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from b66a27453d8 [X86] Add some basic add/sub saturation combine tests. new 75e47eac7cb [DAGCombiner] Some very basic add/sub saturation combines. new 5fba77096ae Fix unused variable warning. NFCI.

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Summary of changes: lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 63 ++++++++++++++++++++++++++++++++ test/CodeGen/X86/combine-add-ssat.ll | 26 +++---------- test/CodeGen/X86/combine-add-usat.ll | 18 ++------- test/CodeGen/X86/combine-sub-ssat.ll | 22 ++--------- test/CodeGen/X86/combine-sub-usat.ll | 18 ++------- 5 files changed, 81 insertions(+), 66 deletions(-)