| 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_CODEGEN_SPILLER_H |
| 10 | #define LLVM_CODEGEN_SPILLER_H |
| 11 | |
| 12 | #include "llvm/ADT/ArrayRef.h" |
| 13 | #include "llvm/CodeGen/Register.h" |
| 14 | |
| 15 | namespace llvm { |
| 16 | |
| 17 | class LiveRangeEdit; |
| 18 | class MachineFunction; |
| 19 | class MachineFunctionPass; |
| 20 | class VirtRegMap; |
| 21 | class VirtRegAuxInfo; |
| 22 | class LiveIntervals; |
| 23 | class LiveRegMatrix; |
| 24 | class LiveStacks; |
| 25 | class MachineDominatorTree; |
| 26 | class MachineBlockFrequencyInfo; |
| 27 | class AllocationOrder; |
| 28 | |
| 29 | /// Spiller interface. |
| 30 | /// |
| 31 | /// Implementations are utility classes which insert spill or remat code on |
| 32 | /// demand. |
| 33 | class Spiller { |
| 34 | virtual void anchor(); |
| 35 | |
| 36 | public: |
| 37 | virtual ~Spiller() = 0; |
| 38 | |
| 39 | /// spill - Spill the LRE.getParent() live interval. |
| 40 | virtual void spill(LiveRangeEdit &LRE, AllocationOrder *Order = nullptr) = 0; |
| 41 | |
| 42 | /// Return the registers that were spilled. |
| 43 | virtual ArrayRef<Register> getSpilledRegs() = 0; |
| 44 | |
| 45 | /// Return registers that were not spilled, but otherwise replaced |
| 46 | /// (e.g. rematerialized). |
| 47 | virtual ArrayRef<Register> getReplacedRegs() = 0; |
| 48 | |
| 49 | virtual void postOptimization() {} |
| 50 | |
| 51 | struct RequiredAnalyses { |
| 52 | LiveIntervals &LIS; |
| 53 | LiveStacks &LSS; |
| 54 | MachineDominatorTree &MDT; |
| 55 | const MachineBlockFrequencyInfo &MBFI; |
| 56 | }; |
| 57 | }; |
| 58 | |
| 59 | /// Create and return a spiller that will insert spill code directly instead |
| 60 | /// of deferring though VirtRegMap. |
| 61 | Spiller *createInlineSpiller(const Spiller::RequiredAnalyses &Analyses, |
| 62 | MachineFunction &MF, VirtRegMap &VRM, |
| 63 | VirtRegAuxInfo &VRAI, |
| 64 | LiveRegMatrix *Matrix = nullptr); |
| 65 | |
| 66 | } // end namespace llvm |
| 67 | |
| 68 | #endif // LLVM_CODEGEN_SPILLER_H |
| 69 |