+; RUN: opt < %s -indvars -S | FileCheck %s
+; PR11350: Check that SimplifyIndvar handles a cycle of useless self-phis.
+
+; CHECK: @test
+; CHECK-NOT: lcssa = phi
+define void @test() nounwind {
+entry:
+ br label %for.cond.preheader
+
+for.cond.preheader: ; preds = %entry
+ br label %for.cond.outer
+
+for.cond.outer: ; preds = %for.cond.preheader, %for.end
+ %p_41.addr.0.ph = phi i32 [ %p_41.addr.1.lcssa, %for.end ], [ 1, %for.cond.preheader ]
+ br label %for.cond
+
+for.cond:
+ br i1 true, label %for.end, label %for.ph
+
+for.ph: ; preds = %for.cond4.preheader
+ br label %for.end
+
+for.end:
+ %p_41.addr.1.lcssa = phi i32 [ undef, %for.ph ], [ %p_41.addr.0.ph, %for.cond ]
+ %p_68.lobit.i = lshr i32 %p_41.addr.1.lcssa, 31
+ %cmp7 = icmp eq i32 %p_41.addr.1.lcssa, 0
+ %conv8 = zext i1 %cmp7 to i32
+ br label %for.cond.outer
+}