nightly

Commits

• eeaa870: WithAcc inputs are consumed inside the body. (Troels Henriksen)

0.25.22

Added

• futhark script now supports an -f option.

• futhark script now supports the builtin procedure $store.

Removed

Changed

Fixed

• An error in tuning file validation.

• Constant folding for loops that produce floating point results could
  result in different numerical behaviour.

• Compiler crash in memory short circuiting (#2176).

0.25.21

Added

• Logging now prints more GPU information on context initialisation.

• GPU cache size can now be configured (tuning param: default_cache).

• GPU shared memory can now be configured (tuning param: default_shared_memory).

• GPU register capacity can now be configured.

• futhark script now accepts a -b option for producing binary
  output.

Fixed

• Type names for element types of array indexing functions in C
  interface are now often better - although there are still cases
  where you end up with hashed names. (#2172)

• In some cases, GPU failures would not be reported properly if a
  previous failure was pending.

• auto output didn't work if the .fut file did not have any path
  components.

• Improved detection of malformed tuning files.

0.25.20

Added

• Better error message when in-place updates fail at runtime due to a
  shape mismatch.

Fixed

• #[unroll] on an outer loop now no longer causes unrolling of all
  loops nested inside the loop body.

• Obscure issue related to replications of constants in complex
  intrablock kernels.

• Interpreter no longer crashes on attributes in patterns.

• Fixes to array indexing through C API when using GPU backends.

0.25.19

Added

• The compiler now does slightly less aggressive inlining. Use the
  #[inline] attribute if you want to force inlining of some
  function.

• Arrays of opaque types now support indexing through the C API.
  Arrays of records can also be constructed. (#2082)

Fixed

• The opencl backend now always passes
  -cl-fp32-correctly-rounded-divide-sqrt to the kernel compiler, in
  order to match CUDA and HIP behaviour.

0.25.18

Added

• New prelude function: rep, an implicit form of replicate.

• Improved handling of large monomorphic single-dimensional array
  literals (#2160).

Fixed

• futhark repl no longer asks for confirmation on EOF.

• Obscure oversight related to abstract size-lifted types (#2120).

• Accidential exponential-time algorithm in layout optimisation for
  multicore backends (#2151).

0.25.17

• Faster device-to-device copies on CUDA.

• "More correctly" detect L2 cache size for OpenCL backend on AMD GPUs.

Fixed

• Handling of .. in import paths (again).

• Detection of impossible loop parameter sizes (#2144).

• Rare case where GPU histograms would use slightly too much shared
  memory and fail at run-time.

• Rare crash in layout optimisation.

0.25.16

Added

• futhark test: --no-terminal now prints status messages even when
  no failures occur.

• futhark test no longer runs structure tests by default. Pass
  -s to run them.

• Rewritten array layout optimisation pass by Bjarke Pedersen and
  Oscar Nelin. Minor speedup for some programs, but is more
  importantly a principled foundation for further improvements.

• Better error message when exceeding shared memory limits.

• Better dead code removal for the GPU representation (minor impact on
  some programs).

Fixed

• Bugs related to deduplication of array payloads in sum types.
  Unfortunately, fixed by just not deduplicating in those cases.

• Frontend bug related to turning size expressions into variables
  (#2136).

• Another exotic monomorphisation bug.

0.25.15

Added

• Incremental Flattening generates fewer redundant code versions.

• Better simplification of slices. (#2125)

Fixed

• Ignore type suffixes when unifying expressions (#2124).

• In the C API, opaque types that correspond to an array of an opaque
  type are now once again named futhark_opaque_arr_....

• cuda backend did not correctly profile CPU-to-GPU scalar copies.

0.25.14

Added

• The prelude definition of filter is now more memory efficient,
  particularly when the output is much smaller than the input. (#2109)

• New configuration for GPU backends:
  futhark_context_config_set_unified_memory, also available on
  executables as --unified-memory.

• The "raw" API functions now do something potentially useful, but are
  still considered experimental.

• futhark --version now reports GHC version.

Fixed

• Incorrect type checking of let-bound sizes occurring multiple times
  in pattern. (#2103).

• A concatenation simplification would sometimes mess up sizes.
  (#2104)

• Bug related to monomorphisation of polymorphic local functions
  (#2106).

• Rare crash in short circuiting.

• Referencing an unbound type parameter could crash the type checker
  (#2113, #2114).

• Futhark now works with GHC 9.8 (#2105).