; LLVM IR from tangjz/acm-icpc :: codeforces/complete (1030B)

; 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
@d = 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
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 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 @n, ptr noundef @d, ptr noundef @m)
  br label %3

3:                                                ; preds = %31, %0
  %4 = load i32, ptr @m, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  store i32 %5, ptr @m, align 4, !tbaa !5
  %6 = icmp ne i32 %4, 0
  br i1 %6, label %7, label %36

7:                                                ; preds = %3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef @x, ptr noundef @y)
  %9 = load i32, ptr @d, align 4, !tbaa !5
  %10 = load i32, ptr @x, align 4, !tbaa !5
  %11 = load i32, ptr @y, align 4, !tbaa !5
  %12 = add nsw i32 %10, %11
  %13 = icmp sle i32 %9, %12
  br i1 %13, label %14, label %31

14:                                               ; preds = %7
  %15 = load i32, ptr @x, align 4, !tbaa !5
  %16 = load i32, ptr @y, align 4, !tbaa !5
  %17 = add nsw i32 %15, %16
  %18 = load i32, ptr @n, align 4, !tbaa !5
  %19 = load i32, ptr @n, align 4, !tbaa !5
  %20 = add nsw i32 %18, %19
  %21 = load i32, ptr @d, align 4, !tbaa !5
  %22 = sub nsw i32 %20, %21
  %23 = icmp sle i32 %17, %22
  br i1 %23, label %24, label %31

24:                                               ; preds = %14
  %25 = load i32, ptr @x, align 4, !tbaa !5
  %26 = load i32, ptr @y, align 4, !tbaa !5
  %27 = sub nsw i32 %25, %26
  %28 = call i32 @llvm.abs.i32(i32 %27, i1 true)
  %29 = load i32, ptr @d, align 4, !tbaa !5
  %30 = icmp sle i32 %28, %29
  br label %31

31:                                               ; preds = %24, %14, %7
  %32 = phi i1 [ false, %14 ], [ false, %7 ], [ %30, %24 ]
  %33 = zext i1 %32 to i64
  %34 = select i1 %32, ptr @.str.2, ptr @.str.3
  %35 = call i32 @puts(ptr noundef %34)
  br label %3, !llvm.loop !9

36:                                               ; preds = %3
  ret i32 0
}

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

declare i32 @puts(ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #2

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" }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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"}


; 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
@d = 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
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 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 @d, ptr noundef nonnull @m)
  %2 = load i32, ptr @m, align 4, !tbaa !5
  %3 = add nsw i32 %2, -1
  store i32 %3, ptr @m, align 4, !tbaa !5
  %.not5 = icmp eq i32 %2, 0
  br i1 %.not5, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %.thread
  %4 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull @x, ptr noundef nonnull @y)
  %5 = load i32, ptr @d, align 4, !tbaa !5
  %6 = load i32, ptr @x, align 4, !tbaa !5
  %7 = load i32, ptr @y, align 4, !tbaa !5
  %8 = add nsw i32 %7, %6
  %.not2 = icmp sgt i32 %5, %8
  br i1 %.not2, label %.thread, label %9

9:                                                ; preds = %.lr.ph
  %10 = load i32, ptr @n, align 4, !tbaa !5
  %11 = shl nsw i32 %10, 1
  %12 = sub nsw i32 %11, %5
  %.not3 = icmp sgt i32 %8, %12
  br i1 %.not3, label %.thread, label %13

13:                                               ; preds = %9
  %14 = sub nsw i32 %6, %7
  %15 = tail call i32 @llvm.abs.i32(i32 %14, i1 true)
  %16 = icmp sle i32 %15, %5
  %cond.fr = freeze i1 %16
  %spec.select = select i1 %cond.fr, ptr @.str.2, ptr @.str.3
  br label %.thread

.thread:                                          ; preds = %13, %.lr.ph, %9
  %17 = phi ptr [ @.str.3, %9 ], [ @.str.3, %.lr.ph ], [ %spec.select, %13 ]
  %18 = tail call i32 @puts(ptr noundef nonnull dereferenceable(1) %17)
  %19 = load i32, ptr @m, align 4, !tbaa !5
  %20 = add nsw i32 %19, -1
  store i32 %20, ptr @m, align 4, !tbaa !5
  %.not = icmp eq i32 %19, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.thread, %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 @puts(ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #2

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" }
attributes #2 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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"}


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