diff --git a/debian/qualify-clang.sh b/debian/qualify-clang.sh
index f9208af4..d229f073 100755
--- a/debian/qualify-clang.sh
+++ b/debian/qualify-clang.sh
@@ -1011,23 +1011,23 @@ int main()
     return 0;
 }
 " > foo.c
-#clang-$VERSION -O3 -mllvm -polly -mllvm -polly-parallel -lgomp  foo.c
+clang-$VERSION -O3 -mllvm -polly -mllvm -polly-parallel -lgomp  foo.c
 # Comment because of https://bugs.llvm.org/show_bug.cgi?id=43164
 #clang-$VERSION -O3 -mllvm -polly -mllvm -lgomp -polly-parallel foo.c
-#clang-$VERSION -O3 -mllvm -polly -mllvm -polly-vectorizer=stripmine foo.c
-#clang-$VERSION -S -fsave-optimization-record -emit-llvm foo.c -o matmul.s
-#opt-$VERSION -S -polly-canonicalize matmul.s > matmul.preopt.ll > /dev/null
-#opt-$VERSION -basicaa -polly-ast -analyze -q matmul.preopt.ll -polly-process-unprofitable > /dev/null
-#if test ! -f /usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py; then
-#    echo "Install llvm-$VERSION-tools"
-#    exit 42
-#fi
-#/usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py -source-dir .  matmul.opt.yaml -o ./output > /dev/null
+clang-$VERSION -O3 -mllvm -polly -mllvm -polly-vectorizer=stripmine foo.c
+clang-$VERSION -S -fsave-optimization-record -emit-llvm foo.c -o matmul.s
+opt-$VERSION -S -polly-canonicalize matmul.s > matmul.preopt.ll > /dev/null
+opt-$VERSION -basicaa -polly-ast -analyze -q matmul.preopt.ll -polly-process-unprofitable > /dev/null
+if test ! -f /usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py; then
+    echo "Install llvm-$VERSION-tools"
+    exit 42
+fi
+/usr/lib/llvm-$VERSION/share/opt-viewer/opt-viewer.py -source-dir .  matmul.opt.yaml -o ./output > /dev/null
 
-#if ! grep -q "not inlined into" output/foo.c.html 2>&1; then
-#    echo "Could not find the output from polly"
-#    exit -1
-#fi
+if ! grep -q "not inlined into" output/foo.c.html 2>&1; then
+    echo "Could not find the output from polly"
+    exit -1
+fi
 
 echo "
 int foo(int x, int y) __attribute__((always_inline));