| ; When constant propogating terminator instructions, the basic block iterator |
| ; was not updated to refer to the final position of the new terminator. This |
| ; can be bad, f.e. because constproping a terminator can lead to the |
| ; destruction of PHI nodes, which invalidates the iterator! |
| ; |
| ; Fixed by adding new arguments to ConstantFoldTerminator |
| ; |
| ; RUN: opt < %s -constprop |
| |
| define void @build_tree(i32 %ml) { |
| ; <label>:0 |
| br label %bb2 |
| |
| bb2: ; preds = %bb2, %0 |
| %reg137 = phi i32 [ %reg140, %bb2 ], [ 12, %0 ] ; <i32> [#uses=1] |
| %reg138 = phi i32 [ %reg139, %bb2 ], [ 0, %0 ] ; <i32> [#uses=1] |
| %reg139 = add i32 %reg138, 1 ; <i32> [#uses=1] |
| %reg140 = add i32 %reg137, -1 ; <i32> [#uses=1] |
| br i1 false, label %bb2, label %bb3 |
| |
| bb3: ; preds = %bb2 |
| ret void |
| } |
| |
