| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame^] | 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 | } |