#8048: Register spilling produces ineffecient/highly contending code -------------------------------------+------------------------------------- Reporter: schyler | Owner: Type: bug | Status: new Priority: normal | Milestone: ⊥ Component: Compiler | Version: 7.6.3 Resolution: | Keywords: register Operating System: Unknown/Multiple | allocator spill Type of failure: Runtime | Architecture: Unknown/Multiple performance bug | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------- Changes (by schyler): * component: Compiler (NCG) => Compiler Comment: Actually simon, I was able to reproduce this with LLVM also and carter can confirm. Interestingly, when we fiddled with some flags like -march=native and such, llvm seemed to bandaid it somehow by using mmx where the rotation happened properly. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8048#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler