1 //==- HexagonRegisterInfo.h - Hexagon Register Information Impl --*- C++ -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the Hexagon implementation of the TargetRegisterInfo
13 //===----------------------------------------------------------------------===//
15 #ifndef HexagonREGISTERINFO_H
16 #define HexagonREGISTERINFO_H
18 #include "llvm/Target/TargetRegisterInfo.h"
19 #include "llvm/MC/MachineLocation.h"
21 #define GET_REGINFO_HEADER
22 #include "HexagonGenRegisterInfo.inc"
25 // We try not to hard code the reserved registers in our code,
26 // so the following two macros were defined. However, there
27 // are still a few places that R11 and R10 are hard wired.
28 // See below. If, in the future, we decided to change the reserved
29 // register. Don't forget changing the following places.
31 // 1. the "Defs" set of STriw_pred in HexagonInstrInfo.td
32 // 2. the "Defs" set of LDri_pred in HexagonInstrInfo.td
33 // 3. the definition of "IntRegs" in HexagonRegisterInfo.td
34 // 4. the definition of "DoubleRegs" in HexagonRegisterInfo.td
36 #define HEXAGON_RESERVED_REG_1 Hexagon::R10
37 #define HEXAGON_RESERVED_REG_2 Hexagon::R11
41 class HexagonSubtarget;
42 class HexagonInstrInfo;
45 struct HexagonRegisterInfo : public HexagonGenRegisterInfo {
46 HexagonSubtarget &Subtarget;
47 const HexagonInstrInfo &TII;
49 HexagonRegisterInfo(HexagonSubtarget &st, const HexagonInstrInfo &tii);
51 /// Code Generation virtual methods...
52 const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0) const;
54 const TargetRegisterClass* const* getCalleeSavedRegClasses(
55 const MachineFunction *MF = 0) const;
57 BitVector getReservedRegs(const MachineFunction &MF) const;
59 void eliminateCallFramePseudoInstr(MachineFunction &MF,
60 MachineBasicBlock &MBB,
61 MachineBasicBlock::iterator I) const;
63 void eliminateFrameIndex(MachineBasicBlock::iterator II,
64 int SPAdj, RegScavenger *RS = NULL) const;
66 /// determineFrameLayout - Determine the size of the frame and maximum call
68 void determineFrameLayout(MachineFunction &MF) const;
70 /// requiresRegisterScavenging - returns true since we may need scavenging for
71 /// a temporary register when generating hardware loop instructions.
72 bool requiresRegisterScavenging(const MachineFunction &MF) const {
76 // Debug information queries.
77 unsigned getRARegister() const;
78 unsigned getFrameRegister(const MachineFunction &MF) const;
79 unsigned getFrameRegister() const;
80 void getInitialFrameState(std::vector<MachineMove> &Moves) const;
81 unsigned getStackRegister() const;
83 // Exception handling queries.
84 unsigned getEHExceptionRegister() const;
85 unsigned getEHHandlerRegister() const;
88 } // end namespace llvm