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 |