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// RUN: %target-swift-frontend -primary-file %s -O -sil-verify-all -Xllvm -sil-disable-pass=function-signature-opts -module-name=test -O -target %target-cpu-apple-macos10.15 -emit-sil | %FileCheck %s
// RUN: %empty-directory(%t)
// RUN: %target-build-swift -O -Xllvm -sil-disable-pass=function-signature-opts -module-name=test %s -o %t/a.out
// RUN: %target-run %t/a.out | %FileCheck %s -check-prefix=CHECK-OUTPUT
// REQUIRES: OS=macosx
// REQUIRES: executable_test,swift_stdlib_no_asserts,optimized_stdlib
// REQUIRES: swift_in_compiler
// Check that the optimizer can remove "unbalanced" retains for immortal objects.
// But only with a Swift 5.1 runtime (which supports immortal objects).
// CHECK-LABEL: sil hidden [noinline] @$s4test10emptyArraySaySiGyF
// CHECK: global_addr
// CHECK-NOT: retain
// CHECK: } // end sil function '$s4test10emptyArraySaySiGyF'
@inline(never)
func emptyArray() -> [Int] {
let x = [Int]()
return x
}
// CHECK-LABEL: sil hidden [noinline] @$s4test13constantArraySaySiGyF
// CHECK: global_value
// CHECK-NOT: retain
// CHECK: } // end sil function '$s4test13constantArraySaySiGyF'
@inline(never)
func constantArray() -> [Int] {
return [1, 2, 3]
}
func testit() {
// CHECK-OUTPUT: []
// CHECK-OUTPUT: [1, 2, 3]
// CHECK-OUTPUT: []
// CHECK-OUTPUT: [1, 2, 3]
// CHECK-OUTPUT: []
// CHECK-OUTPUT: [1, 2, 3]
for _ in 0..<3 {
print(emptyArray())
print(constantArray())
}
}
testit()
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