Merge llvm fix to ghc-8.6
This ticket is a reminder to make sure that https://phabricator.haskell.org/D4969 (Fix a major copy'n'paste error in LLVM CodeGen) is merged to ghc-8.6.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.5 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | highest |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
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