#15126: Opportunity to compress common info table representation. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: (none) Type: task | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler | Version: 8.2.2 Resolution: | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4632 Wiki Page: | -------------------------------------+------------------------------------- Comment (by AndreasK): I've collected some rudimentary stats by analysing the assembly dump for nofib/spectral/Simple. Out of 2233 info tables, the most common three make up 370, with the most common case making up 240 of them. I think that case is the small function return (RET_SMALL) with no pointers on the stack: {{{ .align 8 .quad 0 .long 30 .long 0 block_cD9R_info: }}} But shrinking this further would give up the common info table layout. So hard to judge the complexity and cost of this. For now just documenting this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15126#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler