llvm-project

06f03b80 - [RISCV][InsertVSETVLI] Check for undef register operand directly [nfc]

[RISCV][InsertVSETVLI] Check for undef register operand directly [nfc] getVNInfoFromReg is expected to return a nullptr if-and-only-if the operand is undef. (This was asserted for.) Reverse the order of the checks to simplify an upcoming set of patches.