| // RUN: %clang_cc1 -triple arm64-apple-ios -target-abi darwinpcs -emit-llvm -o - %s | FileCheck %s |
| struct Empty {}; |
| |
| Empty emptyvar; |
| |
| int take_args(int a, ...) { |
| __builtin_va_list l; |
| __builtin_va_start(l, a); |
| // CHECK: call void @llvm.va_start |
| |
| emptyvar = __builtin_va_arg(l, Empty); |
| // CHECK: load i8*, i8** |
| // CHECK-NOT: getelementptr |
| // CHECK: [[EMPTY_PTR:%[a-zA-Z0-9._]+]] = bitcast i8* {{%[a-zA-Z0-9._]+}} to %struct.Empty* |
| |
| // It's conceivable that EMPTY_PTR may not actually be a valid pointer |
| // (e.g. it's at the very bottom of the stack and the next page is |
| // invalid). This doesn't matter provided it's never loaded (there's no |
| // well-defined way to tell), but it becomes a problem if we do try to use it. |
| // CHECK-NOT: load %struct.Empty, %struct.Empty* [[EMPTY_PTR]] |
| |
| int i = __builtin_va_arg(l, int); |
| // CHECK: va_arg i8** {{%[a-zA-Z0-9._]+}}, i32 |
| |
| __builtin_va_end(l); |
| return i; |
| } |
