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[TableGen] Simplify generated code for isSubclass #117351

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[TableGen] Simplify generated code for isSubclass #117351

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Commits on Nov 22, 2024

  1. [TableGen] Simplify generated code for isSubclass 

    Implement isSubclass with some tables and a single call to lower_bound
instead of nested switches.

Part of the motivation for this is improving compile time when clang-18
is used as a host compiler, since it seems to have trouble with very
large switch statements.
    @jayfoad
    jayfoad committed Nov 22, 2024
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