File: returns-large-class-irgen.swift

package info (click to toggle)
swiftlang 6.1.3-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,532 kB
  • sloc: cpp: 9,901,743; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (20 lines) | stat: -rw-r--r-- 850 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}}{{.*}} sret(%struct.LargeClass){{( align .*)?}} %{{.*}})