Shilei Tian 03744d2aaf [Clang] Remove 3-element vector load and store special handling (#104661) ...

Clang uses a long-time special handling of the case where 3 element
vector loads and stores are performed as 4 element, and then a
shufflevector is used to extract the used elements. Odd sized vector
codegen should now work reasonably well.

This patch removes the compiler argument `-fpreserve-vec3-type` and adds
a target hook to determine if the special handling of vector type is
needed.

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Co-authored-by: Matt Arsenault <Matthew.Arsenault@amd.com>

2025-01-21 09:18:16 -05:00

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