#16052: Core optimizations for memset on a small range -------------------------------------+------------------------------------- Reporter: andrewthad | Owner: (none) Type: task | Status: new Priority: normal | Milestone: 8.9 Component: Compiler | Version: 8.6.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by AndreasK): I'm happy to take a look once there is something to look at.
I don’t know how the NCG normally deals with the 32 bit vs 64 bit distinction in other places.
A lot of code is in the spirit of `is32Bit then foo32 else foo64`.
It’s probably difficult to add a better test for this once it’s fixed. It would need to compile starting with STG, not Cmm (which is what the current test does), and go all the way down to asm. But it might be brittle.
Brittle in what sense? Just grepping for calls to memset should be quite stable as far as making sure we don't emit calls like this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16052#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler