1*67e74705SXin Li // RUN: %clang_cc1 -triple arm64-apple-ios -target-abi darwinpcs -emit-llvm -o - %s | FileCheck %s 2*67e74705SXin Li struct Empty {}; 3*67e74705SXin Li 4*67e74705SXin Li Empty emptyvar; 5*67e74705SXin Li take_args(int a,...)6*67e74705SXin Liint take_args(int a, ...) { 7*67e74705SXin Li __builtin_va_list l; 8*67e74705SXin Li __builtin_va_start(l, a); 9*67e74705SXin Li // CHECK: call void @llvm.va_start 10*67e74705SXin Li 11*67e74705SXin Li emptyvar = __builtin_va_arg(l, Empty); 12*67e74705SXin Li // CHECK: load i8*, i8** 13*67e74705SXin Li // CHECK-NOT: getelementptr 14*67e74705SXin Li // CHECK: [[EMPTY_PTR:%[a-zA-Z0-9._]+]] = bitcast i8* {{%[a-zA-Z0-9._]+}} to %struct.Empty* 15*67e74705SXin Li 16*67e74705SXin Li // It's conceivable that EMPTY_PTR may not actually be a valid pointer 17*67e74705SXin Li // (e.g. it's at the very bottom of the stack and the next page is 18*67e74705SXin Li // invalid). This doesn't matter provided it's never loaded (there's no 19*67e74705SXin Li // well-defined way to tell), but it becomes a problem if we do try to use it. 20*67e74705SXin Li // CHECK-NOT: load %struct.Empty, %struct.Empty* [[EMPTY_PTR]] 21*67e74705SXin Li 22*67e74705SXin Li int i = __builtin_va_arg(l, int); 23*67e74705SXin Li // CHECK: va_arg i8** {{%[a-zA-Z0-9._]+}}, i32 24*67e74705SXin Li 25*67e74705SXin Li __builtin_va_end(l); 26*67e74705SXin Li return i; 27*67e74705SXin Li } 28