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

[Sebastian Pop via llvm-commits]

sebpop removed rL LLVM as the repository for this revision.
sebpop updated this revision to Diff 54684.
sebpop added a comment.

The updated patch from Aditya has some cleanups, compile time improvements, and uses less memory.

We measured the total number of instructions executed when "clang -cc1" is compiling all the preprocessed files of the llvm test-suite through valgrind:

- with patch: 926457230716
- without: 923166450214

Overall compilation overhead of the new pass is 0.35%.


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/test/Transforms/GVN/hoist.ll

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