[PATCH] [mips] [IAS] Refactor the function which checks for the availability of AT. NFC.

[Daniel Sanders]

I agree with changing the int's to unsigned but I think the re-factor is going in the wrong direction at the moment. Instead of partially inlining MipsAsmParser::getATReg() and having a predicate function with side effects (error messages), I'd instead either rename it getATRegIndex() to make it clear it's an index rather than an internal register number, or I'd move the getReg() call inside the function so that it does return an internal register number.


http://reviews.llvm.org/D8478

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