As mentioned in D93793, there are quite a few places where unary `IRBuilder::CreateShuffleVector(X, Mask)` can be used
instead of `IRBuilder::CreateShuffleVector(X, Undef, Mask)`.
Let's update them.
Actually, it would have been more natural if the patches were made in this order:
(1) let them use unary CreateShuffleVector first
(2) update IRBuilder::CreateShuffleVector to use poison as a placeholder value (D93793)
The order is swapped, but in terms of correctness it is still fine.
Reviewed By: spatel
Differential Revision: https://reviews.llvm.org/D93923
Summary:
Only column-major was supported so far. This adds row-major support as well.
Note that we probably also want very efficient SIMD implementations for the
various target platforms.
Bug:
https://bugs.llvm.org/show_bug.cgi?id=46085
Reviewers: nicolasvasilache, reidtatge, bkramer, fhahn, ftynse, andydavis1, craig.topper, dcaballe, mehdi_amini, anemet
Reviewed By: fhahn
Subscribers: hiraditya, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D80673
