[PATCH] Divergence analysis for GPU programs

[Jingyue Wu]

Hi resistor, hfinkel, eliben, meheff,

Some optimizations such as jump threading and loop unswitching can negatively
affect performance when applied to divergent branches. The divergence analysis
added in this patch conservatively estimates which branches in a GPU program
can diverge. This information can then help LLVM to run certain optimizations
selectively.

http://reviews.llvm.org/D8576

Files:
  include/llvm/Analysis/Passes.h
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/Analysis/TargetTransformInfoImpl.h
  include/llvm/CodeGen/BasicTTIImpl.h
  include/llvm/InitializePasses.h
  include/llvm/LinkAllPasses.h
  lib/Analysis/Analysis.cpp
  lib/Analysis/CMakeLists.txt
  lib/Analysis/DivergenceAnalysis.cpp
  lib/Analysis/TargetTransformInfo.cpp
  lib/Target/NVPTX/NVPTXTargetTransformInfo.cpp
  lib/Target/NVPTX/NVPTXTargetTransformInfo.h
  test/Analysis/DivergenceAnalysis/NVPTX/diverge.ll
  test/Analysis/DivergenceAnalysis/NVPTX/lit.local.cfg

EMAIL PREFERENCES
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