llvm-project

07161a3f - [RISCV] Return NoMatch if register list does not start with a curly brace.

[RISCV] Return NoMatch if register list does not start with a curly brace. This way we emit the error message that explains the full syntax for a register list. parseZcmpStackAdj had to be modified to not assume the previous operand had been successfully parsed as a register list.