diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 420ca21..a599e97 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,11 +17,26 @@ jobs:
       - name: Build object files
         run: bash tools/crosscompile.sh
 
+      - name: Generate debug asm files
+        run: |
+          bash tools/inspect.sh
+          echo '<p>test.copapy.asm</p><pre>' >> $GITHUB_STEP_SUMMARY
+          echo bin/test.copapy.asm >> $GITHUB_STEP_SUMMARY
+          echo '</pre>' >> $GITHUB_STEP_SUMMARY
+          echo '<p>stencils_x86_64_O3.asm</p><pre>' >> $GITHUB_STEP_SUMMARY
+          echo bin/stencils_x86_64_O3.asm >> $GITHUB_STEP_SUMMARY
+          echo '</pre>' >> $GITHUB_STEP_SUMMARY
+
       - uses: actions/upload-artifact@v4
         with:
           name: stencil-object-files
           path: src/copapy/obj/*.o
 
+      - uses: actions/upload-artifact@v4
+        with:
+          name: inspect-asm-files
+          path: bin/*.asm
+
   build-ubuntu:
     needs: [build_stencils]
     runs-on: ubuntu-latest
diff --git a/tests/test_compile.py b/tests/test_compile.py
index 695403f..6b37f91 100644
--- a/tests/test_compile.py
+++ b/tests/test_compile.py
@@ -55,7 +55,7 @@ def test_compile():
     il, variables = copapy.compile_to_instruction_list(out, copapy.generic_sdb)
 
     # run program command
-    #il.write_com(binwrite.Command.RUN_PROG)
+    il.write_com(binwrite.Command.RUN_PROG)
 
     for net in ret:
         copapy.add_read_command(il, variables, net)
@@ -72,8 +72,8 @@ def test_compile():
     print(result)
     print('--')
 
-    #assert 'Return value: 1' in result
-    assert 'END_COM' in result
+    assert 'Return value: 1' in result
+    #assert 'END_COM' in result
 
 
 if __name__ == "__main__":
diff --git a/tools/build.sh b/tools/build.sh
index 2ba301d..262ad3d 100644
--- a/tools/build.sh
+++ b/tools/build.sh
@@ -6,9 +6,10 @@ SRC=bin/stencils.c
 DEST=src/copapy/obj
 python tools/generate_stencils.py $SRC
 mkdir -p $DEST
-gcc -c $SRC -O0 -o $DEST/stencils_x86_64_O0.o
-gcc -c $SRC -O1 -o $DEST/stencils_x86_64_O1.o
-gcc -c $SRC -O2 -o $DEST/stencils_x86_64_O2.o
+gcc --version
+#gcc -c $SRC -O0 -o $DEST/stencils_x86_64_O0.o
+#gcc -c $SRC -O1 -o $DEST/stencils_x86_64_O1.o
+#gcc -c $SRC -O2 -o $DEST/stencils_x86_64_O2.o
 gcc -c $SRC -O3 -o $DEST/stencils_x86_64_O3.o
 
 mkdir bin -p