; LLVM IR from attractivechaos/klib :: bgzf (bgzf_flush_try)

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @bgzf_flush_try(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.BGZF, ptr %6, i32 0, i32 3
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = sext i32 %8 to i64
  %10 = load i64, ptr %5, align 8, !tbaa !9
  %11 = add nsw i64 %9, %10
  %12 = icmp sgt i64 %11, 65536
  br i1 %12, label %13, label %16

13:                                               ; preds = %2
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = call i32 @bgzf_flush(ptr noundef %14)
  store i32 %15, ptr %3, align 4
  br label %17

16:                                               ; preds = %2
  store i32 -1, ptr %3, align 4
  br label %17

17:                                               ; preds = %16, %13
  %18 = load i32, ptr %3, align 4
  ret i32 %18
}

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, !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 = !{!"long", !7, i64 0}
!11 = !{!12, !13, i64 12}
!12 = !{!"", !13, i64 0, !13, i64 1, !13, i64 2, !13, i64 4, !13, i64 8, !13, i64 12, !10, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48}
!13 = !{!"int", !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 @bgzf_flush(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @bgzf_flush_try(ptr noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = sext i32 %4 to i64
  %6 = add nsw i64 %5, %1
  %7 = icmp sgt i64 %6, 65536
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = tail call i32 @bgzf_flush(ptr noundef nonnull %0)
  br label %10

10:                                               ; preds = %2, %8
  %.0 = phi i32 [ %9, %8 ], [ -1, %2 ]
  ret i32 %.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" }

!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 12}
!6 = !{!"", !7, i64 0, !7, i64 1, !7, i64 2, !7, i64 4, !7, i64 8, !7, i64 12, !10, i64 16, !11, i64 24, !11, i64 32, !11, i64 40, !11, i64 48}
!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,GlobalOptPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass