message: quarantine safe-stack for now
diff: set -e
  # IPO passes aren't supported ATM
  +# safe-stack: introduces non-cost globals
  # place-safepoints: places new function calls (@do_safepoint)
  # loop-extract: extracts a top-level loop into a distinct function
  # extract-blocks: extract specified blocks into a distinct function
  # attributor, functionattrs: inter procedural pass that deduces and/or propagates attributes
  # metarenamer: anonymizes function names
  -PASSES="argpromotion deadargelim globalopt hotcoldsplit inline ipconstprop ipsccp mergefunc partial-inliner tbaa loop-extract extract-blocks place-safepoints attributor functionattrs metarenamer -Os -Oz -O1 -O2 -O3"
  +PASSES="argpromotion deadargelim globalopt hotcoldsplit inline ipconstprop ipsccp mergefunc partial-inliner tbaa loop-extract extract-blocks safe-stack place-safepoints attributor functionattrs metarenamer -Os -Oz -O1 -O2 -O3"
  TV="-tv"
  for p in $PASSES; do
  