tt-mlir build debugging

Author: brnorris03

.github/containers/cleanup-toolchain.sh

@@ -48,7 +48,7 @@ BINARIES_TO_STUB=(
     mlir-minimal-opt mlir-minimal-opt-canonicalize mlir-pdll
     mlir-query mlir-reduce mlir-rewrite mlir-runner mlir-transform-opt
     dsymutil sancov sanstats obj2yaml yaml2obj verify-uselistorder
-    yaml-bench flatc reduce-chunk-list run-clang-tidy.py
+    yaml-bench reduce-chunk-list run-clang-tidy.py
 )
 
 cd "$TOOLCHAIN_DIR/bin"

.github/workflows/call-build-ttmlir-toolchain.yml

@@ -51,6 +51,38 @@ permissions:
     contents: read
 
 jobs:
+    # TEMPORARY: Migrate existing toolchain cache to LLVM-only format
+    # Set if: true to run once, then remove this entire job
+    migrate-cache:
+        name: Migrate toolchain cache to LLVM-only
+        runs-on: ubuntu-latest
+        if: true  # TODO: Set to false or remove after running once
+        steps:
+            - name: Checkout
+              uses: actions/checkout@v4
+
+            - name: Determine tt-mlir commit
+              id: commit
+              run: |
+                  COMMIT=$(cat third-party/tt-mlir.commit | tr -d '[:space:]')
+                  echo "commit=$COMMIT" >> $GITHUB_OUTPUT
+
+            - name: Restore full toolchain cache
+              uses: actions/cache/restore@v4
+              with:
+                  path: ttmlir-toolchain
+                  key: Linux-ttlang-toolchain-v1-${{ steps.commit.outputs.commit }}
+                  fail-on-cache-miss: true
+
+            - name: Cleanup toolchain (create stubs)
+              run: .github/containers/cleanup-toolchain.sh ttmlir-toolchain
+
+            - name: Save as LLVM-only cache
+              uses: actions/cache/save@v4
+              with:
+                  path: ttmlir-toolchain
+                  key: Linux-ttlang-llvm-only-v1-${{ steps.commit.outputs.commit }}
+
     # First job: Check if caches exist (runs on standard runner)
     check-cache:
         name: Check toolchain cache
@@ -179,11 +211,6 @@ jobs:
                   echo "=== LLVM toolchain complete ==="
                   df -h
 
-            - name: Cleanup LLVM toolchain
-              run: |
-                  .github/containers/cleanup-toolchain.sh $TTMLIR_TOOLCHAIN_DIR
-                  df -h
-
             - name: Save LLVM-only cache
               uses: actions/cache/save@v4
               with:
@@ -249,10 +276,6 @@ jobs:
                   key: ${{ needs.check-cache.outputs.llvm-cache-key }}
                   fail-on-cache-miss: true
 
-            - name: Ensure LLVM stubs exist
-              run: |
-                  .github/containers/cleanup-toolchain.sh $TTMLIR_TOOLCHAIN_DIR
-
             - name: Build and install tt-lang (includes tt-mlir via FetchContent)
               run: |
                   .github/containers/build-and-install.sh \
@@ -264,6 +287,11 @@ jobs:
                       { echo "ERROR: TTMLIRConfig.cmake not found - tt-mlir install failed"; exit 1; }
                   echo "tt-mlir installed successfully"
 
+            - name: Cleanup toolchain (create stubs for unused binaries)
+              run: |
+                  .github/containers/cleanup-toolchain.sh $TTMLIR_TOOLCHAIN_DIR
+                  df -h
+
             - name: Save toolchain to cache
               uses: actions/cache/save@v4
               with: