[LLVMdev] why llvm does not have uadd, iadd node

[Tim Northover]

Hi Kevin,

On 17 February 2015 at 10:41, kewuzhang <kewu.zhang at amd.com> wrote:
> I just noticed that the LLVM has some node for signed/unsigned type( like udiv, sdiv), but why the ADD, SUB do not have the counter part sadd, uadd?

That's because in 2s complement arithmetic the bit pattern of the
result doesn't depend on whether the operation is signed (unlike
multiplication & division).

Cheers.

Tim.