Initial checkin of Machine Code representation for X86 backend. This will

eventually be merged with the sparc backend.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4286 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MFunction.h

@@ -0,0 +1,70 @@
+//===-- llvm/CodeGen/MFunction.h - Machine Specific Function ----*- C++ -*-===//
+//
+// This class provides a way to represent a function in a machine-specific form.
+// A function is represented as a list of machine specific blocks along with a
+// list of registers that are used to receive arguments for the function.
+//
+// In the machine specific representation for a function, the function may
+// either be in SSA form or in a register based form.  When in SSA form, the
+// register numbers are indexes into the RegDefMap that the MFunction contains.
+// This allows accessing SSA use-def information by using the source register
+// number for a use.
+//
+// After register allocation occurs, all of the register numbers in a function
+// refer to real hardware registers and the RegDefMap is cleared.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_MFUNCTION_H
+#define CODEGEN_MFUNCTION_H
+
+#include "llvm/CodeGen/MBasicBlock.h"
+#include <iosfwd>
+class MInstructionInfo;
+
+class MFunction {
+  iplist<MBasicBlock> BasicBlocks;
+  // FIXME: This should contain a pointer to the LLVM function
+public:
+
+  /// print - Provide a way to get a simple debugging dump.  This dumps the
+  /// machine code in a simple "assembly" language that is not really suitable
+  /// for an assembler, but is useful for debugging.  This is completely target
+  /// independant.
+  ///
+  void print(std::ostream &OS, const MInstructionInfo &MII) const;
+  void dump(const MInstructionInfo &MII) const;
+
+  // Provide accessors for the MBasicBlock list...
+  typedef iplist<MBasicBlock> BasicBlockListType;
+  typedef BasicBlockListType::iterator iterator;
+  typedef BasicBlockListType::const_iterator const_iterator;
+  typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
+  typedef std::reverse_iterator<iterator>             reverse_iterator;
+
+  // Provide accessors for basic blocks...
+  const BasicBlockListType &getBasicBlockList() const { return BasicBlocks; }
+        BasicBlockListType &getBasicBlockList()       { return BasicBlocks; }
+ 
+  //===--------------------------------------------------------------------===//
+  // BasicBlock iterator forwarding functions
+  //
+  iterator                begin()       { return BasicBlocks.begin(); }
+  const_iterator          begin() const { return BasicBlocks.begin(); }
+  iterator                end  ()       { return BasicBlocks.end();   }
+  const_iterator          end  () const { return BasicBlocks.end();   }
+
+  reverse_iterator       rbegin()       { return BasicBlocks.rbegin(); }
+  const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
+  reverse_iterator       rend  ()       { return BasicBlocks.rend();   }
+  const_reverse_iterator rend  () const { return BasicBlocks.rend();   }
+
+  unsigned                 size() const { return BasicBlocks.size(); }
+  bool                    empty() const { return BasicBlocks.empty(); }
+  const MBasicBlock      &front() const { return BasicBlocks.front(); }
+        MBasicBlock      &front()       { return BasicBlocks.front(); }
+  const MBasicBlock       &back() const { return BasicBlocks.back(); }
+        MBasicBlock       &back()       { return BasicBlocks.back(); }
+};
+
+#endif