1*0a6a1f1dSLionel Sambuc // RUN: %clang_cc1 -triple arm64-apple-ios -target-abi darwinpcs -emit-llvm -o - %s | FileCheck %s 2*0a6a1f1dSLionel Sambuc struct Empty {}; 3*0a6a1f1dSLionel Sambuc 4*0a6a1f1dSLionel Sambuc Empty emptyvar; 5*0a6a1f1dSLionel Sambuc take_args(int a,...)6*0a6a1f1dSLionel Sambucint take_args(int a, ...) { 7*0a6a1f1dSLionel Sambuc __builtin_va_list l; 8*0a6a1f1dSLionel Sambuc __builtin_va_start(l, a); 9*0a6a1f1dSLionel Sambuc // CHECK: call void @llvm.va_start 10*0a6a1f1dSLionel Sambuc 11*0a6a1f1dSLionel Sambuc emptyvar = __builtin_va_arg(l, Empty); 12*0a6a1f1dSLionel Sambuc // CHECK: load i8** 13*0a6a1f1dSLionel Sambuc // CHECK-NOT: getelementptr 14*0a6a1f1dSLionel Sambuc // CHECK: [[EMPTY_PTR:%[a-zA-Z0-9._]+]] = bitcast i8* {{%[a-zA-Z0-9._]+}} to %struct.Empty* 15*0a6a1f1dSLionel Sambuc 16*0a6a1f1dSLionel Sambuc // It's conceivable that EMPTY_PTR may not actually be a valid pointer 17*0a6a1f1dSLionel Sambuc // (e.g. it's at the very bottom of the stack and the next page is 18*0a6a1f1dSLionel Sambuc // invalid). This doesn't matter provided it's never loaded (there's no 19*0a6a1f1dSLionel Sambuc // well-defined way to tell), but it becomes a problem if we do try to use it. 20*0a6a1f1dSLionel Sambuc // CHECK-NOT: load %struct.Empty* [[EMPTY_PTR]] 21*0a6a1f1dSLionel Sambuc 22*0a6a1f1dSLionel Sambuc int i = __builtin_va_arg(l, int); 23*0a6a1f1dSLionel Sambuc // CHECK: va_arg i8** {{%[a-zA-Z0-9._]+}}, i32 24*0a6a1f1dSLionel Sambuc 25*0a6a1f1dSLionel Sambuc __builtin_va_end(l); 26*0a6a1f1dSLionel Sambuc return i; 27*0a6a1f1dSLionel Sambuc } 28