; LLVM IR from secretflow/yacl :: yacl/utils/elapsed_timer.ll (ZNK4yacl12ElapsedTimer7CountMsEv)

; 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::chrono::time_point" = type { %"class.std::chrono::duration" }
%"class.std::chrono::duration" = type { i64 }
%"class.std::chrono::duration.0" = type { i64 }
%"class.yacl::ElapsedTimer" = type <{ %"class.std::chrono::time_point", double, i8, [7 x i8] }>

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

; Function Attrs: nounwind
declare i64 @_ZNSt6chrono3_V212steady_clock3nowEv() #1

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

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_ZNK4yacl12ElapsedTimer7CountMsEv(ptr noundef nonnull align 8 dereferenceable(17) %0) #2 align 2 {
  %2 = alloca double, align 8
  %3 = alloca ptr, align 8
  %4 = alloca %"class.std::chrono::time_point", align 8
  %5 = alloca double, align 8
  %6 = alloca %"class.std::chrono::duration.0", align 8
  %7 = alloca %"class.std::chrono::duration", align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  %9 = getelementptr inbounds %"class.yacl::ElapsedTimer", ptr %8, i32 0, i32 2
  %10 = load i8, ptr %9, align 8, !tbaa !9, !range !16, !noundef !17
  %11 = trunc i8 %10 to i1
  br i1 %11, label %12, label %16

12:                                               ; preds = %1
  %13 = getelementptr inbounds %"class.yacl::ElapsedTimer", ptr %8, i32 0, i32 1
  %14 = load double, ptr %13, align 8, !tbaa !18
  %15 = fdiv double %14, 1.000000e+03
  store double %15, ptr %2, align 8
  br label %32

16:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %17 = call i64 @_ZNSt6chrono3_V212steady_clock3nowEv() #4
  %18 = getelementptr inbounds %"class.std::chrono::time_point", ptr %4, i32 0, i32 0
  %19 = getelementptr inbounds %"class.std::chrono::duration", ptr %18, i32 0, i32 0
  store i64 %17, ptr %19, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %20 = getelementptr inbounds %"class.yacl::ElapsedTimer", ptr %8, i32 0, i32 0
  %21 = call i64 @_ZNSt6chronomiINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEES6_EENSt11common_typeIJT0_T1_EE4typeERKNS_10time_pointIT_S8_EERKNSC_ISD_S9_EE(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(8) %20)
  %22 = getelementptr inbounds %"class.std::chrono::duration", ptr %7, i32 0, i32 0
  store i64 %21, ptr %22, align 8
  %23 = call i64 @_ZNSt6chrono13duration_castINS_8durationIlSt5ratioILl1ELl1000000EEEElS2_ILl1ELl1000000000EEEENSt9enable_ifIXsr13__is_durationIT_EE5valueES7_E4typeERKNS1_IT0_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %7)
  %24 = getelementptr inbounds %"class.std::chrono::duration.0", ptr %6, i32 0, i32 0
  store i64 %23, ptr %24, align 8
  %25 = call noundef i64 @_ZNKSt6chrono8durationIlSt5ratioILl1ELl1000000EEE5countEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  %26 = sitofp i64 %25 to double
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  store double %26, ptr %5, align 8, !tbaa !19
  %27 = load double, ptr %5, align 8, !tbaa !19
  %28 = getelementptr inbounds %"class.yacl::ElapsedTimer", ptr %8, i32 0, i32 1
  %29 = load double, ptr %28, align 8, !tbaa !18
  %30 = fadd double %27, %29
  %31 = fdiv double %30, 1.000000e+03
  store double %31, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %32

32:                                               ; preds = %16, %12
  %33 = load double, ptr %2, align 8
  ret double %33
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt6chrono13duration_castINS_8durationIlSt5ratioILl1ELl1000000EEEElS2_ILl1ELl1000000000EEEENSt9enable_ifIXsr13__is_durationIT_EE5valueES7_E4typeERKNS1_IT0_T1_EE(ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt6chronomiINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEES6_EENSt11common_typeIJT0_T1_EE4typeERKNS_10time_pointIT_S8_EERKNSC_ISD_S9_EE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6chrono8durationIlSt5ratioILl1ELl1000000EEE5countEv(ptr noundef nonnull align 8 dereferenceable(8)) #3 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 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 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 #4 = { 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, !15, i64 16}
!10 = !{!"_ZTSN4yacl12ElapsedTimerE", !11, i64 0, !14, i64 8, !15, i64 16}
!11 = !{!"_ZTSNSt6chrono10time_pointINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEEEE", !12, i64 0}
!12 = !{!"_ZTSNSt6chrono8durationIlSt5ratioILl1ELl1000000000EEEE", !13, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = !{!"double", !7, i64 0}
!15 = !{!"bool", !7, i64 0}
!16 = !{i8 0, i8 2}
!17 = !{}
!18 = !{!10, !14, i64 8}
!19 = !{!14, !14, i64 0}


; 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::chrono::time_point" = type { %"class.std::chrono::duration" }
%"class.std::chrono::duration" = type { i64 }
%"class.std::chrono::duration.0" = type { i64 }

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

; Function Attrs: nounwind
declare i64 @_ZNSt6chrono3_V212steady_clock3nowEv() local_unnamed_addr #1

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

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_ZNK4yacl12ElapsedTimer7CountMsEv(ptr noundef nonnull align 8 dereferenceable(17) %0) local_unnamed_addr #2 align 2 {
  %2 = alloca %"class.std::chrono::time_point", align 8
  %3 = alloca %"class.std::chrono::duration.0", align 8
  %4 = alloca %"class.std::chrono::duration", align 8
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load i8, ptr %5, align 8, !tbaa !5, !range !14, !noundef !15
  %7 = trunc nuw i8 %6 to i1
  br i1 %7, label %8, label %11

8:                                                ; preds = %1
  %9 = getelementptr inbounds i8, ptr %0, i64 8
  %10 = load double, ptr %9, align 8, !tbaa !16
  br label %20

11:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %12 = tail call i64 @_ZNSt6chrono3_V212steady_clock3nowEv() #4
  store i64 %12, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #4
  %13 = call i64 @_ZNSt6chronomiINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEES6_EENSt11common_typeIJT0_T1_EE4typeERKNS_10time_pointIT_S8_EERKNSC_ISD_S9_EE(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(8) %0)
  store i64 %13, ptr %4, align 8
  %14 = call i64 @_ZNSt6chrono13duration_castINS_8durationIlSt5ratioILl1ELl1000000EEEElS2_ILl1ELl1000000000EEEENSt9enable_ifIXsr13__is_durationIT_EE5valueES7_E4typeERKNS1_IT0_T1_EE(ptr noundef nonnull align 8 dereferenceable(8) %4)
  store i64 %14, ptr %3, align 8
  %15 = call noundef i64 @_ZNKSt6chrono8durationIlSt5ratioILl1ELl1000000EEE5countEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
  %16 = sitofp i64 %15 to double
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  %17 = getelementptr inbounds i8, ptr %0, i64 8
  %18 = load double, ptr %17, align 8, !tbaa !16
  %19 = fadd double %18, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  br label %20

20:                                               ; preds = %11, %8
  %.0.in = phi double [ %10, %8 ], [ %19, %11 ]
  %.0 = fdiv double %.0.in, 1.000000e+03
  ret double %.0
}

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt6chrono13duration_castINS_8durationIlSt5ratioILl1ELl1000000EEEElS2_ILl1ELl1000000000EEEENSt9enable_ifIXsr13__is_durationIT_EE5valueES7_E4typeERKNS1_IT0_T1_EE(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_ZNSt6chronomiINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEES6_EENSt11common_typeIJT0_T1_EE4typeERKNS_10time_pointIT_S8_EERKNSC_ISD_S9_EE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6chrono8durationIlSt5ratioILl1ELl1000000EEE5countEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #3 align 2

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 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 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 #4 = { 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, !13, i64 16}
!6 = !{!"_ZTSN4yacl12ElapsedTimerE", !7, i64 0, !12, i64 8, !13, i64 16}
!7 = !{!"_ZTSNSt6chrono10time_pointINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEEEE", !8, i64 0}
!8 = !{!"_ZTSNSt6chrono8durationIlSt5ratioILl1ELl1000000000EEEE", !9, i64 0}
!9 = !{!"long", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"double", !10, i64 0}
!13 = !{!"bool", !10, i64 0}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = !{!6, !12, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,TailCallElimPass