; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/348 Division 1/Problem B/B.ll (Z3addRii)

; 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"

@n = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3addRii(ptr noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load i32, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = add nsw i32 %7, %5
  store i32 %8, ptr %6, align 4, !tbaa !9
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i32, ptr %9, align 4, !tbaa !9
  %11 = icmp slt i32 %10, 0
  br i1 %11, label %12, label %17

12:                                               ; preds = %2
  %13 = load i32, ptr @n, align 4, !tbaa !9
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i32, ptr %14, align 4, !tbaa !9
  %16 = add nsw i32 %15, %13
  store i32 %16, ptr %14, align 4, !tbaa !9
  br label %28

17:                                               ; preds = %2
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i32, ptr %18, align 4, !tbaa !9
  %20 = load i32, ptr @n, align 4, !tbaa !9
  %21 = icmp sge i32 %19, %20
  br i1 %21, label %22, label %27

22:                                               ; preds = %17
  %23 = load i32, ptr @n, align 4, !tbaa !9
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = sub nsw i32 %25, %23
  store i32 %26, ptr %24, align 4, !tbaa !9
  br label %27

27:                                               ; preds = %22, %17
  br label %28

28:                                               ; preds = %27, %12
  ret void
}

attributes #0 = { 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" }

!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++ 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"

@n = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_Z3addRii(ptr nocapture noundef nonnull align 4 dereferenceable(4) %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 4, !tbaa !5
  %4 = add nsw i32 %3, %1
  store i32 %4, ptr %0, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 0
  %6 = load i32, ptr @n, align 4, !tbaa !5
  br i1 %5, label %7, label %9

7:                                                ; preds = %2
  %8 = add nsw i32 %6, %4
  br label %.sink.split

9:                                                ; preds = %2
  %.not = icmp slt i32 %4, %6
  br i1 %.not, label %12, label %10

10:                                               ; preds = %9
  %11 = sub nsw i32 %4, %6
  br label %.sink.split

.sink.split:                                      ; preds = %7, %10
  %.sink = phi i32 [ %11, %10 ], [ %8, %7 ]
  store i32 %.sink, ptr %0, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %.sink.split, %9
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass