1 //===-- R600RegisterInfo.h - R600 Register Info Interface ------*- 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 /// \file
10 /// Interface definition for R600RegisterInfo
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_LIB_TARGET_AMDGPU_R600REGISTERINFO_H
15 #define LLVM_LIB_TARGET_AMDGPU_R600REGISTERINFO_H
16 
17 #define GET_REGINFO_HEADER
18 #include "R600GenRegisterInfo.inc"
19 
20 namespace llvm {
21 
22 struct R600RegisterInfo final : public R600GenRegisterInfo {
23   R600RegisterInfo() : R600GenRegisterInfo(0) {}
24 
25   /// \returns the sub reg enum value for the given \p Channel
26   /// (e.g. getSubRegFromChannel(0) -> R600::sub0)
27   static unsigned getSubRegFromChannel(unsigned Channel);
28 
29   BitVector getReservedRegs(const MachineFunction &MF) const override;
30   const MCPhysReg *getCalleeSavedRegs(const MachineFunction *MF) const override;
31   Register getFrameRegister(const MachineFunction &MF) const override;
32 
33   /// get the HW encoding for a register's channel.
34   unsigned getHWRegChan(unsigned reg) const;
35 
36   unsigned getHWRegIndex(unsigned Reg) const;
37 
38   /// get the register class of the specified type to use in the
39   /// CFGStructurizer
40   const TargetRegisterClass *getCFGStructurizerRegClass(MVT VT) const;
41 
42   bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const override {
43     return false;
44   }
45 
46   // \returns true if \p Reg can be defined in one ALU clause and used in
47   // another.
48   bool isPhysRegLiveAcrossClauses(Register Reg) const;
49 
50   void eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
51                            unsigned FIOperandNum,
52                            RegScavenger *RS = nullptr) const override;
53 
54   void reserveRegisterTuples(BitVector &Reserved, unsigned Reg) const;
55 };
56 
57 } // End namespace llvm
58 
59 #endif
60