; LLVM IR from ImChong/Practice_LeetCode_C :: F02_Programming_Topics/F01_Data_Structure/02_Linked_List/06_GetIntersectionNode (Test1)

; 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.ListNode = type { i32, ptr }

@__const.Test1.arrA = external hidden unnamed_addr constant [5 x i32], align 16
@__const.Test1.arrB = external hidden unnamed_addr constant [3 x i32], align 4

; Function Attrs: nounwind uwtable
define dso_local void @Test1() #0 {
  %1 = alloca [5 x i32], align 16
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca [3 x i32], align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 20, ptr %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %1, ptr align 16 @__const.Test1.arrA, i64 20, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 5, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %10 = getelementptr inbounds [5 x i32], ptr %1, i64 0, i64 0
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = call ptr @LinkedList_ArrayInit(ptr noundef %10, i32 noundef %11)
  store ptr %12, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 12, ptr %4) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %4, ptr align 4 @__const.Test1.arrB, i64 12, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 3, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %13 = getelementptr inbounds [3 x i32], ptr %4, i64 0, i64 0
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = call ptr @LinkedList_ArrayInit(ptr noundef %13, i32 noundef %14)
  store ptr %15, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %16, ptr %7, align 8, !tbaa !9
  br label %17

17:                                               ; preds = %22, %0
  %18 = load ptr, ptr %7, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.ListNode, ptr %18, i32 0, i32 1
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  %21 = icmp ne ptr %20, null
  br i1 %21, label %22, label %26

22:                                               ; preds = %17
  %23 = load ptr, ptr %7, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct.ListNode, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !11
  store ptr %25, ptr %7, align 8, !tbaa !9
  br label %17, !llvm.loop !13

26:                                               ; preds = %17
  %27 = load ptr, ptr %3, align 8, !tbaa !9
  %28 = getelementptr inbounds %struct.ListNode, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !11
  %30 = getelementptr inbounds %struct.ListNode, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !11
  %32 = load ptr, ptr %7, align 8, !tbaa !9
  %33 = getelementptr inbounds %struct.ListNode, ptr %32, i32 0, i32 1
  store ptr %31, ptr %33, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %34 = load ptr, ptr %3, align 8, !tbaa !9
  %35 = load ptr, ptr %6, align 8, !tbaa !9
  %36 = call ptr @getIntersectionNode(ptr noundef %34, ptr noundef %35)
  store ptr %36, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #4
  store i32 8, ptr %9, align 4, !tbaa !5
  %37 = load i32, ptr %9, align 4, !tbaa !5
  %38 = load ptr, ptr %8, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.ListNode, ptr %38, i32 0, i32 0
  %40 = load i32, ptr %39, align 8, !tbaa !15
  %41 = call i32 @Validate_SingleValue(i8 noundef signext 49, i32 noundef %37, i32 noundef %40)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 12, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 20, ptr %1) #4
  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: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

declare ptr @LinkedList_ArrayInit(ptr noundef, i32 noundef) #3

declare ptr @getIntersectionNode(ptr noundef, ptr noundef) #3

declare i32 @Validate_SingleValue(i8 noundef signext, i32 noundef, i32 noundef) #3

; 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"ListNode", !6, i64 0, !10, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!12, !6, i64 0}


; 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"

@__const.Test1.arrA = external hidden unnamed_addr constant [5 x i32], align 16
@__const.Test1.arrB = external hidden unnamed_addr constant [3 x i32], align 4

; Function Attrs: nounwind uwtable
define dso_local void @Test1() local_unnamed_addr #0 {
  %1 = alloca [5 x i32], align 16
  %2 = alloca [3 x i32], align 4
  call void @llvm.lifetime.start.p0(i64 20, ptr nonnull %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(20) %1, ptr noundef nonnull align 16 dereferenceable(20) @__const.Test1.arrA, i64 20, i1 false)
  %3 = call ptr @LinkedList_ArrayInit(ptr noundef nonnull %1, i32 noundef 5) #4
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %2) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(12) %2, ptr noundef nonnull align 4 dereferenceable(12) @__const.Test1.arrB, i64 12, i1 false)
  %4 = call ptr @LinkedList_ArrayInit(ptr noundef nonnull %2, i32 noundef 3) #4
  br label %5

5:                                                ; preds = %5, %0
  %.0 = phi ptr [ %4, %0 ], [ %7, %5 ]
  %6 = getelementptr inbounds i8, ptr %.0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %8, label %5, !llvm.loop !11

8:                                                ; preds = %5
  %9 = getelementptr inbounds i8, ptr %.0, i64 8
  %10 = getelementptr inbounds i8, ptr %3, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %11, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  store ptr %13, ptr %9, align 8, !tbaa !5
  %14 = call ptr @getIntersectionNode(ptr noundef %3, ptr noundef %4) #4
  %15 = load i32, ptr %14, align 8, !tbaa !13
  %16 = call i32 @Validate_SingleValue(i8 noundef signext 49, i32 noundef 8, i32 noundef %15) #4
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 20, ptr nonnull %1) #4
  ret void
}

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

declare ptr @LinkedList_ArrayInit(ptr noundef, i32 noundef) local_unnamed_addr #3

declare ptr @getIntersectionNode(ptr noundef, ptr noundef) local_unnamed_addr #3

declare i32 @Validate_SingleValue(i8 noundef signext, i32 noundef, i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 = { 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, !10, i64 8}
!6 = !{!"ListNode", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!6, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopUnrollPass,SROAPass,SimplifyCFGPass