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relates to:

• SR-1217 Wrong value after optimizations on Xcode 7.3 / Swift 2.2

Issue Description:

Given the following struct:

struct SimpleRecord {
    
    let id:Int64
    let name:String
    
    init(name:String) {
        self.id = 1
        self.name = name
    }
    
}

extension SimpleRecord {
    
    init(recordId:Int64) {
        self.id = recordId
        self.name = "Record #\(recordId)"
    }
    
    var recordId:Int64 {
        // BUG: This always returns '1'
        return id
    }
    
}

The "recordId" property will always return 1, even when the "id" property returns something different. For example:

let record = SimpleRecord(recordId:123)
record.id // 123
record.recordId // 1

This only happens if the initializer is defined in an extension. Placing all the code in the struct works fine.

This seems similar to #SR-1026, but is different since I can see both values. The struct seems to be initialized correctly, but the extension method seems to be optimized out.

Unlike SR-1026, whole-module optimization is not enabled. Just the standard optimization.

I've attached a sample Mac App that highlights the behavior.