; LLVM IR from JessonYue/LeetCodeLearning :: Array/luoyida/LinkedListHash.ll (Z11hash_addKeyP11_hash_tablei)

; 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._hash_node = type { i32, ptr }
%struct._hash_table = type { [7 x ptr] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11hash_addKeyP11_hash_tablei(ptr noundef %0, i32 noundef %1) #3 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %62

12:                                               ; preds = %2
  %13 = call noalias ptr @malloc(i64 noundef 16) #5
  store ptr %13, ptr %6, align 8, !tbaa !5
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = icmp eq ptr %14, null
  br i1 %15, label %16, label %17

16:                                               ; preds = %12
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %62

17:                                               ; preds = %12
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %18, i8 0, i64 16, i1 false)
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct._hash_node, ptr %20, i32 0, i32 0
  store i32 %19, ptr %21, align 8, !tbaa !11
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct._hash_node, ptr %22, i32 0, i32 1
  store ptr null, ptr %23, align 8, !tbaa !13
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct._hash_table, ptr %24, i32 0, i32 0
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = srem i32 %26, 7
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [7 x ptr], ptr %25, i64 0, i64 %28
  %30 = load ptr, ptr %29, align 8, !tbaa !5
  %31 = icmp eq ptr null, %30
  br i1 %31, label %32, label %40

32:                                               ; preds = %17
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct._hash_table, ptr %34, i32 0, i32 0
  %36 = load i32, ptr %5, align 4, !tbaa !9
  %37 = srem i32 %36, 7
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [7 x ptr], ptr %35, i64 0, i64 %38
  store ptr %33, ptr %39, align 8, !tbaa !5
  br label %61

40:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct._hash_table, ptr %41, i32 0, i32 0
  %43 = load i32, ptr %5, align 4, !tbaa !9
  %44 = srem i32 %43, 7
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [7 x ptr], ptr %42, i64 0, i64 %45
  %47 = load ptr, ptr %46, align 8, !tbaa !5
  store ptr %47, ptr %8, align 8, !tbaa !5
  br label %48

48:                                               ; preds = %53, %40
  %49 = load ptr, ptr %8, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct._hash_node, ptr %49, i32 0, i32 1
  %51 = load ptr, ptr %50, align 8, !tbaa !13
  %52 = icmp ne ptr null, %51
  br i1 %52, label %53, label %57

53:                                               ; preds = %48
  %54 = load ptr, ptr %8, align 8, !tbaa !5
  %55 = getelementptr inbounds %struct._hash_node, ptr %54, i32 0, i32 1
  %56 = load ptr, ptr %55, align 8, !tbaa !13
  store ptr %56, ptr %8, align 8, !tbaa !5
  br label %48, !llvm.loop !14

57:                                               ; preds = %48
  %58 = load ptr, ptr %6, align 8, !tbaa !5
  %59 = load ptr, ptr %8, align 8, !tbaa !5
  %60 = getelementptr inbounds %struct._hash_node, ptr %59, i32 0, i32 1
  store ptr %58, ptr %60, align 8, !tbaa !13
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  br label %61

61:                                               ; preds = %57, %32
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %62

62:                                               ; preds = %61, %16, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  %63 = load i1, ptr %3, align 1
  ret i1 %63
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { mustprogress 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 #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS10_hash_node", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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: mustprogress nofree nounwind uwtable
define dso_local noundef zeroext i1 @_Z11hash_addKeyP11_hash_tablei(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %16, label %4

4:                                                ; preds = %2
  %calloc = tail call dereferenceable_or_null(16) ptr @calloc(i64 1, i64 16)
  %5 = icmp eq ptr %calloc, null
  br i1 %5, label %16, label %6

6:                                                ; preds = %4
  store i32 %1, ptr %calloc, align 8, !tbaa !5
  %7 = srem i32 %1, 7
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [7 x ptr], ptr %0, i64 0, i64 %8
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %11 = icmp eq ptr %10, null
  br i1 %11, label %.sink.split, label %.preheader

.preheader:                                       ; preds = %6, %.preheader
  %.0 = phi ptr [ %13, %.preheader ], [ %10, %6 ]
  %12 = getelementptr inbounds i8, ptr %.0, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !12
  %.not = icmp eq ptr %13, null
  br i1 %.not, label %14, label %.preheader, !llvm.loop !13

14:                                               ; preds = %.preheader
  %15 = getelementptr inbounds i8, ptr %.0, i64 8
  br label %.sink.split

.sink.split:                                      ; preds = %6, %14
  %.sink = phi ptr [ %15, %14 ], [ %9, %6 ]
  store ptr %calloc, ptr %.sink, align 8, !tbaa !11
  br label %16

16:                                               ; preds = %.sink.split, %4, %2
  %.017 = phi i1 [ false, %2 ], [ false, %4 ], [ true, %.sink.split ]
  ret i1 %.017
}

; Function Attrs: nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree 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 = { nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" }

!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 = !{!"_ZTS10_hash_node", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!10, !10, i64 0}
!12 = !{!6, !10, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass