; LLVM IR from mahendramahara/DSA-in-C-Programing :: SEARCHING (HashTable-Chaining)

; 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 { [10 x ptr] }

@.str = external hidden unnamed_addr constant [22 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [22 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @insert(ptr noundef, i32 noundef, i32 noundef) #0

; 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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @search(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %struct.HashTable, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 80, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %17, %0
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp slt i32 %9, 10
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %20

12:                                               ; preds = %8
  %13 = getelementptr inbounds %struct.HashTable, ptr %2, i32 0, i32 0
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [10 x ptr], ptr %13, i64 0, i64 %15
  store ptr null, ptr %16, align 8, !tbaa !9
  br label %17

17:                                               ; preds = %12
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %3, align 4, !tbaa !5
  br label %8, !llvm.loop !11

20:                                               ; preds = %11
  call void @insert(ptr noundef %2, i32 noundef 12, i32 noundef 100)
  call void @insert(ptr noundef %2, i32 noundef 25, i32 noundef 200)
  call void @insert(ptr noundef %2, i32 noundef 35, i32 noundef 300)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %21 = call i32 @search(ptr noundef %2, i32 noundef 12)
  store i32 %21, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %22 = call i32 @search(ptr noundef %2, i32 noundef 25)
  store i32 %22, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %23 = call i32 @search(ptr noundef %2, i32 noundef 35)
  store i32 %23, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %24 = call i32 @search(ptr noundef %2, i32 noundef 99)
  store i32 %24, ptr %7, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %25)
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %27)
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %29)
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %31)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 80, ptr %2) #3
  ret i32 0
}

declare i32 @printf(ptr noundef, ...) #2

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 = { "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 }

!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 = 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.HashTable = type { [10 x ptr] }

@.str = external hidden unnamed_addr constant [22 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [22 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [22 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @insert(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; 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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %struct.HashTable, align 8
  call void @llvm.lifetime.start.p0(i64 80, ptr nonnull %1) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(80) %1, i8 0, i64 80, i1 false), !tbaa !5
  call void @insert(ptr noundef nonnull %1, i32 noundef 12, i32 noundef 100)
  call void @insert(ptr noundef nonnull %1, i32 noundef 25, i32 noundef 200)
  call void @insert(ptr noundef nonnull %1, i32 noundef 35, i32 noundef 300)
  %2 = call i32 @search(ptr noundef nonnull %1, i32 noundef 12)
  %3 = call i32 @search(ptr noundef nonnull %1, i32 noundef 25)
  %4 = call i32 @search(ptr noundef nonnull %1, i32 noundef 35)
  %5 = call i32 @search(ptr noundef nonnull %1, i32 noundef 99)
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %2)
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i32 noundef %3)
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %4)
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %5)
  call void @llvm.lifetime.end.p0(i64 80, ptr nonnull %1) #4
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 = { nofree nounwind "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass