; LLVM IR from tangjz/acm-icpc :: codeforces/complete/756C.ll (Z8seg_downiii)

; 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 [200003 x %struct.Segment], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z8seg_downiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.Segment, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = icmp ne i32 %11, 0
  br i1 %12, label %14, label %13

13:                                               ; preds = %3
  br label %63

14:                                               ; preds = %3
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %16
  %18 = getelementptr inbounds %struct.Segment, ptr %17, i32 0, i32 1
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %21
  %23 = getelementptr inbounds %struct.Segment, ptr %22, i32 0, i32 0
  %24 = load i32, ptr %23, align 8, !tbaa !11
  %25 = add nsw i32 %24, %19
  store i32 %25, ptr %23, align 8, !tbaa !11
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %27
  %29 = getelementptr inbounds %struct.Segment, ptr %28, i32 0, i32 1
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %32
  %34 = getelementptr inbounds %struct.Segment, ptr %33, i32 0, i32 1
  %35 = load i32, ptr %34, align 4, !tbaa !9
  %36 = add nsw i32 %35, %30
  store i32 %36, ptr %34, align 4, !tbaa !9
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %38
  %40 = getelementptr inbounds %struct.Segment, ptr %39, i32 0, i32 1
  %41 = load i32, ptr %40, align 4, !tbaa !9
  %42 = load i32, ptr %6, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %43
  %45 = getelementptr inbounds %struct.Segment, ptr %44, i32 0, i32 0
  %46 = load i32, ptr %45, align 8, !tbaa !11
  %47 = add nsw i32 %46, %41
  store i32 %47, ptr %45, align 8, !tbaa !11
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %49
  %51 = getelementptr inbounds %struct.Segment, ptr %50, i32 0, i32 1
  %52 = load i32, ptr %51, align 4, !tbaa !9
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %54
  %56 = getelementptr inbounds %struct.Segment, ptr %55, i32 0, i32 1
  %57 = load i32, ptr %56, align 4, !tbaa !9
  %58 = add nsw i32 %57, %52
  store i32 %58, ptr %56, align 4, !tbaa !9
  %59 = load i32, ptr %4, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %60
  %62 = getelementptr inbounds %struct.Segment, ptr %61, i32 0, i32 1
  store i32 0, ptr %62, align 4, !tbaa !9
  br label %63

63:                                               ; preds = %14, %13
  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 [200003 x %struct.Segment], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z8seg_downiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %0 to i64
  %5 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %4, i32 1
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %21, label %7

7:                                                ; preds = %3
  %8 = sext i32 %1 to i64
  %9 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %8
  %10 = load <2 x i32>, ptr %9, align 8, !tbaa !10
  %11 = insertelement <2 x i32> poison, i32 %6, i64 0
  %12 = shufflevector <2 x i32> %11, <2 x i32> poison, <2 x i32> zeroinitializer
  %13 = add nsw <2 x i32> %10, %12
  store <2 x i32> %13, ptr %9, align 8, !tbaa !10
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %2 to i64
  %16 = getelementptr inbounds [200003 x %struct.Segment], ptr @seg, i64 0, i64 %15
  %17 = load <2 x i32>, ptr %16, align 8, !tbaa !10
  %18 = insertelement <2 x i32> poison, i32 %14, i64 0
  %19 = shufflevector <2 x i32> %18, <2 x i32> poison, <2 x i32> zeroinitializer
  %20 = add nsw <2 x i32> %17, %19
  store <2 x i32> %20, ptr %16, align 8, !tbaa !10
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %3, %7
  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,InstCombinePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass