; LLVM IR from tangjz/acm-icpc :: codechef/SEPT18 (MAGICHF)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@x = external dso_local global i32, align 4
@y = external dso_local global i32, align 4
@z = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  %2 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @t)
  br label %3

3:                                                ; preds = %28, %0
  %4 = load i32, ptr @t, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr @t, align 4, !tbaa !5
  %6 = icmp ne i32 %4, 0
  br i1 %6, label %7, label %31

7:                                                ; preds = %3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef @n, ptr noundef @x, ptr noundef @m)
  br label %9

9:                                                ; preds = %27, %7
  %10 = load i32, ptr @m, align 4, !tbaa !5
  %11 = add nsw i32 %10, -1
  store i32 %11, ptr @m, align 4, !tbaa !5
  %12 = icmp ne i32 %10, 0
  br i1 %12, label %13, label %28

13:                                               ; preds = %9
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef @y, ptr noundef @z)
  %15 = load i32, ptr @x, align 4, !tbaa !5
  %16 = load i32, ptr @y, align 4, !tbaa !5
  %17 = icmp eq i32 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %13
  %19 = load i32, ptr @z, align 4, !tbaa !5
  store i32 %19, ptr @x, align 4, !tbaa !5
  br label %27

20:                                               ; preds = %13
  %21 = load i32, ptr @x, align 4, !tbaa !5
  %22 = load i32, ptr @z, align 4, !tbaa !5
  %23 = icmp eq i32 %21, %22
  br i1 %23, label %24, label %26

24:                                               ; preds = %20
  %25 = load i32, ptr @y, align 4, !tbaa !5
  store i32 %25, ptr @x, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %24, %20
  br label %27

27:                                               ; preds = %26, %18
  br label %9, !llvm.loop !9

28:                                               ; preds = %9
  %29 = load i32, ptr @x, align 4, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %29)
  br label %3, !llvm.loop !11

31:                                               ; preds = %3
  ret i32 0
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #1

declare i32 @printf(ptr noundef, ...) #1

attributes #0 = { mustprogress norecurse uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@m = external dso_local global i32, align 4
@x = external dso_local global i32, align 4
@y = external dso_local global i32, align 4
@z = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @t)
  %2 = load i32, ptr @t, align 4, !tbaa !5
  %3 = add nsw i32 %2, -1
  store i32 %3, ptr @t, align 4, !tbaa !5
  %.not4 = icmp eq i32 %2, 0
  br i1 %.not4, label %._crit_edge7, label %.lr.ph6

.lr.ph6:                                          ; preds = %0, %._crit_edge
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @n, ptr noundef nonnull @x, ptr noundef nonnull @m)
  %5 = load i32, ptr @m, align 4, !tbaa !5
  %6 = add nsw i32 %5, -1
  store i32 %6, ptr @m, align 4, !tbaa !5
  %.not23 = icmp eq i32 %5, 0
  br i1 %.not23, label %.lr.ph6.._crit_edge_crit_edge, label %.lr.ph

.lr.ph6.._crit_edge_crit_edge:                    ; preds = %.lr.ph6
  %.pre = load i32, ptr @x, align 4, !tbaa !5
  br label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph6, %14
  %7 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull @y, ptr noundef nonnull @z)
  %8 = load i32, ptr @x, align 4, !tbaa !5
  %9 = load i32, ptr @y, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  %11 = load i32, ptr @z, align 4, !tbaa !5
  br i1 %10, label %.sink.split, label %12

12:                                               ; preds = %.lr.ph
  %13 = icmp eq i32 %8, %11
  br i1 %13, label %.sink.split, label %14

.sink.split:                                      ; preds = %12, %.lr.ph
  %.sink = phi i32 [ %11, %.lr.ph ], [ %9, %12 ]
  store i32 %.sink, ptr @x, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %.sink.split, %12
  %15 = phi i32 [ %8, %12 ], [ %.sink, %.sink.split ]
  %16 = load i32, ptr @m, align 4, !tbaa !5
  %17 = add nsw i32 %16, -1
  store i32 %17, ptr @m, align 4, !tbaa !5
  %.not2 = icmp eq i32 %16, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %14, %.lr.ph6.._crit_edge_crit_edge
  %18 = phi i32 [ %.pre, %.lr.ph6.._crit_edge_crit_edge ], [ %15, %14 ]
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %18)
  %20 = load i32, ptr @t, align 4, !tbaa !5
  %21 = add nsw i32 %20, -1
  store i32 %21, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %20, 0
  br i1 %.not, label %._crit_edge7, label %.lr.ph6, !llvm.loop !11

._crit_edge7:                                     ; preds = %._crit_edge, %0
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { mustprogress nofree norecurse nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nofree nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass