; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 01. Mathematics/ropes.ll (Z4goodd)

; 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
@k = external dso_local global i64, align 8
@arr = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z4goodd(double noundef %0) #0 {
  %2 = alloca double, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store double %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store i64 0, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %5

5:                                                ; preds = %21, %1
  %6 = load i64, ptr %4, align 8, !tbaa !9
  %7 = load i64, ptr @n, align 8, !tbaa !9
  %8 = icmp slt i64 %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %24

10:                                               ; preds = %5
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @arr, i64 noundef %11) #2
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = sitofp i64 %13 to double
  %15 = load double, ptr %2, align 8, !tbaa !5
  %16 = fdiv double %14, %15
  %17 = load i64, ptr %3, align 8, !tbaa !9
  %18 = sitofp i64 %17 to double
  %19 = fadd double %18, %16
  %20 = fptosi double %19 to i64
  store i64 %20, ptr %3, align 8, !tbaa !9
  br label %21

21:                                               ; preds = %10
  %22 = load i64, ptr %4, align 8, !tbaa !9
  %23 = add nsw i64 %22, 1
  store i64 %23, ptr %4, align 8, !tbaa !9
  br label %5, !llvm.loop !11

24:                                               ; preds = %9
  %25 = load i64, ptr %3, align 8, !tbaa !9
  %26 = load i64, ptr @k, align 8, !tbaa !9
  %27 = icmp sge i64 %25, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i1 %27
}

; 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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
@k = external dso_local local_unnamed_addr global i64, align 8
@arr = external dso_local global %"class.std::vector", align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z4goodd(double noundef %0) local_unnamed_addr #0 {
  %2 = load i64, ptr @n, align 8, !tbaa !5
  %3 = icmp sgt i64 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.05.lcssa = phi i64 [ 0, %1 ], [ %12, %.lr.ph ]
  %4 = load i64, ptr @k, align 8, !tbaa !5
  %5 = icmp sge i64 %.05.lcssa, %4
  ret i1 %5

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.07 = phi i64 [ %13, %.lr.ph ], [ 0, %1 ]
  %.056 = phi i64 [ %12, %.lr.ph ], [ 0, %1 ]
  %6 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIxSaIxEEixEm(ptr noundef nonnull align 8 dereferenceable(24) @arr, i64 noundef %.07) #1
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = sitofp i64 %7 to double
  %9 = fdiv double %8, %0
  %10 = sitofp i64 %.056 to double
  %11 = fadd double %9, %10
  %12 = fptosi double %11 to i64
  %13 = add nuw nsw i64 %.07, 1
  %14 = load i64, ptr @n, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9
}

; 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: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass