| Nick Lewycky | 8d302df | 2011-12-26 20:54:14 +0000 | [diff] [blame] | 1 | ; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s |
| 2 | |
| 3 | declare void @helper(i32) |
| 4 | |
| 5 | define void @test1(i1 %a, i1 %b) { |
| Benjamin Kramer | aca1885 | 2012-01-05 00:43:34 +0000 | [diff] [blame] | 6 | ; CHECK: @test1 |
| Nick Lewycky | 8d302df | 2011-12-26 20:54:14 +0000 | [diff] [blame] | 7 | entry: |
| 8 | br i1 %a, label %Y, label %X, !prof !0 |
| 9 | ; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !0 |
| 10 | |
| 11 | X: |
| 12 | %c = or i1 %b, false |
| Nick Lewycky | c554a9b | 2011-12-27 04:31:52 +0000 | [diff] [blame] | 13 | br i1 %c, label %Z, label %Y, !prof !1 |
| 14 | |
| 15 | Y: |
| 16 | call void @helper(i32 0) |
| 17 | ret void |
| 18 | |
| 19 | Z: |
| 20 | call void @helper(i32 1) |
| 21 | ret void |
| 22 | } |
| 23 | |
| 24 | define void @test2(i1 %a, i1 %b) { |
| 25 | ; CHECK: @test2 |
| 26 | entry: |
| 27 | br i1 %a, label %X, label %Y, !prof !1 |
| 28 | ; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !1 |
| 29 | ; CHECK-NOT: !prof |
| 30 | |
| 31 | X: |
| 32 | %c = or i1 %b, false |
| 33 | br i1 %c, label %Z, label %Y, !prof !2 |
| 34 | |
| 35 | Y: |
| 36 | call void @helper(i32 0) |
| 37 | ret void |
| 38 | |
| 39 | Z: |
| 40 | call void @helper(i32 1) |
| 41 | ret void |
| 42 | } |
| 43 | |
| 44 | define void @test3(i1 %a, i1 %b) { |
| 45 | ; CHECK: @test3 |
| 46 | ; CHECK-NOT: !prof |
| 47 | entry: |
| 48 | br i1 %a, label %X, label %Y, !prof !1 |
| 49 | |
| 50 | X: |
| 51 | %c = or i1 %b, false |
| Nick Lewycky | 8d302df | 2011-12-26 20:54:14 +0000 | [diff] [blame] | 52 | br i1 %c, label %Z, label %Y |
| 53 | |
| 54 | Y: |
| 55 | call void @helper(i32 0) |
| 56 | ret void |
| 57 | |
| 58 | Z: |
| 59 | call void @helper(i32 1) |
| 60 | ret void |
| 61 | } |
| 62 | |
| Nick Lewycky | c554a9b | 2011-12-27 04:31:52 +0000 | [diff] [blame] | 63 | define void @test4(i1 %a, i1 %b) { |
| 64 | ; CHECK: @test4 |
| 65 | ; CHECK-NOT: !prof |
| 66 | entry: |
| 67 | br i1 %a, label %X, label %Y |
| Nick Lewycky | 8d302df | 2011-12-26 20:54:14 +0000 | [diff] [blame] | 68 | |
| Nick Lewycky | c554a9b | 2011-12-27 04:31:52 +0000 | [diff] [blame] | 69 | X: |
| 70 | %c = or i1 %b, false |
| 71 | br i1 %c, label %Z, label %Y, !prof !1 |
| 72 | |
| 73 | Y: |
| 74 | call void @helper(i32 0) |
| 75 | ret void |
| 76 | |
| 77 | Z: |
| 78 | call void @helper(i32 1) |
| 79 | ret void |
| 80 | } |
| 81 | |
| Manman Ren | 49dbe25 | 2012-09-12 17:04:11 +0000 | [diff] [blame] | 82 | ;; test5 - The case where it jumps to the default target will be removed. |
| 83 | define void @test5(i32 %M, i32 %N) nounwind uwtable { |
| 84 | entry: |
| 85 | switch i32 %N, label %sw2 [ |
| 86 | i32 1, label %sw2 |
| 87 | i32 2, label %sw.bb |
| 88 | i32 3, label %sw.bb1 |
| 89 | ], !prof !3 |
| 90 | ; CHECK: test5 |
| 91 | ; CHECK: switch i32 %N, label %sw2 [ |
| 92 | ; CHECK: i32 3, label %sw.bb1 |
| 93 | ; CHECK: i32 2, label %sw.bb |
| 94 | ; CHECK: ], !prof !2 |
| 95 | |
| 96 | sw.bb: |
| 97 | call void @helper(i32 0) |
| 98 | br label %sw.epilog |
| 99 | |
| 100 | sw.bb1: |
| 101 | call void @helper(i32 1) |
| 102 | br label %sw.epilog |
| 103 | |
| 104 | sw2: |
| 105 | call void @helper(i32 2) |
| 106 | br label %sw.epilog |
| 107 | |
| 108 | sw.epilog: |
| 109 | ret void |
| 110 | } |
| 111 | |
| Manman Ren | 8691e52 | 2012-09-14 21:53:06 +0000 | [diff] [blame^] | 112 | ;; test6 - Some cases of the second switch are pruned during optimization. |
| 113 | ;; Then the second switch will be converted to a branch, finally, the first |
| 114 | ;; switch and the branch will be merged into a single switch. |
| 115 | define void @test6(i32 %M, i32 %N) nounwind uwtable { |
| 116 | entry: |
| 117 | switch i32 %N, label %sw2 [ |
| 118 | i32 1, label %sw2 |
| 119 | i32 2, label %sw.bb |
| 120 | i32 3, label %sw.bb1 |
| 121 | ], !prof !4 |
| 122 | ; CHECK: test6 |
| 123 | ; CHECK: switch i32 %N, label %sw.epilog |
| 124 | ; CHECK: i32 3, label %sw.bb1 |
| 125 | ; CHECK: i32 2, label %sw.bb |
| 126 | ; CHECK: i32 4, label %sw.bb5 |
| 127 | ; CHECK: ], !prof !3 |
| 128 | |
| 129 | sw.bb: |
| 130 | call void @helper(i32 0) |
| 131 | br label %sw.epilog |
| 132 | |
| 133 | sw.bb1: |
| 134 | call void @helper(i32 1) |
| 135 | br label %sw.epilog |
| 136 | |
| 137 | sw2: |
| 138 | ;; Here "case 2" is invalidated since the default case of the first switch |
| 139 | ;; does not include "case 2". |
| 140 | switch i32 %N, label %sw.epilog [ |
| 141 | i32 2, label %sw.bb4 |
| 142 | i32 4, label %sw.bb5 |
| 143 | ], !prof !5 |
| 144 | |
| 145 | sw.bb4: |
| 146 | call void @helper(i32 2) |
| 147 | br label %sw.epilog |
| 148 | |
| 149 | sw.bb5: |
| 150 | call void @helper(i32 3) |
| 151 | br label %sw.epilog |
| 152 | |
| 153 | sw.epilog: |
| 154 | ret void |
| 155 | } |
| 156 | |
| Nick Lewycky | c554a9b | 2011-12-27 04:31:52 +0000 | [diff] [blame] | 157 | !0 = metadata !{metadata !"branch_weights", i32 3, i32 5} |
| 158 | !1 = metadata !{metadata !"branch_weights", i32 1, i32 1} |
| 159 | !2 = metadata !{metadata !"branch_weights", i32 1, i32 2} |
| Manman Ren | 49dbe25 | 2012-09-12 17:04:11 +0000 | [diff] [blame] | 160 | !3 = metadata !{metadata !"branch_weights", i32 4, i32 3, i32 2, i32 1} |
| Manman Ren | 8691e52 | 2012-09-14 21:53:06 +0000 | [diff] [blame^] | 161 | !4 = metadata !{metadata !"branch_weights", i32 4, i32 3, i32 2, i32 1} |
| 162 | !5 = metadata !{metadata !"branch_weights", i32 7, i32 6, i32 5} |
| Nick Lewycky | c554a9b | 2011-12-27 04:31:52 +0000 | [diff] [blame] | 163 | |
| 164 | ; CHECK: !0 = metadata !{metadata !"branch_weights", i32 5, i32 11} |
| 165 | ; CHECK: !1 = metadata !{metadata !"branch_weights", i32 1, i32 5} |
| Manman Ren | 49dbe25 | 2012-09-12 17:04:11 +0000 | [diff] [blame] | 166 | ; CHECK: !2 = metadata !{metadata !"branch_weights", i32 7, i32 1, i32 2} |
| Manman Ren | 8691e52 | 2012-09-14 21:53:06 +0000 | [diff] [blame^] | 167 | ; CHECK: !3 = metadata !{metadata !"branch_weights", i32 49, i32 12, i32 24, i32 35} |
| 168 | ; CHECK-NOT: !4 |