; LLVM IR from bartobri/data-structures-c :: symbol-table/hash-table-separate-chaining-unordered (st)

; 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.STnode = type { ptr, ptr }
%struct.anon = type { i32, i32 }

@z = external hidden 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: nounwind uwtable
define dso_local ptr @STdeleteR(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = 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 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load ptr, ptr @z, align 8, !tbaa !5
  %12 = icmp eq ptr %10, %11
  br i1 %12, label %13, label %15

13:                                               ; preds = %2
  %14 = load ptr, ptr @z, align 8, !tbaa !5
  store ptr %14, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %43

15:                                               ; preds = %2
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.STnode, ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.anon, ptr %18, i32 0, i32 0
  %20 = load i32, ptr %19, align 4, !tbaa !11
  store i32 %20, ptr %7, align 4, !tbaa !14
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.anon, ptr %21, i32 0, i32 0
  %23 = load i32, ptr %22, align 4, !tbaa !11
  store i32 %23, ptr %8, align 4, !tbaa !14
  %24 = load i32, ptr %8, align 4, !tbaa !14
  %25 = load i32, ptr %7, align 4, !tbaa !14
  %26 = icmp eq i32 %24, %25
  br i1 %26, label %27, label %33

27:                                               ; preds = %15
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %28, ptr %6, align 8, !tbaa !5
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.STnode, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !15
  store ptr %31, ptr %4, align 8, !tbaa !5
  %32 = load ptr, ptr %6, align 8, !tbaa !5
  call void @free(ptr noundef %32) #3
  br label %41

33:                                               ; preds = %15
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.STnode, ptr %34, i32 0, i32 1
  %36 = load ptr, ptr %35, align 8, !tbaa !15
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = call ptr @STdeleteR(ptr noundef %36, ptr noundef %37)
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.STnode, ptr %39, i32 0, i32 1
  store ptr %38, ptr %40, align 8, !tbaa !15
  br label %41

41:                                               ; preds = %33, %27
  %42 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %42, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %43

43:                                               ; preds = %41, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %44 = load ptr, ptr %3, align 8
  ret ptr %44
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

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 "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, !6, i64 0}
!10 = !{!"STnode", !6, i64 0, !6, i64 8}
!11 = !{!12, !13, i64 0}
!12 = !{!"", !13, i64 0, !13, i64 4}
!13 = !{!"int", !7, i64 0}
!14 = !{!13, !13, i64 0}
!15 = !{!10, !6, i64 8}


; 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"

@z = external hidden local_unnamed_addr global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @STdeleteR(ptr noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @z, align 8, !tbaa !5
  %4 = icmp eq ptr %3, %0
  br i1 %4, label %common.ret15, label %5

5:                                                ; preds = %2
  %6 = load ptr, ptr %0, align 8, !tbaa !9
  %7 = load i32, ptr %6, align 4, !tbaa !11
  %8 = load i32, ptr %1, align 4, !tbaa !11
  %9 = icmp eq i32 %8, %7
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !14
  br i1 %9, label %12, label %13

12:                                               ; preds = %5
  tail call void @free(ptr noundef nonnull %0) #2
  br label %common.ret15

common.ret15:                                     ; preds = %12, %2, %13
  %common.ret15.op = phi ptr [ %0, %13 ], [ %3, %2 ], [ %11, %12 ]
  ret ptr %common.ret15.op

13:                                               ; preds = %5
  %14 = tail call ptr @STdeleteR(ptr noundef %11, ptr noundef nonnull %1)
  store ptr %14, ptr %10, align 8, !tbaa !14
  br label %common.ret15
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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, !6, i64 0}
!10 = !{!"STnode", !6, i64 0, !6, i64 8}
!11 = !{!12, !13, i64 0}
!12 = !{!"", !13, i64 0, !13, i64 4}
!13 = !{!"int", !7, i64 0}
!14 = !{!10, !6, i64 8}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass