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Use subreg_hNN and subreg_lNN for the high and low NN bits of a register. List the low registers first, so that subreg_l32 also means the low 32 bits of a 128-bit register. Floats are stored in the upper 32 bits of a 64-bit register, so they should use subreg_h32 rather than subreg_l32. No behavioral change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191659 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
//===-- SystemZRegisterInfo.h - SystemZ register information ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SystemZREGISTERINFO_H
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#define SystemZREGISTERINFO_H
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#include "SystemZ.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#define GET_REGINFO_HEADER
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#include "SystemZGenRegisterInfo.inc"
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namespace llvm {
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namespace SystemZ {
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// Return the subreg to use for referring to the even and odd registers
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// in a GR128 pair. Is32Bit says whether we want a GR32 or GR64.
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inline unsigned even128(bool Is32bit) {
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return Is32bit ? subreg_hl32 : subreg_h64;
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}
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inline unsigned odd128(bool Is32bit) {
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return Is32bit ? subreg_l32 : subreg_l64;
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}
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}
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class SystemZSubtarget;
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class SystemZInstrInfo;
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struct SystemZRegisterInfo : public SystemZGenRegisterInfo {
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private:
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SystemZTargetMachine &TM;
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public:
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SystemZRegisterInfo(SystemZTargetMachine &tm);
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// Override TargetRegisterInfo.h.
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virtual bool requiresRegisterScavenging(const MachineFunction &MF) const
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LLVM_OVERRIDE {
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return true;
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}
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virtual bool requiresFrameIndexScavenging(const MachineFunction &MF) const
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LLVM_OVERRIDE {
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return true;
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}
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virtual bool trackLivenessAfterRegAlloc(const MachineFunction &MF) const
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LLVM_OVERRIDE {
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return true;
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}
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virtual const uint16_t *getCalleeSavedRegs(const MachineFunction *MF = 0)
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const LLVM_OVERRIDE;
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virtual BitVector getReservedRegs(const MachineFunction &MF)
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const LLVM_OVERRIDE;
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virtual void eliminateFrameIndex(MachineBasicBlock::iterator MI,
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int SPAdj, unsigned FIOperandNum,
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RegScavenger *RS) const LLVM_OVERRIDE;
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virtual unsigned getFrameRegister(const MachineFunction &MF) const
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LLVM_OVERRIDE;
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};
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} // end namespace llvm
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#endif
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