Matt Arsenault e46badd4e9 GlobalISel: Have lowerLoad scalarize unaligned vectors
This could be smarter by picking an ideal type, or at least splitting
the vector in half first. Also handles lower for non-power-of-2,
non-extending vector loads.

Currently this just avoids failing to legalize some odd vector AMDGPU
tests, but is a step towards removing the split logic from the
NarrowScalar logic.
2021-07-30 13:23:29 -04:00
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