1; RUN: llvm-as < %s | llvm-dis > %t1.ll 2; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll 3; RUN: diff %t1.ll %t2.ll 4 5; Demonstrate all of the variable argument handling intrinsic functions plus 6; the va_arg instruction. 7 8declare void @llvm.va_start(ptr) 9 10declare void @llvm.va_copy(ptr, ptr) 11 12declare void @llvm.va_end(ptr) 13 14define i32 @test(i32 %X, ...) { 15 ; Allocate two va_list items. On this target, va_list is of type sbyte* 16 %ap = alloca ptr ; <ptr> [#uses=4] 17 %aq = alloca ptr ; <ptr> [#uses=2] 18 19 ; Initialize variable argument processing 20 call void @llvm.va_start( ptr %ap ) 21 22 ; Read a single integer argument 23 %tmp = va_arg ptr %ap, i32 ; <i32> [#uses=1] 24 25 ; Demonstrate usage of llvm.va_copy and llvm_va_end 26 %apv = load ptr, ptr %ap ; <ptr> [#uses=1] 27 call void @llvm.va_copy( ptr %aq, ptr %apv ) 28 call void @llvm.va_end( ptr %aq ) 29 30 ; Stop processing of arguments. 31 call void @llvm.va_end( ptr %ap ) 32 ret i32 %tmp 33} 34