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A previous commit added inline functions that provide fast(er) and correct overflow checks for signed integer math. Use them in a significant portion of backend code. There's more to touch in both backend and frontend code, but these were the easily identifiable cases. The old overflow checks are noticeable in integer heavy workloads. A secondary benefit is that getting rid of overflow checks that rely on signed integer overflow wrapping around, will allow us to get rid of -fwrapv in the future. Which in turn slows down other code. Author: Andres Freund Discussion: https://postgr.es/m/20171024103954.ztmatprlglz3rwke@alap3.anarazel.de |
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