[PATCH] D22214: Convert a signed remainder instruction to unsigned remainder

[Sjoerd Meijer via llvm-commits]

SjoerdMeijer created this revision.
SjoerdMeijer added reviewers: bkramer, chandlerc, jmolloy, mehdi_amini.
SjoerdMeijer added a subscriber: llvm-commits.

This converts a signed remainder instruction to unsigned remainder, which enables the code size optimisation to fold a rem and div into a single aeabi_uidivmod call. This was not happening before because sdiv was converted but srem not, and instructions with different signedness are not combined.

http://reviews.llvm.org/D22214

Files:
  lib/Transforms/Scalar/CorrelatedValuePropagation.cpp
  test/Transforms/CorrelatedValuePropagation/srem.ll

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