| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame^] | 1 | ; RUN: llvm-upgrade < %s | llvm-as | opt -anders-aa -load-vn -gcse -deadargelim | llvm-dis | grep store | not grep null |
| 2 | |
| 3 | ; Because the 'internal' function is passed to an external function, we don't |
| 4 | ; know what the incoming values will alias. As such, we cannot do the |
| 5 | ; optimization checked by the 'arg-must-alias.llx' test. |
| 6 | |
| 7 | declare void %external(int(int*)*) |
| 8 | %G = internal constant int* null |
| 9 | |
| 10 | implementation |
| 11 | |
| 12 | internal int %internal(int* %ARG) { |
| 13 | ;;; We *DON'T* know that ARG always points to null! |
| 14 | store int* %ARG, int** %G |
| 15 | ret int 0 |
| 16 | } |
| 17 | |
| 18 | int %foo() { |
| 19 | call void %external(int(int*)* %internal) |
| 20 | %V = call int %internal(int* null) |
| 21 | ret int %V |
| 22 | } |