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2015 Dec 07
2
Immediate value boundary checking
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