; LLVM IR from AliveToolkit/alive2 :: util/stopwatch.ll (ZN4util9StopWatch4stopEv)

; 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.util::StopWatch" = type <{ %"class.std::chrono::time_point", %"class.std::chrono::time_point", i8, [7 x i8] }>

@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@__PRETTY_FUNCTION__._ZN4util9StopWatch4stopEv = external hidden unnamed_addr constant [29 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [17 x i8], align 1

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

; Function Attrs: mustprogress nounwind uwtable
declare hidden i64 @_ZL3nowv() #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; 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 void @_ZN4util9StopWatch4stopEv(ptr noundef nonnull align 8 dereferenceable(17) %0) #3 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca %"class.std::chrono::time_point", align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %4 = load ptr, ptr %2, align 8
  %5 = getelementptr inbounds %"class.util::StopWatch", ptr %4, i32 0, i32 2
  %6 = load i8, ptr %5, align 8, !tbaa !9, !range !15, !noundef !16
  %7 = trunc i8 %6 to i1
  %8 = xor i1 %7, true
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  br label %12

10:                                               ; preds = %1
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 22, ptr noundef @__PRETTY_FUNCTION__._ZN4util9StopWatch4stopEv) #5
  unreachable

11:                                               ; No predecessors!
  br label %12

12:                                               ; preds = %11, %9
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %13 = call i64 @_ZL3nowv()
  %14 = getelementptr inbounds %"class.std::chrono::time_point", ptr %3, i32 0, i32 0
  %15 = getelementptr inbounds %"class.std::chrono::duration", ptr %14, i32 0, i32 0
  store i64 %13, ptr %15, align 8
  %16 = getelementptr inbounds %"class.util::StopWatch", ptr %4, i32 0, i32 1
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %16, ptr align 8 %3, i64 8, i1 false), !tbaa.struct !17
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  %17 = getelementptr inbounds %"class.util::StopWatch", ptr %4, i32 0, i32 2
  store i8 1, ptr %17, align 8, !tbaa !9
  br i1 true, label %18, label %19

18:                                               ; preds = %12
  br label %21

19:                                               ; preds = %12
  call void @__assert_fail(ptr noundef @.str.2, ptr noundef @.str.1, i32 noundef 24, ptr noundef @__PRETTY_FUNCTION__._ZN4util9StopWatch4stopEv) #5
  unreachable

20:                                               ; No predecessors!
  br label %21

21:                                               ; preds = %20, %18
  ret void
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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 #4 = { noreturn 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 #5 = { noreturn nounwind }
attributes #6 = { 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, !14, i64 16}
!10 = !{!"_ZTSN4util9StopWatchE", !11, i64 0, !11, i64 8, !14, i64 16}
!11 = !{!"_ZTSNSt6chrono10time_pointINS_3_V212steady_clockENS_8durationIlSt5ratioILl1ELl1000000000EEEEEE", !12, i64 0}
!12 = !{!"_ZTSNSt6chrono8durationIlSt5ratioILl1ELl1000000000EEEE", !13, i64 0}
!13 = !{!"long", !7, i64 0}
!14 = !{!"bool", !7, i64 0}
!15 = !{i8 0, i8 2}
!16 = !{}
!17 = !{i64 0, i64 8, !18}
!18 = !{!13, !13, 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"

@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [72 x i8], align 1
@__PRETTY_FUNCTION__._ZN4util9StopWatch4stopEv = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare hidden i64 @_ZL3nowv() local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4util9StopWatch4stopEv(ptr nocapture noundef nonnull align 8 dereferenceable(17) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i8, ptr %2, align 8, !tbaa !5, !range !13, !noundef !14
  %4 = trunc nuw i8 %3 to i1
  br i1 %4, label %5, label %6

5:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 22, ptr noundef nonnull @__PRETTY_FUNCTION__._ZN4util9StopWatch4stopEv) #2
  unreachable

6:                                                ; preds = %1
  %7 = tail call i64 @_ZL3nowv()
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  store i64 %7, ptr %8, align 8, !tbaa !15
  store i8 1, ptr %2, align 8, !tbaa !5
  ret void
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #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 = { noreturn 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 = { noreturn 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, !12, i64 16}
!6 = !{!"_ZTSN4util9StopWatchE", !7, i64 0, !7, i64 8, !12, 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 = !{!"bool", !10, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = !{!9, !9, i64 0}


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