; LLVM IR from TLE-MEC/Hack-CP-DSA :: Codechef/Remove One Element/solution.ll (Z6binaryPxxx)

; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6binaryPxxx(ptr noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i64, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = sub nsw i64 %12, 1
  store i64 %13, ptr %9, align 8, !tbaa !9
  br label %14

14:                                               ; preds = %48, %3
  %15 = load i64, ptr %8, align 8, !tbaa !9
  %16 = load i64, ptr %9, align 8, !tbaa !9
  %17 = icmp sle i64 %15, %16
  br i1 %17, label %18, label %49

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %19 = load i64, ptr %8, align 8, !tbaa !9
  %20 = load i64, ptr %9, align 8, !tbaa !9
  %21 = add nsw i64 %19, %20
  %22 = sdiv i64 %21, 2
  store i64 %22, ptr %10, align 8, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %10, align 8, !tbaa !9
  %25 = getelementptr inbounds i64, ptr %23, i64 %24
  %26 = load i64, ptr %25, align 8, !tbaa !9
  %27 = load i64, ptr %7, align 8, !tbaa !9
  %28 = icmp eq i64 %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %18
  %30 = load i64, ptr %10, align 8, !tbaa !9
  store i64 %30, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %46

31:                                               ; preds = %18
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = load i64, ptr %10, align 8, !tbaa !9
  %34 = getelementptr inbounds i64, ptr %32, i64 %33
  %35 = load i64, ptr %34, align 8, !tbaa !9
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = icmp sgt i64 %35, %36
  br i1 %37, label %38, label %41

38:                                               ; preds = %31
  %39 = load i64, ptr %10, align 8, !tbaa !9
  %40 = sub nsw i64 %39, 1
  store i64 %40, ptr %9, align 8, !tbaa !9
  br label %44

41:                                               ; preds = %31
  %42 = load i64, ptr %10, align 8, !tbaa !9
  %43 = add nsw i64 %42, 1
  store i64 %43, ptr %8, align 8, !tbaa !9
  br label %44

44:                                               ; preds = %41, %38
  br label %45

45:                                               ; preds = %44
  store i32 0, ptr %11, align 4
  br label %46

46:                                               ; preds = %45, %29
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  %47 = load i32, ptr %11, align 4
  switch i32 %47, label %50 [
    i32 0, label %48
  ]

48:                                               ; preds = %46
  br label %14, !llvm.loop !11

49:                                               ; preds = %14
  store i64 -1, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %50

50:                                               ; preds = %49, %46
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %51 = load i64, ptr %4, align 8
  ret i64 %51
}

; 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 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i64 @_Z6binaryPxxx(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not28 = icmp slt i64 %1, 1
  br i1 %.not28, label %.thread, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = add nsw i64 %1, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %9
  %.01630 = phi i64 [ %.117, %9 ], [ %4, %.lr.ph.preheader ]
  %.01929 = phi i64 [ %.120, %9 ], [ 0, %.lr.ph.preheader ]
  %5 = add nuw nsw i64 %.01630, %.01929
  %6 = lshr i64 %5, 1
  %7 = getelementptr inbounds i64, ptr %0, i64 %6
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %.not24 = icmp eq i64 %8, %2
  br i1 %.not24, label %.thread, label %9

9:                                                ; preds = %.lr.ph
  %10 = icmp sgt i64 %8, %2
  %11 = add nsw i64 %6, -1
  %12 = add nuw nsw i64 %6, 1
  %.120 = select i1 %10, i64 %.01929, i64 %12
  %.117 = select i1 %10, i64 %11, i64 %.01630
  %.not = icmp sgt i64 %.120, %.117
  br i1 %.not, label %.thread, label %.lr.ph

.thread:                                          ; preds = %9, %.lr.ph, %3
  %.2 = phi i64 [ -1, %3 ], [ %6, %.lr.ph ], [ -1, %9 ]
  ret i64 %.2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass