[PATCH] D69500: [X86] NFC: Convert LLVM command-line flag to target attribute

[David Zarzycki via Phabricator via llvm-commits]

davezarzycki added a comment.

In D69500#1730264 <https://reviews.llvm.org/D69500#1730264>, @craig.topper wrote:

> I still don’t understand why we’re not just renaming the existing flag? What are you planning to connect the old flag to?


I didn't remove it because it seemed like information would be "lost". Said differently, I didn't know that some AMD CPUs have fast partial updates too.

I made a quick attempt at using the "fast partial" flag so that it wouldn't be left unused, but I got distracted. (For example using SSE move instructions instead of VINSERT*)

And yes, the -target-feature flag can be reached from the driver via -Xclang.


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https://reviews.llvm.org/D69500