26 lines · cpp
1// RUN: %clang_cc1 -triple arm64-apple-ios -target-abi darwinpcs -emit-llvm -o - %s | FileCheck %s2struct Empty {};3 4Empty emptyvar;5 6int take_args(int a, ...) {7 __builtin_va_list l;8 __builtin_va_start(l, a);9// CHECK: call void @llvm.va_start10 11 emptyvar = __builtin_va_arg(l, Empty);12// CHECK-NOT: getelementptr13 14 // It's conceivable that EMPTY_PTR may not actually be a valid pointer15 // (e.g. it's at the very bottom of the stack and the next page is16 // invalid). This doesn't matter provided it's never loaded (there's no17 // 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._]+}}, i3222 23 __builtin_va_end(l);24 return i;25}26