[AVR] Added configuration file and machine function information class

This commit adds the 'AVRMachineFunctionInfo' class, which simply stores
basic properties about generated machine functions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256213 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/AVR/AVRConfig.h

@@ -0,0 +1,15 @@
+//===-- AVRConfig.h - AVR Backend Configuration Header ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_AVR_CONFIG_H
+#define LLVM_AVR_CONFIG_H
+
+#define LLVM_AVR_GCC_COMPAT
+
+#endif // LLVM_AVR_CONFIG_H

lib/Target/AVR/AVRMachineFunctionInfo.h

@@ -0,0 +1,73 @@
+//===-- AVRMachineFuctionInfo.h - AVR machine function info -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares AVR-specific per-machine-function information.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_AVR_MACHINE_FUNCTION_INFO_H
+#define LLVM_AVR_MACHINE_FUNCTION_INFO_H
+
+#include "AVRConfig.h"
+
+#include "llvm/CodeGen/MachineFunction.h"
+
+namespace llvm {
+
+/**
+ * Contains AVR-specific information for each MachineFunction.
+ */
+class AVRMachineFunctionInfo : public MachineFunctionInfo {
+  /// Indicates if a register has been spilled by the register
+  /// allocator.
+  bool HasSpills;
+
+  /// Indicates if there are any fixed size allocas present.
+  /// Note that if there are only variable sized allocas this is set to false.
+  bool HasAllocas;
+
+  /// Indicates if arguments passed using the stack are being
+  /// used inside the function.
+  bool HasStackArgs;
+
+  /// Size of the callee-saved register portion of the
+  /// stack frame in bytes.
+  unsigned CalleeSavedFrameSize;
+
+  /// FrameIndex for start of varargs area.
+  int VarArgsFrameIndex;
+
+public:
+  AVRMachineFunctionInfo()
+      : HasSpills(false), HasAllocas(false), HasStackArgs(false),
+        CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {}
+
+  explicit AVRMachineFunctionInfo(MachineFunction &MF)
+      : HasSpills(false), HasAllocas(false), HasStackArgs(false),
+        CalleeSavedFrameSize(0), VarArgsFrameIndex(0) {}
+
+  bool getHasSpills() const { return HasSpills; }
+  void setHasSpills(bool B) { HasSpills = B; }
+
+  bool getHasAllocas() const { return HasAllocas; }
+  void setHasAllocas(bool B) { HasAllocas = B; }
+
+  bool getHasStackArgs() const { return HasStackArgs; }
+  void setHasStackArgs(bool B) { HasStackArgs = B; }
+
+  unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
+  void setCalleeSavedFrameSize(unsigned Bytes) { CalleeSavedFrameSize = Bytes; }
+
+  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
+  void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
+};
+
+} // end llvm namespace
+
+#endif // LLVM_AVR_MACHINE_FUNCTION_INFO_H