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[ConstantFolding] Add support for saturating add/sub

Authored by nikic on Nov 14 2018, 8:42 AM.



Support saturating add/sub in constant folding, based on the APInt methods introduced in D54332.

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nikic created this revision.Nov 14 2018, 8:42 AM
spatel accepted this revision.Nov 14 2018, 10:45 AM
spatel added a subscriber: spatel.

LGTM - but it would be better to vary the 'i8' in these tests to get broader testing.

This revision is now accepted and ready to land.Nov 14 2018, 10:45 AM
This revision was automatically updated to reflect the committed changes.