1*f4a2713aSLionel Sambuc // RUN: %clang_cc1 -triple armv7-apple-ios -emit-llvm -o - %s | FileCheck %s 2*f4a2713aSLionel Sambuc struct Empty {}; 3*f4a2713aSLionel Sambuc 4*f4a2713aSLionel Sambuc Empty emptyvar; 5*f4a2713aSLionel Sambuc take_args(int a,...)6*f4a2713aSLionel Sambucint take_args(int a, ...) { 7*f4a2713aSLionel Sambuc __builtin_va_list l; 8*f4a2713aSLionel Sambuc __builtin_va_start(l, a); 9*f4a2713aSLionel Sambuc // CHECK: call void @llvm.va_start 10*f4a2713aSLionel Sambuc 11*f4a2713aSLionel Sambuc emptyvar = __builtin_va_arg(l, Empty); 12*f4a2713aSLionel Sambuc // CHECK: load i8** 13*f4a2713aSLionel Sambuc // CHECK-NOT: getelementptr 14*f4a2713aSLionel Sambuc // CHECK: [[EMPTY_PTR:%[a-zA-Z0-9._]+]] = bitcast i8* {{%[a-zA-Z0-9._]+}} to %struct.Empty* 15*f4a2713aSLionel Sambuc 16*f4a2713aSLionel Sambuc // It's conceivable that EMPTY_PTR may not actually be a valid pointer 17*f4a2713aSLionel Sambuc // (e.g. it's at the very bottom of the stack and the next page is 18*f4a2713aSLionel Sambuc // invalid). This doesn't matter provided it's never loaded (there's no 19*f4a2713aSLionel Sambuc // well-defined way to tell), but it becomes a problem if we do try to use it. 20*f4a2713aSLionel Sambuc // CHECK-NOT: load %struct.Empty* [[EMPTY_PTR]] 21*f4a2713aSLionel Sambuc 22*f4a2713aSLionel Sambuc int i = __builtin_va_arg(l, int); 23*f4a2713aSLionel Sambuc // CHECK: load i32* 24*f4a2713aSLionel Sambuc 25*f4a2713aSLionel Sambuc __builtin_va_end(l); 26*f4a2713aSLionel Sambuc return i; 27*f4a2713aSLionel Sambuc } 28