File: devirt_speculative_nested.swift

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (32 lines) | stat: -rw-r--r-- 1,044 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 

// RUN: %target-swift-frontend -module-name devirt_speculative_nested %s -parse-as-library -enable-spec-devirt -O -emit-sil | %FileCheck %s
// RUN: %target-swift-frontend -module-name devirt_speculative_nested %s -parse-as-library -Osize -emit-sil
//
// Test speculative devirtualization.

public class Outer<T> {
  final class Inner : Base {
    @inline(never) override func update() {
    }
  }
}

public class Base {
  @inline(never) func update() { }
}

// FIXME: We don't speculate to the override Outer<T>.Inner.update() here,
// because we cannot express the cast -- the cast "returns" a new archetype
// T, much like an opened existential.
//
// But at least, we shouldn't crash.

// CHECK-LABEL: sil @$s25devirt_speculative_nested3foo1xyAA4BaseC_tF : $@convention(thin) (@guaranteed Base) -> ()
// CHECK: checked_cast_br [exact] Base in %0 : $Base to Base
// CHECK: function_ref @$s25devirt_speculative_nested4BaseC6updateyyF
// CHECK: class_method %0 : $Base, #Base.update
// CHECK: return

public func foo(x: Base) {
  x.update()
}