1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 ; PR11350: Check that SimplifyIndvar handles a cycle of useless self-phis. 3 4 ; CHECK-LABEL: @test( 5 ; CHECK-NOT: lcssa = phi 6 define void @test() nounwind { 7 entry: 8 br label %for.cond.preheader 9 10 for.cond.preheader: ; preds = %entry 11 br label %for.cond.outer 12 13 for.cond.outer: ; preds = %for.cond.preheader, %for.end 14 %p_41.addr.0.ph = phi i32 [ %p_41.addr.1.lcssa, %for.end ], [ 1, %for.cond.preheader ] 15 br label %for.cond 16 17 for.cond: 18 br i1 true, label %for.end, label %for.ph 19 20 for.ph: ; preds = %for.cond4.preheader 21 br label %for.end 22 23 for.end: 24 %p_41.addr.1.lcssa = phi i32 [ undef, %for.ph ], [ %p_41.addr.0.ph, %for.cond ] 25 %p_68.lobit.i = lshr i32 %p_41.addr.1.lcssa, 31 26 %cmp7 = icmp eq i32 %p_41.addr.1.lcssa, 0 27 %conv8 = zext i1 %cmp7 to i32 28 br label %for.cond.outer 29 } 30
