Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/lib/CodeGen/Spiller.h

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+//===- llvm/CodeGen/Spiller.h - Spiller -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_SPILLER_H
+#define LLVM_LIB_CODEGEN_SPILLER_H
+
+namespace llvm {
+
+class LiveRangeEdit;
+class MachineFunction;
+class MachineFunctionPass;
+class VirtRegMap;
+
+  /// Spiller interface.
+  ///
+  /// Implementations are utility classes which insert spill or remat code on
+  /// demand.
+  class Spiller {
+    virtual void anchor();
+
+  public:
+    virtual ~Spiller() = 0;
+
+    /// spill - Spill the LRE.getParent() live interval.
+    virtual void spill(LiveRangeEdit &LRE) = 0;
+
+    virtual void postOptimization() {}
+  };
+
+  /// Create and return a spiller that will insert spill code directly instead
+  /// of deferring though VirtRegMap.
+  Spiller *createInlineSpiller(MachineFunctionPass &pass,
+                               MachineFunction &mf,
+                               VirtRegMap &vrm);
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_CODEGEN_SPILLER_H