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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 62; RUN: opt -passes=gvn -S -o - %s | FileCheck %s3 4; If a branch has two identical successors, we cannot declare either dead.5define void @widget(i1 %p) {6; CHECK-LABEL: define void @widget(7; CHECK-SAME: i1 [[P:%.*]]) {8; CHECK-NEXT: [[ENTRY:.*]]:9; CHECK-NEXT: br label %[[BB2:.*]]10; CHECK: [[BB2]]:11; CHECK-NEXT: [[T1:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[T2:%.*]], %[[BB7:.*]] ]12; CHECK-NEXT: [[T2]] = add i64 [[T1]], 113; CHECK-NEXT: [[T3:%.*]] = icmp ult i64 0, [[T2]]14; CHECK-NEXT: br i1 [[T3]], label %[[BB3:.*]], label %[[BB4:.*]]15; CHECK: [[BB3]]:16; CHECK-NEXT: [[T4:%.*]] = call i64 @f()17; CHECK-NEXT: br label %[[BB4]]18; CHECK: [[BB4]]:19; CHECK-NEXT: [[FOO:%.*]] = phi i64 [ [[T4]], %[[BB3]] ], [ 0, %[[BB2]] ]20; CHECK-NEXT: br i1 [[P]], label %[[BB5:.*]], label %[[BB6:.*]]21; CHECK: [[BB5]]:22; CHECK-NEXT: br i1 true, label %[[BB7]], label %[[BB7]]23; CHECK: [[BB6]]:24; CHECK-NEXT: br i1 true, label %[[BB7]], label %[[BB7]]25; CHECK: [[BB7]]:26; CHECK-NEXT: br i1 [[P]], label %[[BB2]], label %[[BB8:.*]]27; CHECK: [[BB8]]:28; CHECK-NEXT: ret void29;30entry:31 br label %bb232 33bb2:34 %t1 = phi i64 [ 0, %entry ], [ %t5, %bb7 ]35 %t2 = add i64 %t1, 136 %t3 = icmp ult i64 0, %t237 br i1 %t3, label %bb3, label %bb438 39bb3:40 %t4 = call i64 @f()41 br label %bb442 43bb4:44 %foo = phi i64 [ %t4, %bb3 ], [ 0, %bb2 ]45 br i1 %p, label %bb5, label %bb646 47bb5:48 br i1 true, label %bb7, label %bb749 50bb6:51 br i1 true, label %bb7, label %bb752 53bb7:54 %t5 = add i64 %t1, 155 br i1 %p, label %bb2, label %bb856 57bb8:58 ret void59}60 61declare i64 @f()62