File: returns-large-class-irgen.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 (20 lines) | stat: -rw-r--r-- 852 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
 
// RUN: %target-swift-emit-ir -I %S/Inputs -enable-experimental-cxx-interop %s -validate-tbd-against-ir=none | %FileCheck %s

// This test verifies that Swift correctly emits IR calls to C++ functions that
// had Named Return Value Optimization applied to them. The first argument of
// such functions has `sret` attribute. When calling them, the first
// parameter should be wrapped in `sret(...)`.

import ReturnsLargeClass

func foo() -> LargeClass {
  let x = funcReturnsLargeClass()
  return x
}

foo()

// CHECK: call swiftcc void @"$s4main3fooSo10LargeClassVyF"(ptr noalias nocapture sret(%TSo10LargeClassV) %{{.*}})

// The C++ function:
// CHECK: define{{( dso_local)?}} void @{{_Z21funcReturnsLargeClassv|"\?funcReturnsLargeClass@@YA\?AULargeClass@@XZ"}}({{%struct.LargeClass\*|ptr}} noalias sret(%struct.LargeClass){{( align .*)?}} %{{.*}})