#8372: enable -dcmm-lint by default for .cmm input files ------------------------------------+------------------------------------- Reporter: rwbarton | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.7 Keywords: | Operating System: Unknown/Multiple Architecture: Unknown/Multiple | Type of failure: None/Unknown Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ------------------------------------+------------------------------------- I'm finding it's quite easy to write `.cmm` files with subtle errors that cause ghc to emit code that wasn't what I wanted! For example, I wrote a comparison between two arguments of different integer sizes and the code generator picked the wrong size. After tracking down the bug, I tried `-dcmm-lint` and it caught my error right away. It makes sense not to have `-dcmm-lint` enabled by default for Cmm produced from Stg, but I've seen here on the GHC wiki that `-dcmm-lint` is advised for hand-written `.cmm` files. But `integer-gmp`, and probably many other packages, don't build `.cmm` files with `-dcmm-lint`. Is there a reason we can't/shouldn't just make it the default? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8372 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler