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from 2128e74 [X86][AVX] Add VBROADCASTF128/VBROADCASTI128 shuffle comments [...] new 16129fc code hoisting pass based on GVN new 2bb340c [X86][AVX] Add 128-bit wide shuffle tests that should combine [...]

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Summary of changes: include/llvm/InitializePasses.h | 1 + include/llvm/LinkAllPasses.h | 1 + include/llvm/Transforms/Scalar.h | 7 + include/llvm/Transforms/Scalar/GVN.h | 15 +- lib/Passes/PassRegistry.def | 1 + lib/Transforms/IPO/PassManagerBuilder.cpp | 1 + lib/Transforms/Scalar/CMakeLists.txt | 1 + lib/Transforms/Scalar/GVNHoist.cpp | 820 ++++++++++++++++++++++ lib/Transforms/Scalar/Scalar.cpp | 5 + test/CodeGen/X86/vector-shuffle-combining-avx.ll | 26 + test/CodeGen/X86/vector-shuffle-combining-avx2.ll | 12 + test/Transforms/GVN/hoist-pr20242.ll | 74 ++ test/Transforms/GVN/hoist-pr22005.ll | 30 + test/Transforms/GVN/hoist.ll | 691 ++++++++++++++++++ 14 files changed, 1681 insertions(+), 4 deletions(-) create mode 100644 lib/Transforms/Scalar/GVNHoist.cpp create mode 100644 test/Transforms/GVN/hoist-pr20242.ll create mode 100644 test/Transforms/GVN/hoist-pr22005.ll create mode 100644 test/Transforms/GVN/hoist.ll