; LLVM IR from JessonYue/LeetCodeLearning :: Array/linchuanxin/homework/homework_0804_0809/排序 (bubble_sort)

; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [127 x i8], align 1
@__PRETTY_FUNCTION__.quick_sort = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @quick_sort(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
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  br label %12

11:                                               ; preds = %2
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 9, ptr noundef @__PRETTY_FUNCTION__.quick_sort) #4
  unreachable

12:                                               ; preds = %10
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %66, %12
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = sub nsw i32 %15, 1
  %17 = icmp slt i32 %14, %16
  br i1 %17, label %18, label %69

18:                                               ; preds = %13
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %62, %18
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = sub nsw i32 %21, %22
  %24 = sub nsw i32 %23, 1
  %25 = icmp slt i32 %20, %24
  br i1 %25, label %26, label %65

26:                                               ; preds = %19
  %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 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i32, ptr %32, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = icmp sgt i32 %31, %37
  br i1 %38, label %39, label %61

39:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !9
  store i32 %44, ptr %7, align 4, !tbaa !9
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = add nsw i32 %46, 1
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr %45, i64 %48
  %50 = load i32, ptr %49, align 4, !tbaa !9
  %51 = load ptr, ptr %3, align 8, !tbaa !5
  %52 = load i32, ptr %6, align 4, !tbaa !9
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %51, i64 %53
  store i32 %50, ptr %54, align 4, !tbaa !9
  %55 = load i32, ptr %7, align 4, !tbaa !9
  %56 = load ptr, ptr %3, align 8, !tbaa !5
  %57 = load i32, ptr %6, align 4, !tbaa !9
  %58 = add nsw i32 %57, 1
  %59 = sext i32 %58 to i64
  %60 = getelementptr inbounds i32, ptr %56, i64 %59
  store i32 %55, ptr %60, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %61

61:                                               ; preds = %39, %26
  br label %62

62:                                               ; preds = %61
  %63 = load i32, ptr %6, align 4, !tbaa !9
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %6, align 4, !tbaa !9
  br label %19, !llvm.loop !11

65:                                               ; preds = %19
  br label %66

66:                                               ; preds = %65
  %67 = load i32, ptr %5, align 4, !tbaa !9
  %68 = add nsw i32 %67, 1
  store i32 %68, ptr %5, align 4, !tbaa !9
  br label %13, !llvm.loop !13

69:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret void
}

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

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, 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 = { noreturn 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 }
attributes #4 = { noreturn 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [127 x i8], align 1
@__PRETTY_FUNCTION__.quick_sort = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @quick_sort(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %5, label %.preheader24

.preheader24:                                     ; preds = %2
  %3 = add i32 %1, -1
  %4 = icmp sgt i32 %1, 1
  br i1 %4, label %.preheader.preheader, label %._crit_edge27

.preheader.preheader:                             ; preds = %.preheader24
  %invariant.gep = getelementptr i8, ptr %0, i64 4
  br label %.preheader

5:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 9, ptr noundef nonnull @__PRETTY_FUNCTION__.quick_sort) #2
  unreachable

.preheader:                                       ; preds = %.preheader.preheader, %._crit_edge
  %indvars.iv29 = phi i32 [ %indvars.iv.next30, %._crit_edge ], [ %3, %.preheader.preheader ]
  %.026 = phi i32 [ %28, %._crit_edge ], [ 0, %.preheader.preheader ]
  %6 = zext i32 %indvars.iv29 to i64
  %7 = sub nsw i32 %.026, %1
  %8 = icmp slt i32 %7, -1
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader
  %.pre = load i32, ptr %0, align 4, !tbaa !5
  %xtraiter = and i64 %6, 1
  %9 = icmp eq i32 %indvars.iv29, 1
  br i1 %9, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %6, 4294967294
  br label %.lr.ph

.lr.ph:                                           ; preds = %22, %.lr.ph.preheader.new
  %10 = phi i32 [ %.pre, %.lr.ph.preheader.new ], [ %23, %22 ]
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.1, %22 ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %22 ]
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %11 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp sgt i32 %10, %12
  br i1 %13, label %14, label %.lr.ph.1

14:                                               ; preds = %.lr.ph
  %15 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  store i32 %12, ptr %15, align 4, !tbaa !5
  store i32 %10, ptr %11, align 4, !tbaa !5
  br label %.lr.ph.1

.lr.ph.1:                                         ; preds = %.lr.ph, %14
  %16 = phi i32 [ %12, %.lr.ph ], [ %10, %14 ]
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %17 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next.1
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = icmp sgt i32 %16, %18
  br i1 %19, label %20, label %22

20:                                               ; preds = %.lr.ph.1
  %21 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  store i32 %18, ptr %21, align 4, !tbaa !5
  store i32 %16, ptr %17, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %20, %.lr.ph.1
  %23 = phi i32 [ %18, %.lr.ph.1 ], [ %16, %20 ]
  %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.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %22, %.lr.ph.preheader
  %.unr = phi i32 [ %.pre, %.lr.ph.preheader ], [ %23, %22 ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.1, %22 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv.unr
  %24 = load i32, ptr %gep, align 4, !tbaa !5
  %25 = icmp sgt i32 %.unr, %24
  br i1 %25, label %26, label %._crit_edge

26:                                               ; preds = %.lr.ph.epil
  %27 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.unr
  store i32 %24, ptr %27, align 4, !tbaa !5
  store i32 %.unr, ptr %gep, align 4, !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %26, %.lr.ph.epil, %.preheader
  %28 = add nuw nsw i32 %.026, 1
  %indvars.iv.next30 = add i32 %indvars.iv29, -1
  %exitcond31.not = icmp eq i32 %28, %3
  br i1 %exitcond31.not, label %._crit_edge27, label %.preheader, !llvm.loop !11

._crit_edge27:                                    ; preds = %._crit_edge, %.preheader24
  ret void
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) 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 = { noreturn 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 = { noreturn 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}


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