| ; This test shows SCCP "proving" that the loop (from bb6 to 14) loops infinitely |
| ; this is in fact NOT the case, so the return should still be alive in the code |
| ; after sccp and CFG simplification have been performed. |
| ; |
| ; RUN: opt < %s -sccp -simplifycfg -S | \ |
| ; RUN: grep ret |
| |
| define void @old_main() { |
| bb3: |
| br label %bb6 |
| bb6: ; preds = %bb14, %bb3 |
| %reg403 = phi i32 [ %reg155, %bb14 ], [ 0, %bb3 ] ; <i32> [#uses=1] |
| %reg155 = add i32 %reg403, 1 ; <i32> [#uses=2] |
| br label %bb11 |
| bb11: ; preds = %bb11, %bb6 |
| %reg407 = phi i32 [ %reg408, %bb11 ], [ 0, %bb6 ] ; <i32> [#uses=2] |
| %reg408 = add i32 %reg407, 1 ; <i32> [#uses=1] |
| %cond550 = icmp sle i32 %reg407, 1 ; <i1> [#uses=1] |
| br i1 %cond550, label %bb11, label %bb12 |
| bb12: ; preds = %bb11 |
| br label %bb13 |
| bb13: ; preds = %bb13, %bb12 |
| %reg409 = phi i32 [ %reg410, %bb13 ], [ 0, %bb12 ] ; <i32> [#uses=1] |
| %reg410 = add i32 %reg409, 1 ; <i32> [#uses=2] |
| %cond552 = icmp sle i32 %reg410, 2 ; <i1> [#uses=1] |
| br i1 %cond552, label %bb13, label %bb14 |
| bb14: ; preds = %bb13 |
| %cond553 = icmp sle i32 %reg155, 31 ; <i1> [#uses=1] |
| br i1 %cond553, label %bb6, label %bb15 |
| bb15: ; preds = %bb14 |
| ret void |
| } |
| |
