Hi Michael,
Firstly: if swift-dev is not the right place for me to ask silly questions,
please let me know :).
Thanks very much for all your pointers on the JIRA [1] ticket. I was just
trying to get started and already have a few questions. Apologies, they're very
basic as I'm just getting started with the Swift compiler source and tooling.
The first question is just about the tooling: I got sil-opt to run with an
invocation like this:
swiftc -emit-module -O test.swift
sil-opt -sdk $(xcrun --show-sdk-path) test.swiftmodule
Now you advise to run the '-debug-only=sil-redundant-load-elim' so I tried
sil-opt [...] -debug-only=sil-redundant-load-elim
but it doesn't seem happy with that. Did I misunderstand how to pass this
option?
My second question actually relates to your first suggestion: 'creating a
simple test that performs a store, then passes the address to an in_guaranteed
function and then reloads the value'
I read up about @in_guaranteed and I managed to make a @in_guaranteed function
this way:
protocol Foo {
func foo()
}
extension Foo {
func foo() {}
}
The `foo()` function will now be an @in_guaranteed function taking `self`,
correct? (any other ways to create an `@in_guaranteed` function easily?) This
is probably me being a bit slow but what exactly do you mean with performing a
store, passing the address to an @in_guaranteed function and then reloading the
value? Very naively I thought about
class C: Foo {}
func something() {
let c = C()
var b: Foo = c /* store */
b.foo() /* pass the address to an `@in_guaranteed` func */
c.foo() /* load again */
}
is this roughly what you had in mind?
Thanks,
Johannes
[1]: https://bugs.swift.org/browse/SR-5403
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