; LLVM IR from NVIDIA/DALI :: qa/test_wrapper_post.ll (Unwind_Backtrace)

; 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"

@orig_Unwind_Backtrace = external dso_local global ptr, align 8
@unsafeness_depth = external hidden thread_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @_Unwind_Backtrace(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr @orig_Unwind_Backtrace, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %9, label %8

8:                                                ; preds = %2
  call void @unwind_init()
  br label %9

9:                                                ; preds = %8, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %10 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @unsafeness_depth)
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr %10, align 4, !tbaa !9
  %13 = load ptr, ptr @orig_Unwind_Backtrace, align 8, !tbaa !5
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = call i32 %13(ptr noundef %14, ptr noundef %15)
  store i32 %16, ptr %5, align 4, !tbaa !9
  %17 = call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @unsafeness_depth)
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr %17, align 4, !tbaa !9
  %20 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %20
}

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #2

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

; Function Attrs: nounwind uwtable
declare hidden void @unwind_init() #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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"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"

@orig_Unwind_Backtrace = external dso_local local_unnamed_addr global ptr, align 8
@unsafeness_depth = external hidden thread_local local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @_Unwind_Backtrace(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = load ptr, ptr @orig_Unwind_Backtrace, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %4, label %5

4:                                                ; preds = %2
  tail call void @unwind_init()
  %.pre = load ptr, ptr @orig_Unwind_Backtrace, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %4, %2
  %6 = phi ptr [ %.pre, %4 ], [ %3, %2 ]
  %7 = tail call align 4 ptr @llvm.threadlocal.address.p0(ptr align 4 @unsafeness_depth)
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %7, align 4, !tbaa !9
  %10 = tail call i32 %6(ptr noundef %0, ptr noundef %1) #2
  %11 = load i32, ptr %7, align 4, !tbaa !9
  %12 = add nsw i32 %11, -1
  store i32 %12, ptr %7, align 4, !tbaa !9
  ret i32 %10
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare nonnull ptr @llvm.threadlocal.address.p0(ptr nonnull) #1

; Function Attrs: nounwind uwtable
declare hidden void @unwind_init() local_unnamed_addr #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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,TailCallElimPass