; LLVM IR from freddiev4/dailyprogrammerchallenges :: Easy Challenges/Challenge 0014 Easy/solutions (solution)

; 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.5 = external hidden unnamed_addr constant [30 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @print_list(ptr noundef) #0

; 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

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

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

; 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 ptr, align 8
  %7 = 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 8, ptr %6) #4
  store ptr null, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %16, %2
  %9 = load i32, ptr %7, align 4, !tbaa !5
  %10 = icmp slt i32 %9, 15
  br i1 %10, label %11, label %19

11:                                               ; preds = %8
  %12 = load ptr, ptr %6, align 8, !tbaa !9
  %13 = call i32 @rand() #4
  %14 = srem i32 %13, 1234
  %15 = call ptr @push_at_end(ptr noundef %12, i32 noundef %14)
  store ptr %15, ptr %6, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %11
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %7, align 4, !tbaa !5
  br label %8, !llvm.loop !11

19:                                               ; preds = %8
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  call void @print_list(ptr noundef %21)
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  %23 = call ptr @reverse_in_group(ptr noundef %22, i32 noundef 4)
  store ptr %23, ptr %6, align 8, !tbaa !9
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  call void @print_list(ptr noundef %25)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  ret i32 0
}

; Function Attrs: nounwind
declare i32 @rand() #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 = { 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 "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 }

!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"}


; 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.5 = external hidden unnamed_addr constant [30 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @print_list(ptr noundef) local_unnamed_addr #0

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

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

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = tail call i32 @rand() #3
  %4 = srem i32 %3, 1234
  %5 = tail call ptr @push_at_end(ptr noundef null, i32 noundef %4)
  %6 = tail call i32 @rand() #3
  %7 = srem i32 %6, 1234
  %8 = tail call ptr @push_at_end(ptr noundef %5, i32 noundef %7)
  %9 = tail call i32 @rand() #3
  %10 = srem i32 %9, 1234
  %11 = tail call ptr @push_at_end(ptr noundef %8, i32 noundef %10)
  %12 = tail call i32 @rand() #3
  %13 = srem i32 %12, 1234
  %14 = tail call ptr @push_at_end(ptr noundef %11, i32 noundef %13)
  %15 = tail call i32 @rand() #3
  %16 = srem i32 %15, 1234
  %17 = tail call ptr @push_at_end(ptr noundef %14, i32 noundef %16)
  %18 = tail call i32 @rand() #3
  %19 = srem i32 %18, 1234
  %20 = tail call ptr @push_at_end(ptr noundef %17, i32 noundef %19)
  %21 = tail call i32 @rand() #3
  %22 = srem i32 %21, 1234
  %23 = tail call ptr @push_at_end(ptr noundef %20, i32 noundef %22)
  %24 = tail call i32 @rand() #3
  %25 = srem i32 %24, 1234
  %26 = tail call ptr @push_at_end(ptr noundef %23, i32 noundef %25)
  %27 = tail call i32 @rand() #3
  %28 = srem i32 %27, 1234
  %29 = tail call ptr @push_at_end(ptr noundef %26, i32 noundef %28)
  %30 = tail call i32 @rand() #3
  %31 = srem i32 %30, 1234
  %32 = tail call ptr @push_at_end(ptr noundef %29, i32 noundef %31)
  %33 = tail call i32 @rand() #3
  %34 = srem i32 %33, 1234
  %35 = tail call ptr @push_at_end(ptr noundef %32, i32 noundef %34)
  %36 = tail call i32 @rand() #3
  %37 = srem i32 %36, 1234
  %38 = tail call ptr @push_at_end(ptr noundef %35, i32 noundef %37)
  %39 = tail call i32 @rand() #3
  %40 = srem i32 %39, 1234
  %41 = tail call ptr @push_at_end(ptr noundef %38, i32 noundef %40)
  %42 = tail call i32 @rand() #3
  %43 = srem i32 %42, 1234
  %44 = tail call ptr @push_at_end(ptr noundef %41, i32 noundef %43)
  %45 = tail call i32 @rand() #3
  %46 = srem i32 %45, 1234
  %47 = tail call ptr @push_at_end(ptr noundef %44, i32 noundef %46)
  %48 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  tail call void @print_list(ptr noundef %47)
  %49 = tail call ptr @reverse_in_group(ptr noundef %47, i32 noundef 4)
  %50 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  tail call void @print_list(ptr noundef %49)
  ret i32 0
}

; Function Attrs: nounwind
declare i32 @rand() local_unnamed_addr #2

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 = { 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 #2 = { 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 #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)"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass