0.26.4

Added

• futhark repl has a new command: :string.

• The hip backend previously simulated f16 operations with f32, but now it
  uses the hardware support for f16, similarly to the CUDA backend.
  Implemented by Jérôme Wagner. (#2470)

• Vector AD, exposed through the functions jmp and mjp.

• All opaque values available over the C API can now be decomposed into their
  constituents.

• The manifest now contains documentation for entry points and opaque types.

Fixed

• Non-exhaustive pattern match warnings were not always emitted when wildcard
  patterns and explicit constructors were mixed. (#2483)

• Invalid fusion that could cause compiler crash. (#2474)

• GPU code generation of segmented reductions with array operands. (#2227,
  properly this time, and #2482)

• Use ascripted element type in API functions for arrays of records. (#2485)

• Consumption checking of certain local polymorphic functions (in practice,
  polymorphic functions that can only be written via holes). (#2488)

• A regression in fusion of forms such as scatter dest (flatten inds) (flatten vals). (#2452)