; LLVM IR from Skyness60/C-Garbage-Collector :: src (gc_debug)

; 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.s_garbage_c = type { ptr, i64, i64, i8 }

@.str = external hidden unnamed_addr constant [33 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [34 x i8], align 1

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

7:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %41

8:                                                ; preds = %1
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.s_garbage_c, ptr %10, i32 0, i32 2
  %12 = load i64, ptr %11, align 8, !tbaa !11
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %12)
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.s_garbage_c, ptr %14, i32 0, i32 1
  %16 = load i64, ptr %15, align 8, !tbaa !14
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %16)
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.s_garbage_c, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !11
  %21 = mul i64 %20, 8
  %22 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i64 noundef %21)
  br label %23

23:                                               ; preds = %30, %8
  %24 = load i64, ptr %3, align 8, !tbaa !9
  %25 = add i64 %24, 1
  store i64 %25, ptr %3, align 8, !tbaa !9
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.s_garbage_c, ptr %26, i32 0, i32 2
  %28 = load i64, ptr %27, align 8, !tbaa !11
  %29 = icmp ult i64 %25, %28
  br i1 %29, label %30, label %39

30:                                               ; preds = %23
  %31 = load i64, ptr %3, align 8, !tbaa !9
  %32 = load ptr, ptr %2, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.s_garbage_c, ptr %32, i32 0, i32 0
  %34 = load ptr, ptr %33, align 8, !tbaa !15
  %35 = load i64, ptr %3, align 8, !tbaa !9
  %36 = getelementptr inbounds ptr, ptr %34, i64 %35
  %37 = load ptr, ptr %36, align 8, !tbaa !5
  %38 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, i64 noundef %31, ptr noundef %37)
  br label %23, !llvm.loop !16

39:                                               ; preds = %23
  %40 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  store i32 0, ptr %4, align 4
  br label %41

41:                                               ; preds = %39, %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  %42 = load i32, ptr %4, align 4
  switch i32 %42, label %44 [
    i32 0, label %43
    i32 1, label %43
  ]

43:                                               ; preds = %41, %41
  ret void

44:                                               ; preds = %41
  unreachable
}

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

declare i32 @printf(ptr 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 = { "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 }

!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, !10, i64 16}
!12 = !{!"s_garbage_c", !6, i64 0, !10, i64 8, !10, i64 16, !13, i64 24}
!13 = !{!"_Bool", !7, i64 0}
!14 = !{!12, !10, i64 8}
!15 = !{!12, !6, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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"

@.str = external hidden unnamed_addr constant [33 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [33 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [17 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [34 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @debug_gc(ptr noundef readonly %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %24, label %3

3:                                                ; preds = %1
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %6)
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load i64, ptr %8, align 8, !tbaa !12
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %9)
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = shl i64 %11, 3
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i64 noundef %12)
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %.not = icmp eq i64 %14, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3, %.lr.ph
  %15 = phi i64 [ %20, %.lr.ph ], [ 0, %3 ]
  %16 = load ptr, ptr %0, align 8, !tbaa !13
  %17 = getelementptr inbounds ptr, ptr %16, i64 %15
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, i64 noundef %15, ptr noundef %18)
  %20 = add nuw i64 %15, 1
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = icmp ult i64 %20, %21
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !15

._crit_edge:                                      ; preds = %.lr.ph, %3
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  br label %24

24:                                               ; preds = %1, %._crit_edge
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { nofree nounwind "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 16}
!6 = !{!"s_garbage_c", !7, i64 0, !10, i64 8, !10, i64 16, !11, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"_Bool", !8, i64 0}
!12 = !{!6, !10, i64 8}
!13 = !{!6, !7, i64 0}
!14 = !{!7, !7, i64 0}
!15 = distinct !{!15, !16}
!16 = !{!"llvm.loop.mustprogress"}


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