1 files changed, 101 insertions, 0 deletions
diff --git a/contrib/llvm/utils/TableGen/CodeGenRegisters.h b/contrib/llvm/utils/TableGen/CodeGenRegisters.h
new file mode 100644
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+++ b/contrib/llvm/utils/TableGen/CodeGenRegisters.h
@@ -0,0 +1,101 @@
+//===- CodeGenRegisters.h - Register and RegisterClass 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 defines structures to encapsulate information gleaned from the
+// target register and register class definitions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CODEGEN_REGISTERS_H
+#define CODEGEN_REGISTERS_H
+
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/ADT/DenseMap.h"
+#include <string>
+#include <vector>
+#include <set>
+#include <cstdlib>
+
+namespace llvm {
+  class Record;
+
+  /// CodeGenRegister - Represents a register definition.
+  struct CodeGenRegister {
+    Record *TheDef;
+    const std::string &getName() const;
+    unsigned DeclaredSpillSize, DeclaredSpillAlignment;
+    CodeGenRegister(Record *R);
+  };
+
+
+  struct CodeGenRegisterClass {
+    Record *TheDef;
+    std::string Namespace;
+    std::vector<Record*> Elements;
+    std::vector<MVT::SimpleValueType> VTs;
+    unsigned SpillSize;
+    unsigned SpillAlignment;
+    int CopyCost;
+    // Map SubRegIndex -> RegisterClass
+    DenseMap<Record*,Record*> SubRegClasses;
+    std::string MethodProtos, MethodBodies;
+
+    const std::string &getName() const;
+    const std::vector<MVT::SimpleValueType> &getValueTypes() const {return VTs;}
+    unsigned getNumValueTypes() const { return VTs.size(); }
+    
+    MVT::SimpleValueType getValueTypeNum(unsigned VTNum) const {
+      if (VTNum < VTs.size())
+        return VTs[VTNum];
+      assert(0 && "VTNum greater than number of ValueTypes in RegClass!");
+      abort();
+    }
+    
+    bool containsRegister(Record *R) const {
+      for (unsigned i = 0, e = Elements.size(); i != e; ++i)
+        if (Elements[i] == R) return true;
+      return false;
+    }
+    
+    // Returns true if RC is a strict subclass.
+    // RC is a sub-class of this class if it is a valid replacement for any
+    // instruction operand where a register of this classis required. It must 
+    // satisfy these conditions:
+    //
+    // 1. All RC registers are also in this.
+    // 2. The RC spill size must not be smaller than our spill size.
+    // 3. RC spill alignment must be compatible with ours.
+    //
+    bool hasSubClass(const CodeGenRegisterClass *RC) const {
+
+      if (RC->Elements.size() > Elements.size() ||
+          (SpillAlignment && RC->SpillAlignment % SpillAlignment) ||
+          SpillSize > RC->SpillSize)
+        return false;
+
+      std::set<Record*> RegSet;
+      for (unsigned i = 0, e = Elements.size(); i != e; ++i) {
+        Record *Reg = Elements[i];
+        RegSet.insert(Reg);
+      }
+
+      for (unsigned i = 0, e = RC->Elements.size(); i != e; ++i) {
+        Record *Reg = RC->Elements[i];
+        if (!RegSet.count(Reg))
+          return false;
+      }
+
+      return true;
+    }
+
+    CodeGenRegisterClass(Record *R);
+  };
+}
+
+#endif