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