llvm dev - Mar 2016 - Path.cpp (in LLVMSupport) constant value truncations?

I'm trying to see what currently disabled MSVC warnings we can re-enable.
In Path.cpp, I noticed that the function identify_magic in LLVMSupport
generates *fifteen* "C4310: cast truncates constant value" warnings.

In that function, on 15 lines, two byte literals are cast to one byte
chars. What's going on there?

Sincerely,
Alexander Riccio
--
"Change the world or go home."
about.me/ariccio

<http://about.me/ariccio>
If left to my own devices, I will build more.
⁂
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