; LLVM IR from tangjz/acm-icpc :: hdu/6748.ll (Z6getCntx)

; 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"

@sz = external dso_local global [5 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z6getCntii(i32 noundef, i32 noundef) #0

; 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

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z6getCntx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 1, ptr %4, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %44, %1
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = icmp slt i32 %10, 5
  br i1 %11, label %13, label %12

12:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %47

13:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = sub nsw i32 5, %14
  store i32 %15, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %16 = load i64, ptr %2, align 8, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = sdiv i64 %16, %18
  store i64 %19, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 2000000000, ptr %8, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull align 8 dereferenceable(8) %8)
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = trunc i64 %21 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  store i32 %22, ptr %6, align 4, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [5 x i32], ptr @sz, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = call noundef i64 @_Z6getCntii(i32 noundef %23, i32 noundef %27)
  %29 = load i64, ptr %3, align 8, !tbaa !5
  %30 = add nsw i64 %29, %28
  store i64 %30, ptr %3, align 8, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !9
  %32 = icmp sgt i32 %31, 1
  br i1 %32, label %33, label %43

33:                                               ; preds = %13
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = load i32, ptr %4, align 4, !tbaa !9
  %36 = sub nsw i32 %35, 1
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds [5 x i32], ptr @sz, i64 0, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !9
  %40 = call noundef i64 @_Z6getCntii(i32 noundef %34, i32 noundef %39)
  %41 = load i64, ptr %3, align 8, !tbaa !5
  %42 = sub nsw i64 %41, %40
  store i64 %42, ptr %3, align 8, !tbaa !5
  br label %43

43:                                               ; preds = %33, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %44

44:                                               ; preds = %43
  %45 = load i32, ptr %4, align 4, !tbaa !9
  %46 = add nsw i32 %45, 1
  store i32 %46, ptr %4, align 4, !tbaa !9
  br label %9, !llvm.loop !11

47:                                               ; preds = %12
  %48 = load i64, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret i64 %48
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

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 = { 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

@sz = external dso_local local_unnamed_addr global [5 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z6getCntii(i32 noundef, i32 noundef) local_unnamed_addr #0

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

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z6getCntx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %4 = sdiv i64 %0, 4
  store i64 %4, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 2000000000, ptr %3, align 8, !tbaa !5
  %5 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = trunc i64 %6 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %8 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 4), align 4, !tbaa !9
  %9 = call noundef i64 @_Z6getCntii(i32 noundef %7, i32 noundef %8)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %10 = sdiv i64 %0, 3
  store i64 %10, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 2000000000, ptr %3, align 8, !tbaa !5
  %11 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %12 = load i64, ptr %11, align 8, !tbaa !5
  %13 = trunc i64 %12 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %14 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 8), align 8, !tbaa !9
  %15 = call noundef i64 @_Z6getCntii(i32 noundef %13, i32 noundef %14)
  %16 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 4), align 4, !tbaa !9
  %17 = call noundef i64 @_Z6getCntii(i32 noundef %13, i32 noundef %16)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %18 = sdiv i64 %0, 2
  store i64 %18, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 2000000000, ptr %3, align 8, !tbaa !5
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %20 = load i64, ptr %19, align 8, !tbaa !5
  %21 = trunc i64 %20 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %22 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 12), align 4, !tbaa !9
  %23 = call noundef i64 @_Z6getCntii(i32 noundef %21, i32 noundef %22)
  %24 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 8), align 8, !tbaa !9
  %25 = call noundef i64 @_Z6getCntii(i32 noundef %21, i32 noundef %24)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  store i64 2000000000, ptr %3, align 8, !tbaa !5
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %3)
  %27 = load i64, ptr %26, align 8, !tbaa !5
  %28 = trunc i64 %27 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %29 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 16), align 16, !tbaa !9
  %30 = call noundef i64 @_Z6getCntii(i32 noundef %28, i32 noundef %29)
  %31 = load i32, ptr getelementptr inbounds (i8, ptr @sz, i64 12), align 4, !tbaa !9
  %32 = call noundef i64 @_Z6getCntii(i32 noundef %28, i32 noundef %31)
  %33 = add i64 %17, %25
  %34 = add nsw i64 %15, %9
  %35 = add i64 %34, %23
  %36 = add i64 %35, %30
  %37 = add i64 %33, %32
  %38 = sub i64 %36, %37
  ret i64 %38
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass