Handle up to 2^16 - 1 operands per inst, and error properly on more.#226

cfallin merged 1 commit intobytecodealliance:mainbytecodealliance/regalloc2:mainfrom

cfallin:handle-too-many-operands-and-support-more-of-themcfallin/regalloc2:handle-too-many-operands-and-support-more-of-themCopy head branch name to clipboard