initial implementation of intrinsic parsing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26495 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenIntrinsics.h

@@ -0,0 +1,42 @@
+//===- CodeGenIntrinsic.h - Intrinsic Class Wrapper ------------*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines a wrapper class for the 'Intrinsic' TableGen class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_INTRINSIC_H
+#define CODEGEN_INTRINSIC_H
+
+#include <string>
+#include <vector>
+
+namespace llvm {
+  class Record;
+  class RecordKeeper;
+
+  struct CodeGenIntrinsic {
+    Record *TheDef;            // The actual record defining this instruction.
+    std::string Name;          // The name of the LLVM function "llvm.bswap.i32"
+    std::string EnumName;      // The name of the enum "bswap_i32"
+
+    // Memory mod/ref behavior of this intrinsic.
+    enum {
+      NoMem, ReadArgMem, ReadMem, WriteArgMem, WriteMem
+    } ModRef;
+
+    CodeGenIntrinsic(Record *R);
+  };
+
+  /// LoadIntrinsics - Read all of the intrinsics defined in the specified
+  /// .td file.
+  std::vector<CodeGenIntrinsic> LoadIntrinsics(const RecordKeeper &RC);
+}
+
+#endif

utils/TableGen/IntrinsicEmitter.cpp

@@ -0,0 +1,70 @@
+//===- IntrinsicEmitter.cpp - Generate intrinsic information --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits information about intrinsic functions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "IntrinsicEmitter.h"
+#include "Record.h"
+using namespace llvm;
+
+//===----------------------------------------------------------------------===//
+// CodeGenIntrinsic Implementation
+//===----------------------------------------------------------------------===//
+
+std::vector<CodeGenIntrinsic> llvm::LoadIntrinsics(const RecordKeeper &RC) {
+  std::vector<Record*> I = RC.getAllDerivedDefinitions("Intrinsic");
+  return std::vector<CodeGenIntrinsic>(I.begin(), I.end());
+}
+
+CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
+  std::string DefName = R->getName();
+  
+  if (DefName.size() <= 4 || 
+      std::string(DefName.begin(), DefName.begin()+4) != "int_")
+    throw "Intrinsic '" + DefName + "' does not start with 'int_'!";
+  EnumName = std::string(DefName.begin()+4, DefName.end());
+  
+  Name = R->getValueAsString("LLVMName");
+  if (Name == "") {
+    // If an explicit name isn't specified, derive one from the DefName.
+    Name = "llvm.";
+    for (unsigned i = 0, e = EnumName.size(); i != e; ++i)
+      if (EnumName[i] == '_')
+        Name += '.';
+      else
+        Name += EnumName[i];
+  }
+}
+
+//===----------------------------------------------------------------------===//
+// IntrinsicEmitter Implementation
+//===----------------------------------------------------------------------===//
+
+void IntrinsicEmitter::run(std::ostream &OS) {
+  EmitSourceFileHeader("Intrinsic Function Source Fragment", OS);
+  
+  std::vector<CodeGenIntrinsic> Ints = LoadIntrinsics(Records);
+
+  // Emit the enum information.
+  EmitEnumInfo(Ints, OS);
+}
+
+void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
+                                    std::ostream &OS) {
+  OS << "#ifdef GET_INTRINSIC_ENUM_VALUES\n";
+  for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+    OS << "    " << Ints[i].EnumName;
+    OS << ((i != e-1) ? ", " : "  ");
+    OS << std::string(40-Ints[i].EnumName.size(), ' ') 
+      << "// " << Ints[i].Name << "\n";
+  }
+  OS << "#endif\n\n";
+}

utils/TableGen/IntrinsicEmitter.h

@@ -0,0 +1,38 @@
+//===- IntrinsicEmitter.h - Generate intrinsic information ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Chris Lattner and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits information about intrinsic functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef INTRINSIC_EMITTER_H
+#define INTRINSIC_EMITTER_H
+
+#include "CodeGenIntrinsics.h"
+#include "TableGenBackend.h"
+
+namespace llvm {
+  class IntrinsicEmitter : public TableGenBackend {
+    RecordKeeper &Records;
+    
+  public:
+    IntrinsicEmitter(RecordKeeper &R) : Records(R) {}
+
+    void run(std::ostream &OS);
+    
+    void EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints, 
+                      std::ostream &OS);
+  };
+
+} // End llvm namespace
+
+#endif
+
+
+

utils/TableGen/TableGen.cpp

@@ -25,6 +25,7 @@
 #include "AsmWriterEmitter.h"
 #include "DAGISelEmitter.h"
 #include "SubtargetEmitter.h"
+#include "IntrinsicEmitter.h"
 #include <algorithm>
 #include <cstdio>
 #include <fstream>
@@ -38,6 +39,7 @@ enum ActionType {
   GenInstrEnums, GenInstrs, GenAsmWriter, 
   GenDAGISel,
   GenSubtarget,
+  GenIntrinsic,
   PrintEnums,
   Parse
 };
@@ -65,6 +67,8 @@ namespace {
                                "Generate a DAG instruction selector"),
                     clEnumValN(GenSubtarget, "gen-subtarget",
                                "Generate subtarget enumerations"),
+                    clEnumValN(GenIntrinsic, "gen-intrinsic",
+                               "Generate intrinsic information"),
                     clEnumValN(PrintEnums, "print-enums",
                                "Print enum values for a class"),
                     clEnumValN(Parse, "parse",
@@ -474,6 +478,9 @@ int main(int argc, char **argv) {
     case GenSubtarget:
       SubtargetEmitter(Records).run(*Out);
       break;
+    case GenIntrinsic:
+      IntrinsicEmitter(Records).run(*Out);
+      break;
     case PrintEnums:
     {
       std::vector<Record*> Recs = Records.getAllDerivedDefinitions(Class);