| ; RUN: opt < %s -S -gvn-sink | FileCheck %s |
| |
| ; Because %tmp17 has flipped operands to its equivalents %tmp14 and %tmp7, we |
| ; can't sink the zext as we'd need a shuffling PHI in between. |
| ; |
| ; Just sinking the zext isn't profitable, so ensure nothing is sunk. |
| |
| ; CHECK-LABEL: @hoge |
| ; CHECK-NOT: bb18.gvnsink.split |
| define void @hoge() { |
| bb: |
| br i1 undef, label %bb4, label %bb11 |
| |
| bb4: ; preds = %bb3 |
| br i1 undef, label %bb6, label %bb8 |
| |
| bb6: ; preds = %bb5 |
| %tmp = zext i16 undef to i64 |
| %tmp7 = add i64 %tmp, undef |
| br label %bb18 |
| |
| bb8: ; preds = %bb5 |
| %tmp9 = zext i16 undef to i64 |
| br label %bb18 |
| |
| bb11: ; preds = %bb10 |
| br i1 undef, label %bb12, label %bb15 |
| |
| bb12: ; preds = %bb11 |
| %tmp13 = zext i16 undef to i64 |
| %tmp14 = add i64 %tmp13, undef |
| br label %bb18 |
| |
| bb15: ; preds = %bb11 |
| %tmp16 = zext i16 undef to i64 |
| %tmp17 = add i64 undef, %tmp16 |
| br label %bb18 |
| |
| bb18: ; preds = %bb15, %bb12, %bb8, %bb6 |
| %tmp19 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb8 ], [ %tmp14, %bb12 ], [ %tmp17, %bb15 ] |
| unreachable |
| } |
