| Wei Mi | fc0e245 | 2017-07-25 23:37:17 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -instcombine -licm -loop-unswitch -loop-unswitch-threshold=1000 -disable-output -stats 2>&1| FileCheck %s |
| 2 | ; Check no loop unswitch is done because unswitching of equality expr with |
| 3 | ; undef is unsafe before the freeze patch is committed. |
| 4 | ; CHECK-NOT: Number of branches unswitched |
| 5 | |
| 6 | define void @ham(i64 %arg) local_unnamed_addr { |
| 7 | bb: |
| 8 | %tmp = icmp eq i64 %arg, 0 |
| 9 | br i1 %tmp, label %bb3, label %bb1 |
| 10 | |
| 11 | bb1: ; preds = %bb |
| 12 | %tmp2 = load volatile i64, i64* @global, align 8 |
| 13 | br label %bb3 |
| 14 | |
| 15 | bb3: ; preds = %bb1, %bb |
| 16 | %tmp4 = phi i64 [ %tmp2, %bb1 ], [ undef, %bb ] |
| 17 | %tmp5 = load i64, i64* @global.1, align 8 |
| 18 | br label %bb6 |
| 19 | |
| 20 | bb6: ; preds = %bb21, %bb3 |
| 21 | %tmp7 = phi i64 [ 3, %bb21 ], [ %tmp5, %bb3 ] |
| 22 | %tmp8 = phi i64 [ %tmp25, %bb21 ], [ 0, %bb3 ] |
| 23 | %tmp9 = icmp eq i64 %tmp7, %arg |
| 24 | br i1 %tmp9, label %bb10, label %bb28 |
| 25 | |
| 26 | bb10: ; preds = %bb6 |
| 27 | %tmp11 = icmp eq i64 %tmp7, 0 |
| 28 | br i1 %tmp11, label %bb21, label %bb12 |
| 29 | |
| 30 | bb12: ; preds = %bb10 |
| 31 | %tmp13 = load i64, i64* @global.2, align 8 |
| 32 | %tmp14 = add nsw i64 %tmp13, 1 |
| 33 | store i64 %tmp14, i64* @global.2, align 8 |
| 34 | %tmp15 = load i64, i64* @global.3, align 8 |
| 35 | %tmp16 = icmp eq i64 %tmp15, %tmp4 |
| 36 | br i1 %tmp16, label %bb17, label %bb21 |
| 37 | |
| 38 | bb17: ; preds = %bb12 |
| 39 | %tmp18 = phi i64 [ %tmp15, %bb12 ] |
| 40 | %tmp19 = load i64, i64* @global.4, align 8 |
| 41 | %tmp20 = add nsw i64 %tmp19, %tmp18 |
| 42 | store i64 %tmp20, i64* @global.5, align 8 |
| 43 | br label %bb29 |
| 44 | |
| 45 | bb21: ; preds = %bb12, %bb10 |
| 46 | %tmp22 = load i64, i64* @global.3, align 8 |
| 47 | %tmp23 = load volatile i64, i64* @global, align 8 |
| 48 | %tmp24 = add nsw i64 %tmp23, %tmp22 |
| 49 | store i64 %tmp24, i64* @global.5, align 8 |
| 50 | store i64 3, i64* @global.1, align 8 |
| 51 | %tmp25 = add nsw i64 %tmp8, 1 |
| 52 | %tmp26 = load i64, i64* @global.6, align 8 |
| 53 | %tmp27 = icmp slt i64 %tmp25, %tmp26 |
| 54 | br i1 %tmp27, label %bb6, label %bb28 |
| 55 | |
| 56 | bb28: ; preds = %bb21, %bb6 |
| 57 | br label %bb29 |
| 58 | |
| 59 | bb29: ; preds = %bb28, %bb17 |
| 60 | ret void |
| 61 | } |
| 62 | |
| 63 | define void @zot(i64 %arg, i64 %arg1) local_unnamed_addr { |
| 64 | bb: |
| 65 | %tmp = icmp eq i64 %arg, 0 |
| 66 | %tmp2 = select i1 %tmp, i64 %arg1, i64 undef |
| 67 | %tmp3 = load i64, i64* @global.1, align 8 |
| 68 | br label %bb4 |
| 69 | |
| 70 | bb4: ; preds = %bb19, %bb |
| 71 | %tmp5 = phi i64 [ 3, %bb19 ], [ %tmp3, %bb ] |
| 72 | %tmp6 = phi i64 [ %tmp23, %bb19 ], [ 0, %bb ] |
| 73 | %tmp7 = icmp eq i64 %tmp5, %arg |
| 74 | br i1 %tmp7, label %bb8, label %bb26 |
| 75 | |
| 76 | bb8: ; preds = %bb4 |
| 77 | %tmp9 = icmp eq i64 %tmp5, 0 |
| 78 | br i1 %tmp9, label %bb19, label %bb10 |
| 79 | |
| 80 | bb10: ; preds = %bb8 |
| 81 | %tmp11 = load i64, i64* @global.2, align 8 |
| 82 | %tmp12 = add nsw i64 %tmp11, 1 |
| 83 | store i64 %tmp12, i64* @global.2, align 8 |
| 84 | %tmp13 = load i64, i64* @global.3, align 8 |
| 85 | %tmp14 = icmp eq i64 %tmp13, %tmp2 |
| 86 | br i1 %tmp14, label %bb15, label %bb19 |
| 87 | |
| 88 | bb15: ; preds = %bb10 |
| 89 | %tmp16 = phi i64 [ %tmp13, %bb10 ] |
| 90 | %tmp17 = load i64, i64* @global.4, align 8 |
| 91 | %tmp18 = add nsw i64 %tmp17, %tmp16 |
| 92 | store i64 %tmp18, i64* @global.5, align 8 |
| 93 | br label %bb27 |
| 94 | |
| 95 | bb19: ; preds = %bb10, %bb8 |
| 96 | %tmp20 = load i64, i64* @global.3, align 8 |
| 97 | %tmp21 = load volatile i64, i64* @global, align 8 |
| 98 | %tmp22 = add nsw i64 %tmp21, %tmp20 |
| 99 | store i64 %tmp22, i64* @global.5, align 8 |
| 100 | store i64 3, i64* @global.1, align 8 |
| 101 | %tmp23 = add nsw i64 %tmp6, 1 |
| 102 | %tmp24 = load i64, i64* @global.6, align 8 |
| 103 | %tmp25 = icmp slt i64 %tmp23, %tmp24 |
| 104 | br i1 %tmp25, label %bb4, label %bb26 |
| 105 | |
| 106 | bb26: ; preds = %bb19, %bb4 |
| 107 | br label %bb27 |
| 108 | |
| 109 | bb27: ; preds = %bb26, %bb15 |
| 110 | ret void |
| 111 | } |
| 112 | |
| 113 | @global = common global i64 0, align 8 |
| 114 | @global.1 = common global i64 0, align 8 |
| 115 | @global.2 = common global i64 0, align 8 |
| 116 | @global.3 = common global i64 0, align 8 |
| 117 | @global.4 = common global i64 0, align 8 |
| 118 | @global.5 = common global i64 0, align 8 |
| 119 | @global.6 = common global i64 0, align 8 |
| 120 | |
| 121 | |