; RUN: opt -loop-reduce -S < %s | FileCheck %s ; ; Segmentation fault: 11 in LoopStrengthReduce target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" target triple = "x86_64-apple-darwin10.0.0" ; IVUsers should not consider tmp128 a valid user because it is not in a ; simplified loop nest. ; CHECK-LABEL: @nopreheader( ; CHECK: for.cond: ; CHECK: %tmp128 = add i64 %0, %indvar65 define void @nopreheader(i8* %cmd) nounwind ssp { entry: indirectbr i8* undef, [label %while.cond] while.cond: ; preds = %while.body, %entry %0 = phi i64 [ %indvar.next48, %while.body ], [ 0, %entry ] indirectbr i8* undef, [label %while.end, label %while.body] while.body: ; preds = %lor.rhs, %lor.lhs.false17, %lor.lhs.false11, %lor.lhs.false, %land.rhs %indvar.next48 = add i64 %0, 1 indirectbr i8* undef, [label %while.cond] while.end: ; preds = %lor.rhs, %while.cond indirectbr i8* undef, [label %if.end152] if.end152: ; preds = %lor.lhs.false144, %if.end110 indirectbr i8* undef, [label %lor.lhs.false184, label %for.cond] lor.lhs.false184: ; preds = %lor.lhs.false177 indirectbr i8* undef, [label %return, label %for.cond] for.cond: ; preds = %for.inc, %lor.lhs.false184, %if.end152 %indvar65 = phi i64 [ %indvar.next66, %for.inc ], [ 0, %lor.lhs.false184 ], [ 0, %if.end152 ] %tmp128 = add i64 %0, %indvar65 %s.4 = getelementptr i8, i8* %cmd, i64 %tmp128 %tmp195 = load i8, i8* %s.4, align 1 indirectbr i8* undef, [label %return, label %land.rhs198] land.rhs198: ; preds = %for.cond indirectbr i8* undef, [label %return, label %for.inc] for.inc: ; preds = %lor.rhs234, %land.lhs.true228, %land.lhs.true216, %land.lhs.true204 %indvar.next66 = add i64 %indvar65, 1 indirectbr i8* undef, [label %for.cond] return: ; preds = %if.end677, %doshell, %if.then96 ret void } ; Another case with a dominating loop that does not contain the IV ; User. Just make sure it doesn't assert. define void @nopreheader2() nounwind ssp { entry: indirectbr i8* undef, [label %while.cond, label %return] while.cond: ; preds = %while.cond.backedge, %entry indirectbr i8* undef, [label %while.cond.backedge, label %lor.rhs] lor.rhs: ; preds = %while.cond indirectbr i8* undef, [label %while.cond.backedge, label %while.end] while.cond.backedge: ; preds = %lor.rhs, %while.cond indirectbr i8* undef, [label %while.cond] while.end: ; preds = %lor.rhs indirectbr i8* undef, [label %if.then18, label %return] if.then18: ; preds = %while.end indirectbr i8* undef, [label %if.end35, label %lor.lhs.false] lor.lhs.false: ; preds = %if.then18 indirectbr i8* undef, [label %if.end35, label %return] if.end35: ; preds = %lor.lhs.false, %if.then18 indirectbr i8* undef, [label %while.cond36] while.cond36: ; preds = %while.body49, %if.end35 %0 = phi i64 [ %indvar.next13, %while.body49 ], [ 0, %if.end35 ] indirectbr i8* undef, [label %while.body49, label %lor.rhs42] lor.rhs42: ; preds = %while.cond36 indirectbr i8* undef, [label %while.body49, label %while.end52] while.body49: ; preds = %lor.rhs42, %while.cond36 %indvar.next13 = add i64 %0, 1 indirectbr i8* undef, [label %while.cond36] while.end52: ; preds = %lor.rhs42 indirectbr i8* undef, [label %land.lhs.true, label %return] land.lhs.true: ; preds = %while.end52 indirectbr i8* undef, [label %while.cond66.preheader, label %return] while.cond66.preheader: ; preds = %land.lhs.true indirectbr i8* undef, [label %while.cond66] while.cond66: ; preds = %while.body77, %while.cond66.preheader indirectbr i8* undef, [label %land.rhs, label %while.cond81.preheader] land.rhs: ; preds = %while.cond66 indirectbr i8* undef, [label %while.body77, label %while.cond81.preheader] while.cond81.preheader: ; preds = %land.rhs, %while.cond66 %tmp45 = add i64 undef, %0 %tmp46 = add i64 %tmp45, undef indirectbr i8* undef, [label %while.cond81] while.body77: ; preds = %land.rhs indirectbr i8* undef, [label %while.cond66] while.cond81: ; preds = %while.body94, %while.cond81.preheader %tmp25 = add i64 %tmp46, undef indirectbr i8* undef, [label %while.body94, label %lor.rhs87] lor.rhs87: ; preds = %while.cond81 indirectbr i8* undef, [label %while.body94, label %return] while.body94: ; preds = %lor.rhs87, %while.cond81 indirectbr i8* undef, [label %while.cond81] return: ; preds = %if.end216, %land.lhs.true183, %land.lhs.true, %while.end52, %lor.lhs.false, %while.end, %entry ret void } ; Test a phi operand IV User dominated by a no-preheader loop. define void @nopreheader3() nounwind uwtable ssp align 2 { entry: indirectbr i8* blockaddress(@nopreheader3, %if.end10), [label %if.end22, label %if.end10] if.end10: ; preds = %entry indirectbr i8* blockaddress(@nopreheader3, %if.end6.i), [label %if.end22, label %if.end6.i] if.end6.i: ; preds = %if.end10 indirectbr i8* blockaddress(@nopreheader3, %while.cond2.preheader.i.i), [label %if.then12, label %while.cond2.preheader.i.i] while.cond2.preheader.i.i: ; preds = %while.end.i18.i, %if.end6.i indirectbr i8* blockaddress(@nopreheader3, %while.cond2.i.i), [label %while.cond2.i.i] while.cond2.i.i: ; preds = %while.cond2.i.i, %while.cond2.preheader.i.i %i1.1.i14.i = phi i32 [ %add.i15.i, %while.cond2.i.i ], [ undef, %while.cond2.preheader.i.i ] %add.i15.i = add nsw i32 %i1.1.i14.i, undef indirectbr i8* blockaddress(@nopreheader3, %while.end.i18.i), [label %while.cond2.i.i, label %while.end.i18.i] while.end.i18.i: ; preds = %while.cond2.i.i indirectbr i8* blockaddress(@nopreheader3, %while.cond2.preheader.i.i), [label %if.then12, label %while.cond2.preheader.i.i] if.then12: ; preds = %while.end.i18.i, %if.end6.i %i1.0.lcssa.i.i = phi i32 [ undef, %if.end6.i ], [ %i1.1.i14.i, %while.end.i18.i ] indirectbr i8* blockaddress(@nopreheader3, %if.end22), [label %if.end22] if.end22: ; preds = %if.then12, %if.end10, %entry ret void }