; LLVM IR from ImChong/Practice_LeetCode_C :: F01_Common_Functions/src (common_hash_table)

; 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.HashTable = type { i32, ptr }
%struct.HashNode = type { i32, %union.anon, ptr }
%union.anon = type { i32 }

; 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 hidden i32 @getHashSlot(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @HashTable_Search(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = load i32, ptr %4, align 4, !tbaa !9
  %10 = call i32 @getHashSlot(ptr noundef %8, i32 noundef %9)
  store i32 %10, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.HashTable, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = load i32, ptr %5, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds ptr, ptr %13, i64 %15
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  store ptr %17, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %33, %2
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %37

21:                                               ; preds = %18
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.HashNode, ptr %22, i32 0, i32 0
  %24 = load i32, ptr %23, align 8, !tbaa !13
  %25 = load i32, ptr %4, align 4, !tbaa !9
  %26 = icmp eq i32 %24, %25
  br i1 %26, label %27, label %33

27:                                               ; preds = %21
  %28 = load ptr, ptr %6, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.HashNode, ptr %28, i32 0, i32 1
  %30 = load i32, ptr %29, align 4, !tbaa !15
  %31 = load i32, ptr %7, align 4, !tbaa !9
  %32 = add nsw i32 %31, %30
  store i32 %32, ptr %7, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %27, %21
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.HashNode, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !16
  store ptr %36, ptr %6, align 8, !tbaa !5
  br label %18, !llvm.loop !17

37:                                               ; preds = %18
  %38 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %38
}

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 = { 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 8}
!12 = !{!"HashTable", !10, i64 0, !6, i64 8}
!13 = !{!14, !10, i64 0}
!14 = !{!"HashNode", !10, i64 0, !7, i64 4, !6, i64 8}
!15 = !{!7, !7, i64 0}
!16 = !{!14, !6, i64 8}
!17 = distinct !{!17, !18}
!18 = !{!"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"

; Function Attrs: nounwind uwtable
declare hidden i32 @getHashSlot(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @HashTable_Search(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @getHashSlot(ptr noundef %0, i32 noundef %1)
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = sext i32 %3 to i64
  %7 = getelementptr inbounds ptr, ptr %5, i64 %6
  %.01011 = load ptr, ptr %7, align 8, !tbaa !11
  %.not12 = icmp eq ptr %.01011, null
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %14
  %.01014 = phi ptr [ %.010, %14 ], [ %.01011, %2 ]
  %.013 = phi i32 [ %.1, %14 ], [ 0, %2 ]
  %8 = load i32, ptr %.01014, align 8, !tbaa !12
  %9 = icmp eq i32 %8, %1
  br i1 %9, label %10, label %14

10:                                               ; preds = %.lr.ph
  %11 = getelementptr inbounds i8, ptr %.01014, i64 4
  %12 = load i32, ptr %11, align 4, !tbaa !14
  %13 = add nsw i32 %12, %.013
  br label %14

14:                                               ; preds = %10, %.lr.ph
  %.1 = phi i32 [ %13, %10 ], [ %.013, %.lr.ph ]
  %15 = getelementptr inbounds i8, ptr %.01014, i64 8
  %.010 = load ptr, ptr %15, align 8, !tbaa !11
  %.not = icmp eq ptr %.010, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !15

._crit_edge:                                      ; preds = %14, %2
  %.0.lcssa = phi i32 [ 0, %2 ], [ %.1, %14 ]
  ret i32 %.0.lcssa
}

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" }

!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 = !{!"HashTable", !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 = !{!10, !10, i64 0}
!12 = !{!13, !7, i64 0}
!13 = !{!"HashNode", !7, i64 0, !8, i64 4, !10, i64 8}
!14 = !{!8, !8, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass