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// RUN: %empty-directory(%t)
// RUN: %clang -c -std=c++17 -v %target-cc-options %target-threading-opt -g -O0 -isysroot %sdk %S/Inputs/isPrespecialized.cpp -o %t/isPrespecialized.o -I %clang-include-dir -I %swift_src_root/include/ -I %swift_src_root/stdlib/public/SwiftShims/ -I %llvm_src_root/include -I %llvm_obj_root/include -L %clang-include-dir/../lib/swift/macosx
// RUN: %target-build-swift -v %mcp_opt %s %t/isPrespecialized.o -import-objc-header %S/Inputs/isPrespecialized.h -Xfrontend -prespecialize-generic-metadata -target %module-target-future -lc++ -L %clang-include-dir/../lib/swift/macosx -sdk %sdk -o %t/main
// RUN: %target-codesign %t/main
// RUN: %target-run %t/main
// REQUIRES: OS=macosx
// REQUIRES: executable_test
// UNSUPPORTED: use_os_stdlib
// UNSUPPORTED: swift_test_mode_optimize
// UNSUPPORTED: swift_test_mode_optimize_size
func ptr<T>(to ty: T.Type) -> UnsafeMutableRawPointer {
UnsafeMutableRawPointer(mutating: unsafePointerToMetadata(of: ty))!
}
func unsafePointerToMetadata<T>(of ty: T.Type) -> UnsafePointer<T.Type> {
unsafeBitCast(ty, to: UnsafePointer<T.Type>.self)
}
protocol Natural {}
struct Zero : Natural {}
struct Successor<N : Natural> : Natural {}
extension Natural {
static func withSuccessor<
Invocation : WithSuccessorInvocation
>
(
invoke invocation: Invocation
)
-> Invocation.Return
{
invocation.invoke(Successor<Self>.self)
}
static func withSuccessor<
Invocation : WithSuccessorInvocation
>
(
offsetBy count: UInt,
invoke invocation: Invocation
)
-> Invocation.Return
{
if isCanonicalStaticallySpecializedGenericMetadata(ptr(to: Self.self)) {
fatalError()
}
switch count {
case 0:
return invocation.invoke(Self.self)
case 1:
return withSuccessor(invoke: invocation)
default:
return Successor<Self>.withSuccessor(
offsetBy: count - 1,
invoke: invocation
)
}
}
}
protocol WithSuccessorInvocation {
associatedtype Return
func invoke<N : Natural>( _ t: N.Type) -> Return
}
struct PointerInvocation : WithSuccessorInvocation {
typealias Return = UnsafeMutableRawPointer
func invoke<N : Natural>(_ t: N.Type) -> Return {
ptr(to: t)
}
}
allocateDirtyAndFreeChunk()
_ = Zero.withSuccessor(offsetBy: 10000, invoke: PointerInvocation())
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