[AVR] Add a majority of the backend code

Summary: This adds the majority of the AVR backend.

Reviewers: hfinkel, dsanders, vkalintiris, arsenm

Subscribers: dylanmckay

Differential Revision: http://reviews.llvm.org/D17906

llvm-svn: 268722

1 files changed, 56 insertions, 0 deletions

diff --git a/llvm/lib/Target/AVR/AVRRegisterInfo.h b/llvm/lib/Target/AVR/AVRRegisterInfo.h
new file mode 100644
index 00000000000..59c0849d209
--- /dev/null
+++ b/llvm/lib/Target/AVR/AVRRegisterInfo.h
@@ -0,0 +1,56 @@
+//===-- AVRRegisterInfo.h - AVR Register Information Impl -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the AVR implementation of the TargetRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_AVR_REGISTER_INFO_H
+#define LLVM_AVR_REGISTER_INFO_H
+
+#include "llvm/Target/TargetRegisterInfo.h"
+
+#define GET_REGINFO_HEADER
+#include "AVRGenRegisterInfo.inc"
+
+namespace llvm {
+
+/// Utilities relating to AVR registers.
+class AVRRegisterInfo : public AVRGenRegisterInfo {
+public:
+  AVRRegisterInfo();
+
+public:
+  const uint16_t *
+  getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
+  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
+                                       CallingConv::ID CC) const override;
+  BitVector getReservedRegs(const MachineFunction &MF) const override;
+
+  const TargetRegisterClass *
+  getLargestLegalSuperClass(const TargetRegisterClass *RC,
+                            const MachineFunction &MF) const override;
+
+  /// Stack Frame Processing Methods
+  void eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
+                           unsigned FIOperandNum,
+                           RegScavenger *RS = NULL) const override;
+
+  /// Debug information queries.
+  unsigned getFrameRegister(const MachineFunction &MF) const override;
+
+  /// Returns a TargetRegisterClass used for pointer values.
+  const TargetRegisterClass *
+  getPointerRegClass(const MachineFunction &MF,
+                     unsigned Kind = 0) const override;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_AVR_REGISTER_INFO_H