#4414: scc001 fails: one SCC entered 0 times; another not mentioned when
optimisation is on
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Reporter: igloo | Owner: simonmar
Type: bug | Status: new
Priority: normal | Milestone: 7.0.2
Component: Profiling | Version: 6.12.3
Keywords: | Testcase:
Blockedby: | Difficulty:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Changes (by simonpj):
* owner: => simonmar
Comment:
This is a fix for the -O case:
{{{
Tue Oct 26 01:07:54 PDT 2010 [email protected]
* Don't look through SCC in exprIsConApp_maybe
By not taking account of SCC notes we were inadvertently
discarding some, which led to mis-counted entries with -O
Should fix (part of) Trac #4414
M ./compiler/coreSyn/CoreUnfold.lhs -4 +5
}}}
Profiled programs compiled with -O will run a bit slower, but the entry
count should be right.
Probably worth merging.
I'll change ownership to Simon M for the -O0 bug.
Simon
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4414#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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