; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/199 Division 2/Problem E/E.ll (Z6updatei)

; 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"

@par = external dso_local global [131072 x i32], align 16
@level = external dso_local global [131072 x i32], align 16
@ans = external dso_local global [131072 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 nounwind uwtable
declare dso_local noundef i32 @_Z3lcaii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6updatei(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %5 = load i32, ptr %2, align 4, !tbaa !5
  store i32 %5, ptr %3, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %40, %1
  br label %7

7:                                                ; preds = %6
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [131072 x i32], ptr @ans, i64 0, i64 %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %14, %18
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = call noundef i32 @_Z3lcaii(i32 noundef %20, i32 noundef %21)
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = mul nsw i32 2, %25
  %27 = sub nsw i32 %19, %26
  store i32 %27, ptr %4, align 4, !tbaa !5
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %10, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [131072 x i32], ptr @ans, i64 0, i64 %31
  store i32 %29, ptr %32, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %33 = load i32, ptr %3, align 4, !tbaa !5
  %34 = load i32, ptr %3, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [131072 x i32], ptr @par, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = icmp eq i32 %33, %37
  br i1 %38, label %39, label %40

39:                                               ; preds = %7
  br label %45

40:                                               ; preds = %7
  %41 = load i32, ptr %3, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [131072 x i32], ptr @par, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  store i32 %44, ptr %3, align 4, !tbaa !5
  br label %6, !llvm.loop !9

45:                                               ; preds = %39
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { inlinehint 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 #4 = { 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"

@par = external dso_local local_unnamed_addr global [131072 x i32], align 16
@level = external dso_local local_unnamed_addr global [131072 x i32], align 16
@ans = external dso_local global [131072 x i32], align 16

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

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3lcaii(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updatei(i32 noundef %0) local_unnamed_addr #1 {
  %2 = alloca i32, align 4
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %3
  br label %5

5:                                                ; preds = %5, %1
  %.0 = phi i32 [ %0, %1 ], [ %21, %5 ]
  %6 = sext i32 %.0 to i64
  %7 = getelementptr inbounds [131072 x i32], ptr @ans, i64 0, i64 %6
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  %8 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %6
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = add nsw i32 %10, %9
  %12 = call noundef i32 @_Z3lcaii(i32 noundef %.0, i32 noundef %0)
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [131072 x i32], ptr @level, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = shl i32 %15, 1
  %17 = sub i32 %11, %16
  store i32 %17, ptr %2, align 4, !tbaa !5
  %18 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %7, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %19 = load i32, ptr %18, align 4, !tbaa !5
  store i32 %19, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  %20 = getelementptr inbounds [131072 x i32], ptr @par, i64 0, i64 %6
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = icmp eq i32 %.0, %21
  br i1 %22, label %23, label %5, !llvm.loop !9

23:                                               ; preds = %5
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

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


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass