; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 01. Mathematics/cows.ll (Z4goodx)

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

@n = external dso_local global i64, align 8
@c = external dso_local global i64, align 8
@a = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z4goodx(i64 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef 0) #2
  %9 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %9, ptr %5, align 8, !tbaa !5
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = add nsw i64 %10, 1
  store i64 %11, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 1, ptr %6, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %37, %1
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = load i64, ptr @n, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  store i32 2, ptr %7, align 4
  br label %40

17:                                               ; preds = %12
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef %18) #2
  %20 = load i64, ptr %19, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = sub nsw i64 %20, %21
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = icmp sge i64 %22, %23
  br i1 %24, label %25, label %36

25:                                               ; preds = %17
  %26 = load i64, ptr %4, align 8, !tbaa !5
  %27 = add nsw i64 %26, 1
  store i64 %27, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = load i64, ptr @c, align 8, !tbaa !5
  %30 = icmp eq i64 %28, %29
  br i1 %30, label %31, label %32

31:                                               ; preds = %25
  store i1 true, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %40

32:                                               ; preds = %25
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef %33) #2
  %35 = load i64, ptr %34, align 8, !tbaa !5
  store i64 %35, ptr %5, align 8, !tbaa !5
  br label %36

36:                                               ; preds = %32, %17
  br label %37

37:                                               ; preds = %36
  %38 = load i64, ptr %6, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1
  store i64 %39, ptr %6, align 8, !tbaa !5
  br label %12, !llvm.loop !9

40:                                               ; preds = %31, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %41 = load i32, ptr %7, align 4
  switch i32 %41, label %43 [
    i32 2, label %42
  ]

42:                                               ; preds = %40
  store i1 false, ptr %2, align 1
  store i32 1, ptr %7, align 4
  br label %43

43:                                               ; preds = %42, %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %44 = load i1, ptr %2, align 1
  ret i1 %44
}

; 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 nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #0 align 2

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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long long", !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<long long, std::allocator<long long>>::_Vector_impl" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl" = type { %"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" }
%"struct.std::_Vector_base<long long, std::allocator<long long>>::_Vector_impl_data" = type { ptr, ptr, ptr }

@n = external dso_local local_unnamed_addr global i64, align 8
@c = external dso_local local_unnamed_addr global i64, align 8
@a = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z4goodx(i64 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef 0) #1
  %3 = load i64, ptr @n, align 8, !tbaa !5
  %.not1718 = icmp sgt i64 %3, 1
  br i1 %.not1718, label %.lr.ph.preheader, label %.critedge

.lr.ph.preheader:                                 ; preds = %1
  %4 = load i64, ptr %2, align 8, !tbaa !5
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %15
  %.01021 = phi i64 [ %16, %15 ], [ 1, %.lr.ph.preheader ]
  %.01120 = phi i64 [ %.1, %15 ], [ %4, %.lr.ph.preheader ]
  %.01219 = phi i64 [ %.113, %15 ], [ 1, %.lr.ph.preheader ]
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef %.01021) #1
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = sub nsw i64 %6, %.01120
  %.not = icmp slt i64 %7, %0
  br i1 %.not, label %15, label %8

8:                                                ; preds = %.lr.ph
  %9 = add nsw i64 %.01219, 1
  %10 = load i64, ptr @c, align 8, !tbaa !5
  %11 = icmp eq i64 %9, %10
  br i1 %11, label %.critedge, label %12

12:                                               ; preds = %8
  %13 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @a, i64 noundef %.01021) #1
  %14 = load i64, ptr %13, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %.lr.ph, %12
  %.113 = phi i64 [ %9, %12 ], [ %.01219, %.lr.ph ]
  %.1 = phi i64 [ %14, %12 ], [ %.01120, %.lr.ph ]
  %16 = add nuw nsw i64 %.01021, 1
  %17 = load i64, ptr @n, align 8, !tbaa !5
  %.not17 = icmp slt i64 %16, %17
  br i1 %.not17, label %.lr.ph, label %.critedge, !llvm.loop !9

.critedge:                                        ; preds = %8, %15, %1
  %.not17.lcssa = phi i1 [ false, %1 ], [ false, %15 ], [ true, %8 ]
  ret i1 %.not17.lcssa
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(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 = !{!"long long", !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,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass