25cc5a71b3
The existing vector.transpose lowering patterns only triggers if the input vector is 2D. The revision extends the pattern to handle n-D vectors which are effectively 2-D vectors (e.g., vector<1x4x1x8x1). It refactors a common check about 2-D vectors from X86Vector lowering to VectorUtils.h so it can be reused by both sides. Reviewed By: dcaballe Differential Revision: https://reviews.llvm.org/D149908