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Commit bc0e0527 authored by Craig Topper's avatar Craig Topper
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[RISCV] Teach targetShrinkDemandedConstant to preserve (and X, 0xffff) when zext.h is supported. 

Similar to what we do for zext.w.

Disable the (srl (and X, 0xffff), C) custom isel when zext.h is
available.
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