; LLVM IR from Izaron/ACM-ICPC :: Russian Council of School Olympiads (R.S.O.Sh.)/IOIP/IOIP 2015/longqueue.ll (Z5buildiii)

; 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"

@a = external dso_local global [200005 x i32], align 16
@t = external dso_local global [800020 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(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 %5, align 4, !tbaa !5
  %8 = load i32, ptr %6, align 4, !tbaa !5
  %9 = icmp eq i32 %7, %8
  br i1 %9, label %10, label %18

10:                                               ; preds = %3
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [200005 x i32], ptr @a, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %16
  store i32 %14, ptr %17, align 4, !tbaa !5
  br label %50

18:                                               ; preds = %3
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = mul nsw i32 %19, 2
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = add nsw i32 %22, %23
  %25 = sdiv i32 %24, 2
  call void @_Z5buildiii(i32 noundef %20, i32 noundef %21, i32 noundef %25)
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = mul nsw i32 %26, 2
  %28 = add nsw i32 %27, 1
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = add nsw i32 %29, %30
  %32 = sdiv i32 %31, 2
  %33 = add nsw i32 %32, 1
  %34 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %28, i32 noundef %33, i32 noundef %34)
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = mul nsw i32 %35, 2
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = mul nsw i32 %40, 2
  %42 = add nsw i32 %41, 1
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %43
  %45 = load i32, ptr %44, align 4, !tbaa !5
  %46 = add nsw i32 %39, %45
  %47 = load i32, ptr %4, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %48
  store i32 %46, ptr %49, align 4, !tbaa !5
  br label %50

50:                                               ; preds = %18, %10
  ret void
}

attributes #0 = { 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" }

!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"

@a = external dso_local local_unnamed_addr global [200005 x i32], align 16
@t = external dso_local local_unnamed_addr global [800020 x i32], align 16

; Function Attrs: mustprogress nofree nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %5, label %11

5:                                                ; preds = %3
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [200005 x i32], ptr @a, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %5, %11
  %.sink = phi i32 [ %8, %5 ], [ %23, %11 ]
  %9 = sext i32 %0 to i64
  %10 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %9
  store i32 %.sink, ptr %10, align 4, !tbaa !5
  ret void

11:                                               ; preds = %3
  %12 = shl nsw i32 %0, 1
  %13 = add nsw i32 %2, %1
  %14 = sdiv i32 %13, 2
  tail call void @_Z5buildiii(i32 noundef %12, i32 noundef %1, i32 noundef %14)
  %15 = or disjoint i32 %12, 1
  %16 = add nsw i32 %14, 1
  tail call void @_Z5buildiii(i32 noundef %15, i32 noundef %16, i32 noundef %2)
  %17 = sext i32 %12 to i64
  %18 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %17
  %19 = load i32, ptr %18, align 8, !tbaa !5
  %20 = sext i32 %15 to i64
  %21 = getelementptr inbounds [800020 x i32], ptr @t, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = add nsw i32 %22, %19
  br label %common.ret
}

attributes #0 = { mustprogress nofree nosync nounwind 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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