-# --no-clean: don't make clean first, just carry on from
-# a previous interrupted validation run
-# --testuite-only: don't build the compiler, just run
-# the test suite
+# --no-clean: don't make clean first, just carry on from
+# a previous interrupted validation run
+# --testsuite-only: don't build the compiler, just run
+# the test suite
+# --hpc: build stage2 with -fhpc, and see how much of the
+# compiler the test suite covers