; LLVM IR from yanglr/leetcode-ac :: algo-basic/acwing785-quick-sort_while_hardcode_input.ll (Z9quickSortPiii)

; 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: mustprogress uwtable
define dso_local void @_Z9quickSortPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = icmp sge i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %3
  br label %81

14:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = add nsw i32 %16, %17
  %19 = sdiv i32 %18, 2
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %15, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  store i32 %22, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = sub nsw i32 %23, 1
  store i32 %24, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %9, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %72, %14
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = load i32, ptr %9, align 4, !tbaa !9
  %30 = icmp slt i32 %28, %29
  br i1 %30, label %31, label %73

31:                                               ; preds = %27
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %8, align 4, !tbaa !9
  br label %34

34:                                               ; preds = %42, %31
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds i32, ptr %35, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !9
  %40 = load i32, ptr %7, align 4, !tbaa !9
  %41 = icmp slt i32 %39, %40
  br i1 %41, label %42, label %45

42:                                               ; preds = %34
  %43 = load i32, ptr %8, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %8, align 4, !tbaa !9
  br label %34, !llvm.loop !11

45:                                               ; preds = %34
  %46 = load i32, ptr %9, align 4, !tbaa !9
  %47 = add nsw i32 %46, -1
  store i32 %47, ptr %9, align 4, !tbaa !9
  br label %48

48:                                               ; preds = %56, %45
  %49 = load ptr, ptr %4, align 8, !tbaa !5
  %50 = load i32, ptr %9, align 4, !tbaa !9
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds i32, ptr %49, i64 %51
  %53 = load i32, ptr %52, align 4, !tbaa !9
  %54 = load i32, ptr %7, align 4, !tbaa !9
  %55 = icmp sgt i32 %53, %54
  br i1 %55, label %56, label %59

56:                                               ; preds = %48
  %57 = load i32, ptr %9, align 4, !tbaa !9
  %58 = add nsw i32 %57, -1
  store i32 %58, ptr %9, align 4, !tbaa !9
  br label %48, !llvm.loop !13

59:                                               ; preds = %48
  %60 = load i32, ptr %8, align 4, !tbaa !9
  %61 = load i32, ptr %9, align 4, !tbaa !9
  %62 = icmp slt i32 %60, %61
  br i1 %62, label %63, label %72

63:                                               ; preds = %59
  %64 = load ptr, ptr %4, align 8, !tbaa !5
  %65 = load i32, ptr %8, align 4, !tbaa !9
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds i32, ptr %64, i64 %66
  %68 = load ptr, ptr %4, align 8, !tbaa !5
  %69 = load i32, ptr %9, align 4, !tbaa !9
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds i32, ptr %68, i64 %70
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %67, ptr noundef nonnull align 4 dereferenceable(4) %71) #3
  br label %72

72:                                               ; preds = %63, %59
  br label %27, !llvm.loop !14

73:                                               ; preds = %27
  %74 = load ptr, ptr %4, align 8, !tbaa !5
  %75 = load i32, ptr %5, align 4, !tbaa !9
  %76 = load i32, ptr %9, align 4, !tbaa !9
  call void @_Z9quickSortPiii(ptr noundef %74, i32 noundef %75, i32 noundef %76)
  %77 = load ptr, ptr %4, align 8, !tbaa !5
  %78 = load i32, ptr %9, align 4, !tbaa !9
  %79 = add nsw i32 %78, 1
  %80 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z9quickSortPiii(ptr noundef %77, i32 noundef %79, i32 noundef %80)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %81

81:                                               ; preds = %73, %13
  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: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

attributes #0 = { mustprogress 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 = { inlinehint 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 #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 = !{!"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}
!14 = distinct !{!14, !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 nounwind uwtable
define dso_local void @_Z9quickSortPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not42 = icmp slt i32 %1, %2
  br i1 %.not42, label %.lr.ph, label %tailrecurse._crit_edge

.lr.ph:                                           ; preds = %3
  %4 = add nsw i32 %2, 1
  br label %5

5:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr3543 = phi i32 [ %1, %.lr.ph ], [ %29, %tailrecurse ]
  %6 = add nsw i32 %.tr3543, %2
  %7 = sdiv i32 %6, 2
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds i32, ptr %0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %.not45 = icmp sgt i32 %.tr3543, %4
  br i1 %.not45, label %tailrecurse, label %.preheader37.preheader

.preheader37.preheader:                           ; preds = %5
  %11 = add nsw i32 %.tr3543, -1
  br label %.preheader37

.preheader37:                                     ; preds = %27, %.preheader37.preheader
  %.041 = phi i32 [ %25, %27 ], [ %4, %.preheader37.preheader ]
  %.03040 = phi i32 [ %18, %27 ], [ %11, %.preheader37.preheader ]
  %12 = sext i32 %.03040 to i64
  br label %13

13:                                               ; preds = %.preheader37, %13
  %indvars.iv = phi i64 [ %12, %.preheader37 ], [ %indvars.iv.next, %13 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %14 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = icmp slt i32 %15, %10
  br i1 %16, label %13, label %.preheader, !llvm.loop !9

.preheader:                                       ; preds = %13
  %17 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %18 = trunc nsw i64 %indvars.iv.next to i32
  %19 = sext i32 %.041 to i64
  br label %20

20:                                               ; preds = %.preheader, %20
  %indvars.iv48 = phi i64 [ %19, %.preheader ], [ %indvars.iv.next49, %20 ]
  %indvars.iv.next49 = add nsw i64 %indvars.iv48, -1
  %21 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next49
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp sgt i32 %22, %10
  br i1 %23, label %20, label %24, !llvm.loop !11

24:                                               ; preds = %20
  %25 = trunc nsw i64 %indvars.iv.next49 to i32
  %26 = icmp slt i64 %indvars.iv.next, %indvars.iv.next49
  br i1 %26, label %27, label %tailrecurse

27:                                               ; preds = %24
  %28 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next49
  tail call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %17, ptr noundef nonnull align 4 dereferenceable(4) %28) #2
  br label %.preheader37

tailrecurse:                                      ; preds = %24, %5
  %.0.lcssa = phi i32 [ %4, %5 ], [ %25, %24 ]
  tail call void @_Z9quickSortPiii(ptr noundef nonnull %0, i32 noundef %.tr3543, i32 noundef %.0.lcssa)
  %29 = add nsw i32 %.0.lcssa, 1
  %.not = icmp slt i32 %29, %2
  br i1 %.not, label %5, label %tailrecurse._crit_edge

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %3
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

attributes #0 = { 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 #1 = { inlinehint 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 = !{!"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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass