[all-commits] [llvm/llvm-project] 302a16: [MIPS] Fix switching between 32/64-bit variants of...

[YunQiang Su via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 302a165e18fda8318e9e1ce6f452a48925cb3857
      https://github.com/llvm/llvm-project/commit/302a165e18fda8318e9e1ce6f452a48925cb3857
  Author: YunQiang Su <wzssyqa at gmail.com>
  Date:   2021-10-21 (Thu, 21 Oct 2021)

  Changed paths:
    M llvm/include/llvm/ADT/Triple.h
    M llvm/lib/Support/Triple.cpp
    M llvm/unittests/ADT/TripleTest.cpp

  Log Message:
  -----------
  [MIPS] Fix switching between 32/64-bit variants of r6 target triples

If clang driver gets 64-bit r6 target triple like `mipsisa64r6` and
additional option forces switching to generation of 32-bit code, it
loses r6 abi and generates 32-bit r2-r5 abi code.

```
$ clang -target mipsisa64r6-linux-gnu -mabi=32
```

This patch fixes the problem.

- Add optional `SubArchType` argument to the `Triple::setArch()` method.
- Implement generation of mips r6 target triples in the
  `Triple::getArchName()` method.

Differential Revision: https://reviews.llvm.org/D110514.diff