nemanjai wrote:
> I have always been unconvinced that these are a good idea to have / add
> significant value over using inline assembly. IIRC Arm has them but nobody
> uses them?
Is this a comment about the general concept of builtins to produce specific
instructions or about these specific ones?
For these ones, the patch isn't something I materialized out of thin air just
because I think it's nice to have - it was in response to the very use case I
described (from a library writer). They had something like:
```
void __attribute__((always_inline)) set_csr(unsigned CSRNum, unsigned Val) {
__asm__ volatile ...
```
Which works great if you're optimizing, but doesn't with -O0. Of course they
could write it as a macro, but that has all the pitfalls of function-style
macros.
Of course, if the consensus is to not provide these because of some reason, I'm
fine with that - I would just like to understand the reason for the opposition
to this.
https://github.com/llvm/llvm-project/pull/85091
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