1*9880d681SAndroid Build Coastguard Worker; RUN: opt -S -simplifycfg < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Workerdefine zeroext i1 @test1(i32 %x) nounwind readnone ssp noredzone { 4*9880d681SAndroid Build Coastguard Workerentry: 5*9880d681SAndroid Build Coastguard Worker switch i32 %x, label %lor.rhs [ 6*9880d681SAndroid Build Coastguard Worker i32 2, label %lor.end 7*9880d681SAndroid Build Coastguard Worker i32 1, label %lor.end 8*9880d681SAndroid Build Coastguard Worker i32 3, label %lor.end 9*9880d681SAndroid Build Coastguard Worker ] 10*9880d681SAndroid Build Coastguard Worker 11*9880d681SAndroid Build Coastguard Workerlor.rhs: 12*9880d681SAndroid Build Coastguard Worker br label %lor.end 13*9880d681SAndroid Build Coastguard Worker 14*9880d681SAndroid Build Coastguard Workerlor.end: 15*9880d681SAndroid Build Coastguard Worker %0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ], [ true, %entry ] 16*9880d681SAndroid Build Coastguard Worker ret i1 %0 17*9880d681SAndroid Build Coastguard Worker 18*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1( 19*9880d681SAndroid Build Coastguard Worker; CHECK: %x.off = add i32 %x, -1 20*9880d681SAndroid Build Coastguard Worker; CHECK: %switch = icmp ult i32 %x.off, 3 21*9880d681SAndroid Build Coastguard Worker} 22*9880d681SAndroid Build Coastguard Worker 23*9880d681SAndroid Build Coastguard Workerdefine zeroext i1 @test2(i32 %x) nounwind readnone ssp noredzone { 24*9880d681SAndroid Build Coastguard Workerentry: 25*9880d681SAndroid Build Coastguard Worker switch i32 %x, label %lor.rhs [ 26*9880d681SAndroid Build Coastguard Worker i32 0, label %lor.end 27*9880d681SAndroid Build Coastguard Worker i32 1, label %lor.end 28*9880d681SAndroid Build Coastguard Worker ] 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Workerlor.rhs: 31*9880d681SAndroid Build Coastguard Worker br label %lor.end 32*9880d681SAndroid Build Coastguard Worker 33*9880d681SAndroid Build Coastguard Workerlor.end: 34*9880d681SAndroid Build Coastguard Worker %0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ] 35*9880d681SAndroid Build Coastguard Worker ret i1 %0 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test2( 38*9880d681SAndroid Build Coastguard Worker; CHECK: %switch = icmp ult i32 %x, 2 39*9880d681SAndroid Build Coastguard Worker} 40*9880d681SAndroid Build Coastguard Worker 41*9880d681SAndroid Build Coastguard Workerdefine i32 @test3(i1 %flag) { 42*9880d681SAndroid Build Coastguard Workerentry: 43*9880d681SAndroid Build Coastguard Worker switch i1 %flag, label %bad [ 44*9880d681SAndroid Build Coastguard Worker i1 true, label %good 45*9880d681SAndroid Build Coastguard Worker i1 false, label %good 46*9880d681SAndroid Build Coastguard Worker ] 47*9880d681SAndroid Build Coastguard Worker 48*9880d681SAndroid Build Coastguard Workergood: 49*9880d681SAndroid Build Coastguard Worker ret i32 0 50*9880d681SAndroid Build Coastguard Worker 51*9880d681SAndroid Build Coastguard Workerbad: 52*9880d681SAndroid Build Coastguard Worker ret i32 1 53*9880d681SAndroid Build Coastguard Worker 54*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test3( 55*9880d681SAndroid Build Coastguard Worker; CHECK: entry: 56*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: ret i32 0 57*9880d681SAndroid Build Coastguard Worker} 58