; LLVM IR from kfv/leetcode :: src/1 (hash_table)

; 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, i32, ptr }

; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @hash_node_get(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  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 4, ptr %6) #3
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = call i32 @llvm.abs.i32(i32 %9, i1 true)
  %11 = srem i32 %10, 17
  store i32 %11, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds ptr, ptr %12, i64 %14
  %16 = load ptr, ptr %15, align 8, !tbaa !5
  store ptr %16, ptr %7, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %30, %2
  %18 = load ptr, ptr %7, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %20, label %34

20:                                               ; preds = %17
  %21 = load ptr, ptr %7, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.hash_node, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 8, !tbaa !11
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = icmp eq i32 %23, %24
  br i1 %25, label %26, label %30

26:                                               ; preds = %20
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.hash_node, ptr %27, i32 0, i32 1
  %29 = load i32, ptr %28, align 4, !tbaa !13
  store i32 %29, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %35

30:                                               ; preds = %20
  %31 = load ptr, ptr %7, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.hash_node, ptr %31, i32 0, i32 2
  %33 = load ptr, ptr %32, align 8, !tbaa !14
  store ptr %33, ptr %7, align 8, !tbaa !5
  br label %17, !llvm.loop !15

34:                                               ; preds = %17
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %35

35:                                               ; preds = %34, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %36 = load i32, ptr %3, align 4
  ret i32 %36
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"hash_node", !10, i64 0, !10, i64 4, !6, i64 8}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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 nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #0

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @hash_node_get(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = tail call i32 @llvm.abs.i32(i32 %1, i1 true)
  %4 = urem i32 %3, 17
  %5 = zext nneg i32 %4 to i64
  %6 = getelementptr inbounds ptr, ptr %0, i64 %5
  %.010 = load ptr, ptr %6, align 8, !tbaa !5
  %.not11 = icmp eq ptr %.010, null
  br i1 %.not11, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %2, %12
  %.012 = phi ptr [ %.0, %12 ], [ %.010, %2 ]
  %7 = load i32, ptr %.012, align 8, !tbaa !9
  %8 = icmp eq i32 %7, %1
  br i1 %8, label %9, label %12

9:                                                ; preds = %.lr.ph
  %10 = getelementptr inbounds i8, ptr %.012, i64 4
  %11 = load i32, ptr %10, align 4, !tbaa !12
  br label %.loopexit

12:                                               ; preds = %.lr.ph
  %13 = getelementptr inbounds i8, ptr %.012, i64 8
  %.0 = load ptr, ptr %13, align 8, !tbaa !5
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !13

.loopexit:                                        ; preds = %12, %2, %9
  %.08 = phi i32 [ %11, %9 ], [ -1, %2 ], [ -1, %12 ]
  ret i32 %.08
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"hash_node", !11, i64 0, !11, i64 4, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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