#7942: aarch64 support in ghc --------------------------------------------+--------------------------- Reporter: jcapik | Owner: kgardas Type: feature request | Status: new Priority: normal | Milestone: 7.10.1 Component: Compiler | Version: 7.6.3 Resolution: | Keywords: Operating System: Linux | Architecture: arm Type of failure: GHC doesn't work at all | Difficulty: Unknown Test Case: | Blocked By: 7623 Blocking: | Related Tickets: --------------------------------------------+--------------------------- Comment (by kgardas): Replying to [comment:13 carter]:

sounds reasonable. Will the arm 32 bit ghc calling convention make sense for AArch64? We may need to get a patch into llvm before having a distinct aarch64 abi. (and we should probably do some pretty thorough benchmarking before picking any such ABI)

Not at all! aarch64 abi is completely different with completely different (or better nicely extended) register stack! So basically aarch64 is completely different beast than arm and I'm also doing it separately instead of extending current arm support. W.r.t. benchmarking, I've also had such discussion with David few year ago, but then Stephen comes with work done so no benchmarking was done. The point is to find some sweet-spot inbetween using callee-saved regs for STG regs pinning and between leaving them for LLVM business usage... Anyway, as I said, we're not there yet, although I already do have some code here. The problem is LLVM/AArch64 is not there yet as you can see from my bug report here: http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-January/069248.html and that is just unregisterised build... -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/7942#comment:14 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler