; LLVM IR from tangjz/acm-icpc :: lydsy/3083.ll (Z9push_downi)

; 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"

%struct.Segment = type { i32, i32 }

@seg = external dso_local global [262144 x %struct.Segment], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9push_downi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %4
  %6 = getelementptr inbounds %struct.Segment, ptr %5, i32 0, i32 1
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  br label %46

10:                                               ; preds = %1
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %12
  %14 = getelementptr inbounds %struct.Segment, ptr %13, i32 0, i32 1
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = add nsw i32 %16, %17
  %19 = add nsw i32 %18, 1
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %20
  %22 = getelementptr inbounds %struct.Segment, ptr %21, i32 0, i32 1
  store i32 %15, ptr %22, align 4, !tbaa !9
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = add nsw i32 %23, %24
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %26
  %28 = getelementptr inbounds %struct.Segment, ptr %27, i32 0, i32 1
  store i32 %15, ptr %28, align 4, !tbaa !9
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = load i32, ptr %2, align 4, !tbaa !5
  %31 = add nsw i32 %29, %30
  %32 = add nsw i32 %31, 1
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %33
  %35 = getelementptr inbounds %struct.Segment, ptr %34, i32 0, i32 0
  store i32 %15, ptr %35, align 8, !tbaa !11
  %36 = load i32, ptr %2, align 4, !tbaa !5
  %37 = load i32, ptr %2, align 4, !tbaa !5
  %38 = add nsw i32 %36, %37
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %39
  %41 = getelementptr inbounds %struct.Segment, ptr %40, i32 0, i32 0
  store i32 %15, ptr %41, align 8, !tbaa !11
  %42 = load i32, ptr %2, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %43
  %45 = getelementptr inbounds %struct.Segment, ptr %44, i32 0, i32 1
  store i32 0, ptr %45, align 4, !tbaa !9
  br label %46

46:                                               ; preds = %10, %9
  ret void
}

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 = !{!10, !6, i64 4}
!10 = !{!"_ZTS7Segment", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 0}


; 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"

%struct.Segment = type { i32, i32 }

@seg = external dso_local local_unnamed_addr global [262144 x %struct.Segment], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z9push_downi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %2, i32 1
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %11, label %5

5:                                                ; preds = %1
  %6 = shl nsw i32 %0, 1
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [262144 x %struct.Segment], ptr @seg, i64 0, i64 %7
  %9 = insertelement <4 x i32> poison, i32 %4, i64 0
  %10 = shufflevector <4 x i32> %9, <4 x i32> poison, <4 x i32> zeroinitializer
  store <4 x i32> %10, ptr %8, align 16, !tbaa !10
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %1, %5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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, !7, i64 4}
!6 = !{!"_ZTS7Segment", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InstCombinePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass