Support for locating of debug items in frames.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26984 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/CodeGen/MachineLocation.h b/include/llvm/CodeGen/MachineLocation.h
new file mode 100644 (file)
index 0000000..1756d32
--- /dev/null
+++ b/include/llvm/CodeGen/MachineLocation.h
@@ -0,0 +1,64 @@
+//===-- llvm/CodeGen/MachineLocation.h --------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by James M. Laskey and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// The MachineLocation class is used to represent a simple location in a machine
+// frame.  Locations will be one of two forms; a register or an address formed
+// from a base address plus an offset.
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_CODEGEN_MACHINELOCATION_H
+#define LLVM_CODEGEN_MACHINELOCATION_H
+
+namespace llvm {
+
+class MachineLocation {
+private:
+  bool IsRegister;                      // True if location is a register.
+  unsigned Register;                    // gcc/gdb register number.
+  int Offset;                           // Displacement if not register.
+
+public:
+  MachineLocation()
+  : IsRegister(false)
+  , Register(0)
+  , Offset(0)
+  {}
+  MachineLocation(unsigned R)
+  : IsRegister(true)
+  , Register(R)
+  , Offset(0)
+  {}
+  MachineLocation(unsigned R, int O)
+  : IsRegister(false)
+  , Register(R)
+  , Offset(0)
+  {}
+  
+  // Accessors
+  bool isRegister()      const { return IsRegister; }
+  unsigned getRegister() const { return Register; }
+  int getOffset()        const { return Offset; }
+  void setIsRegister(bool Is)  { IsRegister = Is; }
+  void setRegister(unsigned R) { Register = R; }
+  void setOffset(int O)        { Offset = O; }
+  void set(unsigned R) {
+    IsRegister = true;
+    Register = R;
+    Offset = 0;
+  }
+  void set(unsigned R, int O) {
+    IsRegister = false;
+    Register = R;
+    Offset = O;
+  }
+};
+
+} // End llvm namespace
+
+#endif