1 //===- llvm/CodeGen/Spiller.h - Spiller -------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_LIB_CODEGEN_SPILLER_H
10 #define LLVM_LIB_CODEGEN_SPILLER_H
11 
12 namespace llvm {
13 
14 class LiveRangeEdit;
15 class MachineFunction;
16 class MachineFunctionPass;
17 class VirtRegMap;
18 
19 /// Spiller interface.
20 ///
21 /// Implementations are utility classes which insert spill or remat code on
22 /// demand.
23 class Spiller {
24   virtual void anchor();
25 
26 public:
27   virtual ~Spiller() = 0;
28 
29   /// spill - Spill the LRE.getParent() live interval.
30   virtual void spill(LiveRangeEdit &LRE) = 0;
31 
32   virtual void postOptimization() {}
33 };
34 
35 /// Create and return a spiller that will insert spill code directly instead
36 /// of deferring though VirtRegMap.
37 Spiller *createInlineSpiller(MachineFunctionPass &pass, MachineFunction &mf,
38                              VirtRegMap &vrm);
39 
40 } // end namespace llvm
41 
42 #endif // LLVM_LIB_CODEGEN_SPILLER_H
43