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from 03c198b24f6 [Hexagon] Add missing flags to ELF YAMLIO new 246a4c60c28 [InstCombine] Canonicalize const arg for saturating adds new 06022d84cee [InstCombine] Use known overflow information for saturating [...] new 72d3673993c [ValueTracking] Determine always-overflow condition for uns [...] new 79fc38d0bd5 [InstCombine] Canonicalize ssub.sat to sadd.sat new e666b9ba92e [InstCombine] Combine saturating add/sub with constant operands

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Summary of changes: lib/Analysis/ValueTracking.cpp | 17 ++- lib/Transforms/InstCombine/InstCombineCalls.cpp | 89 ++++++++++++ test/Transforms/InstCombine/saturating-add-sub.ll | 158 +++++++++------------- 3 files changed, 164 insertions(+), 100 deletions(-)