; LLVM IR from tangjz/acm-icpc :: buaa/oj3rd/1191.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"

@seg = external dso_local global [262144 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
  %7 = 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
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %15

11:                                               ; preds = %3
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %13
  store i32 1, ptr %14, align 4, !tbaa !5
  br label %49

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = add nsw i32 %16, %17
  %19 = ashr i32 %18, 1
  store i32 %19, ptr %7, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = add nsw i32 %20, %21
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %22, i32 noundef %23, i32 noundef %24)
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = add nsw i32 %25, %26
  %28 = add nsw i32 %27, 1
  %29 = load i32, ptr %7, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  %31 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %28, i32 noundef %30, i32 noundef %31)
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = add nsw i32 %32, %33
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = add nsw i32 %38, %39
  %41 = add nsw i32 %40, 1
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = add nsw i32 %37, %44
  %46 = load i32, ptr %4, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %47
  store i32 %45, ptr %48, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %49

49:                                               ; preds = %15, %11
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 local_unnamed_addr global [262144 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 %common.ret, label %7

common.ret:                                       ; preds = %3, %7
  %.sink = phi i32 [ %19, %7 ], [ 1, %3 ]
  %5 = sext i32 %0 to i64
  %6 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %5
  store i32 %.sink, ptr %6, align 4, !tbaa !5
  ret void

7:                                                ; preds = %3
  %8 = add nsw i32 %2, %1
  %9 = ashr i32 %8, 1
  %10 = shl nsw i32 %0, 1
  tail call void @_Z5buildiii(i32 noundef %10, i32 noundef %1, i32 noundef %9)
  %11 = or disjoint i32 %10, 1
  %12 = add nsw i32 %9, 1
  tail call void @_Z5buildiii(i32 noundef %11, i32 noundef %12, i32 noundef %2)
  %13 = sext i32 %10 to i64
  %14 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %13
  %15 = load i32, ptr %14, align 8, !tbaa !5
  %16 = sext i32 %11 to i64
  %17 = getelementptr inbounds [262144 x i32], ptr @seg, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = add nsw i32 %18, %15
  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,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass