feat: add WAMR WebAssembly engine support for Halide JIT

cmake/vcpkg/wamr/portfile.cmake

@@ -0,0 +1,21 @@
+vcpkg_check_linkage(ONLY_STATIC_LIBRARY)
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO bytecodealliance/wasm-micro-runtime
+    REF 8c18e3f68b16c4bcaf05996b2636f6ed2b4cf629  # WAMR-2.4.4
+    SHA512 2378ab44e6ea3cd9bfede86a413c5d5503b8cd0d072bbee7099bd149897a58d74b57c06214f6b163242f5ac8bcdbb81a59632016ebd4c12a717786e1c387c9e3
+    PATCHES remove-fetchcontent.patch
+)
+
+vcpkg_cmake_configure(SOURCE_PATH "${SOURCE_PATH}")
+
+vcpkg_cmake_install()
+vcpkg_cmake_config_fixup(PACKAGE_NAME iwasm CONFIG_PATH lib/cmake/iwasm)
+
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")
+
+file(REMOVE_RECURSE
+     "${CURRENT_PACKAGES_DIR}/debug/include"
+     "${CURRENT_PACKAGES_DIR}/debug/share"
+)

cmake/vcpkg/wamr/remove-fetchcontent.patch

@@ -0,0 +1,19 @@
+diff --git a/core/iwasm/libraries/simde/simde.cmake b/core/iwasm/libraries/simde/simde.cmake
+--- a/core/iwasm/libraries/simde/simde.cmake
++++ b/core/iwasm/libraries/simde/simde.cmake
+@@ -15,14 +15,5 @@ add_definitions (-DWASM_ENABLE_SIMDE=1)
+
+ include_directories(${LIB_SIMDE_DIR} ${LIB_SIMDE_DIR}/simde)
+
+-include(FetchContent)
+-
+-FetchContent_Declare(
+-    simde
+-    GIT_REPOSITORY  https://github.com/simd-everywhere/simde
+-    GIT_TAG v0.8.2
+-)
+-
+-message("-- Fetching simde ..")
+-FetchContent_MakeAvailable(simde)
++find_path(simde_SOURCE_DIR simde/wasm/simd128.h)
+ include_directories("${simde_SOURCE_DIR}")

cmake/vcpkg/wamr/vcpkg.json

@@ -0,0 +1,18 @@
+{
+  "name": "wamr",
+  "version-semver": "2.4.4",
+  "description": "WebAssembly Micro Runtime (WAMR)",
+  "homepage": "https://github.com/bytecodealliance/wasm-micro-runtime",
+  "license": "Apache-2.0",
+  "dependencies": [
+    "simde",
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ]
+}

doc/BuildingHalideWithCMake.md

@@ -150,6 +150,7 @@ building the core pieces of Halide.
 | [flatbuffers] | `~=23.5.26`        | `WITH_SERIALIZATION=ON`    |                                                     |
 | [wabt]        | `==1.0.39`         | `Halide_WASM_BACKEND=wabt` | Does not have a stable API; exact version required. |
 | [V8]          | trunk              | `Halide_WASM_BACKEND=V8`   | Difficult to build. See [WebAssembly.md]            |
+| [WAMR]        | `>=2.4.3`          | `Halide_WASM_BACKEND=WAMR` | Built natively as static library from source.       |
 | [Python]      | `>=3.10`           | `WITH_PYTHON_BINDINGS=ON`  |                                                     |
 | [pybind11]    | `~=2.11.1`         | `WITH_PYTHON_BINDINGS=ON`  |                                                     |
 
@@ -454,9 +455,9 @@ apply when `WITH_TESTS=ON`:
 
 The following option selects the execution engine for in-process WASM testing:
 
-| Option                | Default | Description                                                                              |
-| --------------------- | ------- | ---------------------------------------------------------------------------------------- |
-| `Halide_WASM_BACKEND` | `wabt`  | Select the backend for WASM testing. Can be `wabt`, `V8` or a false value such as `OFF`. |
+| Option                | Default | Description                                                                                      |
+| --------------------- | ------- | ------------------------------------------------------------------------------------------------ |
+| `Halide_WASM_BACKEND` | `wabt`  | Select the backend for WASM testing. Can be `wabt`, `V8`, `WAMR` or a false value such as `OFF`. |
 
 ## Installing
 
@@ -614,5 +615,6 @@ On this test system (an M3 MacBook Pro), the build is three times faster, with a
 [venv]: https://docs.python.org/3/tutorial/venv.html
 [vs-cmake-docs]: https://docs.microsoft.com/en-us/cpp/build/cmake-projects-in-visual-studio
 [wabt]: https://github.com/WebAssembly/wabt
+[wamr]: https://github.com/bytecodealliance/wasm-micro-runtime
 [webassembly.md]: ./WebAssembly.md
 [winget]: https://learn.microsoft.com/en-us/windows/package-manager/winget/

src/CMakeLists.txt

@@ -580,7 +580,7 @@ target_compile_definitions(Halide PUBLIC
 
 set(Halide_WASM_BACKEND "wabt"
     CACHE STRING "Which backend to use for Halide's WASM testing.")
-set_property(CACHE Halide_WASM_BACKEND PROPERTY STRINGS "wabt;V8;OFF")
+set_property(CACHE Halide_WASM_BACKEND PROPERTY STRINGS "wabt;V8;WAMR;OFF")
 
 if (MSVC AND Halide_WASM_BACKEND STREQUAL "wabt")
     message(WARNING "wabt is not yet supported on Windows")
@@ -591,13 +591,20 @@ if (Halide_WASM_BACKEND STREQUAL "wabt")
     find_package(wabt REQUIRED)
     _Halide_pkgdep(wabt)
 
-    target_link_libraries(Halide PRIVATE wabt::wabt)
     target_compile_definitions(Halide PRIVATE WITH_WABT)
+    target_link_libraries(Halide PRIVATE wabt::wabt)
 elseif (Halide_WASM_BACKEND STREQUAL "V8")
     find_package(V8 REQUIRED)
     _Halide_pkgdep(V8)
+
     target_compile_definitions(Halide PRIVATE WITH_V8)
     target_link_libraries(Halide PRIVATE V8::V8)
+elseif (Halide_WASM_BACKEND STREQUAL "WAMR")
+    find_package(iwasm REQUIRED)
+    _Halide_pkgdep(iwasm)
+
+    target_compile_definitions(Halide PRIVATE WITH_WAMR)
+    target_link_libraries(Halide PRIVATE iwasm::vmlib)
 elseif (Halide_WASM_BACKEND)
     message(FATAL_ERROR "Unknown Halide_WASM_BACKEND `${Halide_WASM_BACKEND}`")
 endif ()