| ; RUN: opt < %s -indvars -S | FileCheck %s |
| ; PR11350: Check that SimplifyIndvar handles a cycle of useless self-phis. |
| |
| ; CHECK-LABEL: @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 |
| } |