; LLVM IR from 0intro/wmii :: lib/libbio (binit)

; 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.Biobuf = type { i32, i32, i32, i32, i32, i32, i32, i64, i32, ptr, ptr, ptr, [8196 x i8] }

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

; Function Attrs: nounwind uwtable
define dso_local ptr @Bfdopen(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %8 = call noalias ptr @malloc(i64 noundef 8272) #4
  store ptr %8, ptr %6, align 8, !tbaa !9
  %9 = load ptr, ptr %6, align 8, !tbaa !9
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %23

12:                                               ; preds = %2
  %13 = load ptr, ptr %6, align 8, !tbaa !9
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct.Biobuf, ptr %16, i32 0, i32 12
  %18 = getelementptr inbounds [8196 x i8], ptr %17, i64 0, i64 0
  %19 = call i32 @Binits(ptr noundef %13, i32 noundef %14, i32 noundef %15, ptr noundef %18, i32 noundef 8196)
  %20 = load ptr, ptr %6, align 8, !tbaa !9
  %21 = getelementptr inbounds %struct.Biobuf, ptr %20, i32 0, i32 6
  store i32 3227993, ptr %21, align 8, !tbaa !11
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %22, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %23

23:                                               ; preds = %12, %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %24 = load ptr, ptr %3, align 8
  ret ptr %24
}

; 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)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind 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 = { nounwind 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 24}
!12 = !{!"Biobuf", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !6, i64 24, !13, i64 32, !6, i64 40, !10, i64 48, !10, i64 56, !10, i64 64, !7, i64 72}
!13 = !{!"long", !7, i64 0}


; 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 @Binits(ptr noundef, i32 noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @Bfdopen(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noalias dereferenceable_or_null(8272) ptr @malloc(i64 noundef 8272) #2
  %4 = icmp eq ptr %3, null
  br i1 %4, label %9, label %5

5:                                                ; preds = %2
  %6 = getelementptr inbounds i8, ptr %3, i64 72
  %7 = tail call i32 @Binits(ptr noundef nonnull %3, i32 noundef %0, i32 noundef %1, ptr noundef nonnull %6, i32 noundef 8196)
  %8 = getelementptr inbounds i8, ptr %3, i64 24
  store i32 3227993, ptr %8, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %2, %5
  ret ptr %3
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) 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) }

!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 24}
!6 = !{!"Biobuf", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !10, i64 32, !7, i64 40, !11, i64 48, !11, i64 56, !11, i64 64, !8, i64 72}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}


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