| Matt Arsenault | 01d17e7 | 2017-04-21 23:54:12 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -lowerswitch %s | FileCheck %s |
| 2 | |
| 3 | ; CHECK-LABEL: @phi_in_dead_block( |
| 4 | ; CHECK-NOT: switch |
| 5 | define void @phi_in_dead_block() { |
| 6 | bb: |
| 7 | br i1 undef, label %bb2, label %bb3 |
| 8 | |
| 9 | bb1: ; No predecessors! |
| 10 | switch i32 undef, label %bb2 [ |
| 11 | i32 9, label %bb3 |
| 12 | ] |
| 13 | |
| 14 | bb2: ; preds = %bb1, %bb |
| 15 | %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ] |
| 16 | unreachable |
| 17 | |
| 18 | bb3: ; preds = %bb1, %bb |
| 19 | unreachable |
| 20 | } |
| 21 | |
| 22 | ; CHECK-LABEL: @phi_in_dead_block_br_to_self( |
| 23 | ; CHECK-NOT: switch |
| 24 | define void @phi_in_dead_block_br_to_self() { |
| 25 | bb: |
| 26 | br i1 undef, label %bb2, label %bb3 |
| 27 | |
| 28 | bb1: ; No predecessors! |
| 29 | switch i32 undef, label %bb2 [ |
| 30 | i32 9, label %bb3 |
| 31 | i32 10, label %bb1 |
| 32 | ] |
| 33 | |
| 34 | bb2: ; preds = %bb1, %bb |
| 35 | %tmp = phi i64 [ undef, %bb1 ], [ undef, %bb ] |
| 36 | unreachable |
| 37 | |
| 38 | bb3: ; preds = %bb1, %bb |
| 39 | unreachable |
| 40 | } |