; LLVM IR from chronoxor/CppBenchmark :: source/benchmark/system.ll (ZN12CppBenchmark6System13CpuClockSpeedEv)

; 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::__cxx11::basic_regex" = type { i32, %"class.std::locale", %"class.std::shared_ptr" }
%"class.std::locale" = type { ptr }
%"class.std::shared_ptr" = type { %"class.std::__shared_ptr" }
%"class.std::__shared_ptr" = type { ptr, %"class.std::__shared_count" }
%"class.std::__shared_count" = type { ptr }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::basic_ifstream" = type { %"class.std::basic_istream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_filebuf" = type { %"class.std::basic_streambuf", %union.pthread_mutex_t, %"class.std::__basic_file", i32, %struct.__mbstate_t, %struct.__mbstate_t, %struct.__mbstate_t, ptr, i64, i8, i8, i8, i8, ptr, ptr, i8, ptr, ptr, i64, ptr, ptr }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%"class.std::__basic_file" = type <{ ptr, i8, [7 x i8] }>
%struct.__mbstate_t = type { i32, %union.anon.0 }
%union.anon.0 = type { i32 }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::__cxx11::match_results" = type { %"class.std::vector", %"class.__gnu_cxx::__normal_iterator" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@__dso_handle = external hidden global i8
@.str.1 = external hidden unnamed_addr constant [14 x i8], align 1
@_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 = external hidden global %"class.std::__cxx11::basic_regex", align 8
@_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 = external hidden global i64, align 8
@.str.4 = external hidden unnamed_addr constant [18 x i8], align 1

; Function Attrs: nounwind
declare i32 @__cxa_guard_acquire(ptr) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEEC2EPKcNSt15regex_constants18syntax_option_typeE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, i32 noundef) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: nounwind
declare i32 @__cxa_atexit(ptr, ptr, ptr) #0

; Function Attrs: nounwind
declare void @__cxa_guard_abort(ptr) #0

; Function Attrs: nounwind
declare void @__cxa_guard_release(ptr) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256), ptr noundef, i32 noundef) unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) #4

; Function Attrs: mustprogress uwtable
declare noundef zeroext i1 @_ZNKSt9basic_iosIcSt11char_traitsIcEEcvbEv(ptr noundef nonnull align 8 dereferenceable(264)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZSt11regex_matchISt11char_traitsIcESaIcESaINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS3_12basic_stringIcS1_S2_EEEEEEEcNS3_12regex_traitsIcEEEbRKNS9_IT2_T_T0_EERNS3_13match_resultsINSJ_14const_iteratorET1_EERKNS3_11basic_regexISG_T3_EENSt15regex_constants15match_flag_typeE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(17) ptr @_ZNKSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNKSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEEE3strEv(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(17)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN12CppBenchmark6System13CpuClockSpeedEv() #1 align 2 personality ptr @__gxx_personality_v0 {
  %1 = alloca i64, align 8
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = alloca %"class.std::basic_ifstream", align 8
  %6 = alloca %"class.std::__cxx11::match_results", align 8
  %7 = alloca %"class.std::__cxx11::basic_string", align 8
  %8 = alloca i32, align 4
  %9 = load atomic i8, ptr @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 acquire, align 8
  %10 = icmp eq i8 %9, 0
  br i1 %10, label %11, label %17, !prof !5

11:                                               ; preds = %0
  %12 = call i32 @__cxa_guard_acquire(ptr @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #0
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %17

14:                                               ; preds = %11
  invoke void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEEC2EPKcNSt15regex_constants18syntax_option_typeE(ptr noundef nonnull align 8 dereferenceable(32) @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, ptr noundef @.str.4, i32 noundef 16)
          to label %15 unwind label %40

15:                                               ; preds = %14
  %16 = call i32 @__cxa_atexit(ptr @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEED2Ev, ptr @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, ptr @__dso_handle) #0
  call void @__cxa_guard_release(ptr @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #0
  br label %17

17:                                               ; preds = %15, %11, %0
  call void @llvm.lifetime.start.p0(i64 32, ptr %4) #0
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #0
  call void @llvm.lifetime.start.p0(i64 520, ptr %5) #0
  invoke void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256) %5, ptr noundef @.str.1, i32 noundef 8)
          to label %18 unwind label %44

18:                                               ; preds = %17
  br label %19

19:                                               ; preds = %67, %18
  %20 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %5, ptr noundef nonnull align 8 dereferenceable(32) %4)
          to label %21 unwind label %48

21:                                               ; preds = %19
  %22 = load ptr, ptr %20, align 8, !tbaa !6
  %23 = getelementptr i8, ptr %22, i64 -24
  %24 = load i64, ptr %23, align 8
  %25 = getelementptr inbounds i8, ptr %20, i64 %24
  %26 = invoke noundef zeroext i1 @_ZNKSt9basic_iosIcSt11char_traitsIcEEcvbEv(ptr noundef nonnull align 8 dereferenceable(264) %25)
          to label %27 unwind label %48

27:                                               ; preds = %21
  br i1 %26, label %28, label %70

28:                                               ; preds = %27
  call void @llvm.lifetime.start.p0(i64 32, ptr %6) #0
  invoke void @_ZNSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6)
          to label %29 unwind label %52

29:                                               ; preds = %28
  %30 = invoke noundef zeroext i1 @_ZSt11regex_matchISt11char_traitsIcESaIcESaINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS3_12basic_stringIcS1_S2_EEEEEEEcNS3_12regex_traitsIcEEEbRKNS9_IT2_T_T0_EERNS3_13match_resultsINSJ_14const_iteratorET1_EERKNS3_11basic_regexISG_T3_EENSt15regex_constants15match_flag_typeE(ptr noundef nonnull align 8 dereferenceable(32) %4, ptr noundef nonnull align 8 dereferenceable(32) %6, ptr noundef nonnull align 8 dereferenceable(32) @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, i32 noundef 0)
          to label %31 unwind label %56

31:                                               ; preds = %29
  br i1 %30, label %32, label %64

32:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 32, ptr %7) #0
  %33 = invoke noundef nonnull align 8 dereferenceable(17) ptr @_ZNKSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %6, i64 noundef 2)
          to label %34 unwind label %60

34:                                               ; preds = %32
  invoke void @_ZNKSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEEE3strEv(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %7, ptr noundef nonnull align 8 dereferenceable(17) %33)
          to label %35 unwind label %60

35:                                               ; preds = %34
  %36 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %7) #0
  %37 = call double @atof(ptr noundef %36) #6
  %38 = fmul double %37, 1.000000e+06
  %39 = fptosi double %38 to i64
  store i64 %39, ptr %1, align 8
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %7) #0
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #0
  store i32 1, ptr %8, align 4
  br label %65

40:                                               ; preds = %14
  %41 = landingpad { ptr, i32 }
          cleanup
  %42 = extractvalue { ptr, i32 } %41, 0
  store ptr %42, ptr %2, align 8
  %43 = extractvalue { ptr, i32 } %41, 1
  store i32 %43, ptr %3, align 4
  call void @__cxa_guard_abort(ptr @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #0
  br label %75

44:                                               ; preds = %17
  %45 = landingpad { ptr, i32 }
          cleanup
  %46 = extractvalue { ptr, i32 } %45, 0
  store ptr %46, ptr %2, align 8
  %47 = extractvalue { ptr, i32 } %45, 1
  store i32 %47, ptr %3, align 4
  br label %74

48:                                               ; preds = %21, %19
  %49 = landingpad { ptr, i32 }
          cleanup
  %50 = extractvalue { ptr, i32 } %49, 0
  store ptr %50, ptr %2, align 8
  %51 = extractvalue { ptr, i32 } %49, 1
  store i32 %51, ptr %3, align 4
  br label %73

52:                                               ; preds = %28
  %53 = landingpad { ptr, i32 }
          cleanup
  %54 = extractvalue { ptr, i32 } %53, 0
  store ptr %54, ptr %2, align 8
  %55 = extractvalue { ptr, i32 } %53, 1
  store i32 %55, ptr %3, align 4
  br label %69

56:                                               ; preds = %29
  %57 = landingpad { ptr, i32 }
          cleanup
  %58 = extractvalue { ptr, i32 } %57, 0
  store ptr %58, ptr %2, align 8
  %59 = extractvalue { ptr, i32 } %57, 1
  store i32 %59, ptr %3, align 4
  br label %68

60:                                               ; preds = %34, %32
  %61 = landingpad { ptr, i32 }
          cleanup
  %62 = extractvalue { ptr, i32 } %61, 0
  store ptr %62, ptr %2, align 8
  %63 = extractvalue { ptr, i32 } %61, 1
  store i32 %63, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #0
  br label %68

64:                                               ; preds = %31
  store i32 0, ptr %8, align 4
  br label %65

65:                                               ; preds = %64, %35
  call void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #0
  call void @llvm.lifetime.end.p0(i64 32, ptr %6) #0
  %66 = load i32, ptr %8, align 4
  switch i32 %66, label %71 [
    i32 0, label %67
  ]

67:                                               ; preds = %65
  br label %19, !llvm.loop !9

68:                                               ; preds = %60, %56
  call void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #0
  br label %69

69:                                               ; preds = %68, %52
  call void @llvm.lifetime.end.p0(i64 32, ptr %6) #0
  br label %73

70:                                               ; preds = %27
  store i64 -1, ptr %1, align 8
  store i32 1, ptr %8, align 4
  br label %71

71:                                               ; preds = %70, %65
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %5) #0
  call void @llvm.lifetime.end.p0(i64 520, ptr %5) #0
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #0
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #0
  %72 = load i64, ptr %1, align 8
  ret i64 %72

73:                                               ; preds = %69, %48
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %5) #0
  br label %74

74:                                               ; preds = %73, %44
  call void @llvm.lifetime.end.p0(i64 520, ptr %5) #0
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #0
  call void @llvm.lifetime.end.p0(i64 32, ptr %4) #0
  br label %75

75:                                               ; preds = %74, %40
  %76 = load ptr, ptr %2, align 8
  %77 = load i32, ptr %3, align 4
  %78 = insertvalue { ptr, i32 } poison, ptr %76, 0
  %79 = insertvalue { ptr, i32 } %78, i32 %77, 1
  resume { ptr, i32 } %79
}

; Function Attrs: inlinehint mustprogress nounwind willreturn memory(read) uwtable
declare double @atof(ptr noundef nonnull) #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { nounwind }
attributes #1 = { 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 #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint 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 #5 = { inlinehint mustprogress nounwind willreturn memory(read) 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 #6 = { nounwind willreturn memory(read) }

!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 = !{!"branch_weights", i32 1, i32 1048575}
!6 = !{!7, !7, i64 0}
!7 = !{!"vtable pointer", !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::__cxx11::basic_regex" = type { i32, %"class.std::locale", %"class.std::shared_ptr" }
%"class.std::locale" = type { ptr }
%"class.std::shared_ptr" = type { %"class.std::__shared_ptr" }
%"class.std::__shared_ptr" = type { ptr, %"class.std::__shared_count" }
%"class.std::__shared_count" = type { ptr }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }
%"class.std::basic_ifstream" = type { %"class.std::basic_istream.base", %"class.std::basic_filebuf", %"class.std::basic_ios" }
%"class.std::basic_istream.base" = type { ptr, i64 }
%"class.std::basic_filebuf" = type { %"class.std::basic_streambuf", %union.pthread_mutex_t, %"class.std::__basic_file", i32, %struct.__mbstate_t, %struct.__mbstate_t, %struct.__mbstate_t, ptr, i64, i8, i8, i8, i8, ptr, ptr, i8, ptr, ptr, i64, ptr, ptr }
%"class.std::basic_streambuf" = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, %"class.std::locale" }
%union.pthread_mutex_t = type { %struct.__pthread_mutex_s }
%struct.__pthread_mutex_s = type { i32, i32, i32, i32, i32, i16, i16, %struct.__pthread_internal_list }
%struct.__pthread_internal_list = type { ptr, ptr }
%"class.std::__basic_file" = type <{ ptr, i8, [7 x i8] }>
%struct.__mbstate_t = type { i32, %union.anon.0 }
%union.anon.0 = type { i32 }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::__cxx11::match_results" = type { %"class.std::vector", %"class.__gnu_cxx::__normal_iterator" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>, std::allocator<std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<const char *, std::__cxx11::basic_string<char>>>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.__gnu_cxx::__normal_iterator" = type { ptr }

@__dso_handle = external hidden global i8
@.str.1 = external hidden unnamed_addr constant [14 x i8], align 1
@_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 = external hidden global %"class.std::__cxx11::basic_regex", align 8
@_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 = external hidden global i64, align 8
@.str.4 = external hidden unnamed_addr constant [18 x i8], align 1

; Function Attrs: nofree nounwind
declare i32 @__cxa_guard_acquire(ptr) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEEC2EPKcNSt15regex_constants18syntax_option_typeE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, i32 noundef) unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: nofree nounwind
declare i32 @__cxa_atexit(ptr, ptr, ptr) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare void @__cxa_guard_abort(ptr) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare void @__cxa_guard_release(ptr) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256), ptr noundef, i32 noundef) unnamed_addr #1 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
declare noundef zeroext i1 @_ZNKSt9basic_iosIcSt11char_traitsIcEEcvbEv(ptr noundef nonnull align 8 dereferenceable(264)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZSt11regex_matchISt11char_traitsIcESaIcESaINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS3_12basic_stringIcS1_S2_EEEEEEEcNS3_12regex_traitsIcEEEbRKNS9_IT2_T_T0_EERNS3_13match_resultsINSJ_14const_iteratorET1_EERKNS3_11basic_regexISG_T3_EENSt15regex_constants15match_flag_typeE(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32), i32 noundef) local_unnamed_addr #4

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(17) ptr @_ZNKSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEixEm(ptr noundef nonnull align 8 dereferenceable(32), i64 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256)) unnamed_addr #2 align 2

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNKSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEEE3strEv(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(17)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN12CppBenchmark6System13CpuClockSpeedEv() local_unnamed_addr #1 align 2 personality ptr @__gxx_personality_v0 {
  %1 = alloca %"class.std::__cxx11::basic_string", align 8
  %2 = alloca %"class.std::basic_ifstream", align 8
  %3 = alloca %"class.std::__cxx11::match_results", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = load atomic i8, ptr @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11 acquire, align 8
  %6 = icmp eq i8 %5, 0
  br i1 %6, label %7, label %12, !prof !5

7:                                                ; preds = %0
  %8 = tail call i32 @__cxa_guard_acquire(ptr nonnull @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #6
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %12, label %9

9:                                                ; preds = %7
  invoke void @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEEC2EPKcNSt15regex_constants18syntax_option_typeE(ptr noundef nonnull align 8 dereferenceable(32) @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, ptr noundef nonnull @.str.4, i32 noundef 16)
          to label %10 unwind label %31

10:                                               ; preds = %9
  %11 = tail call i32 @__cxa_atexit(ptr nonnull @_ZNSt7__cxx1111basic_regexIcNS_12regex_traitsIcEEED2Ev, ptr nonnull @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, ptr nonnull @__dso_handle) #6
  tail call void @__cxa_guard_release(ptr nonnull @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #6
  br label %12

12:                                               ; preds = %10, %7, %0
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %1) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  call void @llvm.lifetime.start.p0(i64 520, ptr nonnull %2) #6
  invoke void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEEC1EPKcSt13_Ios_Openmode(ptr noundef nonnull align 8 dereferenceable(256) %2, ptr noundef nonnull @.str.1, i32 noundef 8)
          to label %.preheader unwind label %33

.preheader:                                       ; preds = %12, %41
  %13 = invoke noundef nonnull align 8 dereferenceable(16) ptr @_ZSt7getlineIcSt11char_traitsIcESaIcEERSt13basic_istreamIT_T0_ES7_RNSt7__cxx1112basic_stringIS4_S5_T1_EE(ptr noundef nonnull align 8 dereferenceable(16) %2, ptr noundef nonnull align 8 dereferenceable(32) %1)
          to label %14 unwind label %35

14:                                               ; preds = %.preheader
  %15 = load ptr, ptr %13, align 8, !tbaa !6
  %16 = getelementptr i8, ptr %15, i64 -24
  %17 = load i64, ptr %16, align 8
  %18 = getelementptr inbounds i8, ptr %13, i64 %17
  %19 = invoke noundef zeroext i1 @_ZNKSt9basic_iosIcSt11char_traitsIcEEcvbEv(ptr noundef nonnull align 8 dereferenceable(264) %18)
          to label %20 unwind label %35

20:                                               ; preds = %14
  br i1 %19, label %21, label %.loopexit

21:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #6
  call void @_ZNSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3)
  %22 = invoke noundef zeroext i1 @_ZSt11regex_matchISt11char_traitsIcESaIcESaINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS3_12basic_stringIcS1_S2_EEEEEEEcNS3_12regex_traitsIcEEEbRKNS9_IT2_T_T0_EERNS3_13match_resultsINSJ_14const_iteratorET1_EERKNS3_11basic_regexISG_T3_EENSt15regex_constants15match_flag_typeE(ptr noundef nonnull align 8 dereferenceable(32) %1, ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) @_ZZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11, i32 noundef 0)
          to label %23 unwind label %37

23:                                               ; preds = %21
  br i1 %22, label %24, label %41

24:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %4) #6
  %25 = invoke noundef nonnull align 8 dereferenceable(17) ptr @_ZNKSt7__cxx1113match_resultsIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEESaINS_9sub_matchISA_EEEEixEm(ptr noundef nonnull align 8 dereferenceable(32) %3, i64 noundef 2)
          to label %26 unwind label %39

26:                                               ; preds = %24
  invoke void @_ZNKSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS_12basic_stringIcSt11char_traitsIcESaIcEEEEEE3strEv(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %4, ptr noundef nonnull align 8 dereferenceable(17) %25)
          to label %.thread unwind label %39

.thread:                                          ; preds = %26
  %27 = call noundef ptr @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE5c_strEv(ptr noundef nonnull align 8 dereferenceable(32) %4) #6
  %28 = call double @atof(ptr noundef %27) #7
  %29 = fmul double %28, 1.000000e+06
  %30 = fptosi double %29 to i64
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #6
  call void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #6
  br label %.loopexit

31:                                               ; preds = %9
  %32 = landingpad { ptr, i32 }
          cleanup
  tail call void @__cxa_guard_abort(ptr nonnull @_ZGVZN12CppBenchmark6System13CpuClockSpeedEvE7patternB5cxx11) #6
  br label %45

33:                                               ; preds = %12
  %34 = landingpad { ptr, i32 }
          cleanup
  br label %44

35:                                               ; preds = %14, %.preheader
  %36 = landingpad { ptr, i32 }
          cleanup
  br label %43

37:                                               ; preds = %21
  %38 = landingpad { ptr, i32 }
          cleanup
  br label %42

39:                                               ; preds = %26, %24
  %40 = landingpad { ptr, i32 }
          cleanup
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %4) #6
  br label %42

41:                                               ; preds = %23
  call void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #6
  br label %.preheader

42:                                               ; preds = %39, %37
  %.pn = phi { ptr, i32 } [ %40, %39 ], [ %38, %37 ]
  call void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #6
  br label %43

.loopexit:                                        ; preds = %20, %.thread
  %.210 = phi i64 [ %30, %.thread ], [ -1, %20 ]
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %2) #6
  call void @llvm.lifetime.end.p0(i64 520, ptr nonnull %2) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %1) #6
  ret i64 %.210

43:                                               ; preds = %42, %35
  %.pn.pn = phi { ptr, i32 } [ %.pn, %42 ], [ %36, %35 ]
  call void @_ZNSt14basic_ifstreamIcSt11char_traitsIcEED1Ev(ptr noundef nonnull align 8 dereferenceable(256) %2) #6
  br label %44

44:                                               ; preds = %43, %33
  %.pn.pn.pn = phi { ptr, i32 } [ %.pn.pn, %43 ], [ %34, %33 ]
  call void @llvm.lifetime.end.p0(i64 520, ptr nonnull %2) #6
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %1) #6
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %1) #6
  br label %45

45:                                               ; preds = %44, %31
  %.pn.pn.pn.pn = phi { ptr, i32 } [ %.pn.pn.pn, %44 ], [ %32, %31 ]
  resume { ptr, i32 } %.pn.pn.pn.pn
}

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare double @atof(ptr nocapture noundef nonnull) local_unnamed_addr #5

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt6vectorINSt7__cxx119sub_matchIN9__gnu_cxx17__normal_iteratorIPKcNS0_12basic_stringIcSt11char_traitsIcESaIcEEEEEEESaISC_EED2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

attributes #0 = { nofree nounwind }
attributes #1 = { 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 #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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { inlinehint 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 #5 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 #6 = { nounwind }
attributes #7 = { nounwind willreturn memory(read) }

!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 = !{!"branch_weights", i32 1, i32 1048575}
!6 = !{!7, !7, i64 0}
!7 = !{!"vtable pointer", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass