#10074: Implement the 'Improved LLVM Backend' proposal -------------------------------------+------------------------------------- Reporter: thoughtpolice | Owner: angerman Type: task | Status: new Priority: high | Milestone: 8.4.1 Component: Compiler (LLVM) | Version: Resolution: | Keywords: llvm, codegen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11295, #12470 | Differential Rev(s): Phab:D530 Wiki Page: | wiki:ImprovedLLVMBackend | -------------------------------------+------------------------------------- Comment (by George): One interesting option clang would give us is to specify -Os, which according to the clang man page is like the clang -O2 option but with extra optimizations to reduce code size. opt and llc don't seem to have that option. Of course this wouldn't help the ghc code gen but might help with clang as the -O3 option along with -Os would allow users to experiment with size/speeed tradeoffs. I have seen discussions about not doing certain optimizations as the code size would be increased and we were unsure if the result would be faster or not. OTOH I don't know very much and maybe all the important code size / speed tradeoffs are made before we get to llvm. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10074#comment:22 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler