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11b1ce2ee7
SIL functions for AST declarations do this, and the SIL verifier enforces this, so let's do it for witness thunks too, fixing a devirtualizer crash. Fixes <rdar://problem/46571799>.
84 lines
2.0 KiB
Swift
84 lines
2.0 KiB
Swift
// RUN: %target-swift-frontend -O -Xllvm -sil-inline-generics=false -Xllvm -sil-disable-pass=GlobalOpt %s -emit-sil -sil-verify-all | tee /tmp/xxx | %FileCheck %s
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public protocol Foo {
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func foo_method()
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}
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public protocol Bar {
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func bar_method()
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}
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@inline(never)
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func bar_marker() {}
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public struct Inner: Bar {
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public func bar_method() {
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bar_marker()
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}
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}
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public struct Outer<T> {
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var x: T
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}
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@inline(never)
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func foo_marker() {}
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extension Outer: Foo where T: Bar {
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public func foo_method() {
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foo_marker()
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x.bar_method()
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}
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}
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func callFoo<T: Foo>(_ x: T) {
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x.foo_method()
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}
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func genericLayer<T: Bar>(_ x: T) {
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callFoo(Outer(x: x))
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}
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// See that we devirtualize/inline enough to get down to the @inline(never)
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// function calls.
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// CHECK-LABEL: sil @$s30devirt_conditional_conformance12throughLayeryyF : $@convention(thin) () -> ()
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// CHECK: function_ref @$s30devirt_conditional_conformance10foo_markeryyF
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// CHECK: function_ref @$s30devirt_conditional_conformance10bar_markeryyF
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// CHECK: return
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public func throughLayer() {
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genericLayer(Inner())
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}
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// CHECK-LABEL: sil @$s30devirt_conditional_conformance6directyyF : $@convention(thin) () -> ()
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// CHECK: function_ref @$s30devirt_conditional_conformance10foo_markeryyF
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// CHECK: function_ref @$s30devirt_conditional_conformance10bar_markeryyF
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// CHECK: return
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public func direct() {
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callFoo(Outer(x: Inner()))
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}
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// Conditional conformance that constraints all generic parameters completely
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// <rdar://problem/46571799>
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public protocol Fish {
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func fish_method()
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}
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@inline(never)
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func fish_marker() {}
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extension Outer: Fish where T == Int {
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public func fish_method() {
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fish_marker()
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}
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}
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func callFish<T : Fish>(_ x: T) {
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x.fish_method()
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}
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// CHECK-LABEL: sil @$s30devirt_conditional_conformance8testFishyyF : $@convention(thin) () -> ()
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// CHECK: function_ref @$s30devirt_conditional_conformance11fish_markeryyF : $@convention(thin) () -> ()
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// CHECK: return
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public func testFish() {
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callFish(Outer(x: 0))
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} |