| Chad Rosier | 25cfb7d | 2016-05-05 15:39:18 +0000 | [diff] [blame] | 1 | ; RUN: opt %s -S -simplifycfg | FileCheck %s |
| 2 | |
| 3 | ; cmp1 implies cmp2 is false |
| 4 | ; CHECK-LABEL: @test1 |
| 5 | ; CHECK-NOT: call void @is(i1 true) |
| 6 | ; CHECK: call void @is(i1 false) |
| 7 | define void @test1(i32 %a) { |
| 8 | %cmp1 = icmp eq i32 %a, 0 |
| 9 | br i1 %cmp1, label %taken, label %untaken |
| 10 | |
| 11 | taken: |
| 12 | %cmp2 = icmp eq i32 %a, 1 |
| 13 | br i1 %cmp2, label %istrue, label %isfalse |
| 14 | |
| 15 | istrue: |
| 16 | call void @is(i1 true) |
| 17 | ret void |
| 18 | |
| 19 | isfalse: |
| 20 | call void @is(i1 false) |
| 21 | ret void |
| 22 | |
| 23 | untaken: |
| 24 | ret void |
| 25 | } |
| 26 | |
| 27 | ; cmp1 implies cmp2 is false |
| 28 | ; CHECK-LABEL: @test2 |
| 29 | ; CHECK-NOT: call void @is(i1 true) |
| 30 | ; CHECK: call void @is(i1 false) |
| 31 | define void @test2(i32 %a) { |
| 32 | %cmp1 = icmp ugt i32 %a, 5 |
| 33 | br i1 %cmp1, label %untaken, label %taken |
| 34 | |
| 35 | taken: |
| 36 | %cmp2 = icmp ugt i32 %a, 6 |
| 37 | br i1 %cmp2, label %istrue, label %isfalse |
| 38 | |
| 39 | istrue: |
| 40 | call void @is(i1 true) |
| 41 | ret void |
| 42 | |
| 43 | isfalse: |
| 44 | call void @is(i1 false) |
| 45 | ret void |
| 46 | |
| 47 | untaken: |
| 48 | ret void |
| 49 | } |
| 50 | |
| 51 | ; cmp1 implies cmp2 is false |
| 52 | ; CHECK-LABEL: @test3 |
| 53 | ; CHECK-NOT: call void @is(i1 true) |
| 54 | ; CHECK: call void @is(i1 false) |
| 55 | define void @test3(i32 %a) { |
| 56 | %cmp1 = icmp ugt i32 %a, 1 |
| 57 | br i1 %cmp1, label %taken, label %untaken |
| 58 | |
| 59 | taken: |
| 60 | %cmp2 = icmp eq i32 %a, 0 |
| 61 | br i1 %cmp2, label %istrue, label %isfalse |
| 62 | |
| 63 | istrue: |
| 64 | call void @is(i1 true) |
| 65 | ret void |
| 66 | |
| 67 | isfalse: |
| 68 | call void @is(i1 false) |
| 69 | ret void |
| 70 | |
| 71 | untaken: |
| 72 | ret void |
| 73 | } |
| 74 | |
| 75 | ; cmp1 implies cmp2 is true |
| 76 | ; CHECK-LABEL: @test4 |
| 77 | ; CHECK: call void @is(i1 true) |
| 78 | ; CHECK-NOT: call void @is(i1 false) |
| 79 | define void @test4(i32 %a) { |
| 80 | %cmp1 = icmp sgt i32 %a, 1 |
| 81 | br i1 %cmp1, label %taken, label %untaken |
| 82 | |
| 83 | taken: |
| 84 | %cmp2 = icmp ugt i32 %a, 0 |
| 85 | br i1 %cmp2, label %istrue, label %isfalse |
| 86 | |
| 87 | istrue: |
| 88 | call void @is(i1 true) |
| 89 | ret void |
| 90 | |
| 91 | isfalse: |
| 92 | call void @is(i1 false) |
| 93 | ret void |
| 94 | |
| 95 | untaken: |
| 96 | ret void |
| 97 | } |
| 98 | |
| 99 | ; cmp1 implies cmp2 is true |
| 100 | ; CHECK-LABEL: @test5 |
| 101 | ; CHECK: call void @is(i1 true) |
| 102 | ; CHECK-NOT: call void @is(i1 false) |
| 103 | define void @test5(i32 %a) { |
| 104 | %cmp1 = icmp sgt i32 %a, 5 |
| 105 | br i1 %cmp1, label %taken, label %untaken |
| 106 | |
| 107 | taken: |
| 108 | %cmp2 = icmp sgt i32 %a, -1 |
| 109 | br i1 %cmp2, label %istrue, label %isfalse |
| 110 | |
| 111 | istrue: |
| 112 | call void @is(i1 true) |
| 113 | ret void |
| 114 | |
| 115 | isfalse: |
| 116 | call void @is(i1 false) |
| 117 | ret void |
| 118 | |
| 119 | untaken: |
| 120 | ret void |
| 121 | } |
| 122 | |
| 123 | declare void @is(i1) |