// ADJCALLSTACKDOWN/UP implicitly use/def ESP because they may be expanded into
// a stack adjustment and the codegen must know that they may modify the stack
// pointer before prolog-epilog rewriting occurs.
-// Pessimisively assume ADJCALLSTACKDOWN / ADJCALLSTACKUP will become sub / add
+// Pessimistically assume ADJCALLSTACKDOWN / ADJCALLSTACKUP will become sub / add
// which can clobber EFLAGS.
let Defs = [ESP, EFLAGS], Uses = [ESP] in {
def ADJCALLSTACKDOWN : I<0, Pseudo, (outs), (ins i32imm:$amt), "#ADJCALLSTACKDOWN",