X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=utils%2FTableGen%2FDAGISelMatcherEmitter.cpp;h=4659dc157338b1459818f80dc4638516fde3782b;hb=00552e3875ee5f382db6c98286a241a7d0efe1b8;hp=1f0405038c6bd54d1e834e197d8bb42b474fa3f3;hpb=cfe2eab7446dedc471592fe702fefef783383171;p=oota-llvm.git

diff --git a/utils/TableGen/DAGISelMatcherEmitter.cpp b/utils/TableGen/DAGISelMatcherEmitter.cpp
index 1f0405038c6..4659dc15733 100644
--- a/utils/TableGen/DAGISelMatcherEmitter.cpp
+++ b/utils/TableGen/DAGISelMatcherEmitter.cpp
@@ -7,18 +7,18 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file contains code to generate C++ code a matcher.
+// This file contains code to generate C++ code for a matcher.
 //
 //===----------------------------------------------------------------------===//
 
 #include "DAGISelMatcher.h"
 #include "CodeGenDAGPatterns.h"
-#include "Record.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FormattedStream.h"
+#include "llvm/TableGen/Record.h"
 using namespace llvm;
 
 enum {
@@ -32,8 +32,13 @@ OmitComments("omit-comments", cl::desc("Do not generate comments"),
 
 namespace {
 class MatcherTableEmitter {
-  StringMap<unsigned> NodePredicateMap, PatternPredicateMap;
-  std::vector<std::string> NodePredicates, PatternPredicates;
+  const CodeGenDAGPatterns &CGP;
+  
+  DenseMap<TreePattern *, unsigned> NodePredicateMap;
+  std::vector<TreePredicateFn> NodePredicates;
+  
+  StringMap<unsigned> PatternPredicateMap;
+  std::vector<std::string> PatternPredicates;
 
   DenseMap<const ComplexPattern*, unsigned> ComplexPatternMap;
   std::vector<const ComplexPattern*> ComplexPatterns;
@@ -42,30 +47,29 @@ class MatcherTableEmitter {
   DenseMap<Record*, unsigned> NodeXFormMap;
   std::vector<Record*> NodeXForms;
 
-  // Per opcode frequence count. 
-  std::vector<unsigned> Histogram;
 public:
-  MatcherTableEmitter() {}
+  MatcherTableEmitter(const CodeGenDAGPatterns &cgp)
+    : CGP(cgp) {}
 
   unsigned EmitMatcherList(const Matcher *N, unsigned Indent,
                            unsigned StartIdx, formatted_raw_ostream &OS);
-  
-  void EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
-                              formatted_raw_ostream &OS);
-  
-  void EmitHistogram(formatted_raw_ostream &OS);
+
+  void EmitPredicateFunctions(formatted_raw_ostream &OS);
+
+  void EmitHistogram(const Matcher *N, formatted_raw_ostream &OS);
 private:
   unsigned EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
                        formatted_raw_ostream &OS);
-  
-  unsigned getNodePredicate(StringRef PredName) {
-    unsigned &Entry = NodePredicateMap[PredName];
+
+  unsigned getNodePredicate(TreePredicateFn Pred) {
+    unsigned &Entry = NodePredicateMap[Pred.getOrigPatFragRecord()];
     if (Entry == 0) {
-      NodePredicates.push_back(PredName.str());
+      NodePredicates.push_back(Pred);
       Entry = NodePredicates.size();
     }
     return Entry-1;
   }
+  
   unsigned getPatternPredicate(StringRef PredName) {
     unsigned &Entry = PatternPredicateMap[PredName];
     if (Entry == 0) {
@@ -74,7 +78,6 @@ private:
     }
     return Entry-1;
   }
-  
   unsigned getComplexPat(const ComplexPattern &P) {
     unsigned &Entry = ComplexPatternMap[&P];
     if (Entry == 0) {
@@ -83,7 +86,7 @@ private:
     }
     return Entry-1;
   }
-  
+
   unsigned getNodeXFormID(Record *Rec) {
     unsigned &Entry = NodeXFormMap[Rec];
     if (Entry == 0) {
@@ -92,13 +95,13 @@ private:
     }
     return Entry-1;
   }
-  
+
 };
 } // end anonymous namespace.
 
 static unsigned GetVBRSize(unsigned Val) {
   if (Val <= 127) return 1;
-  
+
   unsigned NumBytes = 0;
   while (Val >= 128) {
     Val >>= 7;
@@ -114,7 +117,7 @@ static uint64_t EmitVBRValue(uint64_t Val, raw_ostream &OS) {
     OS << Val << ", ";
     return 1;
   }
-  
+
   uint64_t InVal = Val;
   unsigned NumBytes = 0;
   while (Val >= 128) {
@@ -129,20 +132,20 @@ static uint64_t EmitVBRValue(uint64_t Val, raw_ostream &OS) {
   return NumBytes+1;
 }
 
-/// EmitMatcherOpcodes - Emit bytes for the specified matcher and return
+/// EmitMatcher - Emit bytes for the specified matcher and return
 /// the number of bytes emitted.
 unsigned MatcherTableEmitter::
 EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
             formatted_raw_ostream &OS) {
   OS.PadToColumn(Indent*2);
-  
+
   switch (N->getKind()) {
   case Matcher::Scope: {
     const ScopeMatcher *SM = cast<ScopeMatcher>(N);
-    assert(SM->getNext() == 0 && "Shouldn't have next after scope");
-    
+    assert(SM->getNext() == nullptr && "Shouldn't have next after scope");
+
     unsigned StartIdx = CurrentIdx;
-    
+
     // Emit all of the children.
     for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i) {
       if (i == 0) {
@@ -166,29 +169,29 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
       unsigned VBRSize = 0;
       do {
         VBRSize = GetVBRSize(ChildSize);
-        
+
         TmpBuf.clear();
         raw_svector_ostream OS(TmpBuf);
         formatted_raw_ostream FOS(OS);
         ChildSize = EmitMatcherList(SM->getChild(i), Indent+1,
                                     CurrentIdx+VBRSize, FOS);
       } while (GetVBRSize(ChildSize) != VBRSize);
-      
+
       assert(ChildSize != 0 && "Should not have a zero-sized child!");
-    
+
       CurrentIdx += EmitVBRValue(ChildSize, OS);
       if (!OmitComments) {
         OS << "/*->" << CurrentIdx+ChildSize << "*/";
-      
+
         if (i == 0)
           OS.PadToColumn(CommentIndent) << "// " << SM->getNumChildren()
             << " children in Scope";
       }
-      
-      OS << '\n' << TmpBuf.str();
+
+      OS << '\n' << TmpBuf;
       CurrentIdx += ChildSize;
     }
-    
+
     // Emit a zero as a sentinel indicating end of 'Scope'.
     if (!OmitComments)
       OS << "/*" << CurrentIdx << "*/";
@@ -198,7 +201,7 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     OS << '\n';
     return CurrentIdx - StartIdx + 1;
   }
-      
+
   case Matcher::RecordNode:
     OS << "OPC_RecordNode,";
     if (!OmitComments)
@@ -217,30 +220,36 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
         << cast<RecordChildMatcher>(N)->getWhatFor();
     OS << '\n';
     return 1;
-      
+
   case Matcher::RecordMemRef:
     OS << "OPC_RecordMemRef,\n";
     return 1;
-      
-  case Matcher::CaptureFlagInput:
-    OS << "OPC_CaptureFlagInput,\n";
+
+  case Matcher::CaptureGlueInput:
+    OS << "OPC_CaptureGlueInput,\n";
     return 1;
-      
+
   case Matcher::MoveChild:
     OS << "OPC_MoveChild, " << cast<MoveChildMatcher>(N)->getChildNo() << ",\n";
     return 2;
-      
+
   case Matcher::MoveParent:
     OS << "OPC_MoveParent,\n";
     return 1;
-      
+
   case Matcher::CheckSame:
     OS << "OPC_CheckSame, "
        << cast<CheckSameMatcher>(N)->getMatchNumber() << ",\n";
     return 2;
 
+  case Matcher::CheckChildSame:
+    OS << "OPC_CheckChild"
+       << cast<CheckChildSameMatcher>(N)->getChildNo() << "Same, "
+       << cast<CheckChildSameMatcher>(N)->getMatchNumber() << ",\n";
+    return 2;
+
   case Matcher::CheckPatternPredicate: {
-    StringRef Pred = cast<CheckPatternPredicateMatcher>(N)->getPredicate();
+    StringRef Pred =cast<CheckPatternPredicateMatcher>(N)->getPredicate();
     OS << "OPC_CheckPatternPredicate, " << getPatternPredicate(Pred) << ',';
     if (!OmitComments)
       OS.PadToColumn(CommentIndent) << "// " << Pred;
@@ -248,23 +257,23 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     return 2;
   }
   case Matcher::CheckPredicate: {
-    StringRef Pred = cast<CheckPredicateMatcher>(N)->getPredicateName();
+    TreePredicateFn Pred = cast<CheckPredicateMatcher>(N)->getPredicate();
     OS << "OPC_CheckPredicate, " << getNodePredicate(Pred) << ',';
     if (!OmitComments)
-      OS.PadToColumn(CommentIndent) << "// " << Pred;
+      OS.PadToColumn(CommentIndent) << "// " << Pred.getFnName();
     OS << '\n';
     return 2;
   }
 
   case Matcher::CheckOpcode:
-    OS << "OPC_CheckOpcode, "
-       << cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << ",\n";
-    return 2;
-      
+    OS << "OPC_CheckOpcode, TARGET_VAL("
+       << cast<CheckOpcodeMatcher>(N)->getOpcode().getEnumName() << "),\n";
+    return 3;
+
   case Matcher::SwitchOpcode:
   case Matcher::SwitchType: {
     unsigned StartIdx = CurrentIdx;
-    
+
     unsigned NumCases;
     if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
       OS << "OPC_SwitchOpcode ";
@@ -278,15 +287,19 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
       OS << "/*" << NumCases << " cases */";
     OS << ", ";
     ++CurrentIdx;
-    
+
     // For each case we emit the size, then the opcode, then the matcher.
     for (unsigned i = 0, e = NumCases; i != e; ++i) {
       const Matcher *Child;
-      if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
+      unsigned IdxSize;
+      if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N)) {
         Child = SOM->getCaseMatcher(i);
-      else
+        IdxSize = 2;  // size of opcode in table is 2 bytes.
+      } else {
         Child = cast<SwitchTypeMatcher>(N)->getCaseMatcher(i);
-      
+        IdxSize = 1;  // size of type in table is 1 byte.
+      }
+
       // We need to encode the opcode and the offset of the case code before
       // emitting the case code.  Handle this by buffering the output into a
       // string while we get the size.  Unfortunately, the offset of the
@@ -297,41 +310,45 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
       unsigned VBRSize = 0;
       do {
         VBRSize = GetVBRSize(ChildSize);
-        
+
         TmpBuf.clear();
         raw_svector_ostream OS(TmpBuf);
         formatted_raw_ostream FOS(OS);
-        ChildSize = EmitMatcherList(Child, Indent+1, CurrentIdx+VBRSize+1, FOS);
+        ChildSize = EmitMatcherList(Child, Indent+1, CurrentIdx+VBRSize+IdxSize,
+                                    FOS);
       } while (GetVBRSize(ChildSize) != VBRSize);
-      
+
       assert(ChildSize != 0 && "Should not have a zero-sized child!");
-      
+
       if (i != 0) {
+        if (!OmitComments)
+          OS << "/*" << CurrentIdx << "*/";
         OS.PadToColumn(Indent*2);
         if (!OmitComments)
-        OS << (isa<SwitchOpcodeMatcher>(N) ?
-                   "/*SwitchOpcode*/ " : "/*SwitchType*/ ");
+          OS << (isa<SwitchOpcodeMatcher>(N) ?
+                     "/*SwitchOpcode*/ " : "/*SwitchType*/ ");
       }
-      
+
       // Emit the VBR.
       CurrentIdx += EmitVBRValue(ChildSize, OS);
-      
-      OS << ' ';
+
       if (const SwitchOpcodeMatcher *SOM = dyn_cast<SwitchOpcodeMatcher>(N))
-        OS << SOM->getCaseOpcode(i).getEnumName();
+        OS << "TARGET_VAL(" << SOM->getCaseOpcode(i).getEnumName() << "),";
       else
-        OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i));
-      OS << ',';
-      
+        OS << getEnumName(cast<SwitchTypeMatcher>(N)->getCaseType(i)) << ',';
+
+      CurrentIdx += IdxSize;
+
       if (!OmitComments)
-        OS << "// ->" << CurrentIdx+ChildSize+1;
+        OS << "// ->" << CurrentIdx+ChildSize;
       OS << '\n';
-      ++CurrentIdx;
-      OS << TmpBuf.str();
+      OS << TmpBuf;
       CurrentIdx += ChildSize;
     }
 
     // Emit the final zero to terminate the switch.
+    if (!OmitComments)
+      OS << "/*" << CurrentIdx << "*/";
     OS.PadToColumn(Indent*2) << "0, ";
     if (!OmitComments)
       OS << (isa<SwitchOpcodeMatcher>(N) ?
@@ -343,46 +360,61 @@ 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;
-      
+
   case Matcher::CheckChildType:
     OS << "OPC_CheckChild"
        << cast<CheckChildTypeMatcher>(N)->getChildNo() << "Type, "
        << getEnumName(cast<CheckChildTypeMatcher>(N)->getType()) << ",\n";
     return 2;
-      
+
   case Matcher::CheckInteger: {
     OS << "OPC_CheckInteger, ";
     unsigned Bytes=1+EmitVBRValue(cast<CheckIntegerMatcher>(N)->getValue(), OS);
     OS << '\n';
     return Bytes;
   }
+  case Matcher::CheckChildInteger: {
+    OS << "OPC_CheckChild" << cast<CheckChildIntegerMatcher>(N)->getChildNo()
+       << "Integer, ";
+    unsigned Bytes=1+EmitVBRValue(cast<CheckChildIntegerMatcher>(N)->getValue(),
+                                  OS);
+    OS << '\n';
+    return Bytes;
+  }
   case Matcher::CheckCondCode:
     OS << "OPC_CheckCondCode, ISD::"
        << cast<CheckCondCodeMatcher>(N)->getCondCodeName() << ",\n";
     return 2;
-      
+
   case Matcher::CheckValueType:
     OS << "OPC_CheckValueType, MVT::"
        << cast<CheckValueTypeMatcher>(N)->getTypeName() << ",\n";
     return 2;
 
   case Matcher::CheckComplexPat: {
-    const ComplexPattern &Pattern =
-      cast<CheckComplexPatMatcher>(N)->getPattern();
-    OS << "OPC_CheckComplexPat, " << getComplexPat(Pattern) << ',';
+    const CheckComplexPatMatcher *CCPM = cast<CheckComplexPatMatcher>(N);
+    const ComplexPattern &Pattern = CCPM->getPattern();
+    OS << "OPC_CheckComplexPat, /*CP*/" << getComplexPat(Pattern) << ", /*#*/"
+       << CCPM->getMatchNumber() << ',';
+
     if (!OmitComments) {
       OS.PadToColumn(CommentIndent) << "// " << Pattern.getSelectFunc();
-      OS << ": " << Pattern.getNumOperands() << " operands";
+      OS << ":$" << CCPM->getName();
+      for (unsigned i = 0, e = Pattern.getNumOperands(); i != e; ++i)
+        OS << " #" << CCPM->getFirstResult()+i;
+
       if (Pattern.hasProperty(SDNPHasChain))
-        OS << " + chain result and input";
+        OS << " + chain result";
     }
     OS << '\n';
-    return 2;
+    return 3;
   }
-      
+
   case Matcher::CheckAndImm: {
     OS << "OPC_CheckAndImm, ";
     unsigned Bytes=1+EmitVBRValue(cast<CheckAndImmMatcher>(N)->getValue(), OS);
@@ -396,11 +428,11 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     OS << '\n';
     return Bytes;
   }
-      
+
   case Matcher::CheckFoldableChainNode:
     OS << "OPC_CheckFoldableChainNode,\n";
     return 1;
-      
+
   case Matcher::EmitInteger: {
     int64_t Val = cast<EmitIntegerMatcher>(N)->getValue();
     OS << "OPC_EmitInteger, "
@@ -417,28 +449,45 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
       << Val << ",\n";
     return 3;
   }
-      
-  case Matcher::EmitRegister:
-    OS << "OPC_EmitRegister, "
-       << getEnumName(cast<EmitRegisterMatcher>(N)->getVT()) << ", ";
-    if (Record *R = cast<EmitRegisterMatcher>(N)->getReg())
-      OS << getQualifiedName(R) << ",\n";
-    else {
-      OS << "0 ";
-      if (!OmitComments)
-        OS << "/*zero_reg*/";
-      OS << ",\n";
+
+  case Matcher::EmitRegister: {
+    const EmitRegisterMatcher *Matcher = cast<EmitRegisterMatcher>(N);
+    const CodeGenRegister *Reg = Matcher->getReg();
+    // If the enum value of the register is larger than one byte can handle,
+    // use EmitRegister2.
+    if (Reg && Reg->EnumValue > 255) {
+      OS << "OPC_EmitRegister2, " << getEnumName(Matcher->getVT()) << ", ";
+      OS << "TARGET_VAL(" << getQualifiedName(Reg->TheDef) << "),\n";
+      return 4;
+    } else {
+      OS << "OPC_EmitRegister, " << getEnumName(Matcher->getVT()) << ", ";
+      if (Reg) {
+        OS << getQualifiedName(Reg->TheDef) << ",\n";
+      } else {
+        OS << "0 ";
+        if (!OmitComments)
+          OS << "/*zero_reg*/";
+        OS << ",\n";
+      }
+      return 3;
     }
-    return 3;
-      
+  }
+
   case Matcher::EmitConvertToTarget:
     OS << "OPC_EmitConvertToTarget, "
        << cast<EmitConvertToTargetMatcher>(N)->getSlot() << ",\n";
     return 2;
-      
+
   case Matcher::EmitMergeInputChains: {
     const EmitMergeInputChainsMatcher *MN =
       cast<EmitMergeInputChainsMatcher>(N);
+
+    // Handle the specialized forms OPC_EmitMergeInputChains1_0 and 1_1.
+    if (MN->getNumNodes() == 1 && MN->getNode(0) < 2) {
+      OS << "OPC_EmitMergeInputChains1_" << MN->getNode(0) << ",\n";
+      return 1;
+    }
+
     OS << "OPC_EmitMergeInputChains, " << MN->getNumNodes() << ", ";
     for (unsigned i = 0, e = MN->getNumNodes(); i != e; ++i)
       OS << MN->getNode(i) << ", ";
@@ -460,21 +509,21 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     OS <<'\n';
     return 3;
   }
-      
+
   case Matcher::EmitNode:
   case Matcher::MorphNodeTo: {
     const EmitNodeMatcherCommon *EN = cast<EmitNodeMatcherCommon>(N);
     OS << (isa<EmitNodeMatcher>(EN) ? "OPC_EmitNode" : "OPC_MorphNodeTo");
-    OS << ", TARGET_OPCODE(" << EN->getOpcodeName() << "), 0";
-    
+    OS << ", TARGET_VAL(" << EN->getOpcodeName() << "), 0";
+
     if (EN->hasChain())   OS << "|OPFL_Chain";
-    if (EN->hasInFlag())  OS << "|OPFL_FlagInput";
-    if (EN->hasOutFlag()) OS << "|OPFL_FlagOutput";
+    if (EN->hasInFlag())  OS << "|OPFL_GlueInput";
+    if (EN->hasOutFlag()) OS << "|OPFL_GlueOutput";
     if (EN->hasMemRefs()) OS << "|OPFL_MemRefs";
     if (EN->getNumFixedArityOperands() != -1)
       OS << "|OPFL_Variadic" << EN->getNumFixedArityOperands();
     OS << ",\n";
-    
+
     OS.PadToColumn(Indent*2+4) << EN->getNumVTs();
     if (!OmitComments)
       OS << "/*#VTs*/";
@@ -489,33 +538,34 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     unsigned NumOperandBytes = 0;
     for (unsigned i = 0, e = EN->getNumOperands(); i != e; ++i)
       NumOperandBytes += EmitVBRValue(EN->getOperand(i), OS);
-    
+
     if (!OmitComments) {
       // Print the result #'s for EmitNode.
       if (const EmitNodeMatcher *E = dyn_cast<EmitNodeMatcher>(EN)) {
         if (unsigned NumResults = EN->getNumVTs()) {
-          OS.PadToColumn(CommentIndent) << "// Results = ";
+          OS.PadToColumn(CommentIndent) << "// Results =";
           unsigned First = E->getFirstResultSlot();
           for (unsigned i = 0; i != NumResults; ++i)
-            OS << "#" << First+i << " ";
+            OS << " #" << First+i;
         }
       }
       OS << '\n';
 
       if (const MorphNodeToMatcher *SNT = dyn_cast<MorphNodeToMatcher>(N)) {
         OS.PadToColumn(Indent*2) << "// Src: "
-          << *SNT->getPattern().getSrcPattern() << '\n';
+          << *SNT->getPattern().getSrcPattern() << " - Complexity = "
+          << SNT->getPattern().getPatternComplexity(CGP) << '\n';
         OS.PadToColumn(Indent*2) << "// Dst: "
           << *SNT->getPattern().getDstPattern() << '\n';
       }
     } else
       OS << '\n';
-    
+
     return 6+EN->getNumVTs()+NumOperandBytes;
   }
-  case Matcher::MarkFlagResults: {
-    const MarkFlagResultsMatcher *CFR = cast<MarkFlagResultsMatcher>(N);
-    OS << "OPC_MarkFlagResults, " << CFR->getNumNodes() << ", ";
+  case Matcher::MarkGlueResults: {
+    const MarkGlueResultsMatcher *CFR = cast<MarkGlueResultsMatcher>(N);
+    OS << "OPC_MarkGlueResults, " << CFR->getNumNodes() << ", ";
     unsigned NumOperandBytes = 0;
     for (unsigned i = 0, e = CFR->getNumNodes(); i != e; ++i)
       NumOperandBytes += EmitVBRValue(CFR->getNode(i), OS);
@@ -531,7 +581,8 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     OS << '\n';
     if (!OmitComments) {
       OS.PadToColumn(Indent*2) << "// Src: "
-        << *CM->getPattern().getSrcPattern() << '\n';
+        << *CM->getPattern().getSrcPattern() << " - Complexity = "
+        << CM->getPattern().getPatternComplexity(CGP) << '\n';
       OS.PadToColumn(Indent*2) << "// Dst: "
         << *CM->getPattern().getDstPattern();
     }
@@ -539,8 +590,7 @@ EmitMatcher(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
     return 2 + NumResultBytes;
   }
   }
-  assert(0 && "Unreachable");
-  return 0;
+  llvm_unreachable("Unreachable");
 }
 
 /// EmitMatcherList - Emit the bytes for the specified matcher subtree.
@@ -549,15 +599,12 @@ EmitMatcherList(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
                 formatted_raw_ostream &OS) {
   unsigned Size = 0;
   while (N) {
-    if (unsigned(N->getKind()) >= Histogram.size())
-      Histogram.resize(N->getKind()+1);
-    Histogram[N->getKind()]++;
     if (!OmitComments)
       OS << "/*" << CurrentIdx << "*/";
     unsigned MatcherSize = EmitMatcher(N, Indent, CurrentIdx, OS);
     Size += MatcherSize;
     CurrentIdx += MatcherSize;
-    
+
     // If there are other nodes in this list, iterate to them, otherwise we're
     // done.
     N = N->getNext();
@@ -565,104 +612,105 @@ EmitMatcherList(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
   return Size;
 }
 
-void MatcherTableEmitter::EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
-                                                 formatted_raw_ostream &OS) {
+void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
   // Emit pattern predicates.
   if (!PatternPredicates.empty()) {
-    OS << "bool CheckPatternPredicate(unsigned PredNo) const {\n";
+    OS << "bool CheckPatternPredicate(unsigned PredNo) const override {\n";
     OS << "  switch (PredNo) {\n";
-    OS << "  default: assert(0 && \"Invalid predicate in table?\");\n";
+    OS << "  default: llvm_unreachable(\"Invalid predicate in table?\");\n";
     for (unsigned i = 0, e = PatternPredicates.size(); i != e; ++i)
       OS << "  case " << i << ": return "  << PatternPredicates[i] << ";\n";
     OS << "  }\n";
     OS << "}\n\n";
   }
-   
+
   // Emit Node predicates.
   // FIXME: Annoyingly, these are stored by name, which we never even emit. Yay?
   StringMap<TreePattern*> PFsByName;
-  
+
   for (CodeGenDAGPatterns::pf_iterator I = CGP.pf_begin(), E = CGP.pf_end();
        I != E; ++I)
-    PFsByName[I->first->getName()] = I->second;
-  
+    PFsByName[I->first->getName()] = I->second.get();
+
   if (!NodePredicates.empty()) {
-    OS << "bool CheckNodePredicate(SDNode *Node, unsigned PredNo) const {\n";
+    OS << "bool CheckNodePredicate(SDNode *Node,\n";
+    OS << "                        unsigned PredNo) const override {\n";
     OS << "  switch (PredNo) {\n";
-    OS << "  default: assert(0 && \"Invalid predicate in table?\");\n";
+    OS << "  default: llvm_unreachable(\"Invalid predicate in table?\");\n";
     for (unsigned i = 0, e = NodePredicates.size(); i != e; ++i) {
-      // FIXME: Storing this by name is horrible.
-      TreePattern *P =PFsByName[NodePredicates[i].substr(strlen("Predicate_"))];
-      assert(P && "Unknown name?");
-      
       // Emit the predicate code corresponding to this pattern.
-      std::string Code = P->getRecord()->getValueAsCode("Predicate");
-      assert(!Code.empty() && "No code in this predicate");
-      OS << "  case " << i << ": { // " << NodePredicates[i] << '\n';
-      std::string ClassName;
-      if (P->getOnlyTree()->isLeaf())
-        ClassName = "SDNode";
-      else
-        ClassName =
-          CGP.getSDNodeInfo(P->getOnlyTree()->getOperator()).getSDClassName();
-      if (ClassName == "SDNode")
-        OS << "    SDNode *N = Node;\n";
-      else
-        OS << "    " << ClassName << "*N = cast<" << ClassName << ">(Node);\n";
-      OS << Code << "\n  }\n";
+      TreePredicateFn PredFn = NodePredicates[i];
+      
+      assert(!PredFn.isAlwaysTrue() && "No code in this predicate");
+      OS << "  case " << i << ": { // " << NodePredicates[i].getFnName() <<'\n';
+      
+      OS << PredFn.getCodeToRunOnSDNode() << "\n  }\n";
     }
     OS << "  }\n";
     OS << "}\n\n";
   }
-  
+
   // Emit CompletePattern matchers.
   // FIXME: This should be const.
   if (!ComplexPatterns.empty()) {
-    OS << "bool CheckComplexPattern(SDNode *Root, SDValue N,\n";
-    OS << "      unsigned PatternNo, SmallVectorImpl<SDValue> &Result) {\n";
+    OS << "bool CheckComplexPattern(SDNode *Root, SDNode *Parent,\n";
+    OS << "                         SDValue N, unsigned PatternNo,\n";
+    OS << "         SmallVectorImpl<std::pair<SDValue, SDNode*> > &Result) override {\n";
+    OS << "  unsigned NextRes = Result.size();\n";
     OS << "  switch (PatternNo) {\n";
-    OS << "  default: assert(0 && \"Invalid pattern # in table?\");\n";
+    OS << "  default: llvm_unreachable(\"Invalid pattern # in table?\");\n";
     for (unsigned i = 0, e = ComplexPatterns.size(); i != e; ++i) {
       const ComplexPattern &P = *ComplexPatterns[i];
       unsigned NumOps = P.getNumOperands();
 
       if (P.hasProperty(SDNPHasChain))
         ++NumOps;  // Get the chained node too.
-      
+
       OS << "  case " << i << ":\n";
-      OS << "    Result.resize(Result.size()+" << NumOps << ");\n";
+      OS << "    Result.resize(NextRes+" << NumOps << ");\n";
       OS << "    return "  << P.getSelectFunc();
 
-      OS << "(Root, N";
+      OS << "(";
+      // If the complex pattern wants the root of the match, pass it in as the
+      // first argument.
+      if (P.hasProperty(SDNPWantRoot))
+        OS << "Root, ";
+
+      // If the complex pattern wants the parent of the operand being matched,
+      // pass it in as the next argument.
+      if (P.hasProperty(SDNPWantParent))
+        OS << "Parent, ";
+
+      OS << "N";
       for (unsigned i = 0; i != NumOps; ++i)
-        OS << ", Result[Result.size()-" << (NumOps-i) << ']';
+        OS << ", Result[NextRes+" << i << "].first";
       OS << ");\n";
     }
     OS << "  }\n";
     OS << "}\n\n";
   }
-  
-  
+
+
   // Emit SDNodeXForm handlers.
   // FIXME: This should be const.
   if (!NodeXForms.empty()) {
-    OS << "SDValue RunSDNodeXForm(SDValue V, unsigned XFormNo) {\n";
+    OS << "SDValue RunSDNodeXForm(SDValue V, unsigned XFormNo) override {\n";
     OS << "  switch (XFormNo) {\n";
-    OS << "  default: assert(0 && \"Invalid xform # in table?\");\n";
-    
+    OS << "  default: llvm_unreachable(\"Invalid xform # in table?\");\n";
+
     // FIXME: The node xform could take SDValue's instead of SDNode*'s.
     for (unsigned i = 0, e = NodeXForms.size(); i != e; ++i) {
       const CodeGenDAGPatterns::NodeXForm &Entry =
         CGP.getSDNodeTransform(NodeXForms[i]);
-      
+
       Record *SDNode = Entry.first;
       const std::string &Code = Entry.second;
-      
+
       OS << "  case " << i << ": {  ";
       if (!OmitComments)
         OS << "// " << NodeXForms[i]->getName();
       OS << '\n';
-      
+
       std::string ClassName = CGP.getSDNodeInfo(SDNode).getSDClassName();
       if (ClassName == "SDNode")
         OS << "    SDNode *N = V.getNode();\n";
@@ -676,21 +724,49 @@ void MatcherTableEmitter::EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
   }
 }
 
-void MatcherTableEmitter::EmitHistogram(formatted_raw_ostream &OS) {
+static void BuildHistogram(const Matcher *M, std::vector<unsigned> &OpcodeFreq){
+  for (; M != nullptr; M = M->getNext()) {
+    // Count this node.
+    if (unsigned(M->getKind()) >= OpcodeFreq.size())
+      OpcodeFreq.resize(M->getKind()+1);
+    OpcodeFreq[M->getKind()]++;
+
+    // Handle recursive nodes.
+    if (const ScopeMatcher *SM = dyn_cast<ScopeMatcher>(M)) {
+      for (unsigned i = 0, e = SM->getNumChildren(); i != e; ++i)
+        BuildHistogram(SM->getChild(i), OpcodeFreq);
+    } else if (const SwitchOpcodeMatcher *SOM =
+                 dyn_cast<SwitchOpcodeMatcher>(M)) {
+      for (unsigned i = 0, e = SOM->getNumCases(); i != e; ++i)
+        BuildHistogram(SOM->getCaseMatcher(i), OpcodeFreq);
+    } else if (const SwitchTypeMatcher *STM = dyn_cast<SwitchTypeMatcher>(M)) {
+      for (unsigned i = 0, e = STM->getNumCases(); i != e; ++i)
+        BuildHistogram(STM->getCaseMatcher(i), OpcodeFreq);
+    }
+  }
+}
+
+void MatcherTableEmitter::EmitHistogram(const Matcher *M,
+                                        formatted_raw_ostream &OS) {
   if (OmitComments)
     return;
+
+  std::vector<unsigned> OpcodeFreq;
+  BuildHistogram(M, OpcodeFreq);
+
   OS << "  // Opcode Histogram:\n";
-  for (unsigned i = 0, e = Histogram.size(); i != e; ++i) {
+  for (unsigned i = 0, e = OpcodeFreq.size(); i != e; ++i) {
     OS << "  // #";
     switch ((Matcher::KindTy)i) {
-    case Matcher::Scope: OS << "OPC_Scope"; break; 
-    case Matcher::RecordNode: OS << "OPC_RecordNode"; break; 
+    case Matcher::Scope: OS << "OPC_Scope"; break;
+    case Matcher::RecordNode: OS << "OPC_RecordNode"; break;
     case Matcher::RecordChild: OS << "OPC_RecordChild"; break;
     case Matcher::RecordMemRef: OS << "OPC_RecordMemRef"; break;
-    case Matcher::CaptureFlagInput: OS << "OPC_CaptureFlagInput"; break;
+    case Matcher::CaptureGlueInput: OS << "OPC_CaptureGlueInput"; break;
     case Matcher::MoveChild: OS << "OPC_MoveChild"; break;
     case Matcher::MoveParent: OS << "OPC_MoveParent"; break;
     case Matcher::CheckSame: OS << "OPC_CheckSame"; break;
+    case Matcher::CheckChildSame: OS << "OPC_CheckChildSame"; break;
     case Matcher::CheckPatternPredicate:
       OS << "OPC_CheckPatternPredicate"; break;
     case Matcher::CheckPredicate: OS << "OPC_CheckPredicate"; break;
@@ -700,6 +776,7 @@ void MatcherTableEmitter::EmitHistogram(formatted_raw_ostream &OS) {
     case Matcher::SwitchType: OS << "OPC_SwitchType"; break;
     case Matcher::CheckChildType: OS << "OPC_CheckChildType"; break;
     case Matcher::CheckInteger: OS << "OPC_CheckInteger"; break;
+    case Matcher::CheckChildInteger: OS << "OPC_CheckChildInteger"; break;
     case Matcher::CheckCondCode: OS << "OPC_CheckCondCode"; break;
     case Matcher::CheckValueType: OS << "OPC_CheckValueType"; break;
     case Matcher::CheckComplexPat: OS << "OPC_CheckComplexPat"; break;
@@ -716,37 +793,39 @@ void MatcherTableEmitter::EmitHistogram(formatted_raw_ostream &OS) {
     case Matcher::EmitNode: OS << "OPC_EmitNode"; break;
     case Matcher::MorphNodeTo: OS << "OPC_MorphNodeTo"; break;
     case Matcher::EmitNodeXForm: OS << "OPC_EmitNodeXForm"; break;
-    case Matcher::MarkFlagResults: OS << "OPC_MarkFlagResults"; break;
-    case Matcher::CompleteMatch: OS << "OPC_CompleteMatch"; break;    
+    case Matcher::MarkGlueResults: OS << "OPC_MarkGlueResults"; break;
+    case Matcher::CompleteMatch: OS << "OPC_CompleteMatch"; break;
     }
-    
-    OS.PadToColumn(40) << " = " << Histogram[i] << '\n';
+
+    OS.PadToColumn(40) << " = " << OpcodeFreq[i] << '\n';
   }
   OS << '\n';
 }
 
 
 void llvm::EmitMatcherTable(const Matcher *TheMatcher,
-                            const CodeGenDAGPatterns &CGP, raw_ostream &O) {
+                            const CodeGenDAGPatterns &CGP,
+                            raw_ostream &O) {
   formatted_raw_ostream OS(O);
-  
+
   OS << "// The main instruction selector code.\n";
   OS << "SDNode *SelectCode(SDNode *N) {\n";
 
-  MatcherTableEmitter MatcherEmitter;
+  MatcherTableEmitter MatcherEmitter(CGP);
 
-  OS << "  // Opcodes are emitted as 2 bytes, TARGET_OPCODE handles this.\n";
-  OS << "  #define TARGET_OPCODE(X) X & 255, unsigned(X) >> 8\n";
+  OS << "  // Some target values are emitted as 2 bytes, TARGET_VAL handles\n";
+  OS << "  // this.\n";
+  OS << "  #define TARGET_VAL(X) X & 255, unsigned(X) >> 8\n";
   OS << "  static const unsigned char MatcherTable[] = {\n";
-  unsigned TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 5, 0, OS);
+  unsigned TotalSize = MatcherEmitter.EmitMatcherList(TheMatcher, 6, 0, OS);
   OS << "    0\n  }; // Total Array size is " << (TotalSize+1) << " bytes\n\n";
-  
-  MatcherEmitter.EmitHistogram(OS);
-  
-  OS << "  #undef TARGET_OPCODE\n";
+
+  MatcherEmitter.EmitHistogram(TheMatcher, OS);
+
+  OS << "  #undef TARGET_VAL\n";
   OS << "  return SelectCodeCommon(N, MatcherTable,sizeof(MatcherTable));\n}\n";
   OS << '\n';
-  
+
   // Next up, emit the function for node and pattern predicates:
-  MatcherEmitter.EmitPredicateFunctions(CGP, OS);
+  MatcherEmitter.EmitPredicateFunctions(OS);
 }