; LLVM IR from tangjz/acm-icpc :: self_training/2014-12-07 (A)

; 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"

@n = external dso_local global i32, align 4
@x = external dso_local global i32, align 4
@y = external dso_local global i32, align 4
@w = external dso_local global i32, align 4
@now = external dso_local global i32, align 4
@day = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 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
  br label %2

2:                                                ; preds = %32, %0
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef @x, ptr noundef @y, ptr noundef @w)
  %4 = icmp eq i32 %3, 4
  br i1 %4, label %5, label %36

5:                                                ; preds = %2
  store i32 0, ptr @day, align 4, !tbaa !5
  store i32 0, ptr @now, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %31, %5
  %7 = load i32, ptr @x, align 4, !tbaa !5
  %8 = load i32, ptr @y, align 4, !tbaa !5
  %9 = add nsw i32 %7, %8
  %10 = load i32, ptr @now, align 4, !tbaa !5
  %11 = add nsw i32 %10, %9
  store i32 %11, ptr @now, align 4, !tbaa !5
  %12 = load i32, ptr @w, align 4, !tbaa !5
  %13 = icmp sge i32 %12, 6
  br i1 %13, label %14, label %18

14:                                               ; preds = %6
  %15 = load i32, ptr @x, align 4, !tbaa !5
  %16 = load i32, ptr @now, align 4, !tbaa !5
  %17 = add nsw i32 %16, %15
  store i32 %17, ptr @now, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %14, %6
  %19 = load i32, ptr @day, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr @day, align 4, !tbaa !5
  %21 = load i32, ptr @now, align 4, !tbaa !5
  %22 = load i32, ptr @n, align 4, !tbaa !5
  %23 = icmp sge i32 %21, %22
  br i1 %23, label %24, label %25

24:                                               ; preds = %18
  br label %32

25:                                               ; preds = %18
  %26 = load i32, ptr @w, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr @w, align 4, !tbaa !5
  %28 = load i32, ptr @w, align 4, !tbaa !5
  %29 = icmp sgt i32 %28, 7
  br i1 %29, label %30, label %31

30:                                               ; preds = %25
  store i32 1, ptr @w, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %30, %25
  br label %6, !llvm.loop !9

32:                                               ; preds = %24
  %33 = load i32, ptr @day, align 4, !tbaa !5
  %34 = load i32, ptr @w, align 4, !tbaa !5
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %33, i32 noundef %34)
  br label %2, !llvm.loop !11

36:                                               ; preds = %2
  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"

@n = external dso_local global i32, align 4
@x = external dso_local global i32, align 4
@y = external dso_local global i32, align 4
@w = external dso_local global i32, align 4
@now = external dso_local local_unnamed_addr global i32, align 4
@day = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 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 @n, ptr noundef nonnull @x, ptr noundef nonnull @y, ptr noundef nonnull @w)
  %2 = icmp eq i32 %1, 4
  br i1 %2, label %.lr.ph11, label %._crit_edge12

.lr.ph11:                                         ; preds = %0, %17
  %.pr = load i32, ptr @w, align 4, !tbaa !5
  %3 = load i32, ptr @x, align 4, !tbaa !5
  %4 = load i32, ptr @y, align 4, !tbaa !5
  %5 = add nsw i32 %4, %3
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = icmp sgt i32 %.pr, 5
  %8 = select i1 %7, i32 %3, i32 0
  %spec.select4 = add nsw i32 %5, %8
  %.not5 = icmp slt i32 %spec.select4, %6
  br i1 %.not5, label %.lr.ph, label %17

.lr.ph:                                           ; preds = %.lr.ph11, %.lr.ph
  %9 = phi i32 [ %16, %.lr.ph ], [ 1, %.lr.ph11 ]
  %spec.select6 = phi i32 [ %spec.select, %.lr.ph ], [ %spec.select4, %.lr.ph11 ]
  %10 = phi i32 [ %spec.store.select, %.lr.ph ], [ %.pr, %.lr.ph11 ]
  %11 = add nsw i32 %10, 1
  %12 = icmp sgt i32 %10, 6
  %spec.store.select = select i1 %12, i32 1, i32 %11
  %13 = add nsw i32 %5, %spec.select6
  %14 = icmp sgt i32 %spec.store.select, 5
  %15 = select i1 %14, i32 %3, i32 0
  %spec.select = add nsw i32 %13, %15
  %16 = add nuw nsw i32 %9, 1
  %.not = icmp slt i32 %spec.select, %6
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  store i32 %spec.store.select, ptr @w, align 4
  br label %17

17:                                               ; preds = %._crit_edge, %.lr.ph11
  %.lcssa3 = phi i32 [ %16, %._crit_edge ], [ 1, %.lr.ph11 ]
  %spec.select.lcssa = phi i32 [ %spec.select, %._crit_edge ], [ %spec.select4, %.lr.ph11 ]
  %.lcssa1 = phi i32 [ %spec.store.select, %._crit_edge ], [ %.pr, %.lr.ph11 ]
  store i32 %spec.select.lcssa, ptr @now, align 4, !tbaa !5
  store i32 %.lcssa3, ptr @day, align 4, !tbaa !5
  %18 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %.lcssa3, i32 noundef %.lcssa1)
  %19 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull @x, ptr noundef nonnull @y, ptr noundef nonnull @w)
  %20 = icmp eq i32 %19, 4
  br i1 %20, label %.lr.ph11, label %._crit_edge12, !llvm.loop !11

._crit_edge12:                                    ; preds = %17, %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: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass