[all-commits] [llvm/llvm-project] 7983f8: MIPS: allow o32 abi with 64bit CPU and 64 abi with...

[YunQiang Su via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7983f8aca82e258174849f1cc6a70029353e9887
      https://github.com/llvm/llvm-project/commit/7983f8aca82e258174849f1cc6a70029353e9887
  Author: YunQiang Su <wzssyqa at gmail.com>
  Date:   2023-05-16 (Tue, 16 May 2023)

  Changed paths:
    M clang/lib/Basic/Targets/Mips.cpp
    M clang/test/Driver/mips-abi.c
    A clang/test/Driver/mips-cpu64abi32.c
    M llvm/lib/Target/Mips/MipsSubtarget.cpp

  Log Message:
  -----------
  MIPS: allow o32 abi with 64bit CPU and 64 abi with 32bit triple

In general, MIPS support ELF format like
   ELF 32-bit LSB relocatable, MIPS, MIPS64 rel2 version 1 (SYSV)
and Linux's VDSO uses it.

Currently clang stop CMDs like
    clang -march=mips64r2 -mabi=32

While it is not needed now, since the the backend support the combination now.

This patch also allows something like
     clang --target=mipsel-linux-gnu -mabi=64
Since the triple can convert to right 64bit one automaticly.

Reviewed By: MaskRay

Differential Revision: https://reviews.llvm.org/D146269