New file, containing AllocInfo structure.

llvm-svn: 9449

1 files changed, 61 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/RegAlloc/AllocInfo.h b/llvm/lib/CodeGen/RegAlloc/AllocInfo.h
new file mode 100644
index 00000000000..ad230506fb3
--- /dev/null
+++ b/llvm/lib/CodeGen/RegAlloc/AllocInfo.h
@@ -0,0 +1,61 @@
+//===-- AllocInfo.h - Store info about regalloc decisions -------*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This header file contains the data structure used to save the state
+// of the global, graph-coloring register allocator.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ALLOCINFO_H
+#define ALLOCINFO_H
+
+#include "llvm/Type.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Constants.h"
+
+/// AllocInfo - Structure representing one instruction's operand's-worth of
+/// register allocation state. We create tables made out of these data
+/// structures to generate mapping information for this register allocator.
+///
+struct AllocInfo {
+  unsigned Instruction;
+  unsigned Operand;
+  unsigned AllocState;
+  int Placement;
+  AllocInfo (unsigned Instruction_, unsigned Operand_,
+             unsigned AllocState_, int Placement_) :
+    Instruction (Instruction_), Operand (Operand_),
+       AllocState (AllocState_), Placement (Placement_) { }
+
+  /// getConstantType - Return a StructType representing an AllocInfo object.
+  ///
+  static StructType *getConstantType () {
+    std::vector<const Type *> TV;
+    TV.push_back (Type::UIntTy);
+    TV.push_back (Type::UIntTy);
+    TV.push_back (Type::UIntTy);
+    TV.push_back (Type::IntTy);
+    return StructType::get (TV);
+  }
+
+  /// toConstant - Convert this AllocInfo into an LLVM Constant of type
+  /// getConstantType(), and return the Constant.
+  ///
+  Constant *toConstant () const {
+    StructType *ST = getConstantType ();
+    std::vector<Constant *> CV;
+    CV.push_back (ConstantUInt::get (Type::UIntTy, Instruction));
+    CV.push_back (ConstantUInt::get (Type::UIntTy, Operand));
+    CV.push_back (ConstantUInt::get (Type::UIntTy, AllocState));
+    CV.push_back (ConstantSInt::get (Type::IntTy, Placement));
+    return ConstantStruct::get (ST, CV);
+  }
+};
+
+#endif // ALLOCINFO_H