; LLVM IR from ImChong/Practice_LeetCode_C :: F02_Programming_Topics/F01_Data_Structure/03_Hash_Table/03_IsHappy/src (isHappy)

; 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"

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @isHappy(i32 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i32, align 4
  %4 = alloca [163 x i32], align 16
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 652, ptr %4) #4
  call void @llvm.memset.p0.i64(ptr align 16 %4, i8 0, i64 652, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = call i32 @getNext(i32 noundef %8)
  store i32 %9, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %10 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %10, ptr %6, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %23, %1
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 1
  br i1 %13, label %14, label %28

14:                                               ; preds = %11
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = call i32 @getNext(i32 noundef %15)
  store i32 %16, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [163 x i32], ptr %4, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = icmp ne i32 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %14
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %29

23:                                               ; preds = %14
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [163 x i32], ptr %4, i64 0, i64 %25
  store i32 1, ptr %26, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %27, ptr %6, align 4, !tbaa !5
  br label %11, !llvm.loop !9

28:                                               ; preds = %11
  store i1 true, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %29

29:                                               ; preds = %28, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 652, ptr %4) #4
  %30 = load i1, ptr %2, align 1
  ret i1 %30
}

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare i32 @getNext(i32 noundef) #3

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

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 = distinct !{!9, !10}
!10 = !{!"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
define dso_local noundef zeroext i1 @isHappy(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca [163 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 652, ptr nonnull %2) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(652) %2, i8 0, i64 652, i1 false)
  %3 = tail call i32 @getNext(i32 noundef %0) #4
  %.not9 = icmp eq i32 %3, 1
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %8
  %.010 = phi i32 [ %4, %8 ], [ %3, %1 ]
  %4 = tail call i32 @getNext(i32 noundef %.010) #4
  %5 = sext i32 %4 to i64
  %6 = getelementptr inbounds [163 x i32], ptr %2, i64 0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.not8 = icmp eq i32 %7, 0
  br i1 %.not8, label %8, label %._crit_edge

8:                                                ; preds = %.lr.ph
  store i32 1, ptr %6, align 4, !tbaa !5
  %.not = icmp eq i32 %4, 1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %8, %1
  %.not.lcssa = phi i1 [ true, %1 ], [ %.not8, %8 ], [ %.not8, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 652, ptr nonnull %2) #4
  ret i1 %.not.lcssa
}

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare i32 @getNext(i32 noundef) local_unnamed_addr #3

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

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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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