; LLVM IR from gzc/CLRS :: C18-B-Trees (btree)

; 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"

%class.Btree = type <{ ptr, i32, [4 x i8] }>

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca %class.Btree, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #3
  call void @_ZN5BtreeIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %11, %0
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 20
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %14

9:                                                ; preds = %5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %2, i32 noundef %10)
  br label %11

11:                                               ; preds = %9
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !9

14:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 19, ptr %4, align 4, !tbaa !5
  %15 = call noundef zeroext i1 @_ZN5BtreeIiE6removeERKi(ptr noundef nonnull align 8 dereferenceable(12) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @_ZNK5BtreeIiE9PrintTreeEi(ptr noundef nonnull align 8 dereferenceable(12) %2, i32 noundef 1)
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #3
  ret i32 0
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5BtreeIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(12)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) #2 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5BtreeIiE6removeERKi(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(4)) #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK5BtreeIiE9PrintTreeEi(ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) #2 align 2

attributes #0 = { mustprogress norecurse 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 = { mustprogress 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

%class.Btree = type <{ ptr, i32, [4 x i8] }>

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca %class.Btree, align 8
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #3
  call void @_ZN5BtreeIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(12) %1)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 1)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 2)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 3)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 4)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 5)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 6)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 7)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 8)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 9)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 10)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 11)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 12)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 13)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 14)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 15)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 16)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 17)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 18)
  call void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 19)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  store i32 19, ptr %2, align 4, !tbaa !5
  %3 = call noundef zeroext i1 @_ZN5BtreeIiE6removeERKi(ptr noundef nonnull align 8 dereferenceable(12) %1, ptr noundef nonnull align 4 dereferenceable(4) %2)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @_ZNK5BtreeIiE9PrintTreeEi(ptr noundef nonnull align 8 dereferenceable(12) %1, i32 noundef 1)
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #3
  ret i32 0
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5BtreeIiEC2Ev(ptr noundef nonnull align 8 dereferenceable(12)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN5BtreeIiE13B_tree_insertEi(ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) local_unnamed_addr #2 align 2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5BtreeIiE6removeERKi(ptr noundef nonnull align 8 dereferenceable(12), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNK5BtreeIiE9PrintTreeEi(ptr noundef nonnull align 8 dereferenceable(12), i32 noundef) local_unnamed_addr #2 align 2

attributes #0 = { mustprogress norecurse 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 willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass