Traditionally, profiling with optimizations on has been a problem in
GHC's history... :-] Here's a new one:
-- Foo.hs -------------------------------------------------------------
module Foo where
import Foreign
bar :: () -> IO ()
bar x = _scc_ "mycc2" (makeStablePtr x >>= deRefStablePtr)
-- Main.hs ------------------------------------------------------------
import Foo
main :: IO ()
main = _scc_ "mycc1" (bar ())
-----------------------------------------------------------------------
ghc-3.01 -O -prof -fglasgow-exts -c Foo.hs -o Foo.o
ghc-3.01: module version changed to 1; reason: no old .hi file
ghc-3.01 -O -prof -fglasgow-exts -c Main.hs -o Main.o
ghc-3.01: module version changed to 1; reason: no old .hi file
ghc-3.01 -o blah -O -prof -fglasgow-exts Foo.o Main.o
Main.o(.text+0xe9): undefined reference to `CC_FooZdmycc2ZdDUPD_struct'
Main.o(.text+0xef): undefined reference to `CC_FooZdmycc2ZdDUPD_struct'
Some remarks:
* Sigbjorn's profiling patch from Feb 26th is already applied to our GHCs.
* The Foreign stuff is not important, what seems to matter is the
fact that makeStablePtr/deRefStablePtr are not inlined.
* Everything works fine without -O.
* Removing the _scc_s and using -auto-all doesn't work, either.
--
Sven Panne Tel.: +49/89/2178-2235
LMU, Institut fuer Informatik FAX : +49/89/2178-2211
LFE Programmier- und Modellierungssprachen Oettingenstr. 67
mailto:[EMAIL PROTECTED] D-80538 Muenchen
http://www.pms.informatik.uni-muenchen.de/mitarbeiter/panne
