#4941: SpecConstr generates functions that do not use their arguments
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Reporter: simonpj | Owner:
Type: task | Status: new
Priority: normal | Milestone: _|_
Component: Compiler | Version: 7.0.1
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: Runtime performance bug
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Comment(by simonpj):
Well, if `go_s1gC` was externally visible (via the interface file), then
its RULE ''could'' still fire. But if it's not exported, it can't. So
* `CoreTidy` could discard RULES and unfoldings for non-externally-
visible things
* `CoreTidy` could run the occurrence analyser to drop code thereby shown
to be dead
But that still doesn't account for some programs allocating more and
running slower.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4941#comment:13>
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