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[BasicTTI] When costing a scalarized cast, use distinct src and dest types #109325

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[BasicTTI] When costing a scalarized cast, use distinct src and dest types #109325

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Commits on Sep 19, 2024

  1. [BasicTTI] When costing a scalarized cast, use distinct src and dest … 

    …types

When we fallback on scalarizing a vector cast, BasicTTI was assuming that
the type being extracted was the same as that being inserted.  This is
not true when scalarizing a e.g. truncate, zext, or sext.

I have made no attempt to confirm the test diffs are profitable in terms
of e.g. vectorization result for the various targets impacted.
    @preames
    preames committed Sep 19, 2024
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  2. clang-format

    @preames
    preames committed Sep 19, 2024
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