[Tcwg-commits] [llvm] branch master updated (b8ce57c5a8c -> de920afcf3a)

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from b8ce57c5a8c [Support] Base RWMutex on std::shared_timed_mutex (C++14) new de920afcf3a [X86] Improve cost model for subvector extraction of less t [...]

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Summary of changes: lib/Target/X86/X86TargetTransformInfo.cpp | 33 + .../CostModel/X86/shuffle-extract_subvector.ll | 1468 ++++++++++++-------- 2 files changed, 886 insertions(+), 615 deletions(-)