; LLVM IR from begeekmyfriend/leetcode :: 0026_remove_duplicates_from_sorted_array (rm_dup)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sub nsw i32 %10, 1
  store i32 %11, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = mul i64 %13, 4
  %15 = call noalias ptr @malloc(i64 noundef %14) #6
  store ptr %15, ptr %8, align 8, !tbaa !9
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %33, %2
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sub nsw i32 %18, 1
  %20 = icmp slt i32 %17, %19
  br i1 %20, label %21, label %36

21:                                               ; preds = %16
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds ptr, ptr %22, i64 %25
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = call i32 @atoi(ptr noundef %27) #7
  %29 = load ptr, ptr %8, align 8, !tbaa !9
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i32, ptr %29, i64 %31
  store i32 %28, ptr %32, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %21
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !5
  br label %16, !llvm.loop !11

36:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #5
  %37 = load ptr, ptr %8, align 8, !tbaa !9
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = call i32 @removeDuplicates(ptr noundef %37, i32 noundef %38)
  store i32 %39, ptr %9, align 4, !tbaa !5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %51, %36
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = load i32, ptr %9, align 4, !tbaa !5
  %43 = icmp slt i32 %41, %42
  br i1 %43, label %44, label %54

44:                                               ; preds = %40
  %45 = load ptr, ptr %8, align 8, !tbaa !9
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %45, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !5
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %49)
  br label %51

51:                                               ; preds = %44
  %52 = load i32, ptr %6, align 4, !tbaa !5
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %6, align 4, !tbaa !5
  br label %40, !llvm.loop !13

54:                                               ; preds = %40
  %55 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  ret i32 0
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #3

; Function Attrs: nounwind uwtable
declare hidden i32 @removeDuplicates(ptr noundef, i32 noundef) #0

declare i32 @printf(ptr noundef, ...) #4

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

attributes #0 = { 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 allocsize(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 = { inlinehint nounwind willreturn memory(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" }
attributes #4 = { "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 #5 = { nounwind }
attributes #6 = { nounwind allocsize(0) }
attributes #7 = { nounwind willreturn memory(read) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = add nsw i32 %0, -1
  %4 = sext i32 %3 to i64
  %5 = shl nsw i64 %4, 2
  %6 = tail call noalias ptr @malloc(i64 noundef %5) #4
  %7 = icmp sgt i32 %0, 1
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %3 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %8 = getelementptr inbounds ptr, ptr %1, i64 %indvars.iv.next
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %10 = tail call i32 @atoi(ptr nocapture noundef %9) #5
  %11 = getelementptr inbounds i32, ptr %6, i64 %indvars.iv
  store i32 %10, ptr %11, align 4, !tbaa !9
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %2
  %12 = tail call i32 @removeDuplicates(ptr noundef %6, i32 noundef %3)
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %.lr.ph19.preheader, label %._crit_edge20

.lr.ph19.preheader:                               ; preds = %._crit_edge
  %wide.trip.count25 = zext nneg i32 %12 to i64
  br label %.lr.ph19

.lr.ph19:                                         ; preds = %.lr.ph19.preheader, %.lr.ph19
  %indvars.iv22 = phi i64 [ 0, %.lr.ph19.preheader ], [ %indvars.iv.next23, %.lr.ph19 ]
  %14 = getelementptr inbounds i32, ptr %6, i64 %indvars.iv22
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %15)
  %indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
  %exitcond26.not = icmp eq i64 %indvars.iv.next23, %wide.trip.count25
  br i1 %exitcond26.not, label %._crit_edge20, label %.lr.ph19, !llvm.loop !13

._crit_edge20:                                    ; preds = %.lr.ph19, %._crit_edge
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  ret i32 0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden i32 @removeDuplicates(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #2 = { inlinehint mustprogress nofree nounwind willreturn memory(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" }
attributes #3 = { nofree nounwind "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 #4 = { nounwind allocsize(0) }
attributes #5 = { nounwind willreturn memory(read) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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