[PATCH] D35035: [InstCombine] Prevent memcpy generation for small data size

[DIVYA SHANMUGHAN via Phabricator via llvm-commits]

DIVYA created this revision.

InstCombine pass converts  @llvm.memcpy to either memcpy or LD/ST depending on if the data size is greater than 8 bytes or not.
However for different targets, 8 bytes may be smaller.
Hence, we queried target datalayout to find the threshold.

Worked in collaboration with Aditya Kumar


https://reviews.llvm.org/D35035

Files:
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  test/Transforms/InstCombine/builtin_memcpy_pattern.ll

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