| 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 |
| 5 | declare void %llvm.va_start(sbyte**, ...) |
| 6 | declare void %llvm.va_copy(sbyte**, 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, ...) { |
| 10 | %ap = alloca sbyte* |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame^] | 11 | %aq = alloca sbyte* |
| 12 | call void (sbyte**, ...)* %llvm.va_start(sbyte** %ap, int %X) |
| 13 | %apv = load sbyte** %ap |
| 14 | call void %llvm.va_copy(sbyte** %aq, sbyte* %apv) |
| 15 | call void %llvm.va_end(sbyte** %aq) |
| 16 | |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 17 | %tmp = va_arg sbyte** %ap, int |
| Chris Lattner | 6d95257 | 2003-05-08 03:46:51 +0000 | [diff] [blame^] | 18 | |
| 19 | call void %llvm.va_end(sbyte** %ap) |
| Chris Lattner | 92858ed | 2003-05-08 02:39:37 +0000 | [diff] [blame] | 20 | ret int %tmp |
| 21 | } |