Mingsheng Hong ba38bcb279 Introduce a new 'bytes' form of the string_literal SIL instruction. Have it ...

print and parse as a stable hexadecimal form that isn't interpreted as UTF8.

One use case is in representing serialized protobuf strings (as in the
tensorflow branch: f7ed452eba/lib/SILOptimizer/Mandatory/TFPartition.cpp (L3875)).

The original work was done by @lattner and merged into the tensorflow
branch. This PR is to upstream those changes.

2018-07-27 11:58:00 -07:00

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