1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -loop-simplify -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Worker; Make sure the preheader exists. 4*9880d681SAndroid Build Coastguard Worker; CHECK: sw.bb103: 5*9880d681SAndroid Build Coastguard Worker; CHECK: indirectbr {{.*}}label %while.cond112 6*9880d681SAndroid Build Coastguard Worker; CHECK: while.cond112: 7*9880d681SAndroid Build Coastguard Worker; But the tail is not split. 8*9880d681SAndroid Build Coastguard Worker; CHECK: for.body: 9*9880d681SAndroid Build Coastguard Worker; CHECK: indirectbr {{.*}}label %while.cond112 10*9880d681SAndroid Build Coastguard Workerdefine fastcc void @build_regex_nfa() nounwind uwtable ssp { 11*9880d681SAndroid Build Coastguard Workerentry: 12*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %while.cond), [label %while.cond] 13*9880d681SAndroid Build Coastguard Worker 14*9880d681SAndroid Build Coastguard Workerwhile.cond: ; preds = %if.then439, %entry 15*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %sw.bb103), [label %do.body785, label %sw.bb103] 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Workersw.bb103: ; preds = %while.body 18*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %while.cond112), [label %while.cond112] 19*9880d681SAndroid Build Coastguard Worker 20*9880d681SAndroid Build Coastguard Workerwhile.cond112: ; preds = %for.body, %for.cond.preheader, %sw.bb103 21*9880d681SAndroid Build Coastguard Worker %pc.0 = phi i8 [ -1, %sw.bb103 ], [ 0, %for.body ], [ %pc.0, %for.cond.preheader ] 22*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %Lsetdone), [label %sw.bb118, label %Lsetdone] 23*9880d681SAndroid Build Coastguard Worker 24*9880d681SAndroid Build Coastguard Workersw.bb118: ; preds = %while.cond112 25*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %for.cond.preheader), [label %Lerror.loopexit, label %for.cond.preheader] 26*9880d681SAndroid Build Coastguard Worker 27*9880d681SAndroid Build Coastguard Workerfor.cond.preheader: ; preds = %sw.bb118 28*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %for.body), [label %while.cond112, label %for.body] 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Workerfor.body: ; preds = %for.body, %for.cond.preheader 31*9880d681SAndroid Build Coastguard Worker indirectbr i8* blockaddress(@build_regex_nfa, %for.body), [label %while.cond112, label %for.body] 32*9880d681SAndroid Build Coastguard Worker 33*9880d681SAndroid Build Coastguard WorkerLsetdone: ; preds = %while.cond112 34*9880d681SAndroid Build Coastguard Worker unreachable 35*9880d681SAndroid Build Coastguard Worker 36*9880d681SAndroid Build Coastguard Workerdo.body785: ; preds = %while.cond, %while.body 37*9880d681SAndroid Build Coastguard Worker ret void 38*9880d681SAndroid Build Coastguard Worker 39*9880d681SAndroid Build Coastguard WorkerLerror.loopexit: ; preds = %sw.bb118 40*9880d681SAndroid Build Coastguard Worker unreachable 41*9880d681SAndroid Build Coastguard Worker} 42