; LLVM IR from imteekay/algorithms :: competitive-programming/uri (short_attendance)

; 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"

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z15need_attendanceNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca double, align 8
  %6 = alloca double, align 8
  %7 = alloca double, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %9 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %10 = uitofp i64 %9 to double
  store double %10, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store double 0.000000e+00, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store double 0.000000e+00, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store double 0.000000e+00, ptr %7, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %39, %1
  %12 = load double, ptr %7, align 8, !tbaa !9
  %13 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %14 = uitofp i64 %13 to double
  %15 = fcmp olt double %12, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %42

17:                                               ; preds = %11
  %18 = load double, ptr %7, align 8, !tbaa !9
  %19 = fptoui double %18 to i64
  %20 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %19)
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = icmp eq i32 %22, 80
  br i1 %23, label %24, label %27

24:                                               ; preds = %17
  %25 = load double, ptr %5, align 8, !tbaa !9
  %26 = fadd double %25, 1.000000e+00
  store double %26, ptr %5, align 8, !tbaa !9
  br label %38

27:                                               ; preds = %17
  %28 = load double, ptr %7, align 8, !tbaa !9
  %29 = fptoui double %28 to i64
  %30 = call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %29)
  %31 = load i8, ptr %30, align 1, !tbaa !11
  %32 = sext i8 %31 to i32
  %33 = icmp eq i32 %32, 77
  br i1 %33, label %34, label %37

34:                                               ; preds = %27
  %35 = load double, ptr %6, align 8, !tbaa !9
  %36 = fadd double %35, 1.000000e+00
  store double %36, ptr %6, align 8, !tbaa !9
  br label %37

37:                                               ; preds = %34, %27
  br label %38

38:                                               ; preds = %37, %24
  br label %39

39:                                               ; preds = %38
  %40 = load double, ptr %7, align 8, !tbaa !9
  %41 = fadd double %40, 1.000000e+00
  store double %41, ptr %7, align 8, !tbaa !9
  br label %11, !llvm.loop !12

42:                                               ; preds = %16
  %43 = load double, ptr %6, align 8, !tbaa !9
  %44 = load double, ptr %4, align 8, !tbaa !9
  %45 = fsub double %44, %43
  store double %45, ptr %4, align 8, !tbaa !9
  %46 = load double, ptr %5, align 8, !tbaa !9
  %47 = load double, ptr %4, align 8, !tbaa !9
  %48 = fdiv double %46, %47
  %49 = fcmp oge double %48, 7.500000e-01
  br i1 %49, label %50, label %51

50:                                               ; preds = %42
  store i1 false, ptr %2, align 1
  store i32 1, ptr %8, align 4
  br label %52

51:                                               ; preds = %42
  store i1 true, ptr %2, align 1
  store i32 1, ptr %8, align 4
  br label %52

52:                                               ; preds = %51, %50
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %53 = load i1, ptr %2, align 1
  ret i1 %53
}

; 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 noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), 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

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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z15need_attendanceNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull %0) local_unnamed_addr #0 {
  %2 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #1
  %3 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #1
  %.not = icmp eq i64 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %20, %1
  %.012.lcssa = phi double [ 0.000000e+00, %1 ], [ %.113, %20 ]
  %.011.lcssa = phi double [ 0.000000e+00, %1 ], [ %.1, %20 ]
  %4 = uitofp i64 %2 to double
  %5 = fsub double %4, %.011.lcssa
  %6 = fdiv double %.012.lcssa, %5
  %7 = fcmp ult double %6, 7.500000e-01
  ret i1 %7

.lr.ph:                                           ; preds = %1, %20
  %.017 = phi double [ %21, %20 ], [ 0.000000e+00, %1 ]
  %.01116 = phi double [ %.1, %20 ], [ 0.000000e+00, %1 ]
  %.01215 = phi double [ %.113, %20 ], [ 0.000000e+00, %1 ]
  %8 = fptoui double %.017 to i64
  %9 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %8)
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = icmp eq i8 %10, 80
  br i1 %11, label %12, label %14

12:                                               ; preds = %.lr.ph
  %13 = fadd double %.01215, 1.000000e+00
  br label %20

14:                                               ; preds = %.lr.ph
  %15 = tail call noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %8)
  %16 = load i8, ptr %15, align 1, !tbaa !5
  %17 = icmp eq i8 %16, 77
  br i1 %17, label %18, label %20

18:                                               ; preds = %14
  %19 = fadd double %.01116, 1.000000e+00
  br label %20

20:                                               ; preds = %12, %18, %14
  %.113 = phi double [ %13, %12 ], [ %.01215, %18 ], [ %.01215, %14 ]
  %.1 = phi double [ %.01116, %12 ], [ %19, %18 ], [ %.01116, %14 ]
  %21 = fadd double %.017, 1.000000e+00
  %22 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #1
  %23 = uitofp i64 %22 to double
  %24 = fcmp olt double %21, %23
  br i1 %24, label %.lr.ph, label %._crit_edge, !llvm.loop !8
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef nonnull align 1 dereferenceable(1) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEixEm(ptr noundef nonnull align 8 dereferenceable(32), 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass