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      1 ; RUN: llc < %s -mtriple=armv7-apple-darwin -O3 -mcpu=arm1136jf-s
      2 ; PR7421
      3 
      4 %struct.CONTENTBOX = type { i32, i32, i32, i32, i32 }
      5 %struct.FILE = type { i8* }
      6 %struct.tilebox = type { %struct.tilebox*, double, double, double, double, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
      7 %struct.UNCOMBOX = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }
      8 %struct.cellbox = type { i8*, i32, i32, i32, [9 x i32], i32, i32, i32, i32, i32, i32, i32, double, double, double, double, double, i32, i32, %struct.CONTENTBOX*, %struct.UNCOMBOX*, [8 x %struct.tilebox*] }
      9 %struct.termbox = type { %struct.termbox*, i32, i32, i32, i32, i32 }
     10 
     11 @.str2708 = external constant [14 x i8], align 4  ; <[14 x i8]*> [#uses=1]
     12 
     13 define void @TW_oldinput(%struct.FILE* nocapture %fp) nounwind {
     14 entry:
     15   %xcenter = alloca i32, align 4                  ; <i32*> [#uses=2]
     16   %0 = call i32 (%struct.FILE*, i8*, ...)* @fscanf(%struct.FILE* %fp, i8* getelementptr inbounds ([14 x i8]* @.str2708, i32 0, i32 0), i32* undef, i32* undef, i32* %xcenter, i32* null) nounwind ; <i32> [#uses=1]
     17   %1 = icmp eq i32 %0, 4                          ; <i1> [#uses=1]
     18   br i1 %1, label %bb, label %return
     19 
     20 bb:                                               ; preds = %bb445, %entry
     21   %2 = load %struct.cellbox** undef, align 4      ; <%struct.cellbox*> [#uses=2]
     22   %3 = getelementptr inbounds %struct.cellbox* %2, i32 0, i32 3 ; <i32*> [#uses=1]
     23   store i32 undef, i32* %3, align 4
     24   %4 = load i32* undef, align 4                   ; <i32> [#uses=3]
     25   %5 = icmp eq i32 undef, 1                       ; <i1> [#uses=1]
     26   br i1 %5, label %bb10, label %bb445
     27 
     28 bb10:                                             ; preds = %bb
     29   br i1 undef, label %bb11, label %bb445
     30 
     31 bb11:                                             ; preds = %bb10
     32   %6 = load %struct.tilebox** undef, align 4      ; <%struct.tilebox*> [#uses=3]
     33   %7 = load %struct.termbox** null, align 4       ; <%struct.termbox*> [#uses=1]
     34   %8 = getelementptr inbounds %struct.tilebox* %6, i32 0, i32 13 ; <i32*> [#uses=1]
     35   %9 = load i32* %8, align 4                      ; <i32> [#uses=3]
     36   %10 = getelementptr inbounds %struct.tilebox* %6, i32 0, i32 15 ; <i32*> [#uses=1]
     37   %11 = load i32* %10, align 4                    ; <i32> [#uses=1]
     38   br i1 false, label %bb12, label %bb13
     39 
     40 bb12:                                             ; preds = %bb11
     41   unreachable
     42 
     43 bb13:                                             ; preds = %bb11
     44   %iftmp.40.0.neg = sdiv i32 0, -2                ; <i32> [#uses=2]
     45   %12 = sub nsw i32 0, %9                         ; <i32> [#uses=1]
     46   %13 = sitofp i32 %12 to double                  ; <double> [#uses=1]
     47   %14 = fdiv double %13, 0.000000e+00             ; <double> [#uses=1]
     48   %15 = fptosi double %14 to i32                  ; <i32> [#uses=1]
     49   %iftmp.41.0.in = add i32 0, %15                 ; <i32> [#uses=1]
     50   %iftmp.41.0.neg = sdiv i32 %iftmp.41.0.in, -2   ; <i32> [#uses=3]
     51   br i1 undef, label %bb43.loopexit, label %bb21
     52 
     53 bb21:                                             ; preds = %bb13
     54   %16 = fptosi double undef to i32                ; <i32> [#uses=1]
     55   %17 = fsub double undef, 0.000000e+00           ; <double> [#uses=1]
     56   %not.460 = fcmp oge double %17, 5.000000e-01    ; <i1> [#uses=1]
     57   %18 = zext i1 %not.460 to i32                   ; <i32> [#uses=1]
     58   %iftmp.42.0 = add i32 %16, %iftmp.41.0.neg      ; <i32> [#uses=1]
     59   %19 = add i32 %iftmp.42.0, %18                  ; <i32> [#uses=1]
     60   store i32 %19, i32* undef, align 4
     61   %20 = sub nsw i32 0, %9                         ; <i32> [#uses=1]
     62   %21 = sitofp i32 %20 to double                  ; <double> [#uses=1]
     63   %22 = fdiv double %21, 0.000000e+00             ; <double> [#uses=2]
     64   %23 = fptosi double %22 to i32                  ; <i32> [#uses=1]
     65   %24 = fsub double %22, undef                    ; <double> [#uses=1]
     66   %not.461 = fcmp oge double %24, 5.000000e-01    ; <i1> [#uses=1]
     67   %25 = zext i1 %not.461 to i32                   ; <i32> [#uses=1]
     68   %iftmp.43.0 = add i32 %23, %iftmp.41.0.neg      ; <i32> [#uses=1]
     69   %26 = add i32 %iftmp.43.0, %25                  ; <i32> [#uses=1]
     70   %27 = getelementptr inbounds %struct.tilebox* %6, i32 0, i32 10 ; <i32*> [#uses=1]
     71   store i32 %26, i32* %27, align 4
     72   %28 = fptosi double undef to i32                ; <i32> [#uses=1]
     73   %iftmp.45.0 = add i32 %28, %iftmp.40.0.neg      ; <i32> [#uses=1]
     74   %29 = add i32 %iftmp.45.0, 0                    ; <i32> [#uses=1]
     75   store i32 %29, i32* undef, align 4
     76   br label %bb43.loopexit
     77 
     78 bb36:                                             ; preds = %bb43.loopexit, %bb36
     79   %termptr.0478 = phi %struct.termbox* [ %42, %bb36 ], [ %7, %bb43.loopexit ] ; <%struct.termbox*> [#uses=1]
     80   %30 = load i32* undef, align 4                  ; <i32> [#uses=1]
     81   %31 = sub nsw i32 %30, %9                       ; <i32> [#uses=1]
     82   %32 = sitofp i32 %31 to double                  ; <double> [#uses=1]
     83   %33 = fdiv double %32, 0.000000e+00             ; <double> [#uses=1]
     84   %34 = fptosi double %33 to i32                  ; <i32> [#uses=1]
     85   %iftmp.46.0 = add i32 %34, %iftmp.41.0.neg      ; <i32> [#uses=1]
     86   %35 = add i32 %iftmp.46.0, 0                    ; <i32> [#uses=1]
     87   store i32 %35, i32* undef, align 4
     88   %36 = sub nsw i32 0, %11                        ; <i32> [#uses=1]
     89   %37 = sitofp i32 %36 to double                  ; <double> [#uses=1]
     90   %38 = fmul double %37, 0.000000e+00             ; <double> [#uses=1]
     91   %39 = fptosi double %38 to i32                  ; <i32> [#uses=1]
     92   %iftmp.47.0 = add i32 %39, %iftmp.40.0.neg      ; <i32> [#uses=1]
     93   %40 = add i32 %iftmp.47.0, 0                    ; <i32> [#uses=1]
     94   store i32 %40, i32* undef, align 4
     95   %41 = getelementptr inbounds %struct.termbox* %termptr.0478, i32 0, i32 0 ; <%struct.termbox**> [#uses=1]
     96   %42 = load %struct.termbox** %41, align 4       ; <%struct.termbox*> [#uses=2]
     97   %43 = icmp eq %struct.termbox* %42, null        ; <i1> [#uses=1]
     98   br i1 %43, label %bb52.loopexit, label %bb36
     99 
    100 bb43.loopexit:                                    ; preds = %bb21, %bb13
    101   br i1 undef, label %bb52.loopexit, label %bb36
    102 
    103 bb52.loopexit:                                    ; preds = %bb43.loopexit, %bb36
    104   %44 = icmp eq i32 %4, 0                         ; <i1> [#uses=1]
    105   br i1 %44, label %bb.nph485, label %bb54
    106 
    107 bb54:                                             ; preds = %bb52.loopexit
    108   switch i32 %4, label %bb62 [
    109     i32 2, label %bb56
    110     i32 3, label %bb57
    111   ]
    112 
    113 bb56:                                             ; preds = %bb54
    114   br label %bb62
    115 
    116 bb57:                                             ; preds = %bb54
    117   br label %bb62
    118 
    119 bb62:                                             ; preds = %bb57, %bb56, %bb54
    120   unreachable
    121 
    122 bb.nph485:                                        ; preds = %bb52.loopexit
    123   br label %bb248
    124 
    125 bb248:                                            ; preds = %bb322, %bb.nph485
    126   %45 = icmp eq i32 undef, %4                     ; <i1> [#uses=1]
    127   br i1 %45, label %bb322, label %bb249
    128 
    129 bb249:                                            ; preds = %bb248
    130   %46 = getelementptr inbounds %struct.cellbox* %2, i32 0, i32 21, i32 undef ; <%struct.tilebox**> [#uses=1]
    131   %47 = load %struct.tilebox** %46, align 4       ; <%struct.tilebox*> [#uses=1]
    132   %48 = getelementptr inbounds %struct.tilebox* %47, i32 0, i32 11 ; <i32*> [#uses=1]
    133   store i32 undef, i32* %48, align 4
    134   unreachable
    135 
    136 bb322:                                            ; preds = %bb248
    137   br i1 undef, label %bb248, label %bb445
    138 
    139 bb445:                                            ; preds = %bb322, %bb10, %bb
    140   %49 = call i32 (%struct.FILE*, i8*, ...)* @fscanf(%struct.FILE* %fp, i8* getelementptr inbounds ([14 x i8]* @.str2708, i32 0, i32 0), i32* undef, i32* undef, i32* %xcenter, i32* null) nounwind ; <i32> [#uses=1]
    141   %50 = icmp eq i32 %49, 4                        ; <i1> [#uses=1]
    142   br i1 %50, label %bb, label %return
    143 
    144 return:                                           ; preds = %bb445, %entry
    145   ret void
    146 }
    147 
    148 declare i32 @fscanf(%struct.FILE* nocapture, i8* nocapture, ...) nounwind
    149