inline the node transforms and node predicates into the generated

dispatcher method.  This eliminates the dependence of the new isel's
generated code on the old isel's predicates, however some random
hand written isel code still uses them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97431 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/DAGISelEmitter.cpp

@@ -1933,17 +1933,18 @@ void DAGISelEmitter::run(raw_ostream &OS) {
      << "// by the instruction selector.\n";
   OS << "#include \"llvm/CodeGen/DAGISelHeader.h\"\n\n";
   
+  DEBUG(errs() << "\n\nALL PATTERNS TO MATCH:\n\n";
+        for (CodeGenDAGPatterns::ptm_iterator I = CGP.ptm_begin(),
+             E = CGP.ptm_end(); I != E; ++I) {
+          errs() << "PATTERN: ";   I->getSrcPattern()->dump();
+          errs() << "\nRESULT:  "; I->getDstPattern()->dump();
+          errs() << "\n";
+        });
+
+  // FIXME: These are being used by hand written code, gross.
   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");
-  }
-  
+
 #ifdef ENABLE_NEW_ISEL
   // Add all the patterns to a temporary list so we can sort them.
   std::vector<const PatternToMatch*> Patterns;
@@ -1968,10 +1969,11 @@ void DAGISelEmitter::run(raw_ostream &OS) {
 
   TheMatcher = OptimizeMatcher(TheMatcher, CGP);
   //Matcher->dump();
-  EmitMatcherTable(TheMatcher, OS);
+  EmitMatcherTable(TheMatcher, CGP, OS);
   delete TheMatcher;
   
 #else
+  
   // 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.

utils/TableGen/DAGISelMatcher.h

@@ -28,7 +28,8 @@ namespace llvm {
 Matcher *ConvertPatternToMatcher(const PatternToMatch &Pattern,
                                  const CodeGenDAGPatterns &CGP);
 Matcher *OptimizeMatcher(Matcher *Matcher, const CodeGenDAGPatterns &CGP);
-void EmitMatcherTable(const Matcher *Matcher, raw_ostream &OS);
+void EmitMatcherTable(const Matcher *Matcher, const CodeGenDAGPatterns &CGP,
+                      raw_ostream &OS);
 
   
 /// Matcher - Base class for all the the DAG ISel Matcher representation

utils/TableGen/DAGISelMatcherEmitter.cpp

@@ -34,7 +34,7 @@ class MatcherTableEmitter {
 
 
   DenseMap<Record*, unsigned> NodeXFormMap;
-  std::vector<const Record*> NodeXForms;
+  std::vector<Record*> NodeXForms;
 
   // Per opcode frequence count. 
   std::vector<unsigned> Histogram;
@@ -44,7 +44,8 @@ public:
   unsigned EmitMatcherList(const Matcher *N, unsigned Indent,
                            unsigned StartIdx, formatted_raw_ostream &OS);
   
-  void EmitPredicateFunctions(formatted_raw_ostream &OS);
+  void EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
+                              formatted_raw_ostream &OS);
   
   void EmitHistogram(formatted_raw_ostream &OS);
 private:
@@ -440,7 +441,8 @@ EmitMatcherList(const Matcher *N, unsigned Indent, unsigned CurrentIdx,
   return Size;
 }
 
-void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
+void MatcherTableEmitter::EmitPredicateFunctions(const CodeGenDAGPatterns &CGP,
+                                                 formatted_raw_ostream &OS) {
   // FIXME: Don't build off the DAGISelEmitter's predicates, emit them directly
   // here into the case stmts.
   
@@ -454,15 +456,40 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
     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;
+  
   if (!NodePredicates.empty()) {
-    OS << "bool CheckNodePredicate(SDNode *N, unsigned PredNo) const {\n";
+    OS << "bool CheckNodePredicate(SDNode *Node, unsigned PredNo) const {\n";
     OS << "  switch (PredNo) {\n";
     OS << "  default: assert(0 && \"Invalid predicate in table?\");\n";
-    for (unsigned i = 0, e = NodePredicates.size(); i != e; ++i)
-      OS << "  case " << i << ": return "  << NodePredicates[i] << "(N);\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";
+    }
     OS << "  }\n";
     OS << "}\n\n";
   }
@@ -498,6 +525,7 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
     OS << "}\n\n";
   }
   
+  
   // Emit SDNodeXForm handlers.
   // FIXME: This should be const.
   if (!NodeXForms.empty()) {
@@ -506,9 +534,23 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
     OS << "  default: assert(0 && \"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)
-      OS << "  case " << i << ": return Transform_" << NodeXForms[i]->getName()
-         << "(V.getNode());\n";
+    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 << ": {  // " << NodeXForms[i]->getName() << '\n';
+      
+      std::string ClassName = CGP.getSDNodeInfo(SDNode).getSDClassName();
+      if (ClassName == "SDNode")
+        OS << "    SDNode *N = V.getNode();\n";
+      else
+        OS << "    " << ClassName << " *N = cast<" << ClassName
+           << ">(V.getNode());\n";
+      OS << Code << "\n  }\n";
+    }
     OS << "  }\n";
     OS << "}\n\n";
   }
@@ -562,7 +604,8 @@ void MatcherTableEmitter::EmitHistogram(formatted_raw_ostream &OS) {
 }
 
 
-void llvm::EmitMatcherTable(const Matcher *TheMatcher, raw_ostream &O) {
+void llvm::EmitMatcherTable(const Matcher *TheMatcher,
+                            const CodeGenDAGPatterns &CGP, raw_ostream &O) {
   formatted_raw_ostream OS(O);
   
   OS << "// The main instruction selector code.\n";
@@ -583,5 +626,5 @@ void llvm::EmitMatcherTable(const Matcher *TheMatcher, raw_ostream &O) {
   OS << "\n";
   
   // Next up, emit the function for node and pattern predicates:
-  MatcherEmitter.EmitPredicateFunctions(OS);
+  MatcherEmitter.EmitPredicateFunctions(CGP, OS);
 }

utils/TableGen/DAGISelMatcherGen.cpp

@@ -829,7 +829,7 @@ void MatcherGen::EmitResultCode() {
   // that tells the matcher about them so that it can update their results.
   if (!MatchedFlagResultNodes.empty())
     AddMatcher(new MarkFlagResultsMatcher(MatchedFlagResultNodes.data(),
-                                                MatchedFlagResultNodes.size()));
+                                          MatchedFlagResultNodes.size()));
   
   
   // We know that the resulting pattern has exactly one result/