; LLVM IR from tangjz/acm-icpc :: 51nod/1364.ll (Z6updateiiii)

; 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"

@seg = external dso_local global [524288 x i32], align 16
@cnt = 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; 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
define dso_local void @_Z6updateiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  store i32 %3, ptr %8, align 4, !tbaa !5
  %10 = load i32, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %7, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %20

13:                                               ; preds = %4
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %15
  store i32 0, ptr %16, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %18
  store i32 0, ptr %19, align 4, !tbaa !5
  br label %78

20:                                               ; preds = %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = add nsw i32 %21, %22
  %24 = ashr i32 %23, 1
  store i32 %24, ptr %9, align 4, !tbaa !5
  %25 = load i32, ptr %8, align 4, !tbaa !5
  %26 = load i32, ptr %9, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %28, label %35

28:                                               ; preds = %20
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = add nsw i32 %29, %30
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %9, align 4, !tbaa !5
  %34 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z6updateiiii(i32 noundef %31, i32 noundef %32, i32 noundef %33, i32 noundef %34)
  br label %44

35:                                               ; preds = %20
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = add nsw i32 %36, %37
  %39 = add nsw i32 %38, 1
  %40 = load i32, ptr %9, align 4, !tbaa !5
  %41 = add nsw i32 %40, 1
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !5
  call void @_Z6updateiiii(i32 noundef %39, i32 noundef %41, i32 noundef %42, i32 noundef %43)
  br label %44

44:                                               ; preds = %35, %28
  %45 = load i32, ptr %5, align 4, !tbaa !5
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = add nsw i32 %45, %46
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %48
  %50 = load i32, ptr %5, align 4, !tbaa !5
  %51 = load i32, ptr %5, align 4, !tbaa !5
  %52 = add nsw i32 %50, %51
  %53 = add nsw i32 %52, 1
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %54
  %56 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %49, ptr noundef nonnull align 4 dereferenceable(4) %55)
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = load i32, ptr %5, align 4, !tbaa !5
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %59
  store i32 %57, ptr %60, align 4, !tbaa !5
  %61 = load i32, ptr %5, align 4, !tbaa !5
  %62 = load i32, ptr %5, align 4, !tbaa !5
  %63 = add nsw i32 %61, %62
  %64 = sext i32 %63 to i64
  %65 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %64
  %66 = load i32, ptr %65, align 4, !tbaa !5
  %67 = load i32, ptr %5, align 4, !tbaa !5
  %68 = load i32, ptr %5, align 4, !tbaa !5
  %69 = add nsw i32 %67, %68
  %70 = add nsw i32 %69, 1
  %71 = sext i32 %70 to i64
  %72 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %71
  %73 = load i32, ptr %72, align 4, !tbaa !5
  %74 = add nsw i32 %66, %73
  %75 = load i32, ptr %5, align 4, !tbaa !5
  %76 = sext i32 %75 to i64
  %77 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %76
  store i32 %74, ptr %77, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %78

78:                                               ; preds = %44, %13
  ret void
}

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


; 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"

@seg = external dso_local global [524288 x i32], align 16
@cnt = external dso_local local_unnamed_addr global [524288 x i32], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updateiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #1 {
  %5 = icmp eq i32 %1, %2
  br i1 %5, label %6, label %9

6:                                                ; preds = %4
  %7 = sext i32 %0 to i64
  %8 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %7
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %31

9:                                                ; preds = %4
  %10 = add nsw i32 %2, %1
  %11 = ashr i32 %10, 1
  %.not = icmp slt i32 %11, %3
  %12 = shl nsw i32 %0, 1
  br i1 %.not, label %14, label %13

13:                                               ; preds = %9
  tail call void @_Z6updateiiii(i32 noundef %12, i32 noundef %1, i32 noundef %11, i32 noundef %3)
  %.pre = or disjoint i32 %12, 1
  br label %17

14:                                               ; preds = %9
  %15 = or disjoint i32 %12, 1
  %16 = add nsw i32 %11, 1
  tail call void @_Z6updateiiii(i32 noundef %15, i32 noundef %16, i32 noundef %2, i32 noundef %3)
  br label %17

17:                                               ; preds = %14, %13
  %.pre-phi32 = phi i32 [ %15, %14 ], [ %.pre, %13 ]
  %18 = sext i32 %12 to i64
  %19 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %18
  %20 = sext i32 %.pre-phi32 to i64
  %21 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %20
  %22 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %19, ptr noundef nonnull align 4 dereferenceable(4) %21)
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %0 to i64
  %25 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %24
  store i32 %23, ptr %25, align 4, !tbaa !5
  %26 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %18
  %27 = load i32, ptr %26, align 8, !tbaa !5
  %28 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %20
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = add nsw i32 %29, %27
  br label %31

31:                                               ; preds = %17, %6
  %.sink34 = phi i64 [ %24, %17 ], [ %7, %6 ]
  %.sink = phi i32 [ %30, %17 ], [ 0, %6 ]
  %32 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %.sink34
  store i32 %.sink, ptr %32, align 4, !tbaa !5
  ret void
}

attributes #0 = { 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 #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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass