Robin Kruppe 8e4f315116 Remove rustc_llvm dependency from librustc
Consequently, session creation can no longer initialize LLVM.
The few places that use the compiler without going through
rustc_driver/CompilerCalls thus need to be careful to manually
initialize LLVM (via rustc_trans!) immediately after session
creation.

This means librustc is not rebuilt when LLVM changes.
2017-05-15 11:13:30 +02:00
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