> On Sep 8, 2016, at 1:17 PM, Rebecca Chen via swift-dev <[email protected]>
> wrote:
>
> I was wondering where the SIL to IR lowering code is in the Swift source
> code.
That’s the responsibility of IRGen:
https://github.com/apple/swift/tree/master/lib/IRGen
> I am specifically looking for the code that lowers the function return types.
> For example, from Int to i64.
Technically, Int is a struct type defined in the standard library that looks
like this:
struct Int {
var _value: Builtin.Int64
}
The lowering of a builtin integer type to an LLVM type is here:
https://github.com/apple/swift/blob/master/lib/IRGen/GenType.cpp#L1256
- Doug
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