; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (Ip4CleanAssembleTable)

; 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"

%struct.IP4_ASSEMBLE_TABLE = type { [31 x %struct._LIST_ENTRY] }
%struct._LIST_ENTRY = type { ptr, ptr }

; 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 @Ip4FreeAssembleEntry(ptr noundef) #1

declare ptr @RemoveEntryList(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local void @Ip4CleanAssembleTable(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %7

7:                                                ; preds = %43, %1
  %8 = load i32, ptr %6, align 4, !tbaa !9
  %9 = icmp ult i32 %8, 31
  br i1 %9, label %10, label %46

10:                                               ; preds = %7
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.IP4_ASSEMBLE_TABLE, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = zext i32 %13 to i64
  %15 = getelementptr inbounds [31 x %struct._LIST_ENTRY], ptr %12, i64 0, i64 %14
  %16 = getelementptr inbounds %struct._LIST_ENTRY, ptr %15, i32 0, i32 0
  %17 = load ptr, ptr %16, align 8, !tbaa !11
  store ptr %17, ptr %3, align 8, !tbaa !5
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct._LIST_ENTRY, ptr %18, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  store ptr %20, ptr %4, align 8, !tbaa !5
  br label %21

21:                                               ; preds = %37, %10
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.IP4_ASSEMBLE_TABLE, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = zext i32 %25 to i64
  %27 = getelementptr inbounds [31 x %struct._LIST_ENTRY], ptr %24, i64 0, i64 %26
  %28 = icmp ne ptr %22, %27
  br i1 %28, label %29, label %42

29:                                               ; preds = %21
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = ptrtoint ptr %30 to i64
  %32 = sub i64 %31, 0
  %33 = inttoptr i64 %32 to ptr
  store ptr %33, ptr %5, align 8, !tbaa !5
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = call ptr @RemoveEntryList(ptr noundef %34)
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  call void @Ip4FreeAssembleEntry(ptr noundef %36)
  br label %37

37:                                               ; preds = %29
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %38, ptr %3, align 8, !tbaa !5
  %39 = load ptr, ptr %3, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct._LIST_ENTRY, ptr %39, i32 0, i32 0
  %41 = load ptr, ptr %40, align 8, !tbaa !11
  store ptr %41, ptr %4, align 8, !tbaa !5
  br label %21, !llvm.loop !13

42:                                               ; preds = %21
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %6, align 4, !tbaa !9
  %45 = add i32 %44, 1
  store i32 %45, ptr %6, align 4, !tbaa !9
  br label %7, !llvm.loop !15

46:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  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 = { "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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_LIST_ENTRY", !6, i64 0, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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"

%struct._LIST_ENTRY = type { ptr, ptr }

; Function Attrs: nounwind uwtable
declare dso_local void @Ip4FreeAssembleEntry(ptr noundef) local_unnamed_addr #0

declare ptr @RemoveEntryList(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @Ip4CleanAssembleTable(ptr noundef readonly %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %1, %._crit_edge
  %indvars.iv = phi i64 [ 0, %1 ], [ %indvars.iv.next, %._crit_edge ]
  %3 = getelementptr inbounds [31 x %struct._LIST_ENTRY], ptr %0, i64 0, i64 %indvars.iv
  %4 = load ptr, ptr %3, align 8, !tbaa !5
  %.not14 = icmp eq ptr %4, %3
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.01215 = phi ptr [ %.013, %.lr.ph ], [ %4, %2 ]
  %.013 = load ptr, ptr %.01215, align 8, !tbaa !5
  %5 = tail call ptr @RemoveEntryList(ptr noundef nonnull %.01215) #2
  tail call void @Ip4FreeAssembleEntry(ptr noundef nonnull %.01215)
  %.not = icmp eq ptr %.013, %3
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %2
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 31
  br i1 %exitcond.not, label %6, label %2, !llvm.loop !12

6:                                                ; preds = %._crit_edge
  ret void
}

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 = { "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, !7, i64 0}
!6 = !{!"_LIST_ENTRY", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}


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