[PATCH] D18226: Codegen: Tail-duplicate during placement.

[Kyle Butt via llvm-commits]

iteratee removed rL LLVM as the repository for this revision.
iteratee updated this revision to Diff 51371.
iteratee added a comment.

Added a test.

Note that the test won't pass until my rotate patch for PPC lands, as it shrinks the test blocks to 2 instructions so they can be duplicated.
Other minor cleanups from comments.


http://reviews.llvm.org/D18226

Files:
  lib/CodeGen/MachineBlockPlacement.cpp
  lib/CodeGen/TailDuplication.cpp
  test/CodeGen/AArch64/machine_cse.ll
  test/CodeGen/PowerPC/tail-dup-layout.ll

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