initial implementation of intrinsic parsing

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

1 files changed, 70 insertions, 0 deletions

diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp
new file mode 100644
index 0000000000..dd4324ee11
--- /dev/null
+++ b/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";
+}