; LLVM IR from upupming/algorithm :: AdvancedLevel_C++/1155. Heap Paths (30).ll (Z3dfsi)

; 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.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@v = external dso_local global %"class.std::vector", align 8
@a = external dso_local global [1009 x i32], align 16
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsi(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = mul nsw i32 %4, 2
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %7 = icmp sgt i32 %5, %6
  br i1 %7, label %8, label %46

8:                                                ; preds = %1
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = mul nsw i32 %9, 2
  %11 = add nsw i32 %10, 1
  %12 = load i32, ptr @n, align 4, !tbaa !5
  %13 = icmp sgt i32 %11, %12
  br i1 %13, label %14, label %46

14:                                               ; preds = %8
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = load i32, ptr @n, align 4, !tbaa !5
  %17 = icmp sle i32 %15, %16
  br i1 %17, label %18, label %45

18:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %41, %18
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #4
  %23 = icmp ult i64 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %44

25:                                               ; preds = %19
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @v, i64 noundef %27) #4
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #4
  %33 = sub i64 %32, 1
  %34 = icmp ne i64 %31, %33
  br i1 %34, label %35, label %36

35:                                               ; preds = %25
  br label %37

36:                                               ; preds = %25
  br label %37

37:                                               ; preds = %36, %35
  %38 = phi ptr [ @.str.2, %35 ], [ @.str.3, %36 ]
  %39 = getelementptr inbounds [2 x i8], ptr %38, i64 0, i64 0
  %40 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %29, ptr noundef %39)
  br label %41

41:                                               ; preds = %37
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %3, align 4, !tbaa !5
  br label %19, !llvm.loop !9

44:                                               ; preds = %24
  br label %45

45:                                               ; preds = %44, %14
  br label %61

46:                                               ; preds = %8, %1
  %47 = load i32, ptr %2, align 4, !tbaa !5
  %48 = mul nsw i32 %47, 2
  %49 = add nsw i32 %48, 1
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [1009 x i32], ptr @a, i64 0, i64 %50
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) @v, ptr noundef nonnull align 4 dereferenceable(4) %51)
  %52 = load i32, ptr %2, align 4, !tbaa !5
  %53 = mul nsw i32 %52, 2
  %54 = add nsw i32 %53, 1
  call void @_Z3dfsi(i32 noundef %54)
  call void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #4
  %55 = load i32, ptr %2, align 4, !tbaa !5
  %56 = mul nsw i32 %55, 2
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds [1009 x i32], ptr @a, i64 0, i64 %57
  call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) @v, ptr noundef nonnull align 4 dereferenceable(4) %58)
  %59 = load i32, ptr %2, align 4, !tbaa !5
  %60 = mul nsw i32 %59, 2
  call void @_Z3dfsi(i32 noundef %60)
  call void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #4
  br label %61

61:                                               ; preds = %46, %45
  ret void
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 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 void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) #2 align 2

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress 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 #3 = { "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 #4 = { 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.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl" = type { %"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<int, std::allocator<int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@v = external dso_local global %"class.std::vector", align 8
@a = external dso_local global [1009 x i32], align 16
@n = external dso_local local_unnamed_addr global i32, align 4
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3dfsi(i32 noundef %0) local_unnamed_addr #0 {
  %2 = shl nsw i32 %0, 1
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %4 = icmp sgt i32 %2, %3
  br i1 %4, label %5, label %14

5:                                                ; preds = %1
  %.not = icmp slt i32 %3, %0
  br i1 %.not, label %common.ret18, label %.preheader

.preheader:                                       ; preds = %5
  %6 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #3
  %.not16 = icmp eq i64 %6, 0
  br i1 %.not16, label %common.ret18, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.preheader ]
  %7 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @v, i64 noundef %indvars.iv) #3
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #3
  %10 = add i64 %9, -1
  %.not14 = icmp eq i64 %10, %indvars.iv
  %.str.2..str.3 = select i1 %.not14, ptr @.str.3, ptr @.str.2
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %8, ptr noundef nonnull %.str.2..str.3)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #3
  %13 = icmp ugt i64 %12, %indvars.iv.next
  br i1 %13, label %.lr.ph, label %common.ret18, !llvm.loop !9

common.ret18:                                     ; preds = %5, %.preheader, %.lr.ph, %14
  ret void

14:                                               ; preds = %1
  %15 = or disjoint i32 %2, 1
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [1009 x i32], ptr @a, i64 0, i64 %16
  tail call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) @v, ptr noundef nonnull align 4 dereferenceable(4) %17)
  tail call void @_Z3dfsi(i32 noundef %15)
  tail call void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #3
  %18 = sext i32 %2 to i64
  %19 = getelementptr inbounds [1009 x i32], ptr @a, i64 0, i64 %18
  tail call void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24) @v, ptr noundef nonnull align 4 dereferenceable(4) %19)
  tail call void @_Z3dfsi(i32 noundef %2)
  tail call void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24) @v) #3
  br label %common.ret18
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE9push_backERKi(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorIiSaIiEE8pop_backEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #1 align 2

attributes #0 = { 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 #1 = { mustprogress 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 = { 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" }
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"}


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