-fno-caller-saves
-fno-cse-follow-jumps
-fno-cse-skip-blocks
-fno-expensive-optimizations
-fno-force-mem
-fno-gcse
-fno-optimize-register-move
-fno-regmove
-fno-rerun-cse-after-loop
-fno-rerun-loop-opt
-fno-schedule-insns2
-fno-strength-reduce
