatterns &cgp, std::string predcheck,
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TreePatternNode *pattern, TreePatternNode *instr,
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std::vector<std::pair<unsigned, std::string> > &gc,
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std::set<std::string> &gd,
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std::vector<std::string> &to,
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std::vector<std::string> &tv,
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bool &oiv,
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unsigned &niro)
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: CGP(cgp), PredicateCheck(predcheck), Pattern(pattern), Instruction(instr),
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GeneratedCode(gc), GeneratedDecl(gd),
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TargetOpcodes(to), TargetVTs(tv),
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OutputIsVariadic(oiv), NumInputRootOps(niro),
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TmpNo(0), OpcNo(0), VTNo(0) {}
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/// EmitMatchCode - Emit a matcher for N, going to the label for PatternNo
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/// if the match fails. At this point, we already know that the opcode for N
|
|
/// matches, and the SDNode for the result has the RootName specified name.
|
|
void EmitMatchCode(TreePatternNode *N, TreePatternNode *P,
|
|
const std::string &RootName, const std::string &ChainSuffix,
|
|
bool &FoundChain) {
|
|
|
|
// Save loads/stores matched by a pattern.
|
|
if (!N->isLeaf() && N->getName().empty()) {
|
|
if (NodeHasProperty(N, SDNPMemOperand, CGP))
|
|
LSI.push_back(getNodeName(RootName));
|
|
}
|
|
|
|
bool isRoot = (P == NULL);
|
|
// Emit instruction predicates. Each predicate is just a string for now.
|
|
if (isRoot) {
|
|
// Record input varargs info.
|
|
NumInputRootOps = N->getNumChildren();
|
|
|
|
if (DisablePatternForFastISel(N, CGP))
|
|
emitCheck("OptLevel != CodeGenOpt::None");
|
|
|
|
emitCheck(PredicateCheck);
|
|
}
|
|
|
|
if (N->isLeaf()) {
|
|
if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
|
|
emitCheck("cast<ConstantSDNode>(" + getNodeName(RootName) +
|
|
")->getSExtValue() == INT64_C(" +
|
|
itostr(II->getValue()) + ")");
|
|
return;
|
|
} else if (!NodeIsComplexPattern(N)) {
|
|
assert(0 && "Cannot match this as a leaf value!");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
// If this node has a name associated with it, capture it in VariableMap. If
|
|
// we already saw this in the pattern, emit code to verify dagness.
|
|
if (!N->getName().empty()) {
|
|
std::string &VarMapEntry = VariableMap[N->getName()];
|
|
if (VarMapEntry.empty()) {
|
|
VarMapEntry = RootName;
|
|
} else {
|
|
// If we get here, this is a second reference to a specific name. Since
|
|
// we already have checked that the first reference is valid, we don't
|
|
// have to recursively match it, just check that it's the same as the
|
|
// previously named thing.
|
|
emitCheck(VarMapEntry + " == " + RootName);
|
|
return;
|
|
}
|
|
|
|
if (!N->isLeaf())
|
|
OperatorMap[N->getName()] = N->getOperator();
|
|
}
|
|
|
|
|
|
// Emit code to load the child nodes and match their contents recursively.
|
|
unsigned OpNo = 0;
|
|
bool NodeHasChain = NodeHasProperty (N, SDNPHasChain, CGP);
|
|
bool HasChain = PatternHasProperty(N, SDNPHasChain, CGP);
|
|
bool EmittedUseCheck = false;
|
|
if (HasChain) {
|
|
if (NodeHasChain)
|
|
OpNo = 1;
|
|
if (!isRoot) {
|
|
// Multiple uses of actual result?
|
|
emitCheck(getValueName(RootName) + ".hasOneUse()");
|
|
EmittedUseCheck = true;
|
|
if (NodeHasChain) {
|
|
// If the immediate use can somehow reach this node through another
|
|
// path, then can't fold it either or it will create a cycle.
|
|
// e.g. In the following diagram, XX can reach ld through YY. If
|
|
// ld is folded into XX, then YY is both a predecessor and a successor
|
|
// of XX.
|
|
//
|
|
// [ld]
|
|
// ^ ^
|
|
// | |
|
|
// / \---
|
|
// / [YY]
|
|
// | ^
|
|
// [XX]-------|
|
|
bool NeedCheck = P != Pattern;
|
|
if (!NeedCheck) {
|
|
const SDNodeInfo &PInfo = CGP.getSDNodeInfo(P->getOperator());
|
|
NeedCheck =
|
|
P->getOperator() == CGP.get_intrinsic_void_sdnode() ||
|
|
P->getOperator() == CGP.get_intrinsic_w_chain_sdnode() ||
|
|
P->getOperator() == CGP.get_intrinsic_wo_chain_sdnode() ||
|
|
PInfo.getNumOperands() > 1 ||
|
|
PInfo.hasProperty(SDNPHasChain) ||
|
|
PInfo.hasProperty(SDNPInFlag) ||
|
|
PInfo.hasProperty(SDNPOptInFlag);
|
|
}
|
|
|
|
if (NeedCheck) {
|
|
std::string ParentName(RootName.begin(), RootName.end()-1);
|
|
emitCheck("IsLegalAndProfitableToFold(" + getNodeName(RootName) +
|
|
", " + getNodeName(ParentName) + ", N)");
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NodeHasChain) {
|
|
if (FoundChain) {
|
|
emitCheck("(" + ChainName + ".getNode() == " +
|
|
getNodeName(RootName) + " || "
|
|
"IsChainCompatible(" + ChainName + ".getNode(), " +
|
|
getNodeName(RootName) + "))");
|
|
OrigChains.push_back(std::make_pair(ChainName,
|
|
getValueName(RootName)));
|
|
} else
|
|
FoundChain = true;
|
|
ChainName = "Chain" + ChainSuffix;
|
|
emitInit("SDValue " + ChainName + " = " + getNodeName(RootName) +
|
|
"->getOperand(0);");
|
|
}
|
|
}
|
|
|
|
// Don't fold any node which reads or writes a flag and has multiple uses.
|
|
// FIXME: We really need to separate the concepts of flag and "glue". Those
|
|
// real flag results, e.g. X86CMP output, can have multiple uses.
|
|
// FIXME: If the optional incoming flag does not exist. Then it is ok to
|
|
// fold it.
|
|
if (!isRoot &&
|
|
(PatternHasProperty(N, SDNPInFlag, CGP) ||
|
|
PatternHasProperty(N, SDNPOptInFlag, CGP) ||
|
|
PatternHasProperty(N, SDNPOutFlag, CGP))) {
|
|
if (!EmittedUseCheck) {
|
|
// Multiple uses of actual result?
|
|
emitCheck(getValueName(RootName) + ".hasOneUse()");
|
|
}
|
|
}
|
|
|
|
// If there are node predicates for this, emit the calls.
|
|
for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
|
|
emitCheck(N->getPredicateFns()[i] + "(" + getNodeName(RootName) + ")");
|
|
|
|
// If this is an 'and R, 1234' where the operation is AND/OR and the RHS is
|
|
// a constant without a predicate fn that has more that one bit set, handle
|
|
// this as a special case. This is usually for targets that have special
|
|
// handling of certain large constants (e.g. alpha with it's 8/16/32-bit
|
|
// handling stuff). Using these instructions is often far more efficient
|
|
// than materializing the constant. Unfortunately, both the instcombiner
|
|
// and the dag combiner can often infer that bits are dead, and thus drop
|
|
// them from the mask in the dag. For example, it might turn 'AND X, 255'
|
|
// into 'AND X, 254' if it knows the low bit is set. Emit code that checks
|
|
// to handle this.
|
|
if (!N->isLeaf() &&
|
|
(N->getOperator()->getName() == "and" ||
|
|
N->getOperator()->getName() == "or") &&
|
|
N->getChild(1)->isLeaf() &&
|
|
N->getChild(1)->getPredicateFns().empty()) {
|
|
if (IntInit *II = dynamic_cast<IntInit*>(N->getChild(1)->getLeafValue())) {
|
|
if (!isPowerOf2_32(II->getValue())) { // Don't bother with single bits.
|
|
emitInit("SDValue " + RootName + "0" + " = " +
|
|
getNodeName(RootName) + "->getOperand(" + utostr(0) + ");");
|
|
emitInit("SDValue " + RootName + "1" + " = " +
|
|
getNodeName(RootName) + "->getOperand(" + utostr(1) + ");");
|
|
|
|
unsigned NTmp = TmpNo++;
|
|
emitCode("ConstantSDNode *Tmp" + utostr(NTmp) +
|
|
" = dyn_cast<ConstantSDNode>(" +
|
|
getNodeName(RootName + "1") + ");");
|
|
emitCheck("Tmp" + utostr(NTmp));
|
|
const char *MaskPredicate = N->getOperator()->getName() == "or"
|
|
? "CheckOrMask(" : "CheckAndMask(";
|
|
emitCheck(MaskPredicate + getValueName(RootName + "0") +
|
|
", Tmp" + utostr(NTmp) +
|
|
", INT64_C(" + itostr(II->getValue()) + "))");
|
|
|
|
EmitChildMatchCode(N->getChild(0), N, RootName + utostr(0),
|
|
ChainSuffix + utostr(0), FoundChain);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
|
|
emitInit("SDValue " + getValueName(RootName + utostr(OpNo)) + " = " +
|
|
getNodeName(RootName) + "->getOperand(" + utostr(OpNo) + ");");
|
|
|
|
EmitChildMatchCode(N->getChild(i), N, RootName + utostr(OpNo),
|
|
ChainSuffix + utostr(OpNo), FoundChain);
|
|
}
|
|
|
|
// Handle cases when root is a complex pattern.
|
|
const ComplexPattern *CP;
|
|
if (isRoot && N->isLeaf() && (CP = NodeGetComplexPattern(N, CGP))) {
|
|
std::string Fn = CP->getSelectFunc();
|
|
unsigned NumOps = CP->getNumOperands();
|
|
for (unsigned i = 0; i < NumOps; ++i) {
|
|
emitDecl("CPTmp" + RootName + "_" + utostr(i));
|
|
emitCode("SDValue CPTmp" + RootName + "_" + utostr(i) + ";");
|
|
}
|
|
if (CP->hasProperty(SDNPHasChain)) {
|
|
emitDecl("CPInChain");
|
|
emitDecl("Chain" + ChainSuffix);
|
|
emitCode("SDValue CPInChain;");
|
|
emitCode("SDValue Chain" + ChainSuffix + ";");
|
|
}
|
|
|
|
std::string Code = Fn + "(" +
|
|
getNodeName(RootName) + ", " +
|
|
getValueName(RootName);
|
|
for (unsigned i = 0; i < NumOps; i++)
|
|
Code += ", CPTmp" + RootName + "_" + utostr(i);
|
|
if (CP->hasProperty(SDNPHasChain)) {
|
|
ChainName = "Chain" + ChainSuffix;
|
|
Code += ", CPInChain, Chain" + ChainSuffix;
|
|
}
|
|
emitCheck(Code + ")");
|
|
}
|
|
}
|
|
|
|
void EmitChildMatchCode(TreePatternNode *Child, TreePatternNode *Parent,
|
|
const std::string &RootName,
|
|
const std::string &ChainSuffix, bool &FoundChain) {
|
|
if (!Child->isLeaf()) {
|
|
// If it's not a leaf, recursively match.
|
|
const SDNodeInfo &CInfo = CGP.getSDNodeInfo(Child->getOperator());
|
|
emitCheck(getNodeName(RootName) + "->getOpcode() == " +
|
|
CInfo.getEnumName());
|
|
EmitMatchCode(Child, Parent, RootName, ChainSuffix, FoundChain);
|
|
bool HasChain = false;
|
|
if (NodeHasProperty(Child, SDNPHasChain, CGP)) {
|
|
HasChain = true;
|
|
FoldedChains.push_back(std::make_pair(getValueName(RootName),
|
|
CInfo.getNumResults()));
|
|
}
|
|
if (NodeHasProperty(Child, SDNPOutFlag, CGP)) {
|
|
assert(FoldedFlag.first == "" && FoldedFlag.second == 0 &&
|
|
"Pattern folded multiple nodes which produce flags?");
|
|
FoldedFlag = std::make_pair(getValueName(RootName),
|
|
CInfo.getNumResults() + (unsigned)HasChain);
|
|
}
|
|
} else {
|
|
// If this child has a name associated with it, capture it in VarMap. If
|
|
// we already saw this in the pattern, emit code to verify dagness.
|
|
if (!Child->getName().empty()) {
|
|
std::string &VarMapEntry = VariableMap[Child->getName()];
|
|
if (VarMapEntry.empty()) {
|
|
VarMapEntry = getValueName(RootName);
|
|
} else {
|
|
// If we get here, this is a second reference to a specific name.
|
|
// Since we already have checked that the first reference is valid,
|
|
// we don't have to recursively match it, just check that it's the
|
|
// same as the previously named thing.
|
|
emitCheck(VarMapEntry + " == " + getValueName(RootName));
|
|
Duplicates.insert(getValueName(RootName));
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Handle leaves of various types.
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
|
|
Record *LeafRec = DI->getDef();
|
|
if (LeafRec->isSubClassOf("RegisterClass") ||
|
|
LeafRec->isSubClassOf("PointerLikeRegClass")) {
|
|
// Handle register references. Nothing to do here.
|
|
} else if (LeafRec->isSubClassOf("Register")) {
|
|
// Handle register references.
|
|
} else if (LeafRec->isSubClassOf("ComplexPattern")) {
|
|
// Handle complex pattern.
|
|
const ComplexPattern *CP = NodeGetComplexPattern(Child, CGP);
|
|
std::string Fn = CP->getSelectFunc();
|
|
unsigned NumOps = CP->getNumOperands();
|
|
for (unsigned i = 0; i < NumOps; ++i) {
|
|
emitDecl("CPTmp" + RootName + "_" + utostr(i));
|
|
emitCode("SDValue CPTmp" + RootName + "_" + utostr(i) + ";");
|
|
}
|
|
if (CP->hasProperty(SDNPHasChain)) {
|
|
const SDNodeInfo &PInfo = CGP.getSDNodeInfo(Parent->getOperator());
|
|
FoldedChains.push_back(std::make_pair("CPInChain",
|
|
PInfo.getNumResults()));
|
|
ChainName = "Chain" + ChainSuffix;
|
|
emitDecl("CPInChain");
|
|
emitDecl(ChainName);
|
|
emitCode("SDValue CPInChain;");
|
|
emitCode("SDValue " + ChainName + ";");
|
|
}
|
|
|
|
std::string Code = Fn + "(N, ";
|
|
if (CP->hasProperty(SDNPHasChain)) {
|
|
std::string ParentName(RootName.begin(), RootName.end()-1);
|
|
Code += getValueName(ParentName) + ", ";
|
|
}
|
|
Code += getValueName(RootName);
|
|
for (unsigned i = 0; i < NumOps; i++)
|
|
Code += ", CPTmp" + RootName + "_" + utostr(i);
|
|
if (CP->hasProperty(SDNPHasChain))
|
|
Code += ", CPInChain, Chain" + ChainSuffix;
|
|
emitCheck(Code + ")");
|
|
} else if (LeafRec->getName() == "srcvalue") {
|
|
// Place holder for SRCVALUE nodes. Nothing to do here.
|
|
} else if (LeafRec->isSubClassOf("ValueType")) {
|
|
// Make sure this is the specified value type.
|
|
emitCheck("cast<VTSDNode>(" + getNodeName(RootName) +
|
|
")->getVT() == MVT::" + LeafRec->getName());
|
|
} else if (LeafRec->isSubClassOf("CondCode")) {
|
|
// Make sure this is the specified cond code.
|
|
emitCheck("cast<CondCodeSDNode>(" + getNodeName(RootName) +
|
|
")->get() == ISD::" + LeafRec->getName());
|
|
} else {
|
|
#ifndef NDEBUG
|
|
Child->dump();
|
|
errs() << " ";
|
|
#endif
|
|
assert(0 && "Unknown leaf type!");
|
|
}
|
|
|
|
// If there are node predicates for this, emit the calls.
|
|
for (unsigned i = 0, e = Child->getPredicateFns().size(); i != e; ++i)
|
|
emitCheck(Child->getPredicateFns()[i] + "(" + getNodeName(RootName) +
|
|
")");
|
|
} else if (IntInit *II =
|
|
dynamic_cast<IntInit*>(Child->getLeafValue())) {
|
|
unsigned NTmp = TmpNo++;
|
|
emitCode("ConstantSDNode *Tmp"+ utostr(NTmp) +
|
|
" = dyn_cast<ConstantSDNode>("+
|
|
getNodeName(RootName) + ");");
|
|
emitCheck("Tmp" + utostr(NTmp));
|
|
unsigned CTmp = TmpNo++;
|
|
emitCode("int64_t CN"+ utostr(CTmp) +
|
|
" = Tmp" + utostr(NTmp) + "->getSExtValue();");
|
|
emitCheck("CN" + utostr(CTmp) + " == "
|
|
"INT64_C(" +itostr(II->getValue()) + ")");
|
|
} else {
|
|
#ifndef NDEBUG
|
|
Child->dump();
|
|
#endif
|
|
assert(0 && "Unknown leaf type!");
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitResultCode - Emit the action for a pattern. Now that it has matched
|
|
/// we actually have to build a DAG!
|
|
std::vector<std::string>
|
|
EmitResultCode(TreePatternNode *N, std::vector<Record*> DstRegs,
|
|
bool InFlagDecled, bool ResNodeDecled,
|
|
bool LikeLeaf = false, bool isRoot = false) {
|
|
// List of arguments of getMachineNode() or SelectNodeTo().
|
|
std::vector<std::string> NodeOps;
|
|
// This is something selected from the pattern we matched.
|
|
if (!N->getName().empty()) {
|
|
const std::string &VarName = N->getName();
|
|
std::string Val = VariableMap[VarName];
|
|
bool ModifiedVal = false;
|
|
if (Val.empty()) {
|
|
errs() << "Variable '" << VarName << " referenced but not defined "
|
|
<< "and not caught earlier!\n";
|
|
abort();
|
|
}
|
|
if (Val[0] == 'T' && Val[1] == 'm' && Val[2] == 'p') {
|
|
// Already selected this operand, just return the tmpval.
|
|
NodeOps.push_back(getValueName(Val));
|
|
return NodeOps;
|
|
}
|
|
|
|
const ComplexPattern *CP;
|
|
unsigned ResNo = TmpNo++;
|
|
if (!N->isLeaf() && N->getOperator()->getName() == "imm") {
|
|
assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
|
|
std::string CastType;
|
|
std::string TmpVar = "Tmp" + utostr(ResNo);
|
|
switch (N->getTypeNum(0)) {
|
|
default:
|
|
errs() << "Cannot handle " << getEnumName(N->getTypeNum(0))
|
|
<< " type as an immediate constant. Aborting\n";
|
|
abort();
|
|
case MVT::i1: CastType = "bool"; break;
|
|
case MVT::i8: CastType = "unsigned char"; break;
|
|
case MVT::i16: CastType = "unsigned short"; break;
|
|
case MVT::i32: CastType = "unsigned"; break;
|
|
case MVT::i64: CastType = "uint64_t"; break;
|
|
}
|
|
emitCode("SDValue " + TmpVar +
|
|
" = CurDAG->getTargetConstant(((" + CastType +
|
|
") cast<ConstantSDNode>(" + Val + ")->getZExtValue()), " +
|
|
getEnumName(N->getTypeNum(0)) + ");");
|
|
// Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
|
|
// value if used multiple times by this pattern result.
|
|
Val = TmpVar;
|
|
ModifiedVal = true;
|
|
NodeOps.push_back(getValueName(Val));
|
|
} else if (!N->isLeaf() && N->getOperator()->getName() == "fpimm") {
|
|
assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
|
|
std::string TmpVar = "Tmp" + utostr(ResNo);
|
|
emitCode("SDValue " + TmpVar +
|
|
" = CurDAG->getTargetConstantFP(*cast<ConstantFPSDNode>(" +
|
|
Val + ")->getConstantFPValue(), cast<ConstantFPSDNode>(" +
|
|
Val + ")->getValueType(0));");
|
|
// Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
|
|
// value if used multiple times by this pattern result.
|
|
Val = TmpVar;
|
|
ModifiedVal = true;
|
|
NodeOps.push_back(getValueName(Val));
|
|
} else if (!N->isLeaf() && N->getOperator()->getName() == "texternalsym"){
|
|
Record *Op = OperatorMap[N->getName()];
|
|
// Transform ExternalSymbol to TargetExternalSymbol
|
|
if (Op && Op->getName() == "externalsym") {
|
|
std::string TmpVar = "Tmp"+utostr(ResNo);
|
|
emitCode("SDValue " + TmpVar + " = CurDAG->getTarget"
|
|
"ExternalSymbol(cast<ExternalSymbolSDNode>(" +
|
|
Val + ")->getSymbol(), " +
|
|
getEnumName(N->getTypeNum(0)) + ");");
|
|
// Add Tmp<ResNo> to VariableMap, so that we don't multiply select
|
|
// this value if used multiple times by this pattern result.
|
|
Val = TmpVar;
|
|
ModifiedVal = true;
|
|
}
|
|
NodeOps.push_back(getValueName(Val));
|
|
} else if (!N->isLeaf() && (N->getOperator()->getName() == "tglobaladdr"
|
|
|| N->getOperator()->getName() == "tglobaltlsaddr")) {
|
|
Record *Op = OperatorMap[N->getName()];
|
|
// Transform GlobalAddress to TargetGlobalAddress
|
|
if (Op && (Op->getName() == "globaladdr" ||
|
|
Op->getName() == "globaltlsaddr")) {
|
|
std::string TmpVar = "Tmp" + utostr(ResNo);
|
|
emitCode("SDValue " + TmpVar + " = CurDAG->getTarget"
|
|
"GlobalAddress(cast<GlobalAddressSDNode>(" + Val +
|
|
")->getGlobal(), " + getEnumName(N->getTypeNum(0)) +
|
|
");");
|
|
// Add Tmp<ResNo> to VariableMap, so that we don't multiply select
|
|
// this value if used multiple times by this pattern result.
|
|
Val = TmpVar;
|
|
ModifiedVal = true;
|
|
}
|
|
NodeOps.push_back(getValueName(Val));
|
|
} else if (!N->isLeaf()
|
|
&& (N->getOperator()->getName() == "texternalsym"
|
|
|| N->getOperator()->getName() == "tconstpool")) {
|
|
// Do not rewrite the variable name, since we don't generate a new
|
|
// temporary.
|
|
NodeOps.push_back(getValueName(Val));
|
|
} else if (N->isLeaf() && (CP = NodeGetComplexPattern(N, CGP))) {
|
|
for (unsigned i = 0; i < CP->getNumOperands(); ++i) {
|
|
NodeOps.push_back(getValueName("CPTmp" + Val + "_" + utostr(i)));
|
|
}
|
|
} else {
|
|
// This node, probably wrapped in a SDNodeXForm, behaves like a leaf
|
|
// node even if it isn't one. Don't select it.
|
|
if (!LikeLeaf) {
|
|
if (isRoot && N->isLeaf()) {
|
|
emitCode("ReplaceUses(SDValue(N, 0), " + Val + ");");
|
|
emitCode("return NULL;");
|
|
}
|
|
}
|
|
NodeOps.push_back(getValueName(Val));
|
|
}
|
|
|
|
if (ModifiedVal) {
|
|
VariableMap[VarName] = Val;
|
|
}
|
|
return NodeOps;
|
|
}
|
|
if (N->isLeaf()) {
|
|
// If this is an explicit register reference, handle it.
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
|
|
unsigned ResNo = TmpNo++;
|
|
if (DI->getDef()->isSubClassOf("Register")) {
|
|
emitCode("SDValue Tmp" + utostr(ResNo) + " = CurDAG->getRegister(" +
|
|
getQualifiedName(DI->getDef()) + ", " +
|
|
getEnumName(N->getTypeNum(0)) + ");");
|
|
NodeOps.push_back(getValueName("Tmp" + utostr(ResNo)));
|
|
return NodeOps;
|
|
} else if (DI->getDef()->getName() == "zero_reg") {
|
|
emitCode("SDValue Tmp" + utostr(ResNo) +
|
|
" = CurDAG->getRegister(0, " +
|
|
getEnumName(N->getTypeNum(0)) + ");");
|
|
NodeOps.push_back(getValueName("Tmp" + utostr(ResNo)));
|
|
return NodeOps;
|
|
} else if (DI->getDef()->isSubClassOf("RegisterClass")) {
|
|
// Handle a reference to a register class. This is used
|
|
// in COPY_TO_SUBREG instructions.
|
|
emitCode("SDValue Tmp" + utostr(ResNo) +
|
|
" = CurDAG->getTargetConstant(" +
|
|
getQualifiedName(DI->getDef()) + "RegClassID, " +
|
|
"MVT::i32);");
|
|
NodeOps.push_back(getValueName("Tmp" + utostr(ResNo)));
|
|
return NodeOps;
|
|
}
|
|
} else if (IntInit *II = dynamic_cast<IntInit*>(N->getLeafValue())) {
|
|
unsigned ResNo = TmpNo++;
|
|
assert(N->getExtTypes().size() == 1 && "Multiple types not handled!");
|
|
emitCode("SDValue Tmp" + utostr(ResNo) +
|
|
" = CurDAG->getTargetConstant(0x" +
|
|
utohexstr((uint64_t) II->getValue()) +
|
|
"ULL, " + getEnumName(N->getTypeNum(0)) + ");");
|
|
NodeOps.push_back(getValueName("Tmp" + utostr(ResNo)));
|
|
return NodeOps;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
N->dump();
|
|
#endif
|
|
assert(0 && "Unknown leaf type!");
|
|
return NodeOps;
|
|
}
|
|
|
|
Record *Op = N->getOperator();
|
|
if (Op->isSubClassOf("Instruction")) {
|
|
const CodeGenTarget &CGT = CGP.getTargetInfo();
|
|
CodeGenInstruction &II = CGT.getInstruction(Op->getName());
|
|
const DAGInstruction &Inst = CGP.getInstruction(Op);
|
|
const TreePattern *InstPat = Inst.getPattern();
|
|
// FIXME: Assume actual pattern comes before "implicit".
|
|
TreePatternNode *InstPatNode =
|
|
isRoot ? (InstPat ? InstPat->getTree(0) : Pattern)
|
|
: (InstPat ? InstPat->getTree(0) : NULL);
|
|
if (InstPatNode && !InstPatNode->isLeaf() &&
|
|
InstPatNode->getOperator()->getName() == "set") {
|
|
InstPatNode = InstPatNode->getChild(InstPatNode->getNumChildren()-1);
|
|
}
|
|
bool IsVariadic = isRoot && II.isVariadic;
|
|
// FIXME: fix how we deal with physical register operands.
|
|
bool HasImpInputs = isRoot && Inst.getNumImpOperands() > 0;
|
|
bool HasImpResults = isRoot && DstRegs.size() > 0;
|
|
bool NodeHasOptInFlag = isRoot &&
|
|
PatternHasProperty(Pattern, SDNPOptInFlag, CGP);
|
|
bool NodeHasInFlag = isRoot &&
|
|
PatternHasProperty(Pattern, SDNPInFlag, CGP);
|
|
bool NodeHasOutFlag = isRoot &&
|
|
PatternHasProperty(Pattern, SDNPOutFlag, CGP);
|
|
bool NodeHasChain = InstPatNode &&
|
|
PatternHasProperty(InstPatNode, SDNPHasChain, CGP);
|
|
bool InputHasChain = isRoot &&
|
|
NodeHasProperty(Pattern, SDNPHasChain, CGP);
|
|
unsigned NumResults = Inst.getNumResults();
|
|
unsigned NumDstRegs = HasImpResults ? DstRegs.size() : 0;
|
|
|
|
// Record output varargs info.
|
|
OutputIsVariadic = IsVariadic;
|
|
|
|
if (NodeHasOptInFlag) {
|
|
emitCode("bool HasInFlag = "
|
|
"(N->getOperand(N->getNumOperands()-1).getValueType() == "
|
|
"MVT::Flag);");
|
|
}
|
|
if (IsVariadic)
|
|
emitCode("SmallVector<SDValue, 8> Ops" + utostr(OpcNo) + ";");
|
|
|
|
// How many results is this pattern expected to produce?
|
|
unsigned NumPatResults = 0;
|
|
for (unsigned i = 0, e = Pattern->getExtTypes().size(); i != e; i++) {
|
|
MVT::SimpleValueType VT = Pattern->getTypeNum(i);
|
|
if (VT != MVT::isVoid && VT != MVT::Flag)
|
|
NumPatResults++;
|
|
}
|
|
|
|
if (OrigChains.size() > 0) {
|
|
// The original input chain is being ignored. If it is not just
|
|
// pointing to the op that's being folded, we should create a
|
|
// TokenFactor with it and the chain of the folded op as the new chain.
|
|
// We could potentially be doing multiple levels of folding, in that
|
|
// case, the TokenFactor can have more operands.
|
|
emitCode("SmallVector<SDValue, 8> InChains;");
|
|
for (unsigned i = 0, e = OrigChains.size(); i < e; ++i) {
|
|
emitCode("if (" + OrigChains[i].first + ".getNode() != " +
|
|
OrigChains[i].second + ".getNode()) {");
|
|
emitCode(" InChains.push_back(" + OrigChains[i].first + ");");
|
|
emitCode("}");
|
|
}
|
|
emitCode("InChains.push_back(" + ChainName + ");");
|
|
emitCode(ChainName + " = CurDAG->getNode(ISD::TokenFactor, "
|
|
"N->getDebugLoc(), MVT::Other, "
|
|
"&InChains[0], InChains.size());");
|
|
if (GenDebug) {
|
|
emitCode("CurDAG->setSubgraphColor(" + ChainName +".getNode(), \"yellow\");");
|
|
emitCode("CurDAG->setSubgraphColor(" + ChainName +".getNode(), \"black\");");
|
|
}
|
|
}
|
|
|
|
// Loop over all of the operands of the instruction pattern, emitting code
|
|
// to fill them all in. The node 'N' usually has number children equal to
|
|
// the number of input operands of the instruction. However, in cases
|
|
// where there are predicate operands for an instruction, we need to fill
|
|
// in the 'execute always' values. Match up the node operands to the
|
|
// instruction operands to do this.
|
|
std::vector<std::string> AllOps;
|
|
for (unsigned ChildNo = 0, InstOpNo = NumResults;
|
|
InstOpNo != II.OperandList.size(); ++InstOpNo) {
|
|
std::vector<std::string> Ops;
|
|
|
|
// Determine what to emit for this operand.
|
|
Record *OperandNode = II.OperandList[InstOpNo].Rec;
|
|
if ((OperandNode->isSubClassOf("PredicateOperand") ||
|
|
OperandNode->isSubClassOf("OptionalDefOperand")) &&
|
|
!CGP.getDefaultOperand(OperandNode).DefaultOps.empty()) {
|
|
// This is a predicate or optional def operand; emit the
|
|
// 'default ops' operands.
|
|
const DAGDefaultOperand &DefaultOp =
|
|
CGP.getDefaultOperand(II.OperandList[InstOpNo].Rec);
|
|
for (unsigned i = 0, e = DefaultOp.DefaultOps.size(); i != e; ++i) {
|
|
Ops = EmitResultCode(DefaultOp.DefaultOps[i], DstRegs,
|
|
InFlagDecled, ResNodeDecled);
|
|
AllOps.insert(AllOps.end(), Ops.begin(), Ops.end());
|
|
}
|
|
} else {
|
|
// Otherwise this is a normal operand or a predicate operand without
|
|
// 'execute always'; emit it.
|
|
Ops = EmitResultCode(N->getChild(ChildNo), DstRegs,
|
|
InFlagDecled, ResNodeDecled);
|
|
AllOps.insert(AllOps.end(), Ops.begin(), Ops.end());
|
|
++ChildNo;
|
|
}
|
|
}
|
|
|
|
// Emit all the chain and CopyToReg stuff.
|
|
bool ChainEmitted = NodeHasChain;
|
|
if (NodeHasInFlag || HasImpInputs)
|
|
EmitInFlagSelectCode(Pattern, "N", ChainEmitted,
|
|
InFlagDecled, ResNodeDecled, true);
|
|
if (NodeHasOptInFlag || NodeHasInFlag || HasImpInputs) {
|
|
if (!InFlagDecled) {
|
|
emitCode("SDValue InFlag(0, 0);");
|
|
InFlagDecled = true;
|
|
}
|
|
if (NodeHasOptInFlag) {
|
|
emitCode("if (HasInFlag) {");
|
|
emitCode(" InFlag = N->getOperand(N->getNumOperands()-1);");
|
|
emitCode("}");
|
|
}
|
|
}
|
|
|
|
unsigned ResNo = TmpNo++;
|
|
|
|
unsigned OpsNo = OpcNo;
|
|
std::string CodePrefix;
|
|
bool ChainAssignmentNeeded = NodeHasChain && !isRoot;
|
|
std::deque<std::string> After;
|
|
std::string NodeName;
|
|
if (!isRoot) {
|
|
NodeName = "Tmp" + utostr(ResNo);
|
|
CodePrefix = "SDValue " + NodeName + "(";
|
|
} else {
|
|
NodeName = "ResNode";
|
|
if (!ResNodeDecled) {
|
|
CodePrefix = "SDNode *" + NodeName + " = ";
|
|
ResNodeDecled = true;
|
|
} else
|
|
CodePrefix = NodeName + " = ";
|
|
}
|
|
|
|
std::string Code = "Opc" + utostr(OpcNo);
|
|
|
|
if (!isRoot || (InputHasChain && !NodeHasChain))
|
|
// For call to "getMachineNode()".
|
|
Code += ", N->getDebugLoc()";
|
|
|
|
emitOpcode(II.Namespace + "::" + II.TheDef->getName());
|
|
|
|
// Output order: results, chain, flags
|
|
// Result types.
|
|
if (NumResults > 0 && N->getTypeNum(0) != MVT::isVoid) {
|
|
Code += ", VT" + utostr(VTNo);
|
|
emitVT(getEnumName(N->getTypeNum(0)));
|
|
}
|
|
// Add types for implicit results in physical registers, scheduler will
|
|
// care of adding copyfromreg nodes.
|
|
for (unsigned i = 0; i < NumDstRegs; i++) {
|
|
Record *RR = DstRegs[i];
|
|
if (RR->isSubClassOf("Register")) {
|
|
MVT::SimpleValueType RVT = getRegisterValueType(RR, CGT);
|
|
Code += ", " + getEnumName(RVT);
|
|
}
|
|
}
|
|
if (NodeHasChain)
|
|
Code += ", MVT::Other";
|
|
if (NodeHasOutFlag)
|
|
Code += ", MVT::Flag";
|
|
|
|
// Inputs.
|
|
if (IsVariadic) {
|
|
for (unsigned i = 0, e = AllOps.size(); i != e; ++i)
|
|
emitCode("Ops" + utostr(OpsNo) + ".push_back(" + AllOps[i] + ");");
|
|
AllOps.clear();
|
|
|
|
// Figure out whether any operands at the end of the op list are not
|
|
// part of the variable section.
|
|
std::string EndAdjust;
|
|
if (NodeHasInFlag || HasImpInputs)
|
|
EndAdjust = "-1"; // Always has one flag.
|
|
else if (NodeHasOptInFlag)
|
|
EndAdjust = "-(HasInFlag?1:0)"; // May have a flag.
|
|
|
|
emitCode("for (unsigned i = NumInputRootOps + " + utostr(NodeHasChain) +
|
|
", e = N->getNumOperands()" + EndAdjust + "; i != e; ++i) {");
|
|
|
|
emitCode(" Ops" + utostr(OpsNo) + ".push_back(N->getOperand(i));");
|
|
emitCode("}");
|
|
}
|
|
|
|
// Populate MemRefs with entries for each memory accesses covered by
|
|
// this pattern.
|
|
if (isRoot && !LSI.empty()) {
|
|
std::string MemRefs = "MemRefs" + utostr(OpsNo);
|
|
emitCode("MachineSDNode::mmo_iterator " + MemRefs + " = "
|
|
"MF->allocateMemRefsArray(" + utostr(LSI.size()) + ");");
|
|
for (unsigned i = 0, e = LSI.size(); i != e; ++i)
|
|
emitCode(MemRefs + "[" + utostr(i) + "] = "
|
|
"cast<MemSDNode>(" + LSI[i] + ")->getMemOperand();");
|
|
After.push_back("cast<MachineSDNode>(ResNode)->setMemRefs(" +
|
|
MemRefs + ", " + MemRefs + " + " + utostr(LSI.size()) +
|
|
");");
|
|
}
|
|
|
|
if (NodeHasChain) {
|
|
if (IsVariadic)
|
|
emitCode("Ops" + utostr(OpsNo) + ".push_back(" + ChainName + ");");
|
|
else
|
|
AllOps.push_back(ChainName);
|
|
}
|
|
|
|
if (IsVariadic) {
|
|
if (NodeHasInFlag || HasImpInputs)
|
|
emitCode("Ops" + utostr(OpsNo) + ".push_back(InFlag);");
|
|
else if (NodeHasOptInFlag) {
|
|
emitCode("if (HasInFlag)");
|
|
emitCode(" Ops" + utostr(OpsNo) + ".push_back(InFlag);");
|
|
}
|
|
Code += ", &Ops" + utostr(OpsNo) + "[0], Ops" + utostr(OpsNo) +
|
|
".size()";
|
|
} else if (NodeHasInFlag || NodeHasOptInFlag || HasImpInputs)
|
|
AllOps.push_back("InFlag");
|
|
|
|
unsigned NumOps = AllOps.size();
|
|
if (NumOps) {
|
|
if (!NodeHasOptInFlag && NumOps < 4) {
|
|
for (unsigned i = 0; i != NumOps; ++i)
|
|
Code += ", " + AllOps[i];
|
|
} else {
|
|
std::string OpsCode = "SDValue Ops" + utostr(OpsNo) + "[] = { ";
|
|
for (unsigned i = 0; i != NumOps; ++i) {
|
|
OpsCode += AllOps[i];
|
|
if (i != NumOps-1)
|
|
OpsCode += ", ";
|
|
}
|
|
emitCode(OpsCode + " };");
|
|
Code += ", Ops" + utostr(OpsNo) + ", ";
|
|
if (NodeHasOptInFlag) {
|
|
Code += "HasInFlag ? ";
|
|
Code += utostr(NumOps) + " : " + utostr(NumOps-1);
|
|
} else
|
|
Code += utostr(NumOps);
|
|
}
|
|
}
|
|
|
|
if (!isRoot)
|
|
Code += "), 0";
|
|
|
|
std::vector<std::string> ReplaceFroms;
|
|
std::vector<std::string> ReplaceTos;
|
|
if (!isRoot) {
|
|
NodeOps.push_back("Tmp" + utostr(ResNo));
|
|
} else {
|
|
|
|
if (NodeHasOutFlag) {
|
|
if (!InFlagDecled) {
|
|
After.push_back("SDValue InFlag(ResNode, " +
|
|
utostr(NumResults+NumDstRegs+(unsigned)NodeHasChain) +
|
|
");");
|
|
InFlagDecled = true;
|
|
} else
|
|
After.push_back("InFlag = SDValue(ResNode, " +
|
|
utostr(NumResults+NumDstRegs+(unsigned)NodeHasChain) +
|
|
");");
|
|
}
|
|
|
|
for (unsigned j = 0, e = FoldedChains.size(); j < e; j++) {
|
|
ReplaceFroms.push_back("SDValue(" +
|
|
FoldedChains[j].first + ".getNode(), " +
|
|
utostr(FoldedChains[j].second) +
|
|
")");
|
|
ReplaceTos.push_back("SDValue(ResNode, " +
|
|
utostr(NumResults+NumDstRegs) + ")");
|
|
}
|
|
|
|
if (NodeHasOutFlag) {
|
|
if (FoldedFlag.first != "") {
|
|
ReplaceFroms.push_back("SDValue(" + FoldedFlag.first + ".getNode(), " +
|
|
utostr(FoldedFlag.second) + ")");
|
|
ReplaceTos.push_back("InFlag");
|
|
} else {
|
|
assert(NodeHasProperty(Pattern, SDNPOutFlag, CGP));
|
|
ReplaceFroms.push_back("SDValue(N, " +
|
|
utostr(NumPatResults + (unsigned)InputHasChain)
|
|
+ ")");
|
|
ReplaceTos.push_back("InFlag");
|
|
}
|
|
}
|
|
|
|
if (!ReplaceFroms.empty() && InputHasChain) {
|
|
ReplaceFroms.push_back("SDValue(N, " +
|
|
utostr(NumPatResults) + ")");
|
|
ReplaceTos.push_back("SDValue(" + ChainName + ".getNode(), " +
|
|
ChainName + ".getResNo()" + ")");
|
|
ChainAssignmentNeeded |= NodeHasChain;
|
|
}
|
|
|
|
// User does not expect the instruction would produce a chain!
|
|
if ((!InputHasChain && NodeHasChain) && NodeHasOutFlag) {
|
|
;
|
|
} else if (InputHasChain && !NodeHasChain) {
|
|
// One of the inner node produces a chain.
|
|
assert(!NodeHasOutFlag && "Node has flag but not chain!");
|
|
ReplaceFroms.push_back("SDValue(N, " +
|
|
utostr(NumPatResults) + ")");
|
|
ReplaceTos.push_back(ChainName);
|
|
}
|
|
}
|
|
|
|
if (ChainAssignmentNeeded) {
|
|
// Remember which op produces the chain.
|
|
std::string ChainAssign;
|
|
if (!isRoot)
|
|
ChainAssign = ChainName + " = SDValue(" + NodeName +
|
|
".getNode(), " + utostr(NumResults+NumDstRegs) + ");";
|
|
else
|
|
ChainAssign = ChainName + " = SDValue(" + NodeName +
|
|
", " + utostr(NumResults+NumDstRegs) + ");";
|
|
|
|
After.push_front(ChainAssign);
|
|
}
|
|
|
|
if (ReplaceFroms.size() == 1) {
|
|
After.push_back("ReplaceUses(" + ReplaceFroms[0] + ", " +
|
|
ReplaceTos[0] + ");");
|
|
} else if (!ReplaceFroms.empty()) {
|
|
After.push_back("const SDValue Froms[] = {");
|
|
for (unsigned i = 0, e = ReplaceFroms.size(); i != e; ++i)
|
|
After.push_back(" " + ReplaceFroms[i] + (i + 1 != e ? "," : ""));
|
|
After.push_back("};");
|
|
After.push_back("const SDValue Tos[] = {");
|
|
for (unsigned i = 0, e = ReplaceFroms.size(); i != e; ++i)
|
|
After.push_back(" " + ReplaceTos[i] + (i + 1 != e ? "," : ""));
|
|
After.push_back("};");
|
|
After.push_back("ReplaceUses(Froms, Tos, " +
|
|
itostr(ReplaceFroms.size()) + ");");
|
|
}
|
|
|
|
// We prefer to use SelectNodeTo since it avoids allocation when
|
|
// possible and it avoids CSE map recalculation for the node's
|
|
// users, however it's tricky to use in a non-root context.
|
|
//
|
|
// We also don't use SelectNodeTo if the pattern replacement is being
|
|
// used to jettison a chain result, since morphing the node in place
|
|
// would leave users of the chain dangling.
|
|
//
|
|
if (!isRoot || (InputHasChain && !NodeHasChain)) {
|
|
Code = "CurDAG->getMachineNode(" + Code;
|
|
} else {
|
|
Code = "CurDAG->SelectNodeTo(N, " + Code;
|
|
}
|
|
if (isRoot) {
|
|
if (After.empty())
|
|
CodePrefix = "return ";
|
|
else
|
|
After.push_back("return ResNode;");
|
|
}
|
|
|
|
emitCode(CodePrefix + Code + ");");
|
|
|
|
if (GenDebug) {
|
|
if (!isRoot) {
|
|
emitCode("CurDAG->setSubgraphColor(" + NodeName +".getNode(), \"yellow\");");
|
|
emitCode("CurDAG->setSubgraphColor(" + NodeName +".getNode(), \"black\");");
|
|
}
|
|
else {
|
|
emitCode("CurDAG->setSubgraphColor(" + NodeName +", \"yellow\");");
|
|
emitCode("CurDAG->setSubgraphColor(" + NodeName +", \"black\");");
|
|
}
|
|
}
|
|
|
|
for (unsigned i = 0, e = After.size(); i != e; ++i)
|
|
emitCode(After[i]);
|
|
|
|
return NodeOps;
|
|
}
|
|
if (Op->isSubClassOf("SDNodeXForm")) {
|
|
assert(N->getNumChildren() == 1 && "node xform should have one child!");
|
|
// PatLeaf node - the operand may or may not be a leaf node. But it should
|
|
// behave like one.
|
|
std::vector<std::string> Ops =
|
|
EmitResultCode(N->getChild(0), DstRegs, InFlagDecled,
|
|
ResNodeDecled, true);
|
|
unsigned ResNo = TmpNo++;
|
|
emitCode("SDValue Tmp" + utostr(ResNo) + " = Transform_" + Op->getName()
|
|
+ "(" + Ops.back() + ".getNode());");
|
|
NodeOps.push_back("Tmp" + utostr(ResNo));
|
|
if (isRoot)
|
|
emitCode("return Tmp" + utostr(ResNo) + ".getNode();");
|
|
return NodeOps;
|
|
}
|
|
|
|
N->dump();
|
|
errs() << "\n";
|
|
throw std::string("Unknown node in result pattern!");
|
|
}
|
|
|
|
/// InsertOneTypeCheck - Insert a type-check for an unresolved type in 'Pat'
|
|
/// and add it to the tree. 'Pat' and 'Other' are isomorphic trees except that
|
|
/// 'Pat' may be missing types. If we find an unresolved type to add a check
|
|
/// for, this returns true otherwise false if Pat has all types.
|
|
bool InsertOneTypeCheck(TreePatternNode *Pat, TreePatternNode *Other,
|
|
const std::string &Prefix, bool isRoot = false) {
|
|
// Did we find one?
|
|
if (Pat->getExtTypes() != Other->getExtTypes()) {
|
|
// Move a type over from 'other' to 'pat'.
|
|
Pat->setTypes(Other->getExtTypes());
|
|
// The top level node type is checked outside of the select function.
|
|
if (!isRoot)
|
|
emitCheck(Prefix + ".getValueType() == " +
|
|
getName(Pat->getTypeNum(0)));
|
|
return true;
|
|
}
|
|
|
|
unsigned OpNo =
|
|
(unsigned) NodeHasProperty(Pat, SDNPHasChain, CGP);
|
|
for (unsigned i = 0, e = Pat->getNumChildren(); i != e; ++i, ++OpNo)
|
|
if (InsertOneTypeCheck(Pat->getChild(i), Other->getChild(i),
|
|
Prefix + utostr(OpNo)))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
private:
|
|
/// EmitInFlagSelectCode - Emit the flag operands for the DAG that is
|
|
/// being built.
|
|
void EmitInFlagSelectCode(TreePatternNode *N, const std::string &RootName,
|
|
bool &ChainEmitted, bool &InFlagDecled,
|
|
bool &ResNodeDecled, bool isRoot = false) {
|
|
const CodeGenTarget &T = CGP.getTargetInfo();
|
|
unsigned OpNo =
|
|
(unsigned) NodeHasProperty(N, SDNPHasChain, CGP);
|
|
bool HasInFlag = NodeHasProperty(N, SDNPInFlag, CGP);
|
|
for (unsigned i = 0, e = N->getNumChildren(); i != e; ++i, ++OpNo) {
|
|
TreePatternNode *Child = N->getChild(i);
|
|
if (!Child->isLeaf()) {
|
|
EmitInFlagSelectCode(Child, RootName + utostr(OpNo), ChainEmitted,
|
|
InFlagDecled, ResNodeDecled);
|
|
} else {
|
|
if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
|
|
if (!Child->getName().empty()) {
|
|
std::string Name = RootName + utostr(OpNo);
|
|
if (Duplicates.find(Name) != Duplicates.end())
|
|
// A duplicate! Do not emit a copy for this node.
|
|
continue;
|
|
}
|
|
|
|
Record *RR = DI->getDef();
|
|
if (RR->isSubClassOf("Register")) {
|
|
MVT::SimpleValueType RVT = getRegisterValueType(RR, T);
|
|
if (RVT == MVT::Flag) {
|
|
if (!InFlagDecled) {
|
|
emitCode("SDValue InFlag = " +
|
|
getValueName(RootName + utostr(OpNo)) + ";");
|
|
InFlagDecled = true;
|
|
} else
|
|
emitCode("InFlag = " +
|
|
getValueName(RootName + utostr(OpNo)) + ";");
|
|
} else {
|
|
if (!ChainEmitted) {
|
|
emitCode("SDValue Chain = CurDAG->getEntryNode();");
|
|
ChainName = "Chain";
|
|
ChainEmitted = true;
|
|
}
|
|
if (!InFlagDecled) {
|
|
emitCode("SDValue InFlag(0, 0);");
|
|
InFlagDecled = true;
|
|
}
|
|
std::string Decl = (!ResNodeDecled) ? "SDNode *" : "";
|
|
emitCode(Decl + "ResNode = CurDAG->getCopyToReg(" + ChainName +
|
|
", " + getNodeName(RootName) + "->getDebugLoc()" +
|
|
", " + getQualifiedName(RR) +
|
|
", " + getValueName(RootName + utostr(OpNo)) +
|
|
", InFlag).getNode();");
|
|
ResNodeDecled = true;
|
|
emitCode(ChainName + " = SDValue(ResNode, 0);");
|
|
emitCode("InFlag = SDValue(ResNode, 1);");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (HasInFlag) {
|
|
if (!InFlagDecled) {
|
|
emitCode("SDValue InFlag = " + getNodeName(RootName) +
|
|
"->getOperand(" + utostr(OpNo) + ");");
|
|
InFlagDecled = true;
|
|
} else
|
|
emitCode("InFlag = " + getNodeName(RootName) +
|
|
"->getOperand(" + utostr(OpNo) + ");");
|
|
}
|
|
}
|
|
};
|
|
|
|
/// EmitCodeForPattern - Given a pattern to match, emit code to the specified
|
|
/// stream to match the pattern, and generate the code for the match if it
|
|
/// succeeds. Returns true if the pattern is not guaranteed to match.
|
|
void DAGISelEmitter::GenerateCodeForPattern(const PatternToMatch &Pattern,
|
|
std::vector<std::pair<unsigned, std::string> > &GeneratedCode,
|
|
std::set<std::string> &GeneratedDecl,
|
|
std::vector<std::string> &TargetOpcodes,
|
|
std::vector<std::string> &TargetVTs,
|
|
bool &OutputIsVariadic,
|
|
unsigned &NumInputRootOps) {
|
|
OutputIsVariadic = false;
|
|
NumInputRootOps = 0;
|
|
|
|
PatternCodeEmitter Emitter(CGP, Pattern.getPredicateCheck(),
|
|
Pattern.getSrcPattern(), Pattern.getDstPattern(),
|
|
GeneratedCode, GeneratedDecl,
|
|
TargetOpcodes, TargetVTs,
|
|
OutputIsVariadic, NumInputRootOps);
|
|
|
|
// Emit the matcher, capturing named arguments in VariableMap.
|
|
bool FoundChain = false;
|
|
Emitter.EmitMatchCode(Pattern.getSrcPattern(), NULL, "N", "", FoundChain);
|
|
|
|
// TP - Get *SOME* tree pattern, we don't care which.
|
|
TreePattern &TP = *CGP.pf_begin()->second;
|
|
|
|
// At this point, we know that we structurally match the pattern, but the
|
|
// types of the nodes may not match. Figure out the fewest number of type
|
|
// comparisons we need to emit. For example, if there is only one integer
|
|
// type supported by a target, there should be no type comparisons at all for
|
|
// integer patterns!
|
|
//
|
|
// To figure out the fewest number of type checks needed, clone the pattern,
|
|
// remove the types, then perform type inference on the pattern as a whole.
|
|
// If there are unresolved types, emit an explicit check for those types,
|
|
// apply the type to the tree, then rerun type inference. Iterate until all
|
|
// types are resolved.
|
|
//
|
|
TreePatternNode *Pat = Pattern.getSrcPattern()->clone();
|
|
RemoveAllTypes(Pat);
|
|
|
|
do {
|
|
// Resolve/propagate as many types as possible.
|
|
try {
|
|
bool MadeChange = true;
|
|
while (MadeChange)
|
|
MadeChange = Pat->ApplyTypeConstraints(TP,
|
|
true/*Ignore reg constraints*/);
|
|
} catch (...) {
|
|
assert(0 && "Error: could not find consistent types for something we"
|
|
" already decided was ok!");
|
|
abort();
|
|
}
|
|
|
|
// Insert a check for an unresolved type and add it to the tree. If we find
|
|
// an unresolved type to add a check for, this returns true and we iterate,
|
|
// otherwise we are done.
|
|
} while (Emitter.InsertOneTypeCheck(Pat, Pattern.getSrcPattern(), "N", true));
|
|
|
|
Emitter.EmitResultCode(Pattern.getDstPattern(), Pattern.getDstRegs(),
|
|
false, false, false, true);
|
|
delete Pat;
|
|
}
|
|
|
|
/// EraseCodeLine - Erase one code line from all of the patterns. If removing
|
|
/// a line causes any of them to be empty, remove them and return true when
|
|
/// done.
|
|
static bool EraseCodeLine(std::vector<std::pair<const PatternToMatch*,
|
|
std::vector<std::pair<unsigned, std::string> > > >
|
|
&Patterns) {
|
|
bool ErasedPatterns = false;
|
|
for (unsigned i = 0, e = Patterns.size(); i != e; ++i) {
|
|
Patterns[i].second.pop_back();
|
|
if (Patterns[i].second.empty()) {
|
|
Patterns.erase(Patterns.begin()+i);
|
|
--i; --e;
|
|
ErasedPatterns = true;
|
|
}
|
|
}
|
|
return ErasedPatterns;
|
|
}
|
|
|
|
/// EmitPatterns - Emit code for at least one pattern, but try to group common
|
|
/// code together between the patterns.
|
|
void DAGISelEmitter::EmitPatterns(std::vector<std::pair<const PatternToMatch*,
|
|
std::vector<std::pair<unsigned, std::string> > > >
|
|
&Patterns, unsigned Indent,
|
|
raw_ostream &OS) {
|
|
typedef std::pair<unsigned, std::string> CodeLine;
|
|
typedef std::vector<CodeLine> CodeList;
|
|
typedef std::vector<std::pair<const PatternToMatch*, CodeList> > PatternList;
|
|
|
|
if (Patterns.empty()) return;
|
|
|
|
// Figure out how many patterns share the next code line. Explicitly copy
|
|
// FirstCodeLine so that we don't invalidate a reference when changing
|
|
// Patterns.
|
|
const CodeLine FirstCodeLine = Patterns.back().second.back();
|
|
unsigned LastMatch = Patterns.size()-1;
|
|
while (LastMatch != 0 && Patterns[LastMatch-1].second.back() == FirstCodeLine)
|
|
--LastMatch;
|
|
|
|
// If not all patterns share this line, split the list into two pieces. The
|
|
// first chunk will use this line, the second chunk won't.
|
|
if (LastMatch != 0) {
|
|
PatternList Shared(Patterns.begin()+LastMatch, Patterns.end());
|
|
PatternList Other(Patterns.begin(), Patterns.begin()+LastMatch);
|
|
|
|
// FIXME: Emit braces?
|
|
if (Shared.size() == 1) {
|
|
const PatternToMatch &Pattern = *Shared.back().first;
|
|
OS << "\n" << std::string(Indent, ' ') << "// Pattern: ";
|
|
Pattern.getSrcPattern()->print(OS);
|
|
OS << "\n" << std::string(Indent, ' ') << "// Emits: ";
|
|
Pattern.getDstPattern()->print(OS);
|
|
OS << "\n";
|
|
unsigned AddedComplexity = Pattern.getAddedComplexity();
|
|
OS << std::string(Indent, ' ') << "// Pattern complexity = "
|
|
<< getPatternSize(Pattern.getSrcPattern(), CGP) + AddedComplexity
|
|
<< " cost = "
|
|
<< getResultPatternCost(Pattern.getDstPattern(), CGP)
|
|
<< " size = "
|
|
<< getResultPatternSize(Pattern.getDstPattern(), CGP) << "\n";
|
|
}
|
|
if (FirstCodeLine.first != 1) {
|
|
OS << std::string(Indent, ' ') << "{\n";
|
|
Indent += 2;
|
|
}
|
|
EmitPatterns(Shared, Indent, OS);
|
|
if (FirstCodeLine.first != 1) {
|
|
Indent -= 2;
|
|
OS << std::string(Indent, ' ') << "}\n";
|
|
}
|
|
|
|
if (Other.size() == 1) {
|
|
const PatternToMatch &Pattern = *Other.back().first;
|
|
OS << "\n" << std::string(Indent, ' ') << "// Pattern: ";
|
|
Pattern.getSrcPattern()->print(OS);
|
|
OS << "\n" << std::string(Indent, ' ') << "// Emits: ";
|
|
Pattern.getDstPattern()->print(OS);
|
|
OS << "\n";
|
|
unsigned AddedComplexity = Pattern.getAddedComplexity();
|
|
OS << std::string(Indent, ' ') << "// Pattern complexity = "
|
|
<< getPatternSize(Pattern.getSrcPattern(), CGP) + AddedComplexity
|
|
<< " cost = "
|
|
<< getResultPatternCost(Pattern.getDstPattern(), CGP)
|
|
<< " size = "
|
|
<< getResultPatternSize(Pattern.getDstPattern(), CGP) << "\n";
|
|
}
|
|
EmitPatterns(Other, Indent, OS);
|
|
return;
|
|
}
|
|
|
|
// Remove this code from all of the patterns that share it.
|
|
bool ErasedPatterns = EraseCodeLine(Patterns);
|
|
|
|
bool isPredicate = FirstCodeLine.first == 1;
|
|
|
|
// Otherwise, every pattern in the list has this line. Emit it.
|
|
if (!isPredicate) {
|
|
// Normal code.
|
|
OS << std::string(Indent, ' ') << FirstCodeLine.second << "\n";
|
|
} else {
|
|
OS << std::string(Indent, ' ') << "if (" << FirstCodeLine.second;
|
|
|
|
// If the next code line is another predicate, and if all of the pattern
|
|
// in this group share the same next line, emit it inline now. Do this
|
|
// until we run out of common predicates.
|
|
while (!ErasedPatterns && Patterns.back().second.back().first == 1) {
|
|
// Check that all of the patterns in Patterns end with the same predicate.
|
|
bool AllEndWithSamePredicate = true;
|
|
for (unsigned i = 0, e = Patterns.size(); i != e; ++i)
|
|
if (Patterns[i].second.back() != Patterns.back().second.back()) {
|
|
AllEndWithSamePredicate = false;
|
|
break;
|
|
}
|
|
// If all of the predicates aren't the same, we can't share them.
|
|
if (!AllEndWithSamePredicate) break;
|
|
|
|
// Otherwise we can. Emit it shared now.
|
|
OS << " &&\n" << std::string(Indent+4, ' ')
|
|
<< Patterns.back().second.back().second;
|
|
ErasedPatterns = EraseCodeLine(Patterns);
|
|
}
|
|
|
|
OS << ") {\n";
|
|
Indent += 2;
|
|
}
|
|
|
|
EmitPatterns(Patterns, Indent, OS);
|
|
|
|
if (isPredicate)
|
|
OS << std::string(Indent-2, ' ') << "}\n";
|
|
}
|
|
|
|
static std::string getLegalCName(std::string OpName) {
|
|
std::string::size_type pos = OpName.find("::");
|
|
if (pos != std::string::npos)
|
|
OpName.replace(pos, 2, "_");
|
|
return OpName;
|
|
}
|
|
|
|
void DAGISelEmitter::EmitInstructionSelector(raw_ostream &OS) {
|
|
const CodeGenTarget &Target = CGP.getTargetInfo();
|
|
|
|
// Get the namespace to insert instructions into.
|
|
std::string InstNS = Target.getInstNamespace();
|
|
if (!InstNS.empty()) InstNS += "::";
|
|
|
|
// Group the patterns by their top-level opcodes.
|
|
std::map<std::string, std::vector<const PatternToMatch*> > PatternsByOpcode;
|
|
// All unique target node emission functions.
|
|
std::map<std::string, unsigned> EmitFunctions;
|
|
for (CodeGenDAGPatterns::ptm_iterator I = CGP.ptm_begin(),
|
|
E = CGP.ptm_end(); I != E; ++I) {
|
|
const PatternToMatch &Pattern = *I;
|
|
|
|
TreePatternNode *Node = Pattern.getSrcPattern();
|
|
if (!Node->isLeaf()) {
|
|
PatternsByOpcode[getOpcodeName(Node->getOperator(), CGP)].
|
|
push_back(&Pattern);
|
|
} else {
|
|
const ComplexPattern *CP;
|
|
if (dynamic_cast<IntInit*>(Node->getLeafValue())) {
|
|
PatternsByOpcode[getOpcodeName(CGP.getSDNodeNamed("imm"), CGP)].
|
|
push_back(&Pattern);
|
|
} else if ((CP = NodeGetComplexPattern(Node, CGP))) {
|
|
std::vector<Record*> OpNodes = CP->getRootNodes();
|
|
for (unsigned j = 0, e = OpNodes.size(); j != e; j++) {
|
|
PatternsByOpcode[getOpcodeName(OpNodes[j], CGP)]
|
|
.insert(PatternsByOpcode[getOpcodeName(OpNodes[j], CGP)].begin(),
|
|
&Pattern);
|
|
}
|
|
} else {
|
|
errs() << "Unrecognized opcode '";
|
|
Node->dump();
|
|
errs() << "' on tree pattern '";
|
|
errs() << Pattern.getDstPattern()->getOperator()->getName() << "'!\n";
|
|
exit(1);
|
|
}
|
|
}
|
|
}
|
|
|
|
// For each opcode, there might be multiple select functions, one per
|
|
// ValueType of the node (or its first operand if it doesn't produce a
|
|
// non-chain result.
|
|
std::map<std::string, std::vector<std::string> > OpcodeVTMap;
|
|
|
|
// Emit one Select_* method for each top-level opcode. We do this instead of
|
|
// emitting one giant switch statement to support compilers where this will
|
|
// result in the recursive functions taking less stack space.
|
|
for (std::map<std::string, std::vector<const PatternToMatch*> >::iterator
|
|
PBOI = PatternsByOpcode.begin(), E = PatternsByOpcode.end();
|
|
PBOI != E; ++PBOI) {
|
|
const std::string &OpName = PBOI->first;
|
|
std::vector<const PatternToMatch*> &PatternsOfOp = PBOI->second;
|
|
assert(!PatternsOfOp.empty() && "No patterns but map has entry?");
|
|
|
|
// Split them into groups by type.
|
|
std::map<MVT::SimpleValueType,
|
|
std::vector<const PatternToMatch*> > PatternsByType;
|
|
for (unsigned i = 0, e = PatternsOfOp.size(); i != e; ++i) {
|
|
const PatternToMatch *Pat = PatternsOfOp[i];
|
|
TreePatternNode *SrcPat = Pat->getSrcPattern();
|
|
PatternsByType[SrcPat->getTypeNum(0)].push_back(Pat);
|
|
}
|
|
|
|
for (std::map<MVT::SimpleValueType,
|
|
std::vector<const PatternToMatch*> >::iterator
|
|
II = PatternsByType.begin(), EE = PatternsByType.end(); II != EE;
|
|
++II) {
|
|
MVT::SimpleValueType OpVT = II->first;
|
|
std::vector<const PatternToMatch*> &Patterns = II->second;
|
|
typedef std::pair<unsigned, std::string> CodeLine;
|
|
typedef std::vector<CodeLine> CodeList;
|
|
typedef CodeList::iterator CodeListI;
|
|
|
|
std::vector<std::pair<const PatternToMatch*, CodeList> > CodeForPatterns;
|
|
std::vector<std::vector<std::string> > PatternOpcodes;
|
|
std::vector<std::vector<std::string> > PatternVTs;
|
|
std::vector<std::set<std::string> > PatternDecls;
|
|
std::vector<bool> OutputIsVariadicFlags;
|
|
std::vector<unsigned> NumInputRootOpsCounts;
|
|
for (unsigned i = 0, e = Patterns.size(); i != e; ++i) {
|
|
CodeList GeneratedCode;
|
|
std::set<std::string> GeneratedDecl;
|
|
std::vector<std::string> TargetOpcodes;
|
|
std::vector<std::string> TargetVTs;
|
|
bool OutputIsVariadic;
|
|
unsigned NumInputRootOps;
|
|
GenerateCodeForPattern(*Patterns[i], GeneratedCode, GeneratedDecl,
|
|
TargetOpcodes, TargetVTs,
|
|
OutputIsVariadic, NumInputRootOps);
|
|
CodeForPatterns.push_back(std::make_pair(Patterns[i], GeneratedCode));
|
|
PatternDecls.push_back(GeneratedDecl);
|
|
PatternOpcodes.push_back(TargetOpcodes);
|
|
PatternVTs.push_back(TargetVTs);
|
|
OutputIsVariadicFlags.push_back(OutputIsVariadic);
|
|
NumInputRootOpsCounts.push_back(NumInputRootOps);
|
|
}
|
|
|
|
// Factor target node emission code (emitted by EmitResultCode) into
|
|
// separate functions. Uniquing and share them among all instruction
|
|
// selection routines.
|
|
for (unsigned i = 0, e = CodeForPatterns.size(); i != e; ++i) {
|
|
CodeList &GeneratedCode = CodeForPatterns[i].second;
|
|
std::vector<std::string> &TargetOpcodes = PatternOpcodes[i];
|
|
std::vector<std::string> &TargetVTs = PatternVTs[i];
|
|
std::set<std::string> Decls = PatternDecls[i];
|
|
bool OutputIsVariadic = OutputIsVariadicFlags[i];
|
|
unsigned NumInputRootOps = NumInputRootOpsCounts[i];
|
|
std::vector<std::string> AddedInits;
|
|
int CodeSize = (int)GeneratedCode.size();
|
|
int LastPred = -1;
|
|
for (int j = CodeSize-1; j >= 0; --j) {
|
|
if (LastPred == -1 && GeneratedCode[j].first == 1)
|
|
LastPred = j;
|
|
else if (LastPred != -1 && GeneratedCode[j].first == 2)
|
|
AddedInits.push_back(GeneratedCode[j].second);
|
|
}
|
|
|
|
std::string CalleeCode = "(SDNode *N";
|
|
std::string CallerCode = "(N";
|
|
for (unsigned j = 0, e = TargetOpcodes.size(); j != e; ++j) {
|
|
CalleeCode += ", unsigned Opc" + utostr(j);
|
|
CallerCode += ", " + TargetOpcodes[j];
|
|
}
|
|
for (unsigned j = 0, e = TargetVTs.size(); j != e; ++j) {
|
|
CalleeCode += ", MVT::SimpleValueType VT" + utostr(j);
|
|
CallerCode += ", " + TargetVTs[j];
|
|
}
|
|
for (std::set<std::string>::iterator
|
|
I = Decls.begin(), E = Decls.end(); I != E; ++I) {
|
|
std::string Name = *I;
|
|
CalleeCode += ", SDValue &" + Name;
|
|
CallerCode += ", " + Name;
|
|
}
|
|
|
|
if (OutputIsVariadic) {
|
|
CalleeCode += ", unsigned NumInputRootOps";
|
|
CallerCode += ", " + utostr(NumInputRootOps);
|
|
}
|
|
|
|
CallerCode += ");";
|
|
CalleeCode += ") {\n";
|
|
|
|
for (std::vector<std::string>::const_reverse_iterator
|
|
I = AddedInits.rbegin(), E = AddedInits.rend(); I != E; ++I)
|
|
CalleeCode += " " + *I + "\n";
|
|
|
|
for (int j = LastPred+1; j < CodeSize; ++j)
|
|
CalleeCode += " " + GeneratedCode[j].second + "\n";
|
|
for (int j = LastPred+1; j < CodeSize; ++j)
|
|
GeneratedCode.pop_back();
|
|
CalleeCode += "}\n";
|
|
|
|
// Uniquing the emission routines.
|
|
unsigned EmitFuncNum;
|
|
std::map<std::string, unsigned>::iterator EFI =
|
|
EmitFunctions.find(CalleeCode);
|
|
if (EFI != EmitFunctions.end()) {
|
|
EmitFuncNum = EFI->second;
|
|
} else {
|
|
EmitFuncNum = EmitFunctions.size();
|
|
EmitFunctions.insert(std::make_pair(CalleeCode, EmitFuncNum));
|
|
// Prevent emission routines from being inlined to reduce selection
|
|
// routines stack frame sizes.
|
|
OS << "DISABLE_INLINE ";
|
|
OS << "SDNode *Emit_" << utostr(EmitFuncNum) << CalleeCode;
|
|
}
|
|
|
|
// Replace the emission code within selection routines with calls to the
|
|
// emission functions.
|
|
if (GenDebug) {
|
|
GeneratedCode.push_back(std::make_pair(0, "CurDAG->setSubgraphColor(N, \"red\");"));
|
|
}
|
|
CallerCode = "SDNode *Result = Emit_" + utostr(EmitFuncNum) + CallerCode;
|
|
GeneratedCode.push_back(std::make_pair(3, CallerCode));
|
|
if (GenDebug) {
|
|
GeneratedCode.push_back(std::make_pair(0, "if(Result) {"));
|
|
GeneratedCode.push_back(std::make_pair(0, " CurDAG->setSubgraphColor(Result, \"yellow\");"));
|
|
GeneratedCode.push_back(std::make_pair(0, " CurDAG->setSubgraphColor(Result, \"black\");"));
|
|
GeneratedCode.push_back(std::make_pair(0, "}"));
|
|
//GeneratedCode.push_back(std::make_pair(0, "CurDAG->setSubgraphColor(N, \"black\");"));
|
|
}
|
|
GeneratedCode.push_back(std::make_pair(0, "return Result;"));
|
|
}
|
|
|
|
// Print function.
|
|
std::string OpVTStr;
|
|
if (OpVT == MVT::iPTR) {
|
|
OpVTStr = "_iPTR";
|
|
} else if (OpVT == MVT::iPTRAny) {
|
|
OpVTStr = "_iPTRAny";
|
|
} else if (OpVT == MVT::isVoid) {
|
|
// Nodes with a void result actually have a first result type of either
|
|
// Other (a chain) or Flag. Since there is no one-to-one mapping from
|
|
// void to this case, we handle it specially here.
|
|
} else {
|
|
OpVTStr = "_" + getEnumName(OpVT).substr(5); // Skip 'MVT::'
|
|
}
|
|
std::map<std::string, std::vector<std::string> >::iterator OpVTI =
|
|
OpcodeVTMap.find(OpName);
|
|
if (OpVTI == OpcodeVTMap.end()) {
|
|
std::vector<std::string> VTSet;
|
|
VTSet.push_back(OpVTStr);
|
|
OpcodeVTMap.insert(std::make_pair(OpName, VTSet));
|
|
} else
|
|
OpVTI->second.push_back(OpVTStr);
|
|
|
|
// We want to emit all of the matching code now. However, we want to emit
|
|
// the matches in order of minimal cost. Sort the patterns so the least
|
|
// cost one is at the start.
|
|
std::stable_sort(CodeForPatterns.begin(), CodeForPatterns.end(),
|
|
PatternSortingPredicate(CGP));
|
|
|
|
// Scan the code to see if all of the patterns are reachable and if it is
|
|
// possible that the last one might not match.
|
|
bool mightNotMatch = true;
|
|
for (unsigned i = 0, e = CodeForPatterns.size(); i != e; ++i) {
|
|
CodeList &GeneratedCode = CodeForPatterns[i].second;
|
|
mightNotMatch = false;
|
|
|
|
for (unsigned j = 0, e = GeneratedCode.size(); j != e; ++j) {
|
|
if (GeneratedCode[j].first == 1) { // predicate.
|
|
mightNotMatch = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// If this pattern definitely matches, and if it isn't the last one, the
|
|
// patterns after it CANNOT ever match. Error out.
|
|
if (mightNotMatch == false && i != CodeForPatterns.size()-1) {
|
|
errs() << "Pattern '";
|
|
CodeForPatterns[i].first->getSrcPattern()->print(errs());
|
|
errs() << "' is impossible to select!\n";
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
// Loop through and reverse all of the CodeList vectors, as we will be
|
|
// accessing them from their logical front, but accessing the end of a
|
|
// vector is more efficient.
|
|
for (unsigned i = 0, e = CodeForPatterns.size(); i != e; ++i) {
|
|
CodeList &GeneratedCode = CodeForPatterns[i].second;
|
|
std::reverse(GeneratedCode.begin(), GeneratedCode.end());
|
|
}
|
|
|
|
// Next, reverse the list of patterns itself for the same reason.
|
|
std::reverse(CodeForPatterns.begin(), CodeForPatterns.end());
|
|
|
|
OS << "SDNode *Select_" << getLegalCName(OpName)
|
|
<< OpVTStr << "(SDNode *N) {\n";
|
|
|
|
// Emit all of the patterns now, grouped together to share code.
|
|
EmitPatterns(CodeForPatterns, 2, OS);
|
|
|
|
// If the last pattern has predicates (which could fail) emit code to
|
|
// catch the case where nothing handles a pattern.
|
|
if (mightNotMatch) {
|
|
OS << "\n";
|
|
if (OpName != "ISD::INTRINSIC_W_CHAIN" &&
|
|
OpName != "ISD::INTRINSIC_WO_CHAIN" &&
|
|
OpName != "ISD::INTRINSIC_VOID")
|
|
OS << " CannotYetSelect(N);\n";
|
|
else
|
|
OS << " CannotYetSelectIntrinsic(N);\n";
|
|
|
|
OS << " return NULL;\n";
|
|
}
|
|
OS << "}\n\n";
|
|
}
|
|
}
|
|
|
|
OS << "// The main instruction selector code.\n"
|
|
<< "SDNode *SelectCode(SDNode *N) {\n"
|
|
<< " MVT::SimpleValueType NVT = N->getValueType(0).getSimpleVT().SimpleTy;\n"
|
|
<< " switch (N->getOpcode()) {\n"
|
|
<< " default:\n"
|
|
<< " assert(!N->isMachineOpcode() && \"Node already selected!\");\n"
|
|
<< " break;\n"
|
|
<< " case ISD::EntryToken: // These nodes remain the same.\n"
|
|
<< " case ISD::BasicBlock:\n"
|
|
<< " case ISD::Register:\n"
|
|
<< " case ISD::HANDLENODE:\n"
|
|
<< " case ISD::TargetConstant:\n"
|
|
<< " case ISD::TargetConstantFP:\n"
|
|
<< " case ISD::TargetConstantPool:\n"
|
|
<< " case ISD::TargetFrameIndex:\n"
|
|
<< " case ISD::TargetExternalSymbol:\n"
|
|
<< " case ISD::TargetBlockAddress:\n"
|
|
<< " case ISD::TargetJumpTable:\n"
|
|
<< " case ISD::TargetGlobalTLSAddress:\n"
|
|
<< " case ISD::TargetGlobalAddress:\n"
|
|
<< " case ISD::TokenFactor:\n"
|
|
<< " case ISD::CopyFromReg:\n"
|
|
<< " case ISD::CopyToReg: {\n"
|
|
<< " return NULL;\n"
|
|
<< " }\n"
|
|
<< " case ISD::AssertSext:\n"
|
|
<< " case ISD::AssertZext: {\n"
|
|
<< " ReplaceUses(SDValue(N, 0), N->getOperand(0));\n"
|
|
<< " return NULL;\n"
|
|
<< " }\n"
|
|
<< " case ISD::INLINEASM: return Select_INLINEASM(N);\n"
|
|
<< " case ISD::EH_LABEL: return Select_EH_LABEL(N);\n"
|
|
<< " case ISD::UNDEF: return Select_UNDEF(N);\n";
|
|
|
|
// Loop over all of the case statements, emiting a call to each method we
|
|
// emitted above.
|
|
for (std::map<std::string, std::vector<const PatternToMatch*> >::iterator
|
|
PBOI = PatternsByOpcode.begin(), E = PatternsByOpcode.end();
|
|
PBOI != E; ++PBOI) {
|
|
const std::string &OpName = PBOI->first;
|
|
// Potentially multiple versions of select for this opcode. One for each
|
|
// ValueType of the node (or its first true operand if it doesn't produce a
|
|
// result.
|
|
std::map<std::string, std::vector<std::string> >::iterator OpVTI =
|
|
OpcodeVTMap.find(OpName);
|
|
std::vector<std::string> &OpVTs = OpVTI->second;
|
|
OS << " case " << OpName << ": {\n";
|
|
// If we have only one variant and it's the default, elide the
|
|
// switch. Marginally faster, and makes MSVC happier.
|
|
if (OpVTs.size()==1 && OpVTs[0].empty()) {
|
|
OS << " return Select_" << getLegalCName(OpName) << "(N);\n";
|
|
OS << " break;\n";
|
|
OS << " }\n";
|
|
continue;
|
|
}
|
|
// Keep track of whether we see a pattern that has an iPtr result.
|
|
bool HasPtrPattern = false;
|
|
bool HasDefaultPattern = false;
|
|
|
|
OS << " switch (NVT) {\n";
|
|
for (unsigned i = 0, e = OpVTs.size(); i < e; ++i) {
|
|
std::string &VTStr = OpVTs[i];
|
|
if (VTStr.empty()) {
|
|
HasDefaultPattern = true;
|
|
continue;
|
|
}
|
|
|
|
// If this is a match on iPTR: don't emit it directly, we need special
|
|
// code.
|
|
if (VTStr == "_iPTR") {
|
|
HasPtrPattern = true;
|
|
continue;
|
|
}
|
|
OS << " case MVT::" << VTStr.substr(1) << ":\n"
|
|
<< " return Select_" << getLegalCName(OpName)
|
|
<< VTStr << "(N);\n";
|
|
}
|
|
OS << " default:\n";
|
|
|
|
// If there is an iPTR result version of this pattern, emit it here.
|
|
if (HasPtrPattern) {
|
|
OS << " if (TLI.getPointerTy() == NVT)\n";
|
|
OS << " return Select_" << getLegalCName(OpName) <<"_iPTR(N);\n";
|
|
}
|
|
if (HasDefaultPattern) {
|
|
OS << " return Select_" << getLegalCName(OpName) << "(N);\n";
|
|
}
|
|
OS << " break;\n";
|
|
OS << " }\n";
|
|
OS << " break;\n";
|
|
OS << " }\n";
|
|
}
|
|
|
|
OS << " } // end of big switch.\n\n"
|
|
<< " if (N->getOpcode() != ISD::INTRINSIC_W_CHAIN &&\n"
|
|
<< " N->getOpcode() != ISD::INTRINSIC_WO_CHAIN &&\n"
|
|
<< " N->getOpcode() != ISD::INTRINSIC_VOID) {\n"
|
|
<< " CannotYetSelect(N);\n"
|
|
<< " } else {\n"
|
|
<< " CannotYetSelectIntrinsic(N);\n"
|
|
<< " }\n"
|
|
<< " return NULL;\n"
|
|
<< "}\n\n";
|
|
}
|
|
|
|
void DAGISelEmitter::run(raw_ostream &OS) {
|
|
EmitSourceFileHeader("DAG Instruction Selector for the " +
|
|
CGP.getTargetInfo().getName() + " target", OS);
|
|
|
|
OS << "// *** NOTE: This file is #included into the middle of the target\n"
|
|
<< "// *** instruction selector class. These functions are really "
|
|
<< "methods.\n\n";
|
|
|
|
OS << "// Include standard, target-independent definitions and methods used\n"
|
|
<< "// by the instruction selector.\n";
|
|
OS << "#include \"llvm/CodeGen/DAGISelHeader.h\"\n\n";
|
|
|
|
EmitNodeTransforms(OS);
|
|
EmitPredicateFunctions(OS);
|
|
|
|
DEBUG(errs() << "\n\nALL PATTERNS TO MATCH:\n\n");
|
|
for (CodeGenDAGPatterns::ptm_iterator I = CGP.ptm_begin(), E = CGP.ptm_end();
|
|
I != E; ++I) {
|
|
DEBUG(errs() << "PATTERN: "; I->getSrcPattern()->dump());
|
|
DEBUG(errs() << "\nRESULT: "; I->getDstPattern()->dump());
|
|
DEBUG(errs() << "\n");
|
|
}
|
|
|
|
// At this point, we have full information about the 'Patterns' we need to
|
|
// parse, both implicitly from instructions as well as from explicit pattern
|
|
// definitions. Emit the resultant instruction selector.
|
|
EmitInstructionSelector(OS);
|
|
|
|
}
|