[PATCH] D115594: [AVR] Optimize int16 shift operation for shift amount greater than 8

[Ben Shi via Phabricator via llvm-commits]

benshi001 created this revision.
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Skip operation on the lower byte in int16 logical left shift when
shift amount is greater than 8.

Skip operation on the higher byte in int16 logical & arithmetic
right shift when shift amount is greater than 8.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115594

Files:
  llvm/lib/Transforms/Utils/RelLookupTableConverter.cpp
  llvm/test/Transforms/RelLookupTableConverter/X86/relative_lookup_table.ll

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