; LLVM IR from gargarchit/Data_Structure_n_Algorithms :: Array_Problems (2_First_Duplicate)

; 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 [35 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

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

9:                                                ; preds = %45, %2
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = sub nsw i32 %11, 1
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %14, label %48

14:                                               ; preds = %9
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr %6, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %41, %14
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = load i32, ptr %4, align 4, !tbaa !9
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %44

21:                                               ; preds = %17
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i32, ptr %27, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = icmp eq i32 %26, %31
  br i1 %32, label %33, label %40

33:                                               ; preds = %21
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %38)
  store i32 1, ptr %7, align 4
  br label %49

40:                                               ; preds = %21
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %6, align 4, !tbaa !9
  br label %17, !llvm.loop !11

44:                                               ; preds = %17
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %5, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !13

48:                                               ; preds = %9
  store i32 0, ptr %7, align 4
  br label %49

49:                                               ; preds = %48, %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  %50 = load i32, ptr %7, align 4
  switch i32 %50, label %52 [
    i32 0, label %51
    i32 1, label %51
  ]

51:                                               ; preds = %49, %49
  ret void

52:                                               ; preds = %49
  unreachable
}

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

declare i32 @printf(ptr noundef, ...) #2

; 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 = { "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 = !{!"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}


; 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 [35 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @First_Duplicate(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %4 = icmp sgt i32 %1, 1
  br i1 %4, label %.lr.ph17.preheader, label %.loopexit14

.lr.ph17.preheader:                               ; preds = %2
  %5 = add nsw i32 %1, -1
  %wide.trip.count24 = zext nneg i32 %5 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

.loopexit:                                        ; preds = %8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond25.not = icmp eq i64 %indvars.iv.next22, %wide.trip.count24
  br i1 %exitcond25.not, label %.loopexit14, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.loopexit, %.lr.ph17.preheader
  %indvars.iv21 = phi i64 [ 0, %.lr.ph17.preheader ], [ %indvars.iv.next22, %.loopexit ]
  %indvars.iv = phi i64 [ 1, %.lr.ph17.preheader ], [ %indvars.iv.next, %.loopexit ]
  %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
  %6 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv21
  %7 = load i32, ptr %6, align 4, !tbaa !7
  br label %9

8:                                                ; preds = %9
  %indvars.iv.next19 = add nuw nsw i64 %indvars.iv18, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next19, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %9, !llvm.loop !11

9:                                                ; preds = %.lr.ph, %8
  %indvars.iv18 = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next19, %8 ]
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv18
  %11 = load i32, ptr %10, align 4, !tbaa !7
  %12 = icmp eq i32 %7, %11
  br i1 %12, label %13, label %8

13:                                               ; preds = %9
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %7)
  br label %.loopexit14

.loopexit14:                                      ; preds = %.loopexit, %2, %13
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass