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Hello. I am curious why did you changed TableGen to allow in principle only writing ASM instructions in prefix notation. I ask because I personally use an assembly notation that is infix (I could use a simple preprocessor that changes prefix to infix). Just to mention: I found the solution to this - the following part of the code is responsible for this from

Dear all, I have written an assembler which reads assembly instructions and produces the equivalent binary. I have a problem. Although I set the bit range and immediate type for an instruction like add which accepts a register and an immediate value, I can simply overflow that value and llvm/tablegen doesn't care! for example for a i8imm imm value (bits<8> val) these two produce the