Imported Upstream version 5.18.0.161

Former-commit-id: 4db48158d3a35497b8f118ab21b5f08ac3d86d98

external/llvm/utils/TableGen/CodeGenHwModes.h

@@ -0,0 +1,64 @@
+//===--- CodeGenHwModes.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// Classes to parse and store HW mode information for instruction selection.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H
+#define LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H
+
+#include "llvm/ADT/StringMap.h"
+#include <map>
+#include <string>
+#include <vector>
+
+// HwModeId -> list of predicates (definition)
+
+namespace llvm {
+  class Record;
+  class RecordKeeper;
+
+  struct CodeGenHwModes;
+
+  struct HwMode {
+    HwMode(Record *R);
+    StringRef Name;
+    std::string Features;
+    void dump() const;
+  };
+
+  struct HwModeSelect {
+    HwModeSelect(Record *R, CodeGenHwModes &CGH);
+    typedef std::pair<unsigned, Record*> PairType;
+    std::vector<PairType> Items;
+    void dump() const;
+  };
+
+  struct CodeGenHwModes {
+    enum : unsigned { DefaultMode = 0 };
+    static StringRef DefaultModeName;
+
+    CodeGenHwModes(RecordKeeper &R);
+    unsigned getHwModeId(StringRef Name) const;
+    const HwMode &getMode(unsigned Id) const {
+      assert(Id != 0 && "Mode id of 0 is reserved for the default mode");
+      return Modes[Id-1];
+    }
+    const HwModeSelect &getHwModeSelect(Record *R) const;
+    unsigned getNumModeIds() const { return Modes.size()+1; }
+    void dump() const;
+
+  private:
+    RecordKeeper &Records;
+    StringMap<unsigned> ModeIds;  // HwMode (string) -> HwModeId
+    std::vector<HwMode> Modes;
+    std::map<Record*,HwModeSelect> ModeSelects;
+  };
+}
+
+#endif // LLVM_UTILS_TABLEGEN_CODEGENHWMODES_H