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 8 declare void @llvm.va_start(i8*) 9 10 declare void @llvm.va_copy(i8*, i8*) 11 12 declare void @llvm.va_end(i8*) 13 14 define i32 @test(i32 %X, ...) { 15 ; Allocate two va_list items. On this target, va_list is of type sbyte* 16 %ap = alloca i8* ; <i8**> [#uses=4] 17 %aq = alloca i8* ; <i8**> [#uses=2] 18 19 ; Initialize variable argument processing 20 %va.upgrd.1 = bitcast i8** %ap to i8* ; <i8*> [#uses=1] 21 call void @llvm.va_start( i8* %va.upgrd.1 ) 22 23 ; Read a single integer argument 24 %tmp = va_arg i8** %ap, i32 ; <i32> [#uses=1] 25 26 ; Demonstrate usage of llvm.va_copy and llvm_va_end 27 %apv = load i8*, i8** %ap ; <i8*> [#uses=1] 28 %va0.upgrd.2 = bitcast i8** %aq to i8* ; <i8*> [#uses=1] 29 %va1.upgrd.3 = bitcast i8* %apv to i8* ; <i8*> [#uses=1] 30 call void @llvm.va_copy( i8* %va0.upgrd.2, i8* %va1.upgrd.3 ) 31 %va.upgrd.4 = bitcast i8** %aq to i8* ; <i8*> [#uses=1] 32 call void @llvm.va_end( i8* %va.upgrd.4 ) 33 34 ; Stop processing of arguments. 35 %va.upgrd.5 = bitcast i8** %ap to i8* ; <i8*> [#uses=1] 36 call void @llvm.va_end( i8* %va.upgrd.5 ) 37 ret i32 %tmp 38 } 39
