tagToEnum# . dataToTag# not optimized away
Consider
foo :: Int# -> Int#
foo x = dataToTag# (tagToEnum# x :: Bool)
bar :: Bool -> Bool
bar x = tagToEnum# (dataToTag# x)These are both effectively identity functions. But while foo simplifies to one, bar does not! We might want to fix that.
Trac metadata
| Trac field | Value |
|---|---|
| Version | 8.2.1 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture |