| Florian Hahn | 77382be | 2016-11-18 13:12:07 +0000 | [diff] [blame] | 1 | ; RUN: opt -loop-simplify -S < %s | FileCheck %s |
| 2 | |
| 3 | define void @test1(i32 %n) { |
| 4 | entry: |
| 5 | br label %while.cond |
| 6 | |
| 7 | while.cond: ; preds = %if.then, %if.else, %entry |
| 8 | %count.0 = phi i32 [ 0, %entry ], [ %add, %if.then ], [ %add2, %if.else ] |
| 9 | %cmp = icmp ugt i32 %count.0, %n |
| 10 | br i1 %cmp, label %while.end, label %while.body |
| 11 | |
| 12 | while.body: ; preds = %while.cond |
| 13 | %rem = and i32 %count.0, 1 |
| 14 | %cmp1 = icmp eq i32 %rem, 0 |
| 15 | br i1 %cmp1, label %if.then, label %if.else |
| 16 | |
| 17 | if.then: ; preds = %while.body |
| 18 | %add = add i32 %count.0, 1 |
| 19 | br label %while.cond, !llvm.loop !0 |
| 20 | |
| 21 | if.else: ; preds = %while.body |
| 22 | %add2 = add i32 %count.0, 2 |
| 23 | br label %while.cond, !llvm.loop !0 |
| 24 | |
| 25 | while.end: ; preds = %while.cond |
| 26 | ret void |
| 27 | } |
| 28 | |
| 29 | ; CHECK: if.then |
| 30 | ; CHECK-NOT: br {{.*}}!llvm.loop{{.*}} |
| 31 | |
| 32 | ; CHECK: while.cond.backedge: |
| 33 | ; CHECK: br label %while.cond, !llvm.loop !0 |
| 34 | |
| 35 | ; CHECK: if.else |
| 36 | ; CHECK-NOT: br {{.*}}!llvm.loop{{.*}} |
| 37 | |
| 38 | |
| 39 | !0 = distinct !{!0, !1} |
| 40 | !1 = !{!"llvm.loop.distribute.enable", i1 true} |
| 41 | ; CHECK: !0 = distinct !{!0, !1} |
| 42 | ; CHECK: !1 = !{!"llvm.loop.distribute.enable", i1 true} |