; LLVM IR from JessonYue/LeetCodeLearning :: Array/linchuanxin/homework/homework_0629_0705/linkedHash (hash)

; 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.HashNode = type { i32, i32 }

@hashTable = external dso_local global [10 x %struct.HashNode], align 16

; 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 i32 @getHashAddress(i32 noundef) #1

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

8:                                                ; preds = %22, %1
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [10 x %struct.HashNode], ptr @hashTable, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.HashNode, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !9
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp eq i32 %13, %14
  br i1 %15, label %16, label %19

16:                                               ; preds = %8
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = icmp slt i32 %17, 10
  br label %19

19:                                               ; preds = %16, %8
  %20 = phi i1 [ false, %8 ], [ %18, %16 ]
  %21 = xor i1 %20, true
  br i1 %21, label %22, label %25

22:                                               ; preds = %19
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr %4, align 4, !tbaa !5
  br label %8, !llvm.loop !11

25:                                               ; preds = %19
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = icmp eq i32 %26, 10
  br i1 %27, label %28, label %29

28:                                               ; preds = %25
  store i32 -1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %31

29:                                               ; preds = %25
  %30 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %30, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %31

31:                                               ; preds = %29, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %32 = load i32, ptr %2, align 4
  ret i32 %32
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"HashNode", !6, i64 0, !6, i64 4}
!11 = distinct !{!11, !12}
!12 = !{!"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"

%struct.HashNode = type { i32, i32 }

@hashTable = external dso_local local_unnamed_addr global [10 x %struct.HashNode], align 16

; Function Attrs: nounwind uwtable
declare dso_local i32 @getHashAddress(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @find(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @getHashAddress(i32 noundef %0)
  %3 = sext i32 %2 to i64
  br label %4

4:                                                ; preds = %4, %1
  %indvars.iv = phi i64 [ %indvars.iv.next, %4 ], [ %3, %1 ]
  %5 = getelementptr inbounds [10 x %struct.HashNode], ptr @hashTable, i64 0, i64 %indvars.iv
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = icmp ne i32 %6, %0
  %8 = icmp sgt i64 %indvars.iv, 9
  %.not10 = or i1 %8, %7
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  br i1 %.not10, label %4, label %9, !llvm.loop !10

9:                                                ; preds = %4
  %10 = trunc nsw i64 %indvars.iv to i32
  ret i32 %10
}

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, !7, i64 0}
!6 = !{!"HashNode", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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