; LLVM IR from JessonYue/LeetCodeLearning :: Array/luobiao/BaseDataStructure (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
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = call i32 @getHashAddress(i32 noundef %4)
  store i32 %5, ptr %3, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %27, %1
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [10 x %struct.HashNode], ptr @hashTable, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.HashNode, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %24

13:                                               ; preds = %6
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [10 x %struct.HashNode], ptr @hashTable, i64 0, i64 %15
  %17 = getelementptr inbounds %struct.HashNode, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !11
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = icmp eq i32 %18, %19
  br i1 %20, label %21, label %24

21:                                               ; preds = %13
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = icmp slt i32 %22, 10
  br label %24

24:                                               ; preds = %21, %13, %6
  %25 = phi i1 [ false, %13 ], [ false, %6 ], [ %23, %21 ]
  %26 = xor i1 %25, true
  br i1 %26, label %27, label %30

27:                                               ; preds = %24
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %3, align 4, !tbaa !5
  br label %6, !llvm.loop !12

30:                                               ; preds = %24
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = icmp eq i32 %31, 10
  br i1 %32, label %33, label %34

33:                                               ; preds = %30
  store i32 -1, ptr %3, align 4, !tbaa !5
  br label %34

34:                                               ; preds = %33, %30
  %35 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %35
}

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 4}
!10 = !{!"HashNode", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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 = %.critedge, %1
  %indvars.iv = phi i64 [ %indvars.iv.next, %.critedge ], [ %3, %1 ]
  %5 = getelementptr inbounds [10 x %struct.HashNode], ptr @hashTable, i64 0, i64 %indvars.iv
  %6 = getelementptr inbounds i8, ptr %5, i64 4
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %.critedge

9:                                                ; preds = %4
  %10 = load i32, ptr %5, align 8, !tbaa !10
  %11 = icmp eq i32 %10, %0
  %12 = icmp slt i64 %indvars.iv, 10
  %spec.select = and i1 %12, %11
  br i1 %spec.select, label %13, label %.critedge

.critedge:                                        ; preds = %4, %9
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  br label %4, !llvm.loop !11

13:                                               ; preds = %9
  %14 = trunc nsw i64 %indvars.iv to i32
  ret i32 %14
}

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 4}
!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 = !{!6, !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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