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

[Kyle Butt via llvm-commits]

iteratee updated this revision to Diff 62529.
iteratee added a comment.

Added comment explaining why tail-merging can't use the unconditional branch heuristic when it is run during layout.


http://reviews.llvm.org/D18226

Files:
  include/llvm/CodeGen/TailDuplicator.h
  lib/CodeGen/BranchFolding.cpp
  lib/CodeGen/MachineBlockPlacement.cpp
  lib/CodeGen/TailDuplicator.cpp
  test/CodeGen/AArch64/machine_cse.ll
  test/CodeGen/PowerPC/branch-opt.ll
  test/CodeGen/PowerPC/tail-dup-analyzable-fallthrough.ll
  test/CodeGen/PowerPC/tail-dup-layout.ll
  test/CodeGen/WebAssembly/cfg-stackify.ll

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