#15960: Using -g causes differences in generated core. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.3 Component: Compiler | Version: 8.6.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by AndreasK): It directly contradicts the info on the wiki:
It is important to realize that - in contrast to instrumentation - adding DWARF debug information does not change the code sections of the executable.
In particular some expressions get turned into join points without -g, but are inlined without -g. This leads to different code being generated and ultimately also to different behaviour in regards to performance. It seems reasonably that it is caused by the adding of source notes you mentioned. But if source notes cause different inlining/join point behaviour I would still consider that a bug. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15960#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler