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I think your users will be very upset if you don't set the boolean return value correctly :-) Whatever work it takes to determine the correct value for it, if the user code doesn't need/use that value then the dead code will be eliminated later. But if they need that return flag then they will want it to be correct! You may need to use a multiply instruction that returns a

Hi All, While compiling libgcc, I find I have to deal with UMULO (overflow-aware unsigned multiplication) SDNode. UMULO returns the result of multiplication, and a boolean indicating overflow occurred or not. Our target's multiply instruction doesn't care (detect) overflow. I am wondering if I can always set the boolean to false. I am not sure about this as I see AArch64 [1] seems

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