#9125: int-to-float conversion broken on ARM -------------------------------------+------------------------------------- Reporter: Ansible | Owner: Type: bug | Status: infoneeded Priority: highest | Milestone: 7.8.4 Component: Compiler | Version: 7.8.3 Resolution: | Keywords: Operating System: | Architecture: arm Unknown/Multiple | Difficulty: Unknown Type of failure: Incorrect | Blocked By: result at runtime | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by rwbarton): * status: new => infoneeded Comment: I think that something is reordering the assignment to R1 with the call to `__decodeFloat_Int`. After all, R1 is supposed to receive the value that ends up at `Sp[-4]`, which is set to F1 at the top of the function. Not sure whether GHC or LLVM is doing this incorrect reordering. It would be informative to * build the broken GHC * `rm rts/dist/build/PrimOps.o` * run `make` again and copy the command used to build `rts/dist/build/PrimOps.o` * rerun the command with `-v -keep-tmp-files -ddump-cmm -ddump-to-file` * find the files `rts/PrimOps.dump-cmm` and `/tmp/ghc*/ghc*.ll` and attach them to this ticket -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9125#comment:10 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler