Where is the implementation of `dividedReportingOverflow`?

[Nevin]

@xwu

IntegerTypes.swift.gyb does contain the concrete implementation of all standard library fixed-width integer types: you have to scroll past the documentation. Just search "ReportingOverflow" in that file.

Ah, thanks, I made the classic mistake of searching for the name of the method I wanted to find. How silly of me.

@xwu

Unless I'm mistaken, there is nothing about the implementation in that file which can solve SR-5964. The correct constant folding of the existing implementation should give (0, true) (or whatever the appropriate value is) instead of attempting to divide, so it's a constant folding bug.

Hmm, I don’t understand this. The very first thing the implementation does is check:

if _slowPath(other == (0 as ${Self})) {
  return (partialValue: self, overflow: true)
}

How on earth does the compiler not simply inline this result when it sees a known-constant 0 as the argument?