; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Algorithms/Sorting/Bubble Sort (bubbleSort)

; 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: 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 @swap(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @bubbleSort(ptr noundef %0, i32 noundef %1) #1 {
  %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) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %47, %2
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i32 2, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %50

13:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr %7, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %43, %13
  %17 = load i32, ptr %7, align 4, !tbaa !9
  %18 = load i32, ptr %4, align 4, !tbaa !9
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  store i32 5, ptr %6, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %46

21:                                               ; preds = %16
  %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 %7, 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 sgt i32 %26, %31
  br i1 %32, label %33, label %42

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 ptr, ptr %3, align 8, !tbaa !5
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  call void @swap(ptr noundef %37, ptr noundef %41)
  br label %42

42:                                               ; preds = %33, %21
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %7, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %7, align 4, !tbaa !9
  br label %16, !llvm.loop !11

46:                                               ; preds = %20
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %5, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %5, align 4, !tbaa !9
  br label %8, !llvm.loop !13

50:                                               ; preds = %12
  ret void
}

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 = { 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"

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

; Function Attrs: nounwind uwtable
define dso_local void @bubbleSort(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph18.preheader, label %._crit_edge

.lr.ph18.preheader:                               ; preds = %2
  %4 = zext nneg i32 %1 to i64
  %wide.trip.count25 = zext nneg i32 %1 to i64
  br label %.lr.ph18

.loopexit:                                        ; preds = %13, %.lr.ph18
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond26.not = icmp eq i64 %indvars.iv.next23, %wide.trip.count25
  br i1 %exitcond26.not, label %._crit_edge, label %.lr.ph18, !llvm.loop !5

._crit_edge:                                      ; preds = %.loopexit, %2
  ret void

.lr.ph18:                                         ; preds = %.lr.ph18.preheader, %.loopexit
  %indvars.iv22 = phi i64 [ 0, %.lr.ph18.preheader ], [ %indvars.iv.next23, %.loopexit ]
  %indvars.iv = phi i64 [ 1, %.lr.ph18.preheader ], [ %indvars.iv.next, %.loopexit ]
  %indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
  %5 = icmp ult i64 %indvars.iv.next23, %4
  br i1 %5, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.lr.ph18
  %6 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv22
  br label %7

7:                                                ; preds = %.lr.ph, %13
  %indvars.iv19 = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next20, %13 ]
  %8 = load i32, ptr %6, align 4, !tbaa !7
  %9 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv19
  %10 = load i32, ptr %9, align 4, !tbaa !7
  %11 = icmp sgt i32 %8, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %7
  tail call void @swap(ptr noundef nonnull %6, ptr noundef nonnull %9)
  br label %13

13:                                               ; preds = %7, %12
  %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next20, %wide.trip.count25
  br i1 %exitcond.not, label %.loopexit, label %7, !llvm.loop !11
}

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" }

!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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass