1*9880d681SAndroid Build Coastguard Worker; REQUIRES: asserts 2*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -loop-unswitch -stats -disable-output 2>&1 | grep "1 loop-unswitch - Number of branches unswitched" | count 1 3*9880d681SAndroid Build Coastguard Worker; PR 3170 4*9880d681SAndroid Build Coastguard Workerdefine i32 @a(i32 %x, i32 %y) nounwind { 5*9880d681SAndroid Build Coastguard Workerentry: 6*9880d681SAndroid Build Coastguard Worker %0 = icmp ult i32 0, %y ; <i1> [#uses=1] 7*9880d681SAndroid Build Coastguard Worker br i1 %0, label %bb.nph, label %bb4 8*9880d681SAndroid Build Coastguard Worker 9*9880d681SAndroid Build Coastguard Workerbb.nph: ; preds = %entry 10*9880d681SAndroid Build Coastguard Worker %1 = icmp eq i32 %x, 0 ; <i1> [#uses=1] 11*9880d681SAndroid Build Coastguard Worker br label %bb 12*9880d681SAndroid Build Coastguard Worker 13*9880d681SAndroid Build Coastguard Workerbb: ; preds = %bb.nph, %bb3 14*9880d681SAndroid Build Coastguard Worker %i.01 = phi i32 [ %3, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=1] 15*9880d681SAndroid Build Coastguard Worker br i1 %1, label %bb2, label %bb1 16*9880d681SAndroid Build Coastguard Worker 17*9880d681SAndroid Build Coastguard Workerbb1: ; preds = %bb 18*9880d681SAndroid Build Coastguard Worker %2 = tail call i32 (...) @b() nounwind ; <i32> [#uses=0] 19*9880d681SAndroid Build Coastguard Worker br label %bb2 20*9880d681SAndroid Build Coastguard Worker 21*9880d681SAndroid Build Coastguard Workerbb2: ; preds = %bb, %bb1 22*9880d681SAndroid Build Coastguard Worker %3 = add i32 %i.01, 1 ; <i32> [#uses=2] 23*9880d681SAndroid Build Coastguard Worker br label %bb3 24*9880d681SAndroid Build Coastguard Worker 25*9880d681SAndroid Build Coastguard Workerbb3: ; preds = %bb2 26*9880d681SAndroid Build Coastguard Worker %i.0 = phi i32 [ %3, %bb2 ] ; <i32> [#uses=1] 27*9880d681SAndroid Build Coastguard Worker %4 = icmp ult i32 %i.0, %y ; <i1> [#uses=1] 28*9880d681SAndroid Build Coastguard Worker br i1 %4, label %bb, label %bb3.bb4_crit_edge 29*9880d681SAndroid Build Coastguard Worker 30*9880d681SAndroid Build Coastguard Workerbb3.bb4_crit_edge: ; preds = %bb3 31*9880d681SAndroid Build Coastguard Worker br label %bb4 32*9880d681SAndroid Build Coastguard Worker 33*9880d681SAndroid Build Coastguard Workerbb4: ; preds = %bb3.bb4_crit_edge, %entry 34*9880d681SAndroid Build Coastguard Worker ret i32 0 35*9880d681SAndroid Build Coastguard Worker} 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Workerdeclare i32 @b(...) 38