| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt -loop-simplify -S < %s | FileCheck %s |
| 2 | |
| 3 | ; CHECK-LABEL: @test1 |
| 4 | define void @test1(i32 %n) { |
| 5 | entry: |
| 6 | br label %while.cond |
| 7 | |
| 8 | while.cond: ; preds = %if.then, %if.else, %entry |
| 9 | %count.0 = phi i32 [ 0, %entry ], [ %add, %if.then ], [ %add2, %if.else ] |
| 10 | %cmp = icmp ugt i32 %count.0, %n |
| 11 | br i1 %cmp, label %while.end, label %while.body |
| 12 | |
| 13 | while.body: ; preds = %while.cond |
| 14 | %rem = and i32 %count.0, 1 |
| 15 | %cmp1 = icmp eq i32 %rem, 0 |
| 16 | br i1 %cmp1, label %if.then, label %if.else |
| 17 | |
| 18 | if.then: ; preds = %while.body |
| 19 | %add = add i32 %count.0, 1 |
| 20 | br label %while.cond, !llvm.loop !0 |
| 21 | |
| 22 | if.else: ; preds = %while.body |
| 23 | %add2 = add i32 %count.0, 2 |
| 24 | br label %while.cond, !llvm.loop !0 |
| 25 | |
| 26 | while.end: ; preds = %while.cond |
| 27 | ret void |
| 28 | } |
| 29 | |
| 30 | ; CHECK: if.then |
| 31 | ; CHECK-NOT: br {{.*}}!llvm.loop{{.*}} |
| 32 | |
| 33 | ; CHECK: while.cond.backedge: |
| 34 | ; CHECK: br label %while.cond, !llvm.loop !0 |
| 35 | |
| 36 | ; CHECK: if.else |
| 37 | ; CHECK-NOT: br {{.*}}!llvm.loop{{.*}} |
| 38 | |
| 39 | ; CHECK-LABEL: @test2 |
| 40 | ; CHECK: for.body: |
| 41 | ; CHECK: br i1 %{{.*}}, label %for.body, label %cleanup.loopexit, !llvm.loop !0 |
| 42 | define void @test2(i32 %k) { |
| 43 | entry: |
| 44 | %cmp9 = icmp sgt i32 %k, 0 |
| 45 | br i1 %cmp9, label %for.body.preheader, label %cleanup |
| 46 | |
| 47 | for.body.preheader: ; preds = %entry |
| 48 | br label %for.body |
| 49 | |
| 50 | for.cond: ; preds = %for.body |
| 51 | %cmp = icmp slt i32 %inc, %k |
| 52 | br i1 %cmp, label %for.body, label %cleanup.loopexit, !llvm.loop !0 |
| 53 | |
| 54 | for.body: ; preds = %for.body.preheader, %for.cond |
| 55 | %i.010 = phi i32 [ %inc, %for.cond ], [ 0, %for.body.preheader ] |
| 56 | %cmp3 = icmp sgt i32 %i.010, 3 |
| 57 | %inc = add nsw i32 %i.010, 1 |
| 58 | br i1 %cmp3, label %cleanup.loopexit, label %for.cond |
| 59 | |
| 60 | cleanup.loopexit: ; preds = %for.body, %for.cond |
| 61 | br label %cleanup |
| 62 | |
| 63 | cleanup: ; preds = %cleanup.loopexit, %entry |
| 64 | ret void |
| 65 | } |
| 66 | |
| 67 | !0 = distinct !{!0, !1} |
| 68 | !1 = !{!"llvm.loop.distribute.enable", i1 true} |
| 69 | ; CHECK: !0 = distinct !{!0, !1} |
| 70 | ; CHECK: !1 = !{!"llvm.loop.distribute.enable", i1 true} |