; LLVM IR from attractivechaos/klib :: kurl (kurl_dopen)

; 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.kurl_t = type { ptr, ptr, ptr, i64, i32, i32, i32, i32, i32, i32, ptr }

; Function Attrs: nounwind uwtable
declare dso_local i32 @kurl_close(ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(0,1)
declare noalias ptr @calloc(i64 noundef, i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @fill_buffer(ptr noundef) #0

; Function Attrs: nounwind uwtable
declare hidden i32 @prepare(ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local ptr @kurl_dopen(i32 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %6 = call noalias ptr @calloc(i64 noundef 1, i64 noundef 64) #4
  store ptr %6, ptr %4, align 8, !tbaa !9
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !9
  %9 = getelementptr inbounds %struct.kurl_t, ptr %8, i32 0, i32 4
  store i32 %7, ptr %9, align 8, !tbaa !11
  %10 = load ptr, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds %struct.kurl_t, ptr %10, i32 0, i32 5
  store i32 32768, ptr %11, align 4, !tbaa !14
  %12 = load ptr, ptr %4, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.kurl_t, ptr %12, i32 0, i32 5
  %14 = load i32, ptr %13, align 4, !tbaa !14
  %15 = sext i32 %14 to i64
  %16 = call noalias ptr @calloc(i64 noundef %15, i64 noundef 1) #4
  %17 = load ptr, ptr %4, align 8, !tbaa !9
  %18 = getelementptr inbounds %struct.kurl_t, ptr %17, i32 0, i32 2
  store ptr %16, ptr %18, align 8, !tbaa !15
  %19 = load ptr, ptr %4, align 8, !tbaa !9
  %20 = call i32 @prepare(ptr noundef %19, i32 noundef 0)
  %21 = icmp slt i32 %20, 0
  br i1 %21, label %26, label %22

22:                                               ; preds = %1
  %23 = load ptr, ptr %4, align 8, !tbaa !9
  %24 = call i32 @fill_buffer(ptr noundef %23)
  %25 = icmp sle i32 %24, 0
  br i1 %25, label %26, label %29

26:                                               ; preds = %22, %1
  %27 = load ptr, ptr %4, align 8, !tbaa !9
  %28 = call i32 @kurl_close(ptr noundef %27)
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

29:                                               ; preds = %22
  %30 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %30, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

31:                                               ; preds = %29, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %32 = load ptr, ptr %2, align 8
  ret ptr %32
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind allocsize(0,1) "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 = { nounwind allocsize(0,1) }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"kurl_t", !10, i64 0, !10, i64 8, !10, i64 16, !13, i64 24, !6, i64 32, !6, i64 36, !6, i64 40, !6, i64 44, !6, i64 48, !6, i64 52, !10, i64 56}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !6, i64 36}
!15 = !{!12, !10, i64 16}


; 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 @kurl_close(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress 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

; Function Attrs: nounwind uwtable
declare hidden i32 @fill_buffer(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @prepare(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @kurl_dopen(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(64) ptr @calloc(i64 noundef 1, i64 noundef 64) #2
  %3 = getelementptr inbounds i8, ptr %2, i64 32
  store i32 %0, ptr %3, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %2, i64 36
  store i32 32768, ptr %4, align 4, !tbaa !12
  %5 = tail call noalias dereferenceable_or_null(32768) ptr @calloc(i64 noundef 32768, i64 noundef 1) #2
  %6 = getelementptr inbounds i8, ptr %2, i64 16
  store ptr %5, ptr %6, align 8, !tbaa !13
  %7 = tail call i32 @prepare(ptr noundef %2, i32 noundef 0)
  %8 = icmp slt i32 %7, 0
  br i1 %8, label %12, label %9

9:                                                ; preds = %1
  %10 = tail call i32 @fill_buffer(ptr noundef nonnull %2)
  %11 = icmp slt i32 %10, 1
  br i1 %11, label %12, label %14

12:                                               ; preds = %9, %1
  %13 = tail call i32 @kurl_close(ptr noundef nonnull %2)
  br label %14

14:                                               ; preds = %9, %12
  %.0 = phi ptr [ null, %12 ], [ %2, %9 ]
  ret ptr %.0
}

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 nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(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 allocsize(0,1) }

!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, !11, i64 32}
!6 = !{!"kurl_t", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24, !11, i64 32, !11, i64 36, !11, i64 40, !11, i64 44, !11, i64 48, !11, i64 52, !7, i64 56}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !11, i64 36}
!13 = !{!6, !7, i64 16}


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