; LLVM IR from manishbisht/Competitive-Programming :: Algorithms/Sorting/Bubble Sort.ll (Z5bSortPii)

; 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: mustprogress nounwind uwtable
define dso_local void @_Z5bSortPii(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
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %8

8:                                                ; preds = %57, %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 %12, label %60

12:                                               ; preds = %8
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %53, %12
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %56

17:                                               ; preds = %13
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = sub nsw i32 %24, 1
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i32, ptr %23, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !9
  %29 = icmp slt i32 %22, %28
  br i1 %29, label %30, label %52

30:                                               ; preds = %17
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = sub nsw i32 %32, 1
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %31, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !9
  store i32 %36, ptr %7, align 4, !tbaa !9
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = load i32, ptr %6, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %37, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !9
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = load i32, ptr %6, align 4, !tbaa !9
  %44 = sub nsw i32 %43, 1
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %42, i64 %45
  store i32 %41, ptr %46, align 4, !tbaa !9
  %47 = load i32, ptr %7, align 4, !tbaa !9
  %48 = load ptr, ptr %3, align 8, !tbaa !5
  %49 = load i32, ptr %6, align 4, !tbaa !9
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %48, i64 %50
  store i32 %47, ptr %51, align 4, !tbaa !9
  br label %52

52:                                               ; preds = %30, %17
  br label %53

53:                                               ; preds = %52
  %54 = load i32, ptr %6, align 4, !tbaa !9
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %6, align 4, !tbaa !9
  br label %13, !llvm.loop !11

56:                                               ; preds = %13
  br label %57

57:                                               ; preds = %56
  %58 = load i32, ptr %5, align 4, !tbaa !9
  %59 = add nsw i32 %58, 1
  store i32 %59, ptr %5, align 4, !tbaa !9
  br label %8, !llvm.loop !13

60:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ 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: mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z5bSortPii(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %or.cond = icmp slt i32 %1, 2
  br i1 %or.cond, label %._crit_edge24, label %.preheader.us.preheader

.preheader.us.preheader:                          ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  %3 = add nsw i64 %wide.trip.count, -1
  %xtraiter = and i64 %3, 1
  %4 = icmp eq i32 %1, 2
  %unroll_iter = and i64 %3, -2
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %.023.us = phi i32 [ %25, %._crit_edge.us ], [ 0, %.preheader.us.preheader ]
  br i1 %4, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new

.preheader.us.new:                                ; preds = %.preheader.us, %18
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %18 ], [ 1, %.preheader.us ]
  %niter = phi i64 [ %niter.next.1, %18 ], [ 0, %.preheader.us ]
  %5 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = getelementptr i8, ptr %5, i64 -4
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp slt i32 %6, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %.preheader.us.new
  store i32 %6, ptr %7, align 4, !tbaa !5
  store i32 %8, ptr %5, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %10, %.preheader.us.new
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %13 = getelementptr inbounds i8, ptr %12, i64 4
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = load i32, ptr %12, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %18

17:                                               ; preds = %11
  store i32 %14, ptr %12, align 4, !tbaa !5
  store i32 %15, ptr %13, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %17, %11
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new, !llvm.loop !9

._crit_edge.us.unr-lcssa:                         ; preds = %18, %.preheader.us
  %indvars.iv.unr = phi i64 [ 1, %.preheader.us ], [ %indvars.iv.next.1, %18 ]
  br i1 %lcmp.mod.not, label %._crit_edge.us, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.us.unr-lcssa
  %19 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.unr
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = getelementptr i8, ptr %19, i64 -4
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp slt i32 %20, %22
  br i1 %23, label %24, label %._crit_edge.us

24:                                               ; preds = %.epil.preheader
  store i32 %20, ptr %21, align 4, !tbaa !5
  store i32 %22, ptr %19, align 4, !tbaa !5
  br label %._crit_edge.us

._crit_edge.us:                                   ; preds = %.epil.preheader, %24, %._crit_edge.us.unr-lcssa
  %25 = add nuw nsw i32 %.023.us, 1
  %exitcond27.not = icmp eq i32 %25, %1
  br i1 %exitcond27.not, label %._crit_edge24, label %.preheader.us, !llvm.loop !11

._crit_edge24:                                    ; preds = %._crit_edge.us, %2
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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