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1; LoopSimplify is breaking LICM on this testcase because the exit blocks from2; the loop are reachable from more than just the exit nodes: the exit blocks3; have predecessors from outside of the loop!4;5; This is distilled from a monsterous crafty example.6 7; RUN: opt < %s -passes=licm -disable-output8 9 10@G = weak global i32 0 ; <ptr> [#uses=7]11 12define i32 @main() {13entry:14 store i32 123, ptr @G15 br label %loopentry.i16loopentry.i: ; preds = %endif.1.i, %entry17 %tmp.0.i = load i32, ptr @G ; <i32> [#uses=1]18 %tmp.1.i = icmp eq i32 %tmp.0.i, 123 ; <i1> [#uses=1]19 br i1 %tmp.1.i, label %Out.i, label %endif.0.i20endif.0.i: ; preds = %loopentry.i21 %tmp.3.i = load i32, ptr @G ; <i32> [#uses=1]22 %tmp.4.i = icmp eq i32 %tmp.3.i, 126 ; <i1> [#uses=1]23 br i1 %tmp.4.i, label %ExitBlock.i, label %endif.1.i24endif.1.i: ; preds = %endif.0.i25 %tmp.6.i = load i32, ptr @G ; <i32> [#uses=1]26 %inc.i = add i32 %tmp.6.i, 1 ; <i32> [#uses=1]27 store i32 %inc.i, ptr @G28 br label %loopentry.i29Out.i: ; preds = %loopentry.i30 store i32 0, ptr @G31 br label %ExitBlock.i32ExitBlock.i: ; preds = %Out.i, %endif.0.i33 %tmp.7.i = load i32, ptr @G ; <i32> [#uses=1]34 ret i32 %tmp.7.i35}36 37