Delegate IREE source fetching to shortfin/CMakeLists.txt. (#762)

This simplification will help with
#760.

Pros:

* Now there are fewer places that use a ref pin
* Workflows are now simpler

Cons: 

* ~~Workflows will be several seconds slower since FetchContent always
fetches all submodules~~
* The `SHORTFIN_IREE_SOURCE_DIR` option is no longer tested

Author: ScottTodd

.github/workflows/ci-libshortfin.yml

@@ -25,7 +25,6 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  IREE_REPO_DIR: ${{ github.workspace }}/iree
   LIBSHORTFIN_DIR: ${{ github.workspace }}/shortfin/
 
 jobs:
@@ -95,23 +94,6 @@ jobs:
       with:
         toolchain: stable
 
-    - name: Checkout IREE repo
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      with:
-        repository: iree-org/iree
-        path: ${{ env.IREE_REPO_DIR }}
-        submodules: false
-        ref: iree-3.1.0rc20241220
-
-    - name: Initalize IREE submodules
-      working-directory: ${{ env.IREE_REPO_DIR }}
-      run : |
-        git submodule update --init --depth 1 -- third_party/benchmark
-        git submodule update --init --depth 1 -- third_party/cpuinfo/
-        git submodule update --init --depth 1 -- third_party/flatcc
-        git submodule update --init --depth 1 -- third_party/googletest
-        git submodule update --init --depth 1 -- third_party/hip-build-deps/
-
     - name: "Setup Python ${{ matrix.python-version }}"
       uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5.3.0
       with:
@@ -134,7 +116,6 @@ jobs:
         cmake -GNinja \
           -S. \
           -Bbuild \
-          -DSHORTFIN_IREE_SOURCE_DIR="${{ env.IREE_REPO_DIR }}" \
           -DSHORTFIN_BUILD_PYTHON_BINDINGS=ON \
           ${{matrix.cmake-options}}
         cmake --build build --target all

.github/workflows/ci_linux_x64_asan-libshortfin.yml

@@ -36,7 +36,6 @@ env:
   PYTHON_VER: 3.12.7
   CACHE_ASAN_VER: 2
   CACHE_DEPS_VER: 1
-  IREE_SOURCE_DIR: ${{ github.workspace }}/iree
   LIBSHORTFIN_DIR: ${{ github.workspace }}/shortfin/
 
 jobs:
@@ -100,23 +99,6 @@ jobs:
         sudo apt update
         sudo apt install clang lld cmake ninja-build
 
-    - name: Checkout IREE repo
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      with:
-        repository: iree-org/iree
-        path: ${{ env.IREE_SOURCE_DIR }}
-        submodules: false
-        ref: iree-3.1.0rc20241220
-
-    - name: Initalize IREE submodules
-      working-directory: ${{ env.IREE_SOURCE_DIR }}
-      run : |
-        git submodule update --init --depth 1 -- third_party/benchmark
-        git submodule update --init --depth 1 -- third_party/cpuinfo/
-        git submodule update --init --depth 1 -- third_party/flatcc
-        git submodule update --init --depth 1 -- third_party/googletest
-        git submodule update --init --depth 1 -- third_party/hip-build-deps/
-
     - name: Restore Python dependencies cache
       id: cache-python-deps-restore
       uses: actions/cache/restore@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
@@ -157,7 +139,6 @@ jobs:
       working-directory: ${{ env.LIBSHORTFIN_DIR }}
       run: |
         eval "$(pyenv init -)"
-        SHORTFIN_IREE_SOURCE_DIR="${{ env.IREE_SOURCE_DIR }}" \
         SHORTFIN_ENABLE_ASAN=ON \
         SHORTFIN_DEV_MODE=ON \
         SHORTFIN_RUN_CTESTS=ON \

.github/workflows/ci_linux_x64_nogil-libshortfin.yml

@@ -32,7 +32,6 @@ concurrency:
   cancel-in-progress: true
 
 env:
-  IREE_REPO_DIR: ${{ github.workspace }}/iree
   LIBSHORTFIN_DIR: ${{ github.workspace }}/shortfin/
 
 jobs:
@@ -48,23 +47,6 @@ jobs:
         sudo apt update
         sudo apt install clang lld cmake ninja-build
 
-    - name: Checkout IREE repo
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      with:
-        repository: iree-org/iree
-        path: ${{ env.IREE_REPO_DIR }}
-        submodules: false
-        ref: iree-3.1.0rc20241220
-
-    - name: Initalize IREE submodules
-      working-directory: ${{ env.IREE_REPO_DIR }}
-      run : |
-        git submodule update --init --depth 1 -- third_party/benchmark
-        git submodule update --init --depth 1 -- third_party/cpuinfo/
-        git submodule update --init --depth 1 -- third_party/flatcc
-        git submodule update --init --depth 1 -- third_party/googletest
-        git submodule update --init --depth 1 -- third_party/hip-build-deps/
-
     - name: Setup Python
       uses: deadsnakes/action@e640ac8743173a67cca4d7d77cd837e514bf98e8 # v3.2.0
       with:
@@ -87,7 +69,6 @@ jobs:
           -DCMAKE_CXX_COMPILER=clang++-18 \
           -DCMAKE_LINKER_TYPE=LLD \
           -DSHORTFIN_BUNDLE_DEPS=ON \
-          -DSHORTFIN_IREE_SOURCE_DIR="${{ env.IREE_REPO_DIR }}" \
           -DSHORTFIN_BUILD_PYTHON_BINDINGS=ON
         cmake --build build --target all
         pip install -v -e build/

shortfin/CMakeLists.txt

@@ -44,6 +44,7 @@ add_compile_options("$<$<C_COMPILER_ID:MSVC>:/utf-8>")
 add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")
 
 # Pins
+# Keep in sync with requirements-iree-compiler.txt.
 set(SHORTFIN_IREE_GIT_TAG "iree-3.1.0rc20241220")
 
 # build options

shortfin/requirements-iree-compiler.txt

@@ -1,4 +1,4 @@
-# Keep in sync with "ref: iree-" in .github/workflows/* and GIT_TAG in CMakeLists.txt
+# Keep in sync with SHORTFIN_IREE_GIT_TAG in CMakeLists.txt
 -f https://iree.dev/pip-release-links.html
 iree-base-compiler==3.1.0rc20241204
 iree-base-runtime==3.1.0rc20241204