; 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_stack = type { i32, i32, ptr, 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 void @gf_buffer_mark(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @gf_stack_dup(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.gf_stack, ptr %6, i32 0, i32 0
  %8 = load i32, ptr %7, align 8, !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 %54

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.gf_stack, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !9
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.gf_stack, ptr %15, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !12
  %18 = sub nsw i32 %17, 1
  %19 = icmp sge i32 %14, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %11
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %54

21:                                               ; preds = %11
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.gf_stack, ptr %22, i32 0, i32 3
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.gf_stack, ptr %25, i32 0, i32 0
  %27 = load i32, ptr %26, align 8, !tbaa !9
  %28 = sub nsw i32 %27, 1
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds ptr, ptr %24, i64 %29
  %31 = load ptr, ptr %30, align 8, !tbaa !5
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.gf_stack, ptr %32, i32 0, i32 3
  %34 = load ptr, ptr %33, align 8, !tbaa !13
  %35 = load ptr, ptr %3, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.gf_stack, ptr %35, i32 0, i32 0
  %37 = load i32, ptr %36, align 8, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds ptr, ptr %34, i64 %38
  store ptr %31, ptr %39, align 8, !tbaa !5
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.gf_stack, ptr %40, i32 0, i32 3
  %42 = load ptr, ptr %41, align 8, !tbaa !13
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.gf_stack, ptr %43, i32 0, i32 0
  %45 = load i32, ptr %44, align 8, !tbaa !9
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds ptr, ptr %42, i64 %46
  %48 = load ptr, ptr %47, align 8, !tbaa !5
  store ptr %48, ptr %4, align 8, !tbaa !5
  %49 = load ptr, ptr %4, align 8, !tbaa !5
  call void @gf_buffer_mark(ptr noundef %49)
  %50 = load ptr, ptr %3, align 8, !tbaa !5
  %51 = getelementptr inbounds %struct.gf_stack, ptr %50, i32 0, i32 0
  %52 = load i32, ptr %51, align 8, !tbaa !9
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %51, align 8, !tbaa !9
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %54

54:                                               ; preds = %21, %20, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %55 = load i32, ptr %2, align 4
  ret i32 %55
}

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 0}
!10 = !{!"gf_stack", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!10, !6, 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 void @gf_buffer_mark(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @gf_stack_dup(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr %0, align 8, !tbaa !5
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %20, label %4

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !11
  %7 = add nsw i32 %6, -1
  %.not = icmp slt i32 %2, %7
  br i1 %.not, label %8, label %20

8:                                                ; preds = %4
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load ptr, ptr %9, align 8, !tbaa !12
  %11 = sext i32 %2 to i64
  %12 = getelementptr ptr, ptr %10, i64 %11
  %13 = getelementptr i8, ptr %12, i64 -8
  %14 = load ptr, ptr %13, align 8, !tbaa !13
  store ptr %14, ptr %12, align 8, !tbaa !13
  %15 = load ptr, ptr %9, align 8, !tbaa !12
  %16 = getelementptr inbounds ptr, ptr %15, i64 %11
  %17 = load ptr, ptr %16, align 8, !tbaa !13
  tail call void @gf_buffer_mark(ptr noundef %17)
  %18 = load i32, ptr %0, align 8, !tbaa !5
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %0, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %4, %1, %8
  %.0 = phi i32 [ 0, %8 ], [ 1, %1 ], [ 1, %4 ]
  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 0}
!6 = !{!"gf_stack", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 16}
!13 = !{!10, !10, i64 0}


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