[PATCH] Add a fence elimination pass

[Robin Morisset]

Add an option "-view-fences-pre-flow-graph" to visualize the graph being used,
per the request of jfb (it makes things much easier to debug).

Also some general cleanup.

Reviews most welcome !

http://reviews.llvm.org/D5758

Files:
  include/llvm/InitializePasses.h
  include/llvm/Transforms/Scalar.h
  lib/Target/PowerPC/PPCTargetMachine.cpp
  lib/Transforms/Scalar/CMakeLists.txt
  lib/Transforms/Scalar/FencesPRE.cpp
  lib/Transforms/Scalar/Scalar.cpp
  test/CodeGen/PowerPC/atomics-fences-pre.ll
-------------- next part --------------
A non-text attachment was scrubbed...
Name: D5758.15195.patch
Type: text/x-patch
Size: 33364 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20141021/1dc852ea/attachment.bin>