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      1 ; RUN: llc < %s -mtriple=x86_64-apple-darwin
      2 
      3         %struct._Unwind_Context = type {  }
      4 
      5 define i32 @execute_stack_op(i8* %op_ptr, i8* %op_end, %struct._Unwind_Context* %context, i64 %initial) {
      6 entry:
      7         br i1 false, label %bb, label %return
      8 
      9 bb:             ; preds = %bb31, %entry
     10         br i1 false, label %bb6, label %bb31
     11 
     12 bb6:            ; preds = %bb
     13         %tmp10 = load i64* null, align 8                ; <i64> [#uses=1]
     14         %tmp16 = load i64* null, align 8                ; <i64> [#uses=1]
     15         br i1 false, label %bb23, label %bb31
     16 
     17 bb23:           ; preds = %bb6
     18         %tmp2526.cast = and i64 %tmp16, 4294967295              ; <i64> [#uses=1]
     19         %tmp27 = ashr i64 %tmp10, %tmp2526.cast         ; <i64> [#uses=1]
     20         br label %bb31
     21 
     22 bb31:           ; preds = %bb23, %bb6, %bb
     23         %result.0 = phi i64 [ %tmp27, %bb23 ], [ 0, %bb ], [ 0, %bb6 ]          ; <i64> [#uses=0]
     24         br i1 false, label %bb, label %return
     25 
     26 return:         ; preds = %bb31, %entry
     27         ret i32 undef
     28 }
     29