; LLVM IR from kimwalisch/primesieve :: src/PrimeSieveClass.ll (ZNK10primesieve10PrimeSieve11getDistanceEv)

; 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.primesieve::PrimeSieve" = type { ptr, i64, i64, double, double, %"class.primesieve::Array", i64, i64, i32, i32, ptr }
%"class.primesieve::Array" = type { [6 x i64] }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZNK10primesieve10PrimeSieve11getDistanceEv(ptr noundef nonnull align 8 dereferenceable(120) %0) #0 align 2 {
  %2 = alloca i64, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load ptr, ptr %3, align 8
  %5 = getelementptr inbounds %"class.primesieve::PrimeSieve", ptr %4, i32 0, i32 1
  %6 = load i64, ptr %5, align 8, !tbaa !9
  %7 = getelementptr inbounds %"class.primesieve::PrimeSieve", ptr %4, i32 0, i32 2
  %8 = load i64, ptr %7, align 8, !tbaa !15
  %9 = icmp ule i64 %6, %8
  br i1 %9, label %10, label %16

10:                                               ; preds = %1
  %11 = getelementptr inbounds %"class.primesieve::PrimeSieve", ptr %4, i32 0, i32 2
  %12 = load i64, ptr %11, align 8, !tbaa !15
  %13 = getelementptr inbounds %"class.primesieve::PrimeSieve", ptr %4, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !9
  %15 = sub i64 %12, %14
  store i64 %15, ptr %2, align 8
  br label %17

16:                                               ; preds = %1
  store i64 0, ptr %2, align 8
  br label %17

17:                                               ; preds = %16, %10
  %18 = load i64, ptr %2, align 8
  ret i64 %18
}

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" }

!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, !11, i64 8}
!10 = !{!"_ZTSN10primesieve10PrimeSieveE", !11, i64 8, !11, i64 16, !12, i64 24, !12, i64 32, !13, i64 40, !11, i64 88, !11, i64 96, !14, i64 104, !14, i64 108, !6, i64 112}
!11 = !{!"long", !7, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = !{!"_ZTSN10primesieve5ArrayImLm6EEE", !7, i64 0}
!14 = !{!"int", !7, i64 0}
!15 = !{!10, !11, i64 16}


; 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: read) uwtable
define dso_local noundef i64 @_ZNK10primesieve10PrimeSieve11getDistanceEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(120) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load i64, ptr %4, align 8, !tbaa !14
  %.0 = tail call i64 @llvm.usub.sat.i64(i64 %5, i64 %3)
  ret i64 %.0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.usub.sat.i64(i64, i64) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: 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 #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"_ZTSN10primesieve10PrimeSieveE", !7, i64 8, !7, i64 16, !10, i64 24, !10, i64 32, !11, i64 40, !7, i64 88, !7, i64 96, !12, i64 104, !12, i64 108, !13, i64 112}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"double", !8, i64 0}
!11 = !{!"_ZTSN10primesieve5ArrayImLm6EEE", !8, i64 0}
!12 = !{!"int", !8, i64 0}
!13 = !{!"any pointer", !8, i64 0}
!14 = !{!6, !7, i64 16}


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