| Tanya Lattner | 3f7706b | 2004-11-07 06:08:43 +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 | |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 5 | ; Demonstrate all of the variable argument handling intrinsic functions plus |
| 6 | ; the va_arg instruction. |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 7 | |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 8 | implementation |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame] | 9 | declare sbyte* %llvm.va_start() |
| 10 | declare sbyte* %llvm.va_copy(sbyte*) |
| 11 | declare void %llvm.va_end(sbyte*) |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 12 | |
| 13 | int %test(int %X, ...) { |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame] | 14 | %ap = call sbyte* %llvm.va_start() |
| 15 | %aq = call sbyte* %llvm.va_copy(sbyte* %ap) |
| 16 | call void %llvm.va_end(sbyte* %aq) |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 17 | |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame] | 18 | %tmp = vaarg sbyte* %ap, int |
| 19 | %ap2 = vanext sbyte* %ap, int |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 20 | |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame] | 21 | call void %llvm.va_end(sbyte* %ap2) |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 22 | ret int %tmp |
| 23 | } |