Merge pull request swiftlang#30512 from slavapestov/curry-thunk-regression-test-again

Re-apply: Add regression test for rdar://59496033

Author: slavapestov

test/SILGen/cf_curried_init.swift

@@ -0,0 +1,11 @@
+// RUN: %target-swift-emit-silgen %s | %FileCheck %s
+
+// REQUIRES: objc_interop
+
+import Foundation
+import CoreGraphics
+
+let _: (CFURL) -> CGDataProvider? = CGDataProvider.init
+
+// CHECK-LABEL: sil private [ossa] @$s15cf_curried_initSo17CGDataProviderRefaSgSo8CFURLRefacfu_ : $@convention(thin) (@guaranteed CFURL) -> @owned Optional<CGDataProvider>
+// CHECK-LABEL: sil [available {{.*}}] [clang CGDataProvider.init] @CGDataProviderCreateWithURL : $@convention(c) (CFURL) -> @owned Optional<CGDataProvider>