; LLVM IR from lzyrapx/Competitive-Programming :: ACdream/1017（网络流sap）.ll (Z3sapv)

; 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"

@K = external dso_local global i32, align 4
@S = external dso_local global i32, align 4
@N = external dso_local global i32, align 4
@h = external dso_local global [50010 x i32], align 16
@vh = external dso_local global [50010 x i32], align 16

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3DFSii(i32 noundef, i32 noundef) #2

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z3sapv() #2 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 16 @h, i8 0, i64 200040, i1 false)
  call void @llvm.memset.p0.i64(ptr align 16 @vh, i8 0, i64 200040, i1 false)
  %2 = load i32, ptr @N, align 4, !tbaa !5
  store i32 %2, ptr @vh, align 16, !tbaa !5
  br label %3

3:                                                ; preds = %10, %0
  %4 = load i32, ptr @S, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds [50010 x i32], ptr @h, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr @N, align 4, !tbaa !5
  %9 = icmp slt i32 %7, %8
  br i1 %9, label %10, label %15

10:                                               ; preds = %3
  %11 = load i32, ptr @S, align 4, !tbaa !5
  %12 = call noundef i32 @_Z3DFSii(i32 noundef %11, i32 noundef 1000000000)
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = add nsw i32 %13, %12
  store i32 %14, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !9

15:                                               ; preds = %3
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = load i32, ptr @K, align 4, !tbaa !5
  %18 = icmp eq i32 %16, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret i1 %18
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 #3 = { nounwind }

!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"

@K = external dso_local local_unnamed_addr global i32, align 4
@S = external dso_local local_unnamed_addr global i32, align 4
@N = external dso_local local_unnamed_addr global i32, align 4
@h = external dso_local local_unnamed_addr global [50010 x i32], align 16
@vh = external dso_local local_unnamed_addr global [50010 x i32], align 16

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z3DFSii(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z3sapv() local_unnamed_addr #1 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(200040) @h, i8 0, i64 200040, i1 false)
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(200040) @vh, i8 0, i64 200040, i1 false)
  %1 = load i32, ptr @N, align 4, !tbaa !5
  store i32 %1, ptr @vh, align 16, !tbaa !5
  %2 = load i32, ptr @S, align 4, !tbaa !5
  %3 = sext i32 %2 to i64
  %4 = getelementptr inbounds [50010 x i32], ptr @h, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp slt i32 %5, %1
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %7 = phi i32 [ %10, %.lr.ph ], [ %2, %0 ]
  %.02 = phi i32 [ %9, %.lr.ph ], [ 0, %0 ]
  %8 = tail call noundef i32 @_Z3DFSii(i32 noundef %7, i32 noundef 1000000000)
  %9 = add nsw i32 %8, %.02
  %10 = load i32, ptr @S, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [50010 x i32], ptr @h, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr @N, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.0.lcssa = phi i32 [ 0, %0 ], [ %9, %.lr.ph ]
  %16 = load i32, ptr @K, align 4, !tbaa !5
  %17 = icmp eq i32 %.0.lcssa, %16
  ret i1 %17
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { mustprogress 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" }

!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,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass