; LLVM IR from ImChong/Practice_LeetCode_C :: F02_Programming_Topics/F01_Data_Structure/02_Linked_List/06_GetIntersectionNode (Test3)

; 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"

@__const.Test3.arrA = external hidden unnamed_addr constant [3 x i32], align 4
@__const.Test3.arrB = external hidden unnamed_addr constant [2 x i32], align 4

; 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

declare ptr @LinkedList_ArrayInit(ptr noundef, i32 noundef) #2

declare ptr @getIntersectionNode(ptr noundef, ptr noundef) #2

; 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
define dso_local void @Test3() #3 {
  %1 = alloca [3 x i32], align 4
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca [2 x i32], align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 12, ptr %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %1, ptr align 4 @__const.Test3.arrA, i64 12, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 3, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %9 = getelementptr inbounds [3 x i32], ptr %1, i64 0, i64 0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = call ptr @LinkedList_ArrayInit(ptr noundef %9, i32 noundef %10)
  store ptr %11, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %4, ptr align 4 @__const.Test3.arrB, i64 8, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 2, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %12 = getelementptr inbounds [2 x i32], ptr %4, i64 0, i64 0
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = call ptr @LinkedList_ArrayInit(ptr noundef %12, i32 noundef %13)
  store ptr %14, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %15 = load ptr, ptr %3, align 8, !tbaa !9
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = call ptr @getIntersectionNode(ptr noundef %15, ptr noundef %16)
  store ptr %17, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  store ptr null, ptr %8, align 8, !tbaa !9
  %18 = load ptr, ptr %8, align 8, !tbaa !9
  %19 = load ptr, ptr %7, align 8, !tbaa !9
  call void @Validate_LinkedList(i8 noundef signext 51, ptr noundef %18, ptr noundef %19)
  %20 = load ptr, ptr %3, align 8, !tbaa !9
  call void @LinkedList_Free(ptr noundef %20)
  %21 = load ptr, ptr %6, align 8, !tbaa !9
  call void @LinkedList_Free(ptr noundef %21)
  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 8, 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 12, ptr %1) #4
  ret void
}

declare void @Validate_LinkedList(i8 noundef signext, ptr noundef, ptr noundef) #2

declare void @LinkedList_Free(ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 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 = { 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}


; 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.Test3.arrA = external hidden unnamed_addr constant [3 x i32], align 4
@__const.Test3.arrB = external hidden unnamed_addr constant [2 x i32], align 4

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; 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) #1

declare ptr @LinkedList_ArrayInit(ptr noundef, i32 noundef) local_unnamed_addr #2

declare ptr @getIntersectionNode(ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @Test3() local_unnamed_addr #3 {
  %1 = alloca [3 x i32], align 4
  %2 = alloca [2 x i32], align 8
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(12) %1, ptr noundef nonnull align 4 dereferenceable(12) @__const.Test3.arrA, i64 12, i1 false)
  %3 = call ptr @LinkedList_ArrayInit(ptr noundef nonnull %1, i32 noundef 3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %4 = load i64, ptr @__const.Test3.arrB, align 4
  store i64 %4, ptr %2, align 8
  %5 = call ptr @LinkedList_ArrayInit(ptr noundef nonnull %2, i32 noundef 2) #4
  %6 = call ptr @getIntersectionNode(ptr noundef %3, ptr noundef %5) #4
  call void @Validate_LinkedList(i8 noundef signext 51, ptr noundef null, ptr noundef %6) #4
  call void @LinkedList_Free(ptr noundef %3) #4
  call void @LinkedList_Free(ptr noundef %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %1) #4
  ret void
}

declare void @Validate_LinkedList(i8 noundef signext, ptr noundef, ptr noundef) local_unnamed_addr #2

declare void @LinkedList_Free(ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 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 = { 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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass