Re: git: 9d87c1aac4a8 - main - libc: Add missing kill_dependency macro

Hey,

I see. I dug further into related proposals and the reasons why no
compiler today has implemented true data dependency tracking
and that they all basically map and promote consume to acquire.
The kill_dependency is also basically a no-op, and both compilers
optimise them identically. I did a few tests on my AArch64 box and
that's how I'm convinced, so I believe keeping the current form
could be ideal as it fully conforms to the standard and we're assured
that at least any conforming compiler would support it just fine and
there's no extension or non-standard tweak in it. On the other hand,
although adding a separate branch with the GCC style is possible, I
don't think that'd add any value but visual complications.

Either way, whether dependency tracking changes drastically or this
very approach becomes obsolete, keeping our header as-is seems
safe for now.

Again, I should admit that despite my enthusiasm for compilers and
long-time personal studies of that field, I am by no means an expert
and can be wrong, or at least miss some corner cases I'm not aware
of, so please educate me if so.

Yours,
Faraz