search for: match_missingfeatur

...2: error: instruction requires: distinct-ops sllk %r2,%r3,1 ^ This is because MatchOperandParserImpl() skips custom parsers if the subtarget feature isn't enabled, so the instruction is parsed using the default operand parser instead. Then MatchInstructionImpl() only returns Match_MissingFeature if an otherwise good match is found, which in my case requires the custom parser to be used. ARM seems to rely on the current MatchOperandParserImpl() behaviour, so I'm not going to suggest changing it unconditionally. But on SystemZ there aren't any cases where the choice of parse routi...