iree-org · Alex-Wengg · Jun 19, 2026 · Jun 19, 2026
@@ -42,7 +42,6 @@
 
 # llvm-external-projects
 /llvm-external-projects/ @stellaraccident
-/llvm-external-projects/iree-dialects/ @MaheshRavishankar
 
 # Other Top-Level Directories
 /docs/ @ScottTodd

@@ -61,8 +61,6 @@ jobs:
           # (For now) QEMU is required to run tests with SME
           IREE_ARM_SME_QEMU_AARCH64_BIN: /usr/bin/qemu-aarch64
         run: ./build_tools/cmake/ctest_all.sh "${BUILD_DIR}"
-      - name: Test iree-dialects
-        run: ./build_tools/cmake/test_iree_dialects.sh "${BUILD_DIR}"
 
       - name: Post to Discord on Failure
         uses: sarisia/actions-status-discord@eb045afee445dc055c18d3d90bd0f244fd062708 # v1.16.0

@@ -41,7 +41,5 @@ jobs:
         run: ./build_tools/cmake/ctest_all.sh "${BUILD_DIR}"
         env:
           CTEST_PARALLEL_LEVEL: 32
-      - name: Test iree-dialects
-        run: ./build_tools/cmake/test_iree_dialects.sh "${BUILD_DIR}"
 
       # Alerting on failure is the responsibility of the calling job.
diff --git a/.gitignore b/.gitignore
@@ -102,9 +102,6 @@ artifacts/
 # VS Code DevContainer
 .devcontainer/docker-compose.yml
 
-# Local cache files
-llvm-external-projects/iree-dialects/.cache
-
 # pkgci artifacts
 artifacts/
 

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -942,11 +942,6 @@ else()
 
   # Add external projects.
 
-  message(STATUS "Configuring llvm-external-projects/mlir-iree-dialects")
-  list(APPEND CMAKE_MESSAGE_INDENT "  ")
-  iree_llvm_add_external_project(mlir-iree-dialects ${CMAKE_CURRENT_SOURCE_DIR}/llvm-external-projects/iree-dialects)
-  list(POP_BACK CMAKE_MESSAGE_INDENT)
-
   if(IREE_INPUT_STABLEHLO)
     message(STATUS "Configuring third_party/stablehlo")
     list(APPEND CMAKE_MESSAGE_INDENT "  ")

@@ -225,10 +225,6 @@ def _convert_iree_cuda_target(self, target):
         label = target.rsplit(":")[-1]
         return [f"iree_cuda::{label}"]
 
-    def _convert_iree_dialects_target(self, target):
-        # Just take the target name as-is.
-        return [target.rsplit(":")[-1]]
-
     def _convert_to_cmake_path(self, bazel_path_fragment: str) -> str:
         cmake_path = bazel_path_fragment
         # Bazel `//iree/base`     -> CMake `iree::base`
@@ -282,8 +278,6 @@ def convert_target(self, target):
 
     def _convert_iree_core_target(self, target):
         iree_core_repo = self._repo_alias("@iree_core")
-        if target.startswith(f"{iree_core_repo}//llvm-external-projects/iree-dialects"):
-            return self._convert_iree_dialects_target(target)
 
         # IREE root paths map to package names based on explicit rules.
         #   * src/iree/ directories (compiler/src/iree/ and runtime/src/iree/)

@@ -124,8 +124,4 @@ ctest \
   --label-exclude "${label_exclude_regex}"
 echo "::endgroup::"
 
-echo "::group::Running llvm-external-projects tests"
-cmake --build . --target check-iree-dialects -- -k 0
-echo "::endgroup::"
-
 popd
@@ -82,7 +82,3 @@ export IREE_HIP_DISABLE=1
 echo "::group::Running tests"
 build_tools/cmake/ctest_all.sh "${BUILD_DIR}"
 echo "::endgroup::"
-
-echo "::group::Running llvm-external-projects tests"
-cmake --build "${BUILD_DIR?}" --target check-iree-dialects -- -k 0
-echo "::endgroup::"
diff --git a/compiler/bindings/python/CMakeLists.txt b/compiler/bindings/python/CMakeLists.txt
@@ -32,7 +32,6 @@ set(_PYTHON_INSTALL_PREFIX "python_packages/iree_compiler")
 include_directories(
   "${IREE_SOURCE_DIR}/compiler/src"
   "${IREE_SOURCE_DIR}/compiler/bindings/c"
-  "${IREE_SOURCE_DIR}/llvm-external-projects/iree-dialects/include"
   "${IREE_SOURCE_DIR}/third_party/llvm-project/mlir/include"
   "${IREE_SOURCE_DIR}/third_party/stablehlo/include"
   "${IREE_SOURCE_DIR}/third_party/stablehlo"
@@ -260,10 +259,6 @@ set(_SOURCE_COMPONENTS
   MLIRPythonSources.Dialects.transform.interpreter
   MLIRPythonSources.Dialects.vector
   MLIRPythonSources.Dialects.vector_transform
-
-  # iree-dialects project.
-  IREEDialectsPythonExtensions
-  IREEDialectsPythonSources
 )
 
 add_mlir_python_modules(IREECompilerPythonModules

diff --git a/compiler/setup.py b/compiler/setup.py
@@ -503,9 +503,6 @@ def find_git_submodule_revision(submodule_path):
     },
     ext_modules=[
         CMakeExtension("iree.compiler._mlir_libs._mlir", py_limited_api=_is_abi3_build),
-        CMakeExtension(
-            "iree.compiler._mlir_libs._ireeDialects", py_limited_api=_is_abi3_build
-        ),
         # TODO: MHLO has been broken for a while so disabling. If re-enabling,
         # it also needs to be enabled on the build side.
         # CMakeExtension("iree.compiler._mlir_libs._mlirHlo"),

@@ -30,11 +30,9 @@ A few paths of interest include:
 Noteworthy compiler components _not_ included here include:
 
 ```
-├── compiler/plugins/
-│   └── input/                 (Input dialect support plugins)
-│   └── target/                (HAL target backend plugins)
-└── llvm-external-projects/
-    └── iree-dialects/         (IREE dialects for other projects to target)
+└── compiler/plugins/
+    └── input/                 (Input dialect support plugins)
+    └── target/                (HAL target backend plugins)
 ```
 
 Additional input/target/etc. plugins may also be defined out-of-tree.

@@ -9,6 +9,5 @@ Compiler API
    tools.rst
    build.rst
    mlir.rst
-   iree_dialects.rst
    iree_input_dialect.rst
    mlir_dialects.rst
@@ -24,14 +24,13 @@ BUILD_DIR="${BUILD_DIR:-${REPO_ROOT}/build-docs}"
 source ${REPO_ROOT}/build_tools/cmake/setup_build.sh
 source ${REPO_ROOT}/build_tools/cmake/setup_ccache.sh
 
-# Build `iree-doc` and `iree-dialects-doc` CMake targets. This requires the LLVM
-# submodule and can take several minutes with an empty cache, as it builds
-# `iree-tblgen` and `mlir-tblgen`.
+# Build the `iree-doc` CMake target. This requires the LLVM submodule and can
+# take several minutes with an empty cache, as it builds `iree-tblgen` and
+# `mlir-tblgen`.
 cmake -G Ninja \
   -B "${BUILD_DIR}" "${REPO_ROOT}" \
   -DIREE_BUILD_DOCS=ON
 cmake --build "${BUILD_DIR}" --target iree-doc
-cmake --build "${BUILD_DIR}" --target iree-dialects-doc
 
 if (( IREE_USE_CCACHE == 1 )); then
   ccache --show-stats