; LLVM IR from brpapa/algorithms :: solutions/uri/1322.ll (Z11ehAdjacenteii)

; 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 }

@grafo = external dso_local global [200000 x %"class.std::vector"], align 16
@grau = external dso_local global [200000 x i32], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11ehAdjacenteii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %28, %2
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [200000 x i32], ptr @grau, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = icmp slt i32 %9, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %8
  store i32 2, ptr %7, align 4
  br label %31

16:                                               ; preds = %8
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @grafo, i64 0, i64 %19
  %21 = load i32, ptr %6, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %20, i64 noundef %22) #2
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = icmp eq i32 %17, %24
  br i1 %25, label %26, label %27

26:                                               ; preds = %16
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %31

27:                                               ; preds = %16
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %6, align 4, !tbaa !5
  br label %8, !llvm.loop !9

31:                                               ; preds = %26, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %32 = load i32, ptr %7, align 4
  switch i32 %32, label %36 [
    i32 2, label %33
    i32 1, label %34
  ]

33:                                               ; preds = %31
  store i1 false, ptr %3, align 1
  br label %34

34:                                               ; preds = %33, %31
  %35 = load i1, ptr %3, align 1
  ret i1 %35

36:                                               ; preds = %31
  unreachable
}

; 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) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 }

@grafo = external dso_local global [200000 x %"class.std::vector"], align 16
@grau = external dso_local local_unnamed_addr global [200000 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11ehAdjacenteii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [200000 x %"class.std::vector"], ptr @grafo, i64 0, i64 %3
  %5 = getelementptr inbounds [200000 x i32], ptr @grau, i64 0, i64 %3
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not9 = icmp sgt i32 %6, 0
  br i1 %.not9, label %.lr.ph, label %._crit_edge

7:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %.not = icmp slt i64 %indvars.iv.next, %9
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

.lr.ph:                                           ; preds = %2, %7
  %indvars.iv = phi i64 [ %indvars.iv.next, %7 ], [ 0, %2 ]
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %4, i64 noundef %indvars.iv) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp eq i32 %11, %1
  br i1 %12, label %._crit_edge, label %7

._crit_edge:                                      ; preds = %7, %.lr.ph, %2
  %.not.lcssa = phi i1 [ false, %2 ], [ %12, %.lr.ph ], [ %12, %7 ]
  ret i1 %.not.lcssa
}

; 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 #0 align 2

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" }
attributes #1 = { 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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass