The separate isLoadStoreImm12 predicate will be used for validating ELF/aarch64
ldst relocation types.
Reviewed By: lhames, sgraenitz
Differential Revision: https://reviews.llvm.org/D126628
This patch moves the aarch64 fixup logic from the MachO/arm64 backend to
aarch64.h header so that it can be re-used in the ELF/aarch64 backend. This
significantly expands relocation support in the ELF/aarch64 backend.
Reviewed By: lhames, sgraenitz
Differential Revision: https://reviews.llvm.org/D126286
Set up basic infrastructure for 64-bit ARM architecture support in JITLink. It allows for loading a minimal object file and resolving a single relocation. Advanced features like GOT and PLT handling or relaxations were intentionally left out for the moment.
This patch follows the idea to keep implementations for ARM (32-bit) and Aaarch64 (64-bit) separate, because:
* it might be easier to share code with the MachO "arm64" JITLink backend
* LLVM has individual targets for ARM and Aaarch64 as well
Reviewed By: lhames
Differential Revision: https://reviews.llvm.org/D108986
