; LLVM IR from div-bargali/Data-Structures-and-Algorithms :: C/Algorithms/Sorting-Algorithms/Merge Sort (MergeSort)

; 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"

@a = external dso_local global [11 x i32], align 16
@.str = external hidden unnamed_addr constant [17 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [16 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local void @sort(i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %3 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %13, %0
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp sle i32 %5, 10
  br i1 %6, label %7, label %16

7:                                                ; preds = %4
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [11 x i32], ptr @a, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %11)
  br label %13

13:                                               ; preds = %7
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %2, align 4, !tbaa !5
  br label %4, !llvm.loop !9

16:                                               ; preds = %4
  call void @sort(i32 noundef 0, i32 noundef 10)
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %27, %16
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = icmp sle i32 %19, 10
  br i1 %20, label %21, label %30

21:                                               ; preds = %18
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [11 x i32], ptr @a, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %25)
  br label %27

27:                                               ; preds = %21
  %28 = load i32, ptr %2, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %2, align 4, !tbaa !5
  br label %18, !llvm.loop !11

30:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %31 = load i32, ptr %1, align 4
  ret i32 %31
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

@a = external dso_local local_unnamed_addr global [11 x i32], align 16
@.str = external hidden unnamed_addr constant [17 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [16 x i8], align 1

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %2 = load i32, ptr @a, align 16, !tbaa !5
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %2)
  %4 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 4), align 4, !tbaa !5
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %4)
  %6 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 8), align 8, !tbaa !5
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %6)
  %8 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 12), align 4, !tbaa !5
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %8)
  %10 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 16), align 16, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %10)
  %12 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 20), align 4, !tbaa !5
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %12)
  %14 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 24), align 8, !tbaa !5
  %15 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %14)
  %16 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 28), align 4, !tbaa !5
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %16)
  %18 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 32), align 16, !tbaa !5
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %18)
  %20 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 36), align 4, !tbaa !5
  %21 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %20)
  %22 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 40), align 8, !tbaa !5
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %22)
  tail call void @sort(i32 noundef 0, i32 noundef 10)
  %24 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %25 = load i32, ptr @a, align 16, !tbaa !5
  %26 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %25)
  %27 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 4), align 4, !tbaa !5
  %28 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %27)
  %29 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 8), align 8, !tbaa !5
  %30 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %29)
  %31 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 12), align 4, !tbaa !5
  %32 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %31)
  %33 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 16), align 16, !tbaa !5
  %34 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %33)
  %35 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 20), align 4, !tbaa !5
  %36 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %35)
  %37 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 24), align 8, !tbaa !5
  %38 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %37)
  %39 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 28), align 4, !tbaa !5
  %40 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %39)
  %41 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 32), align 16, !tbaa !5
  %42 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %41)
  %43 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 36), align 4, !tbaa !5
  %44 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %43)
  %45 = load i32, ptr getelementptr inbounds (i8, ptr @a, i64 40), align 8, !tbaa !5
  %46 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %45)
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #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 = { 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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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