; LLVM IR from aap/pdp6 :: newemu (common)

; 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"

%struct.timespec = type { i64, i64 }

@starttime = external hidden global %struct.timespec, align 8

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

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

; Function Attrs: nounwind
declare i32 @clock_gettime(i32 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i64 @gettime() #2 {
  %1 = alloca %struct.timespec, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %3 = call i32 @clock_gettime(i32 noundef 1, ptr noundef %1) #3
  %4 = load i64, ptr @starttime, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.timespec, ptr %1, i32 0, i32 0
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = sub nsw i64 %6, %4
  store i64 %7, ptr %5, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.timespec, ptr %1, i32 0, i32 1
  %9 = load i64, ptr %8, align 8, !tbaa !10
  store i64 %9, ptr %2, align 8, !tbaa !11
  %10 = getelementptr inbounds %struct.timespec, ptr %1, i32 0, i32 0
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = mul i64 %11, 1000
  %13 = mul i64 %12, 1000
  %14 = mul i64 %13, 1000
  %15 = load i64, ptr %2, align 8, !tbaa !11
  %16 = add i64 %15, %14
  store i64 %16, ptr %2, align 8, !tbaa !11
  %17 = load i64, ptr %2, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %1) #3
  ret i64 %17
}

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 = { 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, !7, i64 0}
!6 = !{!"timespec", !7, i64 0, !7, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !8, 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"

%struct.timespec = type { i64, i64 }

@starttime = external hidden local_unnamed_addr global %struct.timespec, align 8

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

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

; Function Attrs: nounwind
declare i32 @clock_gettime(i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i64 @gettime() local_unnamed_addr #2 {
  %1 = alloca %struct.timespec, align 8
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %1) #3
  %2 = call i32 @clock_gettime(i32 noundef 1, ptr noundef nonnull %1) #3
  %3 = load i64, ptr @starttime, align 8, !tbaa !5
  %4 = load i64, ptr %1, align 8, !tbaa !5
  %5 = sub nsw i64 %4, %3
  %6 = getelementptr inbounds i8, ptr %1, i64 8
  %7 = load i64, ptr %6, align 8, !tbaa !10
  %8 = mul i64 %5, 1000000000
  %9 = add i64 %7, %8
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %1) #3
  ret i64 %9
}

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 = { 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, !7, i64 0}
!6 = !{!"timespec", !7, i64 0, !7, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass