Remove uses of unsafeGlobalDynFlags for state hack
Currently there are a variety of uses of the terrible unsafeGlobalDynFlags scattered about the compiler to implement -fno-state-hack. This global state makes parallel compilation unreliable and complicates API usage. Remove these uses.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.2.1 |
| Type | Task |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
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| Operating system | |
| Architecture |