1 files changed, 59 insertions, 0 deletions
diff --git a/lib/Target/PIC16/PIC16ISelDAGToDAG.cpp b/lib/Target/PIC16/PIC16ISelDAGToDAG.cpp
new file mode 100644
index 0000000000000..6c2b8ec9747a8
--- /dev/null
+++ b/lib/Target/PIC16/PIC16ISelDAGToDAG.cpp
@@ -0,0 +1,59 @@
+//===-- PIC16ISelDAGToDAG.cpp - A dag to dag inst selector for PIC16 ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source 
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines an instruction selector for the PIC16 target.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "pic16-isel"
+
+#include "PIC16ISelDAGToDAG.h"
+#include "llvm/Support/Debug.h"
+
+using namespace llvm;
+
+/// createPIC16ISelDag - This pass converts a legalized DAG into a
+/// PIC16-specific DAG, ready for instruction scheduling.
+FunctionPass *llvm::createPIC16ISelDag(PIC16TargetMachine &TM) {
+  return new PIC16DAGToDAGISel(TM);
+}
+
+
+/// InstructionSelect - This callback is invoked by
+/// SelectionDAGISel when it has created a SelectionDAG for us to codegen.
+void PIC16DAGToDAGISel::InstructionSelect() {
+  DEBUG(BB->dump());
+  SelectRoot(*CurDAG);
+  CurDAG->RemoveDeadNodes();
+}
+
+/// Select - Select instructions not customized! Used for
+/// expanded, promoted and normal instructions.
+SDNode* PIC16DAGToDAGISel::Select(SDValue N) {
+
+  // Select the default instruction.
+  SDNode *ResNode = SelectCode(N);
+
+  return ResNode;
+}
+
+
+// SelectDirectAddr - Match a direct address for DAG. 
+// A direct address could be a globaladdress or externalsymbol.
+bool PIC16DAGToDAGISel::SelectDirectAddr(SDValue Op, SDValue N, 
+                                      SDValue &Address) {
+  // Return true if TGA or ES.
+  if (N.getOpcode() == ISD::TargetGlobalAddress
+      || N.getOpcode() == ISD::TargetExternalSymbol) {
+    Address = N;
+    return true;
+  }
+
+  return false;
+}