1*9880d681SAndroid Build Coastguard Worker; RUN: opt -indvars -S < %s | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker; indvars will try to replace %b.0.lcssa with %t.1. If it does this, 6*9880d681SAndroid Build Coastguard Worker; it will break LCSSA. 7*9880d681SAndroid Build Coastguard Worker 8*9880d681SAndroid Build Coastguard Worker@c = external global i32, align 4 9*9880d681SAndroid Build Coastguard Worker 10*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @fn1 11*9880d681SAndroid Build Coastguard Workerdefine void @fn1() { 12*9880d681SAndroid Build Coastguard Workerentry: 13*9880d681SAndroid Build Coastguard Worker br label %for.body 14*9880d681SAndroid Build Coastguard Worker 15*9880d681SAndroid Build Coastguard Workerfor.cond1.preheader: ; preds = %for.body 16*9880d681SAndroid Build Coastguard Worker %0 = load i32, i32* @c, align 4 17*9880d681SAndroid Build Coastguard Worker br i1 undef, label %for.cond1.us.preheader, label %for.cond1 18*9880d681SAndroid Build Coastguard Worker 19*9880d681SAndroid Build Coastguard Workerfor.cond1.us.preheader: ; preds = %for.cond1.preheader 20*9880d681SAndroid Build Coastguard Worker br label %for.cond1.us 21*9880d681SAndroid Build Coastguard Worker 22*9880d681SAndroid Build Coastguard Workerfor.cond1.us: ; preds = %for.cond1.us, %for.cond1.us.preheader 23*9880d681SAndroid Build Coastguard Worker br label %for.cond1.us 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerfor.body: ; preds = %for.body, %entry 26*9880d681SAndroid Build Coastguard Worker br i1 undef, label %for.body, label %for.cond1.preheader 27*9880d681SAndroid Build Coastguard Worker 28*9880d681SAndroid Build Coastguard Workerfor.cond1: ; preds = %for.cond1.preheader 29*9880d681SAndroid Build Coastguard Worker br i1 true, label %for.body9.lr.ph, label %for.cond13.preheader 30*9880d681SAndroid Build Coastguard Worker 31*9880d681SAndroid Build Coastguard Workerfor.body9.lr.ph: ; preds = %for.cond1 32*9880d681SAndroid Build Coastguard Worker br i1 undef, label %for.body9.us.preheader, label %for.body9 33*9880d681SAndroid Build Coastguard Worker 34*9880d681SAndroid Build Coastguard Workerfor.body9.us.preheader: ; preds = %for.body9.lr.ph 35*9880d681SAndroid Build Coastguard Worker br label %for.body9.us 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Workerfor.body9.us: ; preds = %for.body9.us, %for.body9.us.preheader 38*9880d681SAndroid Build Coastguard Worker br label %for.body9.us 39*9880d681SAndroid Build Coastguard Worker 40*9880d681SAndroid Build Coastguard Workerfor.cond13.preheader: ; preds = %for.body9, %for.cond1 41*9880d681SAndroid Build Coastguard Worker %b.0.lcssa = phi i32 [ %0, %for.body9 ], [ 0, %for.cond1 ] 42*9880d681SAndroid Build Coastguard Worker br label %for.cond13 43*9880d681SAndroid Build Coastguard Worker 44*9880d681SAndroid Build Coastguard Workerfor.body9: ; preds = %for.body9.lr.ph 45*9880d681SAndroid Build Coastguard Worker br label %for.cond13.preheader 46*9880d681SAndroid Build Coastguard Worker 47*9880d681SAndroid Build Coastguard Workerfor.cond13: ; preds = %for.cond13, %for.cond13.preheader 48*9880d681SAndroid Build Coastguard Worker %d.1 = phi i32 [ %t.1, %for.cond13 ], [ %0, %for.cond13.preheader ] 49*9880d681SAndroid Build Coastguard Worker %t.1 = phi i32 [ %b.0.lcssa, %for.cond13 ], [ %0, %for.cond13.preheader ] 50*9880d681SAndroid Build Coastguard Worker br i1 undef, label %for.cond18.preheader, label %for.cond13 51*9880d681SAndroid Build Coastguard Worker 52*9880d681SAndroid Build Coastguard Workerfor.cond18.preheader: ; preds = %for.cond13 53*9880d681SAndroid Build Coastguard Worker br label %for.cond18 54*9880d681SAndroid Build Coastguard Worker 55*9880d681SAndroid Build Coastguard Workerfor.cond18: ; preds = %for.cond18, %for.cond18.preheader 56*9880d681SAndroid Build Coastguard Worker %b.1 = phi i32 [ %xor, %for.cond18 ], [ %b.0.lcssa, %for.cond18.preheader ] 57*9880d681SAndroid Build Coastguard Worker %add = add nsw i32 %b.1, %d.1 58*9880d681SAndroid Build Coastguard Worker %xor = xor i32 %add, %b.1 59*9880d681SAndroid Build Coastguard Worker br label %for.cond18 60*9880d681SAndroid Build Coastguard Worker} 61