LLVM  11.0.0git
ARMAsmBackendDarwin.h
Go to the documentation of this file.
1 //===-- ARMAsmBackendDarwin.h ARM Asm Backend Darwin ----------*- 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_LIB_TARGET_ARM_ARMASMBACKENDDARWIN_H
10 #define LLVM_LIB_TARGET_ARM_ARMASMBACKENDDARWIN_H
11 
12 #include "ARMAsmBackend.h"
14 #include "llvm/MC/MCObjectWriter.h"
15 
16 namespace llvm {
18  const MCRegisterInfo &MRI;
19  Triple TT;
20 public:
23  const MCRegisterInfo &MRI)
24  : ARMAsmBackend(T, STI, support::little), MRI(MRI),
25  TT(STI.getTargetTriple()),
26  Subtype((MachO::CPUSubTypeARM)cantFail(
27  MachO::getCPUSubType(STI.getTargetTriple()))) {}
28 
29  std::unique_ptr<MCObjectTargetWriter>
30  createObjectTargetWriter() const override {
32  /*Is64Bit=*/false, cantFail(MachO::getCPUType(TT)), Subtype);
33  }
34 
36  ArrayRef<MCCFIInstruction> Instrs) const override;
37 };
38 } // end namespace llvm
39 
40 #endif
void cantFail(Error Err, const char *Msg=nullptr)
Report a fatal error if Err is a failure value.
Definition: Error.h:708
This class represents lattice values for constants.
Definition: AllocatorList.h:23
static unsigned getCPUSubType(const MachOObjectFile &O)
Expected< uint32_t > getCPUType(const Triple &T)
Definition: MachO.cpp:77
ARMAsmBackendDarwin(const Target &T, const MCSubtargetInfo &STI, const MCRegisterInfo &MRI)
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory)...
Definition: APInt.h:32
MCRegisterInfo base class - We assume that the target defines a static array of MCRegisterDesc object...
uint32_t generateCompactUnwindEncoding(ArrayRef< MCCFIInstruction > Instrs) const override
Generate compact unwind encoding for the function based on the CFI instructions.
std::unique_ptr< MCObjectTargetWriter > createObjectTargetWriter() const override
Triple - Helper class for working with autoconf configuration names.
Definition: Triple.h:43
const MachO::CPUSubTypeARM Subtype
Target - Wrapper for Target specific information.
std::unique_ptr< MCObjectTargetWriter > createARMMachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype)
Construct an ARM Mach-O object writer.
Generic base class for all target subtargets.