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2018 Dec 04
2
MC Assembler / tablegen: actually parsing variable_ops
...uts, but it seems that there aren't any targets for which this results in variable elements in the instruction encoding (and thus in assembler parsing), since the tablegen generated assembly matcher ($(Target)GenAsmMatcher.inc) simply assumes that variable_ops are not to be parsed (match table: Convert_NoOperands). Now I understand that a variable length instruction is a weird concept for most CPUs, but we need it for at least one instruction in WebAssembly. We can probably hack around it in the WebAssemblyAsmParser, but I wonder if there's something I am not understanding about variable_ops and the g...