halide/Halide v13.0.0

Halide 13.0.0

on GitHub

We are pleased to announce the release of Halide 13.0.0!

This is a major release. Most notably, Halide now requires C++17 (or higher).

You can download one of our binary releases here, or check one of the following package repositories (they might take some time to be updated):

• Vcpkg: https://github.com/microsoft/vcpkg/tree/master/ports/halide
• Homebrew: https://formulae.brew.sh/formula/halide

Language and Compiler

• The compiler now requires C++17 or higher. (#5282)
• Overloads of realize() that were deprecated in Halide 12 are now removed. (#6122, #6162)
• Added new predicated tail strategies for split loops. (#6126)
• Added a more fine-grained prefetch directive. (#6155)
• Compiler now always runs in a separate 32MB stack on all platforms. (#6239)
• Fixed a semantics bug where data-dependent loads might be uninitialized on over-compute. (#6294)
• Using MemoryType::Stack may now trigger a real stack allocation for dynamically-sized allocations discovered to be small at runtime (#6289)

Backends

• Simplifier improvements saw a >10% reduction in peak memory usage in many apps, including camera_pipe, harris, nl_means, and stencil_chain. (#6174)
• The ARM backend now supports native 16-bit float instructions (#6102)
• Division by non-power-of-two unsigned constants is now faster on X86 (#6322)
• The WebAssembly backend is mature enough for significant production use (See https://web.dev/ps-on-the-web/)

Build

• Fixed an issue with add_halide_library on Xcode, which requires at least one source file for every target. (#6175)
• Added a watchdog timer to the Halide generator executables (i.e. GenGen.cpp). (#6184, #6240)
• Fixed a missing dependency on Threads::Threads in CMake (#6257)
• The tutorials and readmes are now packaged to the doc dir. The documentation has been moved one level deeper to share/doc/Halide/html (#6267)