; LLVM IR from ctlst-tech/catpilot :: os/freertos/osa/FreeRTOS-Plus-POSIX/source (FreeRTOS_POSIX_utils)

; 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 }

; 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 uwtable
define dso_local i32 @UTILS_TimespecAddNanoseconds(ptr noundef %0, i64 noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !11
  %9 = load ptr, ptr %6, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %14, label %11

11:                                               ; preds = %3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = icmp eq ptr %12, null
  br i1 %13, label %14, label %15

14:                                               ; preds = %11, %3
  store i32 -1, ptr %8, align 4, !tbaa !11
  br label %15

15:                                               ; preds = %14, %11
  %16 = load i32, ptr %8, align 4, !tbaa !11
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %47

18:                                               ; preds = %15
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.timespec, ptr %19, i32 0, i32 1
  %21 = load i64, ptr %20, align 8, !tbaa !13
  %22 = load i64, ptr %5, align 8, !tbaa !9
  %23 = add nsw i64 %21, %22
  store i64 %23, ptr %7, align 8, !tbaa !9
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = icmp slt i64 %24, 0
  br i1 %25, label %26, label %27

26:                                               ; preds = %18
  store i32 1, ptr %8, align 4, !tbaa !11
  br label %46

27:                                               ; preds = %18
  %28 = load i64, ptr %7, align 8, !tbaa !9
  %29 = srem i64 %28, 1000000000
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = getelementptr inbounds %struct.timespec, ptr %30, i32 0, i32 1
  store i64 %29, ptr %31, align 8, !tbaa !13
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.timespec, ptr %32, i32 0, i32 0
  %34 = load i64, ptr %33, align 8, !tbaa !15
  %35 = load i64, ptr %7, align 8, !tbaa !9
  %36 = sdiv i64 %35, 1000000000
  %37 = add nsw i64 %34, %36
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.timespec, ptr %38, i32 0, i32 0
  store i64 %37, ptr %39, align 8, !tbaa !15
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.timespec, ptr %40, i32 0, i32 0
  %42 = load i64, ptr %41, align 8, !tbaa !15
  %43 = icmp slt i64 %42, 0
  br i1 %43, label %44, label %45

44:                                               ; preds = %27
  store i32 1, ptr %8, align 4, !tbaa !11
  br label %45

45:                                               ; preds = %44, %27
  br label %46

46:                                               ; preds = %45, %26
  br label %47

47:                                               ; preds = %46, %15
  %48 = load i32, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i32 %48
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !10, i64 8}
!14 = !{!"timespec", !10, i64 0, !10, i64 8}
!15 = !{!14, !10, 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local range(i32 -1, 2) i32 @UTILS_TimespecAddNanoseconds(ptr noundef readonly %0, i64 noundef %1, ptr noundef writeonly %2) local_unnamed_addr #0 {
  %4 = icmp ne ptr %2, null
  %5 = icmp ne ptr %0, null
  %or.cond.not = and i1 %5, %4
  br i1 %or.cond.not, label %6, label %17

6:                                                ; preds = %3
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = add nsw i64 %8, %1
  %10 = icmp slt i64 %9, 0
  br i1 %10, label %17, label %11

11:                                               ; preds = %6
  %12 = urem i64 %9, 1000000000
  %13 = getelementptr inbounds i8, ptr %2, i64 8
  store i64 %12, ptr %13, align 8, !tbaa !5
  %14 = load i64, ptr %0, align 8, !tbaa !10
  %15 = udiv i64 %9, 1000000000
  %16 = add nsw i64 %14, %15
  store i64 %16, ptr %2, align 8, !tbaa !10
  %.lobit = lshr i64 %16, 63
  %spec.select = trunc nuw nsw i64 %.lobit to i32
  br label %17

17:                                               ; preds = %11, %6, %3
  %.0 = phi i32 [ -1, %3 ], [ 1, %6 ], [ %spec.select, %11 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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" }

!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 8}
!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 0}


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