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[SCCP] Rename undefined -> unknown.

Description

[SCCP] Rename undefined -> unknown.

In the solver, isUndefined() does really mean "we don't know the
value yet" rather than "this is an UndefinedValue". Discussed with
Eli Friedman.

Differential Revision: http://reviews.llvm.org/D22192

Details

Committed
davideJul 9 2016, 5:35 PM
Differential Revision
D22192: [SCCP] Change isUndefined() -> isUnknown()
Parents
rL275003: Update comments.
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