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Diffstat (limited to 'lib/Target/Hexagon/HexagonRegisterInfo.h')
-rw-r--r-- | lib/Target/Hexagon/HexagonRegisterInfo.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/Target/Hexagon/HexagonRegisterInfo.h b/lib/Target/Hexagon/HexagonRegisterInfo.h new file mode 100644 index 0000000000..33b0c14453 --- /dev/null +++ b/lib/Target/Hexagon/HexagonRegisterInfo.h @@ -0,0 +1,89 @@ +//==- HexagonRegisterInfo.h - Hexagon Register Information Impl --*- C++ -*-==// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file contains the Hexagon implementation of the TargetRegisterInfo +// class. +// +//===----------------------------------------------------------------------===// + +#ifndef HexagonREGISTERINFO_H +#define HexagonREGISTERINFO_H + +#include "llvm/Target/TargetRegisterInfo.h" +#define GET_REGINFO_HEADER +#include "HexagonGenRegisterInfo.inc" +#include "llvm/MC/MachineLocation.h" + +// +// We try not to hard code the reserved registers in our code, +// so the following two macros were defined. However, there +// are still a few places that R11 and R10 are hard wired. +// See below. If, in the future, we decided to change the reserved +// register. Don't forget changing the following places. +// +// 1. the "Defs" set of STriw_pred in HexagonInstrInfo.td +// 2. the "Defs" set of LDri_pred in HexagonInstrInfo.td +// 3. the definition of "IntRegs" in HexagonRegisterInfo.td +// 4. the definition of "DoubleRegs" in HexagonRegisterInfo.td +// +#define HEXAGON_RESERVED_REG_1 Hexagon::R10 +#define HEXAGON_RESERVED_REG_2 Hexagon::R11 + +namespace llvm { + +class HexagonSubtarget; +class HexagonInstrInfo; +class Type; + +struct HexagonRegisterInfo : public HexagonGenRegisterInfo { + HexagonSubtarget &Subtarget; + const HexagonInstrInfo &TII; + + HexagonRegisterInfo(HexagonSubtarget &st, const HexagonInstrInfo &tii); + + /// Code Generation virtual methods... + const unsigned *getCalleeSavedRegs(const MachineFunction *MF = 0) const; + + const TargetRegisterClass* const* getCalleeSavedRegClasses( + const MachineFunction *MF = 0) const; + + BitVector getReservedRegs(const MachineFunction &MF) const; + + void eliminateCallFramePseudoInstr(MachineFunction &MF, + MachineBasicBlock &MBB, + MachineBasicBlock::iterator I) const; + + void eliminateFrameIndex(MachineBasicBlock::iterator II, + int SPAdj, RegScavenger *RS = NULL) const; + + /// determineFrameLayout - Determine the size of the frame and maximum call + /// frame size. + void determineFrameLayout(MachineFunction &MF) const; + + /// requiresRegisterScavenging - returns true since we may need scavenging for + /// a temporary register when generating hardware loop instructions. + bool requiresRegisterScavenging(const MachineFunction &MF) const { + return true; + } + + // Debug information queries. + unsigned getRARegister() const; + unsigned getFrameRegister(const MachineFunction &MF) const; + unsigned getFrameRegister() const; + void getInitialFrameState(std::vector<MachineMove> &Moves) const; + unsigned getStackRegister() const; + + // Exception handling queries. + unsigned getEHExceptionRegister() const; + unsigned getEHHandlerRegister() const; +}; + +} // end namespace llvm + +#endif |