1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes='lower-switch,unify-loop-exits' -S | FileCheck %s 3 4define void @nested(i1 %PredB3, i1 %PredB4, i1 %PredA4, i1 %PredA3, i32 %X, i32 %Y, i32 %Z) { 5; CHECK-LABEL: @nested( 6; CHECK-NEXT: entry: 7; CHECK-NEXT: br label [[A1:%.*]] 8; CHECK: A1: 9; CHECK-NEXT: br label [[B1:%.*]] 10; CHECK: B1: 11; CHECK-NEXT: br label [[B2:%.*]] 12; CHECK: B2: 13; CHECK-NEXT: [[X_INC:%.*]] = add i32 [[X:%.*]], 1 14; CHECK-NEXT: br label [[B3:%.*]] 15; CHECK: B3: 16; CHECK-NEXT: br i1 [[PREDB3:%.*]], label [[B4:%.*]], label [[LOOP_EXIT_GUARD1:%.*]] 17; CHECK: B4: 18; CHECK-NEXT: br i1 [[PREDB4:%.*]], label [[B1]], label [[LOOP_EXIT_GUARD1]] 19; CHECK: A2: 20; CHECK-NEXT: br label [[A4:%.*]] 21; CHECK: A3: 22; CHECK-NEXT: br label [[A4]] 23; CHECK: A4: 24; CHECK-NEXT: [[A4_PHI:%.*]] = phi i32 [ [[Y:%.*]], [[A3:%.*]] ], [ [[X_INC_MOVED:%.*]], [[A2:%.*]] ] 25; CHECK-NEXT: br i1 [[PREDA4:%.*]], label [[LOOP_EXIT_GUARD:%.*]], label [[A5:%.*]] 26; CHECK: A5: 27; CHECK-NEXT: br i1 [[PREDA3:%.*]], label [[LOOP_EXIT_GUARD]], label [[A1]] 28; CHECK: C: 29; CHECK-NEXT: br label [[EXIT:%.*]] 30; CHECK: exit: 31; CHECK-NEXT: [[EXIT_PHI:%.*]] = phi i32 [ [[Z:%.*]], [[C:%.*]] ], [ [[EXIT_PHI_MOVED:%.*]], [[LOOP_EXIT_GUARD]] ] 32; CHECK-NEXT: ret void 33; CHECK: loop.exit.guard: 34; CHECK-NEXT: [[EXIT_PHI_MOVED]] = phi i32 [ poison, [[A4]] ], [ [[A4_PHI]], [[A5]] ] 35; CHECK-NEXT: [[GUARD_C:%.*]] = phi i1 [ true, [[A4]] ], [ false, [[A5]] ] 36; CHECK-NEXT: br i1 [[GUARD_C]], label [[C]], label [[EXIT]] 37; CHECK: loop.exit.guard1: 38; CHECK-NEXT: [[X_INC_MOVED]] = phi i32 [ [[X_INC]], [[B3]] ], [ [[X_INC]], [[B4]] ] 39; CHECK-NEXT: [[GUARD_A3:%.*]] = phi i1 [ true, [[B3]] ], [ false, [[B4]] ] 40; CHECK-NEXT: br i1 [[GUARD_A3]], label [[A3]], label [[A2]] 41; 42entry: 43 br label %A1 44 45A1: 46 br label %B1 47 48B1: 49 br label %B2 50 51B2: 52 %X.inc = add i32 %X, 1 53 br label %B3 54 55B3: 56 br i1 %PredB3, label %B4, label %A3 57 58B4: 59 br i1 %PredB4, label %B1, label %A2 60 61A2: 62 br label %A4 63 64A3: 65 br label %A4 66 67A4: 68 %A4.phi = phi i32 [%Y, %A3], [%X.inc, %A2] 69 br i1 %PredA4, label %C, label %A5 70 71A5: 72 br i1 %PredA3, label %exit, label %A1 73 74C: 75 br label %exit 76 77exit: 78 %exit.phi = phi i32 [%A4.phi, %A5], [%Z, %C] 79 ret void 80} 81