; LLVM IR from Tunghohin/Competitive_Coding :: Codeforces/cf1674_F.ll (Z6modifyiix)

; 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
@m = external dso_local global i32, align 4
@tr = external dso_local global [1010 x [1010 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7low_biti(i32 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6modifyiix(i32 noundef %0, i32 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %10, ptr %7, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %39, %3
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr @n, align 4, !tbaa !5
  %14 = icmp sle i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  store i32 2, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %44

16:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %17 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %17, ptr %9, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %33, %16
  %19 = load i32, ptr %9, align 4, !tbaa !5
  %20 = load i32, ptr @m, align 4, !tbaa !5
  %21 = icmp sle i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  store i32 5, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %38

23:                                               ; preds = %18
  %24 = load i64, ptr %6, align 8, !tbaa !9
  %25 = load i32, ptr %7, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [1010 x [1010 x i64]], ptr @tr, i64 0, i64 %26
  %28 = load i32, ptr %9, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [1010 x i64], ptr %27, i64 0, i64 %29
  %31 = load i64, ptr %30, align 8, !tbaa !9
  %32 = add nsw i64 %31, %24
  store i64 %32, ptr %30, align 8, !tbaa !9
  br label %33

33:                                               ; preds = %23
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = call noundef i32 @_Z7low_biti(i32 noundef %34)
  %36 = load i32, ptr %9, align 4, !tbaa !5
  %37 = add nsw i32 %36, %35
  store i32 %37, ptr %9, align 4, !tbaa !5
  br label %18, !llvm.loop !11

38:                                               ; preds = %22
  br label %39

39:                                               ; preds = %38
  %40 = load i32, ptr %7, align 4, !tbaa !5
  %41 = call noundef i32 @_Z7low_biti(i32 noundef %40)
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = add nsw i32 %42, %41
  store i32 %43, ptr %7, align 4, !tbaa !5
  br label %11, !llvm.loop !13

44:                                               ; preds = %15
  ret void
}

; 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

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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
@m = external dso_local local_unnamed_addr global i32, align 4
@tr = external dso_local local_unnamed_addr global [1010 x [1010 x i64]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z7low_biti(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6modifyiix(i32 noundef %0, i32 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = load i32, ptr @n, align 4, !tbaa !5
  %.not15 = icmp slt i32 %4, %0
  br i1 %.not15, label %._crit_edge17, label %.preheader

.preheader:                                       ; preds = %3, %._crit_edge
  %.01116 = phi i32 [ %8, %._crit_edge ], [ %0, %3 ]
  %5 = load i32, ptr @m, align 4, !tbaa !5
  %.not1213 = icmp slt i32 %5, %1
  br i1 %.not1213, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %6 = sext i32 %.01116 to i64
  br label %10

._crit_edge17:                                    ; preds = %._crit_edge, %3
  ret void

._crit_edge:                                      ; preds = %10, %.preheader
  %7 = tail call noundef i32 @_Z7low_biti(i32 noundef %.01116)
  %8 = add nsw i32 %7, %.01116
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %.not = icmp sgt i32 %8, %9
  br i1 %.not, label %._crit_edge17, label %.preheader, !llvm.loop !9

10:                                               ; preds = %.lr.ph, %10
  %.014 = phi i32 [ %1, %.lr.ph ], [ %16, %10 ]
  %11 = sext i32 %.014 to i64
  %12 = getelementptr inbounds [1010 x [1010 x i64]], ptr @tr, i64 0, i64 %6, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !11
  %14 = add nsw i64 %13, %2
  store i64 %14, ptr %12, align 8, !tbaa !11
  %15 = tail call noundef i32 @_Z7low_biti(i32 noundef %.014)
  %16 = add nsw i32 %15, %.014
  %17 = load i32, ptr @m, align 4, !tbaa !5
  %.not12 = icmp sgt i32 %16, %17
  br i1 %.not12, label %._crit_edge, label %10, !llvm.loop !13
}

attributes #0 = { mustprogress 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" }

!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 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}


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