1; RUN: llc -mtriple aarch64-unknown-windows-msvc %s -o - | FileCheck %s 2 3define internal swifttailcc void @"?future_adapter@@YWXPEAVAsyncContext@swift@@@Z"(ptr noundef swiftasync %_context) #0 { 4entry: 5 %add.ptr = getelementptr inbounds i8, ptr %_context, i64 -32 6 %asyncEntryPoint = getelementptr inbounds i8, ptr %_context, i64 -24 7 %0 = load ptr, ptr %asyncEntryPoint, align 8 8 %closureContext = getelementptr inbounds i8, ptr %_context, i64 -16 9 %1 = load ptr, ptr %closureContext, align 8 10 %2 = load ptr, ptr %add.ptr, align 8 11 musttail call swifttailcc void %0(ptr noundef %2, ptr noundef swiftasync %_context, ptr noundef swiftself %1) #17 12 ret void 13} 14 15; Check that x20 isn't saved/restored at the prologue/epilogue which 16; would interfere with the outgoing self parameter on x20 at the tail 17; call. 18 19; CHECK-NOT: st{{.*}}x20 20; CHECK: ldp x1, x20, [x22, #-24] 21; CHECK-NEXT: ldur x0, [x22, #-32] 22; CHECK-NEXT: br x1 23