; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/200 Division 1/D/D.ll (Z9update_upii)

; 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
@pos = external dso_local global [524288 x i32], align 16
@chainId = external dso_local global [524288 x i32], align 16
@chainHead = external dso_local global [524288 x i32], align 16
@par = external dso_local global [524288 x i32], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z6updateiiiiii(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9update_upii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %26, %2
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp eq i32 %10, %14
  br i1 %15, label %16, label %26

16:                                               ; preds = %6
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr @n, align 4, !tbaa !5
  call void @_Z6updateiiiiii(i32 noundef %20, i32 noundef %24, i32 noundef -1, i32 noundef 1, i32 noundef 1, i32 noundef %25)
  ret void

26:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [524288 x i32], ptr @chainHead, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %5, align 4, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = load i32, ptr @n, align 4, !tbaa !5
  call void @_Z6updateiiiiii(i32 noundef %37, i32 noundef %41, i32 noundef -1, i32 noundef 1, i32 noundef 1, i32 noundef %42)
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [524288 x i32], ptr @par, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  store i32 %46, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %6, !llvm.loop !9
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
attributes #2 = { 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"

@n = external dso_local local_unnamed_addr global i32, align 4
@pos = external dso_local local_unnamed_addr global [524288 x i32], align 16
@chainId = external dso_local local_unnamed_addr global [524288 x i32], align 16
@chainHead = external dso_local local_unnamed_addr global [524288 x i32], align 16
@par = external dso_local local_unnamed_addr global [524288 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z6updateiiiiii(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9update_upii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %1 to i64
  %4 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %3
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp eq i32 %7, %8
  br i1 %9, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.lcssa9 = phi i64 [ %5, %2 ], [ %28, %.lr.ph ]
  %10 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %3
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %.lcssa9
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr @n, align 4, !tbaa !5
  tail call void @_Z6updateiiiiii(i32 noundef %11, i32 noundef %13, i32 noundef -1, i32 noundef 1, i32 noundef 1, i32 noundef %14)
  ret void

.lr.ph:                                           ; preds = %2, %.lr.ph
  %15 = phi i32 [ %30, %.lr.ph ], [ %7, %2 ]
  %16 = phi i64 [ %28, %.lr.ph ], [ %5, %2 ]
  %17 = sext i32 %15 to i64
  %18 = getelementptr inbounds [524288 x i32], ptr @chainHead, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = getelementptr inbounds [524288 x i32], ptr @pos, i64 0, i64 %16
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr @n, align 4, !tbaa !5
  tail call void @_Z6updateiiiiii(i32 noundef %22, i32 noundef %24, i32 noundef -1, i32 noundef 1, i32 noundef 1, i32 noundef %25)
  %26 = getelementptr inbounds [524288 x i32], ptr @par, i64 0, i64 %20
  %27 = load i32, ptr %26, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [524288 x i32], ptr @chainId, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = icmp eq i32 %30, %31
  br i1 %32, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

attributes #0 = { 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,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass