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from 6a295f2 [InstCombine] use m_APInt to allow (X << C) >>u C --> X & (-1 [...] new a3fb26f NewGVN: Add algorithm overview new e264bcd [Hexagon] Add Hexagon-specific loop idiom recognition pass

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Summary of changes: lib/Target/Hexagon/CMakeLists.txt | 1 + lib/Target/Hexagon/HexagonLoopIdiomRecognition.cpp | 1618 ++++++++++++++++++++ lib/Target/Hexagon/HexagonTargetMachine.cpp | 22 +- lib/Target/Hexagon/HexagonTargetMachine.h | 1 + lib/Transforms/Scalar/NewGVN.cpp | 21 + .../CodeGen/Hexagon/loop-idiom/hexagon-memmove1.ll | 36 + .../CodeGen/Hexagon/loop-idiom/hexagon-memmove2.ll | 36 + test/CodeGen/Hexagon/loop-idiom/lcssa.ll | 46 + test/CodeGen/Hexagon/loop-idiom/nullptr-crash.ll | 24 + test/CodeGen/Hexagon/loop-idiom/pmpy.ll | 33 + 10 files changed, 1833 insertions(+), 5 deletions(-) create mode 100644 lib/Target/Hexagon/HexagonLoopIdiomRecognition.cpp create mode 100644 test/CodeGen/Hexagon/loop-idiom/hexagon-memmove1.ll create mode 100644 test/CodeGen/Hexagon/loop-idiom/hexagon-memmove2.ll create mode 100644 test/CodeGen/Hexagon/loop-idiom/lcssa.ll create mode 100644 test/CodeGen/Hexagon/loop-idiom/nullptr-crash.ll create mode 100644 test/CodeGen/Hexagon/loop-idiom/pmpy.ll