[mips] Define two subclasses of MipsDAGToDAGISel. Mips16DAGToDAGISel is for

mips16 and MipsSEDAGToDAGISel is for mips32/64. 

No functionality changes.

llvm-svn: 177089

1 files changed, 54 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.h b/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.h
new file mode 100644
index 00000000000..11bf0660f6b
--- /dev/null
+++ b/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.h
@@ -0,0 +1,54 @@
+//===-- MipsSEISelDAGToDAG.h - A Dag to Dag Inst Selector for MipsSE -----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Subclass of MipsDAGToDAGISel specialized for mips32/64.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef MIPSSEISELDAGTODAG_H
+#define MIPSSEISELDAGTODAG_H
+
+#include "MipsISelDAGToDAG.h"
+
+namespace llvm {
+
+class MipsSEDAGToDAGISel : public MipsDAGToDAGISel {
+
+public:
+  explicit MipsSEDAGToDAGISel(MipsTargetMachine &TM) : MipsDAGToDAGISel(TM) {}
+
+private:
+  bool ReplaceUsesWithZeroReg(MachineRegisterInfo *MRI, const MachineInstr&);
+
+  std::pair<SDNode*, SDNode*> SelectMULT(SDNode *N, unsigned Opc, DebugLoc dl,
+                                         EVT Ty, bool HasLo, bool HasHi);
+
+  virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
+                                SDValue &Offset) const;
+
+  virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
+                                 SDValue &Offset) const;
+
+  virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
+                             SDValue &Offset) const;
+
+  virtual std::pair<bool, SDNode*> SelectNode(SDNode *Node);
+
+  virtual void ProcessFunctionAfterISel(MachineFunction &MF);
+
+  // Insert instructions to initialize the global base register in the
+  // first MBB of the function.
+  void InitGlobalBaseReg(MachineFunction &MF);
+};
+
+FunctionPass *createMipsSEISelDag(MipsTargetMachine &TM);
+
+}
+
+#endif