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* [optimizing] Add if-context sensitivity for null popagation.Calin Juravle2015-02-241-0/+24
| | | | Change-Id: I3725b6c6a6cf44440c34a1bfb67e623531e665d6
* Fix null check testsCalin Juravle2015-02-091-17/+17
| | | | Change-Id: Iafd3b1f58ed7ce45350b4b3aa493bafc63ade179
* optimizing: NullCheck eliminationCalin Juravle2015-01-293-0/+230
How it works: - run a type analysis to propagate null information on instructions - during the last instruction simplifier remove null checks for which the input is known to be not null The current type analysis is actually a nullability analysis but it will be reused in follow up CLs to propagate type information: so it keeps the more convenient name. Change-Id: I54bb1d32ab24604b4d677d1ecdaf8d60a5ff5ce9