| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 1 | ; Demonstrate all of the variable argument handling intrinsic functions plus |
| 2 | ; the va_arg instruction. |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 3 | |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 4 | implementation |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame^] | 5 | declare sbyte* %llvm.va_start() |
| 6 | declare sbyte* %llvm.va_copy(sbyte*) |
| 7 | declare void %llvm.va_end(sbyte*) |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 8 | |
| 9 | int %test(int %X, ...) { |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame^] | 10 | %ap = call sbyte* %llvm.va_start() |
| 11 | %aq = call sbyte* %llvm.va_copy(sbyte* %ap) |
| 12 | call void %llvm.va_end(sbyte* %aq) |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 13 | |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame^] | 14 | %tmp = vaarg sbyte* %ap, int |
| 15 | %ap2 = vanext sbyte* %ap, int |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame] | 16 | |
| Chris Lattner | 25e6e99 | 2003-10-21 15:36:21 +0000 | [diff] [blame^] | 17 | call void %llvm.va_end(sbyte* %ap2) |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 18 | ret int %tmp |
| 19 | } |