MaskRay added a comment.
Herald added a subscriber: sunshaoce.

In D146054#4587210 <https://reviews.llvm.org/D146054#4587210>, @4vtomat wrote:

> In D146054#4586067 <https://reviews.llvm.org/D146054#4586067>, @MaskRay wrote:
>
>> I think the best place to test `RISCVISAInfo.cpp` is 
>> `llvm/unittests/Support/RISCVISAInfoTest.cpp`.
>>
>> `clang/test/Driver/print-supported-extensions.c` can test just a few lines 
>> (there will be some overlap with the testing in 
>> `llvm/unittests/Support/RISCVISAInfoTest.cpp`), so that changes to RISC-V 
>> extensions will generally not require updates to 
>> `clang/test/Driver/print-supported-extensions.c`
>
> The goal of this patch is to list the supported extensions and their versions 
> by providing an option, so I guess 
> `clang/test/Driver/print-supported-extensions.c` aims differently with 
> `llvm/unittests/Support/RISCVISAInfoTest.cpp` which is testing the 
> functionalities in `RISCVISAInfoTest.cpp`.
> `clang/test/Driver/print-supported-extensions.c` only tracks the extensions 
> added and the their version changes and `riscvExtensionsHelp` in 
> `llvm/lib/Support/RISCVISAInfo.cpp` doesn't have any input or output as well 
> as any side effect, it only reads `SupportedExtensions` and 
> `SupportedExperimentalExtensions` and dump the information.
> So I think `clang/test/Driver/print-supported-extensions.c` is enough for 
> this patch?

My comment is about: the test is placed at the wrong layer. See 
https://maskray.me/blog/2021-08-08-toolchain-testing#the-test-checks-at-the-wrong-layer

I don't want that RISC-V development in LLVM causes repeated changes to 
`clang/test/Driver`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D146054/new/

https://reviews.llvm.org/D146054

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