; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/Hashing/Chaining/chainingHashing.ll (Z3addii)

; 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.Node = type { i32, ptr }

@head = external dso_local global [100 x ptr], align 16
@curr = external dso_local global ptr, align 8

; 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: mustprogress uwtable
define dso_local void @_Z3addii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %6 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #4
  store ptr %6, ptr %5, align 8, !tbaa !9
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds %struct.Node, ptr %8, i32 0, i32 0
  store i32 %7, ptr %9, align 8, !tbaa !11
  %10 = load ptr, ptr %5, align 8, !tbaa !9
  %11 = getelementptr inbounds %struct.Node, ptr %10, i32 0, i32 1
  store ptr null, ptr %11, align 8, !tbaa !13
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100 x ptr], ptr @head, i64 0, i64 %13
  %15 = load ptr, ptr %14, align 8, !tbaa !9
  %16 = icmp ne ptr %15, null
  br i1 %16, label %26, label %17

17:                                               ; preds = %2
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [100 x ptr], ptr @head, i64 0, i64 %20
  store ptr %18, ptr %21, align 8, !tbaa !9
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [100 x ptr], ptr @head, i64 0, i64 %23
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  store ptr %25, ptr @curr, align 8, !tbaa !9
  br label %44

26:                                               ; preds = %2
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [100 x ptr], ptr @head, i64 0, i64 %28
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  store ptr %30, ptr @curr, align 8, !tbaa !9
  br label %31

31:                                               ; preds = %36, %26
  %32 = load ptr, ptr @curr, align 8, !tbaa !9
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 1
  %34 = load ptr, ptr %33, align 8, !tbaa !13
  %35 = icmp ne ptr %34, null
  br i1 %35, label %36, label %40

36:                                               ; preds = %31
  %37 = load ptr, ptr @curr, align 8, !tbaa !9
  %38 = getelementptr inbounds %struct.Node, ptr %37, i32 0, i32 1
  %39 = load ptr, ptr %38, align 8, !tbaa !13
  store ptr %39, ptr @curr, align 8, !tbaa !9
  br label %31, !llvm.loop !14

40:                                               ; preds = %31
  %41 = load ptr, ptr %5, align 8, !tbaa !9
  %42 = load ptr, ptr @curr, align 8, !tbaa !9
  %43 = getelementptr inbounds %struct.Node, ptr %42, i32 0, i32 1
  store ptr %41, ptr %43, align 8, !tbaa !13
  br label %44

44:                                               ; preds = %40, %17
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret void
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { nobuiltin 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 #3 = { nounwind }
attributes #4 = { builtin 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS4Node", !6, i64 0, !10, i64 8}
!13 = !{!12, !10, 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"

@head = external dso_local local_unnamed_addr global [100 x ptr], align 16
@curr = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3addii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #2
  store i32 %0, ptr %3, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr null, ptr %4, align 8, !tbaa !11
  %5 = sext i32 %1 to i64
  %6 = getelementptr inbounds [100 x ptr], ptr @head, i64 0, i64 %5
  %7 = load ptr, ptr %6, align 8, !tbaa !12
  %.not = icmp eq ptr %7, null
  br i1 %.not, label %8, label %.preheader

8:                                                ; preds = %2
  store ptr %3, ptr %6, align 8, !tbaa !12
  br label %13

.preheader:                                       ; preds = %2, %.preheader
  %storemerge = phi ptr [ %10, %.preheader ], [ %7, %2 ]
  %9 = getelementptr inbounds i8, ptr %storemerge, i64 8
  %10 = load ptr, ptr %9, align 8, !tbaa !11
  %.not9 = icmp eq ptr %10, null
  br i1 %.not9, label %11, label %.preheader, !llvm.loop !13

11:                                               ; preds = %.preheader
  %12 = getelementptr inbounds i8, ptr %storemerge, i64 8
  store ptr %storemerge, ptr @curr, align 8, !tbaa !12
  br label %13

13:                                               ; preds = %11, %8
  %.sink = phi ptr [ %12, %11 ], [ @curr, %8 ]
  store ptr %3, ptr %.sink, align 8, !tbaa !12
  ret void
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { nobuiltin 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 = { builtin 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, !7, i64 0}
!6 = !{!"_ZTS4Node", !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 = !{!6, !10, i64 8}
!12 = !{!10, !10, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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