[GHC] #14821: -O2 forces -optlo-O3 in a way that cannot be overridden at command line
#14821: -O2 forces -optlo-O3 in a way that cannot be overridden at command line -------------------------------------+------------------------------------- Reporter: joeyhess | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 (LLVM) | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- I would expect -O2 -optlo-O2 to pass -O2 to the llvm optimiser. However, it seems that -O2 implies -optlo-O3, overriding the command-line's -optlo-O2. The workaround seems to be to use -O1 -optlo-O2, but of course this misses some ghc optimizations. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14821 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14821: -O2 forces -optlo-O3 in a way that cannot be overridden at command line -------------------------------------+------------------------------------- Reporter: joeyhess | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler (LLVM) | Version: 8.0.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4421 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => patch * differential: => Phab:D4421 Comment: I suspect that Phab:D4421 will resolve this although I haven't yet tested it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14821#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#14821: -O2 forces -optlo-O3 in a way that cannot be overridden at command line
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Reporter: joeyhess | Owner: (none)
Type: bug | Status: patch
Priority: normal | Milestone:
Component: Compiler (LLVM) | Version: 8.0.2
Resolution: | Keywords:
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D4421
Wiki Page: |
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Comment (by Ben Gamari
#14821: -O2 forces -optlo-O3 in a way that cannot be overridden at command line -------------------------------------+------------------------------------- Reporter: joeyhess | Owner: (none) Type: bug | Status: closed Priority: normal | Milestone: 8.6.1 Component: Compiler (LLVM) | Version: 8.0.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4421 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: patch => closed * resolution: => fixed * milestone: => 8.6.1 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14821#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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