#13390: Strict literal float-out during desugaring regresses T1969 at -O0 -------------------------------------+------------------------------------- Reporter: bgamari | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.4.1 Component: Compiler | Version: 8.0.1 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 dfeuer): OK, so I guess the reason for this is pretty clear: with floating, `$cc_a1i7` looks small enough to inline (even at `-O0`), and it inlines, and so we then lose the "phantom CSE" that we got from inlining the defaults instead. It's not clear to me that there's much we could do that would obviously improve matters in general. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13390#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler