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Commit 010f0f00 authored by Craig Topper's avatar Craig Topper
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Revert "[RISCV] Use zexti32/sexti32 in srliw/sraiw isel patterns to improve... 

Revert "[RISCV] Use zexti32/sexti32 in srliw/sraiw isel patterns to improve usage of those instructions."

I thought this might help with another optimization I was
thinking about, but I don't think it will. So it just wastes
compile time calling computeKnownBits for no benefit.

This reverts commit 81b2f959.
parent f00941e0
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