add plumbing for handling multiple result nodes

in some more places.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99366 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenDAGPatterns.cpp

@@ -713,10 +713,11 @@ SDNodeInfo::SDNodeInfo(Record *R) : Def(R) {
 /// getKnownType - If the type constraints on this node imply a fixed type
 /// (e.g. all stores return void, etc), then return it as an
 /// MVT::SimpleValueType.  Otherwise, return EEVT::Other.
-MVT::SimpleValueType SDNodeInfo::getKnownType() const {
+MVT::SimpleValueType SDNodeInfo::getKnownType(unsigned ResNo) const {
   unsigned NumResults = getNumResults();
   assert(NumResults <= 1 &&
          "We only work with nodes with zero or one result so far!");
+  assert(ResNo == 0 && "Only handles single result nodes so far");
   
   for (unsigned i = 0, e = TypeConstraints.size(); i != e; ++i) {
     // Make sure that this applies to the correct node result.

utils/TableGen/CodeGenDAGPatterns.h

@@ -211,7 +211,7 @@ public:
   /// getKnownType - If the type constraints on this node imply a fixed type
   /// (e.g. all stores return void, etc), then return it as an
   /// MVT::SimpleValueType.  Otherwise, return MVT::Other.
-  MVT::SimpleValueType getKnownType() const;
+  MVT::SimpleValueType getKnownType(unsigned ResNo) const;
   
   /// hasProperty - Return true if this node has the specified property.
   ///

utils/TableGen/DAGISelMatcher.cpp

@@ -147,7 +147,8 @@ void SwitchOpcodeMatcher::printImpl(raw_ostream &OS, unsigned indent) const {
 
 
 void CheckTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const {
-  OS.indent(indent) << "CheckType " << getEnumName(Type) << '\n';
+  OS.indent(indent) << "CheckType " << getEnumName(Type) << ", ResNo="
+    << ResNo << '\n';
 }
 
 void SwitchTypeMatcher::printImpl(raw_ostream &OS, unsigned indent) const {
@@ -356,12 +357,11 @@ bool CheckOpcodeMatcher::isContradictoryImpl(const Matcher *M) const {
   // different, then we know they contradict.  For example, a check for
   // ISD::STORE will never be true at the same time a check for Type i32 is.
   if (const CheckTypeMatcher *CT = dyn_cast<CheckTypeMatcher>(M)) {
-    // FIXME: What result is this referring to?
-    MVT::SimpleValueType NodeType;
-    if (getOpcode().getNumResults() == 0)
-      NodeType = MVT::isVoid;
-    else
-      NodeType = getOpcode().getKnownType();
+    // If checking for a result the opcode doesn't have, it can't match.
+    if (CT->getResNo() >= getOpcode().getNumResults())
+      return true;
+    
+    MVT::SimpleValueType NodeType = getOpcode().getKnownType(CT->getResNo());
     if (NodeType != MVT::Other)
       return TypesAreContradictory(NodeType, CT->getType());
   }

utils/TableGen/DAGISelMatcher.h

@@ -492,14 +492,16 @@ private:
 };
   
 /// CheckTypeMatcher - This checks to see if the current node has the
-/// specified type, if not it fails to match.
+/// specified type at the specified result, if not it fails to match.
 class CheckTypeMatcher : public Matcher {
   MVT::SimpleValueType Type;
+  unsigned ResNo;
 public:
-  CheckTypeMatcher(MVT::SimpleValueType type)
-    : Matcher(CheckType), Type(type) {}
+  CheckTypeMatcher(MVT::SimpleValueType type, unsigned resno)
+    : Matcher(CheckType), Type(type), ResNo(resno) {}
   
   MVT::SimpleValueType getType() const { return Type; }
+  unsigned getResNo() const { return ResNo; }
   
   static inline bool classof(const Matcher *N) {
     return N->getKind() == CheckType;

utils/TableGen/DAGISelMatcherEmitter.cpp

@@ -341,6 +341,8 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
   }
 
  case Matcher::CheckType:
+    assert(cast<CheckTypeMatcher>(N)->getResNo() == 0 &&
+           "FIXME: Add support for CheckType of resno != 0");
     OS << "OPC_CheckType, "
        << getEnumName(cast<CheckTypeMatcher>(N)->getType()) << ",\n";
     return 2;

utils/TableGen/DAGISelMatcherGen.cpp

@@ -408,13 +408,13 @@ void MatcherGen::EmitMatchCode(const TreePatternNode *N,
   // If N and NodeNoTypes don't agree on a type, then this is a case where we
   // need to do a type check.  Emit the check, apply the tyep to NodeNoTypes and
   // reinfer any correlated types.
-  bool DoTypeCheck = false;
-  if (NodeNoTypes->getNumTypes() != 0 &&
-      NodeNoTypes->getExtType(0) != N->getExtType(0)) {
-    assert(NodeNoTypes->getNumTypes() == 1 && "FIXME: Handle multiple results");
-    NodeNoTypes->setType(0, N->getExtType(0));
+  SmallVector<unsigned, 2> ResultsToTypeCheck;
+  
+  for (unsigned i = 0, e = NodeNoTypes->getNumTypes(); i != e; ++i) {
+    if (NodeNoTypes->getExtType(i) == N->getExtType(i)) continue;
+    NodeNoTypes->setType(i, N->getExtType(i));
     InferPossibleTypes();
-    DoTypeCheck = true;
+    ResultsToTypeCheck.push_back(i);
   }
   
   // If this node has a name associated with it, capture it in VariableMap. If
@@ -444,10 +444,9 @@ void MatcherGen::EmitMatchCode(const TreePatternNode *N,
   for (unsigned i = 0, e = N->getPredicateFns().size(); i != e; ++i)
     AddMatcher(new CheckPredicateMatcher(N->getPredicateFns()[i]));
   
-  if (DoTypeCheck) {
-    assert(N->getNumTypes() == 1);
-    AddMatcher(new CheckTypeMatcher(N->getType(0)));
-  }
+  for (unsigned i = 0, e = ResultsToTypeCheck.size(); i != e; ++i)
+    AddMatcher(new CheckTypeMatcher(N->getType(ResultsToTypeCheck[i]),
+                                    ResultsToTypeCheck[i]));
 }
 
 /// EmitMatcherCode - Generate the code that matches the predicate of this

utils/TableGen/DAGISelMatcherOpt.cpp

@@ -48,8 +48,9 @@ static void ContractNodes(OwningPtr<Matcher> &MatcherPtr,
         New = new RecordChildMatcher(MC->getChildNo(), RM->getWhatFor(),
                                      RM->getResultNo());
     
-    if (CheckTypeMatcher *CT= dyn_cast<CheckTypeMatcher>(MC->getNext()))
-      if (MC->getChildNo() < 8)  // Only have CheckChildType0...7
+    if (CheckTypeMatcher *CT = dyn_cast<CheckTypeMatcher>(MC->getNext()))
+      if (MC->getChildNo() < 8 &&  // Only have CheckChildType0...7
+          CT->getResNo() == 0)     // CheckChildType checks res #0
         New = new CheckChildTypeMatcher(MC->getChildNo(), CT->getType());
     
     if (New) {
@@ -420,10 +421,12 @@ static void FactorNodes(OwningPtr<Matcher> &MatcherPtr) {
       CheckTypeMatcher *CTM =
         cast_or_null<CheckTypeMatcher>(FindNodeWithKind(NewOptionsToMatch[i],
                                                         Matcher::CheckType));
-      if (CTM == 0 || 
+      if (CTM == 0 ||
           // iPTR checks could alias any other case without us knowing, don't
           // bother with them.
           CTM->getType() == MVT::iPTR ||
+          // SwitchType only works for result #0.
+          CTM->getResNo() != 0 ||
           // If the CheckType isn't at the start of the list, see if we can move
           // it there.
           !CTM->canMoveBefore(NewOptionsToMatch[i])) {
@@ -488,7 +491,7 @@ static void FactorNodes(OwningPtr<Matcher> &MatcherPtr) {
       MatcherPtr.reset(new SwitchTypeMatcher(&Cases[0], Cases.size()));
     } else {
       // If we factored and ended up with one case, create it now.
-      MatcherPtr.reset(new CheckTypeMatcher(Cases[0].first));
+      MatcherPtr.reset(new CheckTypeMatcher(Cases[0].first, 0));
       MatcherPtr->setNext(Cases[0].second);
     }
     return;

utils/TableGen/FastISelEmitter.cpp

@@ -296,9 +296,11 @@ void FastISelMap::CollectPatterns(CodeGenDAGPatterns &CGP) {
     if (!InstPatNode) continue;
     if (InstPatNode->isLeaf()) continue;
 
+    // Ignore multiple result nodes for now.
+    if (InstPatNode->getNumTypes() > 1) continue;
+    
     Record *InstPatOp = InstPatNode->getOperator();
     std::string OpcodeName = getOpcodeName(InstPatOp, CGP);
-    assert(InstPatNode->getNumTypes() <= 1);
     MVT::SimpleValueType RetVT = MVT::isVoid;
     if (InstPatNode->getNumTypes()) RetVT = InstPatNode->getType(0);
     MVT::SimpleValueType VT = RetVT;