; LLVM IR from PaulBatchelor/sndkit :: graforge (graforge)

; 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.gf_bufferpool = type { ptr, i32, i32, i32, i32 }
%struct.gf_buffer = type { i32, i32, 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 @gf_bufferpool_unholdu(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @gf_bufferpool_unholdu_all(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.gf_bufferpool, ptr %6, i32 0, i32 4
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %1
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %31

11:                                               ; preds = %1
  store i32 0, ptr %4, align 4, !tbaa !12
  br label %12

12:                                               ; preds = %27, %11
  %13 = load i32, ptr %4, align 4, !tbaa !12
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.gf_bufferpool, ptr %14, i32 0, i32 1
  %16 = load i32, ptr %15, align 8, !tbaa !13
  %17 = icmp slt i32 %13, %16
  br i1 %17, label %18, label %30

18:                                               ; preds = %12
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.gf_bufferpool, ptr %20, i32 0, i32 0
  %22 = load ptr, ptr %21, align 8, !tbaa !14
  %23 = load i32, ptr %4, align 4, !tbaa !12
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds %struct.gf_buffer, ptr %22, i64 %24
  %26 = call i32 @gf_bufferpool_unholdu(ptr noundef %19, ptr noundef %25)
  br label %27

27:                                               ; preds = %18
  %28 = load i32, ptr %4, align 4, !tbaa !12
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !12
  br label %12, !llvm.loop !15

30:                                               ; preds = %12
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %31

31:                                               ; preds = %30, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %32 = load i32, ptr %2, align 4
  ret i32 %32
}

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 20}
!10 = !{!"gf_bufferpool", !6, i64 0, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 8}
!14 = !{!10, !6, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"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"

%struct.gf_buffer = type { i32, i32, ptr }

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

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @gf_bufferpool_unholdu_all(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 20
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !11
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.preheader ]
  %8 = load ptr, ptr %0, align 8, !tbaa !12
  %9 = getelementptr inbounds %struct.gf_buffer, ptr %8, i64 %indvars.iv
  %10 = tail call i32 @gf_bufferpool_unholdu(ptr noundef nonnull %0, ptr noundef %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = load i32, ptr %5, align 8, !tbaa !11
  %12 = sext i32 %11 to i64
  %13 = icmp slt i64 %indvars.iv.next, %12
  br i1 %13, label %.lr.ph, label %.loopexit, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %1
  %.07 = phi i32 [ 1, %1 ], [ 0, %.preheader ], [ 0, %.lr.ph ]
  ret i32 %.07
}

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 20}
!6 = !{!"gf_bufferpool", !7, i64 0, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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