; LLVM IR from sameerkavthekar/garbage-collector :: src (hashmap)

; 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_map = type { ptr, i32 }
%struct.hash_node = type { ptr, ptr, 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: nounwind uwtable
declare dso_local i32 @hash_function(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @search_node(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %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 ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = call i32 @hash_function(ptr noundef %9)
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.hash_map, ptr %11, i32 0, i32 1
  %13 = load i32, ptr %12, align 8, !tbaa !9
  %14 = sub nsw i32 %13, 1
  %15 = and i32 %10, %14
  store i32 %15, ptr %6, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.hash_map, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %6, align 4, !tbaa !12
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  store ptr %22, ptr %7, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %33, %2
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = icmp ne ptr %24, null
  br i1 %25, label %26, label %37

26:                                               ; preds = %23
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.hash_node, ptr %27, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !14
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = icmp eq ptr %29, %30
  br i1 %31, label %32, label %33

32:                                               ; preds = %26
  store i32 1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %38

33:                                               ; preds = %26
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.hash_node, ptr %34, i32 0, i32 2
  %36 = load ptr, ptr %35, align 8, !tbaa !16
  store ptr %36, ptr %7, align 8, !tbaa !5
  br label %23, !llvm.loop !17

37:                                               ; preds = %23
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %38

38:                                               ; preds = %37, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %39 = load i32, ptr %3, align 4
  ret i32 %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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, !11, i64 8}
!10 = !{!"hash_map", !6, i64 0, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 0}
!14 = !{!15, !6, i64 8}
!15 = !{!"hash_node", !6, i64 0, !6, i64 8, !6, i64 16}
!16 = !{!15, !6, i64 16}
!17 = distinct !{!17, !18}
!18 = !{!"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
declare dso_local i32 @hash_function(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @search_node(ptr nocapture noundef readonly %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 @hash_function(ptr noundef %1)
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = add nsw i32 %5, -1
  %7 = and i32 %6, %3
  %8 = load ptr, ptr %0, align 8, !tbaa !11
  %9 = sext i32 %7 to i64
  %10 = getelementptr inbounds ptr, ptr %8, i64 %9
  %.09 = load ptr, ptr %10, align 8, !tbaa !12
  %.not10 = icmp eq ptr %.09, null
  br i1 %.not10, label %._crit_edge, label %.lr.ph

11:                                               ; preds = %.lr.ph
  %12 = getelementptr inbounds i8, ptr %.011, i64 16
  %.0 = load ptr, ptr %12, align 8, !tbaa !12
  %.not = icmp eq ptr %.0, null
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

.lr.ph:                                           ; preds = %2, %11
  %.011 = phi ptr [ %.0, %11 ], [ %.09, %2 ]
  %13 = getelementptr inbounds i8, ptr %.011, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !15
  %15 = icmp eq ptr %14, %1
  br i1 %15, label %._crit_edge, label %11

._crit_edge:                                      ; preds = %.lr.ph, %11, %2
  %.08 = phi i32 [ 0, %2 ], [ 0, %11 ], [ 1, %.lr.ph ]
  ret i32 %.08
}

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" }

!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, !10, i64 8}
!6 = !{!"hash_map", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!16, !7, i64 8}
!16 = !{!"hash_node", !7, i64 0, !7, i64 8, !7, i64 16}


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