https://bugs.llvm.org/show_bug.cgi?id=49179
Sanjay Patel <spatel+l...@rotateright.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Fixed By Commit(s)| |85294703a
--- Comment #6 from Sanjay Patel <spatel+l...@rotateright.com> ---
Should be fixed in IR with:
https://reviews.llvm.org/rG85294703a74a
We have seen complications with these kinds of transforms because LLVM supports
non-IEEE754-compliant targets, but I think this is always ok. If not, we'll
have to move the transform to the backend.
As noted in the comments, if variations of the specified pattern are found,
please file other bugs.
And finally (it's not clear from the description if we care about a particular
target), if the performance is still not optimal, we may need to adjust codegen
too. For x86, I'm seeing something like this currently:
movmskpd %xmm0, %eax
andl $1, %eax
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