#9505: Bounded instance for Word (and possibly others) uses explicitly unboxed literals -------------------------------------+------------------------------------- Reporter: schyler | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9505#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#9505: Bounded instance for Word (and possibly others) uses explicitly unboxed literals -------------------------------------+------------------------------------- Reporter: schyler | Owner: ekmett Type: bug | Status: new Priority: normal | Milestone: Component: Core | Version: 7.8.2 Libraries | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by hvr): That's strange... I tried with GHC's going back to 6.12.3 but couldn't reproduce the problem described. I always end up with `GHC.Word.W# (__word 18446744073709551615)` with `-ddump-simpl`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9505#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#9505: Bounded instance for Word (and possibly others) uses explicitly unboxed literals -------------------------------------+------------------------------------- Reporter: schyler | Owner: ekmett Type: task | Status: new Priority: lowest | Milestone: ⊥ Component: Core | Version: 7.8.2 Libraries | Keywords: Resolution: | Architecture: Unknown/Multiple Operating System: | Difficulty: Unknown Unknown/Multiple | Blocked By: Type of failure: | Related Tickets: None/Unknown | Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by thomie): 6.12.3 was released in June 2010. That code was introduced in {{{ commit 9eef5c0bc0cf1670f55427dacf592c0ea415e7e6 Author: simonmar <unknown> Date: Tue May 25 09:27:16 2004 +0000 [project @ 2004-05-25 09:27:16 by simonmar] Small performance hack in maxBound::Word. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9505#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#9505: Bounded instance for Word (and possibly others) uses explicitly unboxed literals -------------------------------------+------------------------------------- Reporter: schyler | Owner: (none) Type: task | Status: new Priority: lowest | Milestone: ⊥ Component: Core Libraries | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): -------------------------------------+------------------------------------- Comment (by Ryan Scott ): In [changeset:"75a8349b2a7d0142d3d687837caf5a95bbb4368d/ghc" 75a8349/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="75a8349b2a7d0142d3d687837caf5a95bbb4368d" Warn on all out-of-range literals in pats/exprs Summary: These changes were motivated by #13256. While poking around, I realized we weren't very consistent in our "-Woverflowed-literals" warnings. This patch fixes that by: * warning earlier on in the pipeline (ie. before we've desugared 'Int' patterns into 'I# Int#') * handling 'HsLit' as well as 'HsOverLit' (this covers unboxed literals) * covering more pattern / expression forms 4/6 of the warnings in the 'Overflow' test are due to this patch. The other two are mostly for completeness. Also fixed a missing empty-enumeration warning for 'Natural'. This warnings were tripped up by the 'Bounded Word' instance (see #9505), but the fix was obvious and simple: use unboxed word literals. Test Plan: make TEST=Overflow && make TEST=T10930 Reviewers: hvr, bgamari, RyanGlScott Reviewed By: RyanGlScott Subscribers: RyanGlScott, rwbarton, carter GHC Trac Issues: #13256, #10930 Differential Revision: https://phabricator.haskell.org/D5181 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9505#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler