; LLVM IR from JessonYue/LeetCodeLearning :: Array/huangxinyu/c/PageReplace.ll (Z4fifoiPKii)

; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%struct.PhysicalPage = type { i32 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4findPK12PhysicalPageii(ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4fifoiPKii(i32 noundef %0, ptr noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #7
  store i32 0, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = zext i32 %13 to i64
  %15 = call ptr @llvm.stacksave.p0()
  store ptr %15, ptr %8, align 8
  %16 = alloca %struct.PhysicalPage, i64 %14, align 16
  store i64 %14, ptr %9, align 8
  %17 = icmp eq i64 %14, 0
  br i1 %17, label %24, label %18

18:                                               ; preds = %3
  %19 = getelementptr inbounds %struct.PhysicalPage, ptr %16, i64 %14
  br label %20

20:                                               ; preds = %20, %18
  %21 = phi ptr [ %16, %18 ], [ %22, %20 ]
  call void @_ZN12PhysicalPageC2Ev(ptr noundef nonnull align 4 dereferenceable(4) %21) #7
  %22 = getelementptr inbounds %struct.PhysicalPage, ptr %21, i64 1
  %23 = icmp eq ptr %22, %19
  br i1 %23, label %24, label %20

24:                                               ; preds = %20, %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #7
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %62, %24
  %26 = load i32, ptr %10, align 4, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %30, label %29

29:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #7
  br label %65

30:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #7
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = load ptr, ptr %5, align 8, !tbaa !9
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !5
  %37 = call noundef i32 @_Z4findPK12PhysicalPageii(ptr noundef %16, i32 noundef %31, i32 noundef %36)
  store i32 %37, ptr %11, align 4, !tbaa !5
  %38 = load i32, ptr %11, align 4, !tbaa !5
  %39 = icmp slt i32 %38, 0
  br i1 %39, label %40, label %61

40:                                               ; preds = %30
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #7
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %4, align 4, !tbaa !5
  %43 = srem i32 %41, %42
  store i32 %43, ptr %12, align 4, !tbaa !5
  %44 = load ptr, ptr %5, align 8, !tbaa !9
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds i32, ptr %44, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = load i32, ptr %12, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds %struct.PhysicalPage, ptr %16, i64 %50
  %52 = getelementptr inbounds %struct.PhysicalPage, ptr %51, i32 0, i32 0
  store i32 %48, ptr %52, align 4, !tbaa !11
  %53 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str)
  %54 = load i32, ptr %7, align 4, !tbaa !5
  %55 = add nsw i32 %54, 1
  store i32 %55, ptr %7, align 4, !tbaa !5
  %56 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %53, i32 noundef %55)
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %56, ptr noundef @.str.1)
  %58 = load i32, ptr %12, align 4, !tbaa !5
  %59 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %57, i32 noundef %58)
  %60 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %59, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #7
  br label %61

61:                                               ; preds = %40, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #7
  br label %62

62:                                               ; preds = %61
  %63 = load i32, ptr %10, align 4, !tbaa !5
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %10, align 4, !tbaa !5
  br label %25, !llvm.loop !13

65:                                               ; preds = %29
  %66 = load ptr, ptr %8, align 8
  call void @llvm.stackrestore.p0(ptr %66)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #7
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN12PhysicalPageC2Ev(ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #4 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #5

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #6

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #5

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { nocallback nofree nosync nounwind willreturn }
attributes #4 = { 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 #5 = { inlinehint 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 #6 = { "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 #7 = { 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS12PhysicalPage", !6, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%struct.PhysicalPage = type { i32 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z4findPK12PhysicalPageii(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z4fifoiPKii(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = zext i32 %0 to i64
  %5 = alloca %struct.PhysicalPage, i64 %4, align 16
  %6 = icmp eq i32 %0, 0
  br i1 %6, label %.loopexit, label %7

7:                                                ; preds = %3
  %8 = getelementptr inbounds %struct.PhysicalPage, ptr %5, i64 %4
  br label %9

9:                                                ; preds = %9, %7
  %10 = phi ptr [ %5, %7 ], [ %11, %9 ]
  call void @_ZN12PhysicalPageC2Ev(ptr noundef nonnull align 4 dereferenceable(4) %10) #5
  %11 = getelementptr inbounds i8, ptr %10, i64 4
  %12 = icmp eq ptr %11, %8
  br i1 %12, label %.loopexit, label %9

.loopexit:                                        ; preds = %9, %3
  %13 = icmp sgt i32 %2, 0
  br i1 %13, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.loopexit
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %29, %.loopexit
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader, %29
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %29 ]
  %.018 = phi i32 [ 0, %.lr.ph.preheader ], [ %.1, %29 ]
  %14 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = call noundef i32 @_Z4findPK12PhysicalPageii(ptr noundef nonnull %5, i32 noundef %0, i32 noundef %15)
  %17 = icmp slt i32 %16, 0
  br i1 %17, label %18, label %29

18:                                               ; preds = %.lr.ph
  %19 = srem i32 %.018, %0
  %20 = load i32, ptr %14, align 4, !tbaa !5
  %21 = sext i32 %19 to i64
  %22 = getelementptr inbounds %struct.PhysicalPage, ptr %5, i64 %21
  store i32 %20, ptr %22, align 4, !tbaa !9
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str)
  %24 = add nsw i32 %.018, 1
  %25 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %23, i32 noundef %24)
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %25, ptr noundef nonnull @.str.1)
  %27 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) %26, i32 noundef %19)
  %28 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) %27, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %29

29:                                               ; preds = %18, %.lr.ph
  %.1 = phi i32 [ %24, %18 ], [ %.018, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZN12PhysicalPageC2Ev(ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #3

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #3

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 = { 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 #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 = { inlinehint 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 #4 = { "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 #5 = { 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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS12PhysicalPage", !6, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass