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from bb1cbfaf63f [llvm-mca] Add a -mattr flag new 133feded89e [NFC][InstCombine] (Better) tests for sign-bit-smearing pattern new d9952bbfc71 [InstCombine] Preserve 'exact' in -(X >>u 31) -> (X >>s 31) fold new ffe458a6f13 [InstCombine] Deal with -(trunc(X >>u 63)) -> trunc(X >>s 63)
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Summary of changes: lib/Transforms/InstCombine/InstCombineAddSub.cpp | 37 ++++-- .../InstCombine/high-bit-signmask-with-trunc.ll | 148 +++++++++++++++++++++ test/Transforms/InstCombine/high-bit-signmask.ll | 126 ++++++++++++++++++ 3 files changed, 301 insertions(+), 10 deletions(-) create mode 100644 test/Transforms/InstCombine/high-bit-signmask-with-trunc.ll create mode 100644 test/Transforms/InstCombine/high-bit-signmask.ll