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      1 ; RUN: llc < %s -march=x86-64 >/dev/null
      2 
      3 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"
      4 
      5 define void @test0() nounwind {
      6 if.end90.i.i:
      7   br label %while.body.i.i221.i
      8 
      9 while.body.i.i221.i:                              ; preds = %while.cond.backedge.i.i.i, %if.end90.i.i
     10   br i1 undef, label %if.then.i.i224.i, label %while.cond.backedge.i.i.i
     11 
     12 while.cond.backedge.i.i.i:                        ; preds = %for.end.i.i.i, %while.body.i.i221.i
     13   br label %while.body.i.i221.i
     14 
     15 if.then.i.i224.i:                                 ; preds = %while.body.i.i221.i
     16   switch i32 undef, label %for.cond.i.i226.i [
     17     i32 92, label %sw.bb.i.i225.i
     18     i32 34, label %sw.bb.i.i225.i
     19     i32 110, label %sw.bb21.i.i.i
     20   ]
     21 
     22 sw.bb.i.i225.i:                                   ; preds = %if.then.i.i224.i, %if.then.i.i224.i
     23   unreachable
     24 
     25 sw.bb21.i.i.i:                                    ; preds = %if.then.i.i224.i
     26   unreachable
     27 
     28 for.cond.i.i226.i:                                ; preds = %for.body.i.i.i, %if.then.i.i224.i
     29   %0 = phi i64 [ %tmp154.i.i.i, %for.body.i.i.i ], [ 0, %if.then.i.i224.i ] ; <i64> [#uses=2]
     30   %tmp154.i.i.i = add i64 %0, 1                   ; <i64> [#uses=2]
     31   %i.0.i.i.i = trunc i64 %0 to i32                ; <i32> [#uses=1]
     32   br i1 undef, label %land.rhs.i.i.i, label %for.end.i.i.i
     33 
     34 land.rhs.i.i.i:                                   ; preds = %for.cond.i.i226.i
     35   br i1 undef, label %for.body.i.i.i, label %for.end.i.i.i
     36 
     37 for.body.i.i.i:                                   ; preds = %land.rhs.i.i.i
     38   br label %for.cond.i.i226.i
     39 
     40 for.end.i.i.i:                                    ; preds = %land.rhs.i.i.i, %for.cond.i.i226.i
     41   %idx.ext.i.i.i = sext i32 %i.0.i.i.i to i64     ; <i64> [#uses=1]
     42   %sub.ptr72.sum.i.i.i = xor i64 %idx.ext.i.i.i, -1 ; <i64> [#uses=1]
     43   %pos.addr.1.sum155.i.i.i = add i64 %tmp154.i.i.i, %sub.ptr72.sum.i.i.i ; <i64> [#uses=1]
     44   %arrayidx76.i.i.i = getelementptr inbounds i8, i8* undef, i64 %pos.addr.1.sum155.i.i.i ; <i8*> [#uses=0]
     45   br label %while.cond.backedge.i.i.i
     46 }
     47 
     48 define void @test1() nounwind {
     49 entry:
     50   %t = shl i32 undef, undef                     ; <i32> [#uses=1]
     51   %t9 = sub nsw i32 0, %t                     ; <i32> [#uses=1]
     52   br label %outer
     53 
     54 outer:                                             ; preds = %bb18, %bb
     55   %i12 = phi i32 [ %t21, %bb18 ], [ 0, %entry ]  ; <i32> [#uses=2]
     56   %i13 = phi i32 [ %t20, %bb18 ], [ 0, %entry ]  ; <i32> [#uses=2]
     57   br label %inner
     58 
     59 inner:                                             ; preds = %bb16, %bb11
     60   %t17 = phi i32 [ %i13, %outer ], [ undef, %inner ] ; <i32> [#uses=1]
     61   store i32 %t17, i32* undef
     62   br i1 undef, label %bb18, label %inner
     63 
     64 bb18:                                             ; preds = %bb16
     65   %t19 = add i32 %i13, %t9                 ; <i32> [#uses=1]
     66   %t20 = add i32 %t19, %i12                 ; <i32> [#uses=1]
     67   %t21 = add i32 %i12, 1                      ; <i32> [#uses=1]
     68   br label %outer
     69 }
     70