[PATCH] D19338: New code hoisting pass based on GVN (optimistic approach)

[Sebastian Pop via llvm-commits]

sebpop updated this revision to Diff 57494.
sebpop added a comment.

Updated patch from Aditya: do not restrict hoisting when optimizing for code size.

Also Aditya asked to report the number of spills with/wo the patch.

- On SPEC2006 on x86_64, without the patch:

Number of spills inserted: 39703
with the patch:
Number of spills inserted: 39502 (-201)

- On the test-suite on x86_64, without the patch:

Number of spills inserted: 51148
with the patch:
Number of spills inserted: 51273 (+125)


http://reviews.llvm.org/D19338

Files:
  llvm/include/llvm/InitializePasses.h
  llvm/include/llvm/LinkAllPasses.h
  llvm/include/llvm/Transforms/Scalar.h
  llvm/include/llvm/Transforms/Scalar/GVN.h
  llvm/lib/Passes/PassRegistry.def
  llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
  llvm/lib/Transforms/Scalar/CMakeLists.txt
  llvm/lib/Transforms/Scalar/GVNHoist.cpp
  llvm/lib/Transforms/Scalar/Scalar.cpp
  llvm/lib/Transforms/Utils/MemorySSA.cpp
  llvm/test/Transforms/GVN/hoist.ll

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