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// RUN: %target-swift-frontend -O -emit-sil -parse-as-library %s | %FileCheck %s
// REQUIRES: swift_stdlib_no_asserts,optimized_stdlib
// REQUIRES: swift_in_compiler
// String literals are not completely constant folded in SIL for ptrsize=32 which fails `deadClassInstance()`.
// This is no problem as LLVM can complete the constant folding.
// UNSUPPORTED: PTRSIZE=32
protocol E {
func f() -> Bool
}
protocol P {
associatedtype A = Int
}
public struct X : P, E {
func f() -> Bool { return true }
}
func g<T : P>(_ x : T) -> Bool {
if let y = x as? E { return y.f() }
return false
}
// Check that this function can be completely constant folded and no alloc_stack remains.
// CHECK-LABEL: sil @$s10dead_alloc0A10AllocStackySbAA1XVF :
// CHECK: bb0({{.*}}):
// CHECK-NEXT: debug_value
// CHECK-NEXT: integer_literal
// CHECK-NEXT: struct
// CHECK-NEXT: return
// CHECK-NEXT: } // end sil function '$s10dead_alloc0A10AllocStackySbAA1XVF'
public func deadAllocStack(_ x: X) -> Bool {
return g(x)
}
public class C<T> {
let x: String = "123"
}
// CHECK-LABEL: sil @$s10dead_alloc0A13ClassInstanceyyF :
// CHECK: bb0:
// CHECK-NEXT: tuple
// CHECK-NEXT: return
// CHECK-NEXT: } // end sil function '$s10dead_alloc0A13ClassInstanceyyF'
public func deadClassInstance() {
let _ = C<Int>()
}
// CHECK-LABEL: sil @$s10dead_alloc0A13ManagedBufferyyF :
// CHECK: bb0:
// CHECK-NEXT: debug_value undef
// CHECK-NEXT: tuple
// CHECK-NEXT: return
// CHECK-NEXT: } // end sil function '$s10dead_alloc0A13ManagedBufferyyF'
public func deadManagedBuffer() -> () {
_ = ManagedBuffer<Void, Void>.create(minimumCapacity: 1, makingHeaderWith: { _ in () })
}
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