Fixed several bugs in the propagation of "uninitialized value"
taintness across expressions.

Made "smart-culling" of taint propagation (for error reporting)
correctly handle conditional expressions and a few other edge cases.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@42421 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed