tree 930dde87086260e8a36c57b03bdc91833b2945f3
parent c68fbc27d3ac70930d9192d00d0a83cb338f7006
author wanglei <wanglei@loongson.cn> 1659682117 +0800
committer Copybara-Service <copybara-worker@google.com> 1659684212 -0700

[LoongArch] Implement more of the ABI

According to the description of the LoongArch abi documentation,
(https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html)
the calling convention of LoongArch is almost the same as the RISCV's
(except for the vector part), so we borrow the implementation of RISCV.

This patch only guarantees the correctness of lp64d, because only the
part of lp64d is described in detail in the documentation.

Differential Revision: https://reviews.llvm.org/D130249

GitOrigin-RevId: 57eb77d4112b6055d4b3a1b7a5e50e2822cf859b