[PATCH] D15894: Implement load to store => memcpy in MemCpyOpt for aggregates

[Amaury SECHET via llvm-commits]

deadalnix created this revision.
deadalnix added reviewers: craig.topper, spatel, dexonsmith, Prazek, chandlerc.
deadalnix added a subscriber: llvm-commits.

Most of the tool chain is able to optimize scalar and memcpy like operation effisciently while it isn't that good with aggregates. In order to improve the support of aggregate, we try to change aggregate manipulation into either scalar or memcpy like ones whenever possible without loosing informations.

This is one such opportunity.

http://reviews.llvm.org/D15894

Files:
  lib/Transforms/Scalar/MemCpyOptimizer.cpp
  test/Transforms/MemCpyOpt/fca2memcpy.ll

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