STACKFRAME Skip stackframes. PEEPHOLE Peephole optimizations. ASMCSE Use common subexpression elimination at the assembler level. LOOPUNROLL Unroll loops TAILREC change tail recursion to regular while math operations REMOVEEMPTYPROCS remove calls to empty procedures. CSE Use common subexpression elimination DFA Use DFA (Data Flow Analysis). AUTOINLINE Try to automatically inline procedures where appropriate the common subexpression elimination (formerly called the "reloading optimizer") 5. Uncertain optimizations (-OoUNCERTAIN): With this switch, the common subexpression elimination algorithm can be forced

subexpression elimination at the assembler level (i386-only, depre- cated) LOOPUNROLL Unroll (small) loops TAILREC Change tail recursion to non-recursive loop CSE Common subexpression elimination DFA Enable