1 ; RUN: llvm-as %s -o - | 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 8 declare void @llvm.va_start(i8**) 9 declare void @llvm.va_copy(i8**, i8*) 10 declare void @llvm.va_end(i8**) 11 12 define i31 @test(i31 %X, ...) { 13 ; Allocate two va_list items. On this target, va_list is of type i8* 14 %ap = alloca i8* ; <i8**> [#uses=4] 15 %aq = alloca i8* ; <i8**> [#uses=2] 16 17 ; Initialize variable argument processing 18 call void @llvm.va_start(i8** %ap) 19 20 ; Read a single integer argument 21 %tmp = va_arg i8** %ap, i31 ; <i31> [#uses=1] 22 23 ; Demonstrate usage of llvm.va_copy and llvm_va_end 24 %apv = load i8** %ap ; <i8*> [#uses=1] 25 call void @llvm.va_copy(i8** %aq, i8* %apv) 26 call void @llvm.va_end(i8** %aq) 27 28 ; Stop processing of arguments. 29 call void @llvm.va_end(i8** %ap) 30 ret i31 %tmp 31 32 } 33
