; LLVM IR from zeux/meshoptimizer :: demo/main.ll (Z11isMeshValidRK4Mesh)

; 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.Mesh = type { %"class.std::vector", %"class.std::vector.0" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<Vertex, std::allocator<Vertex>>::_Vector_impl" }
%"struct.std::_Vector_base<Vertex, std::allocator<Vertex>>::_Vector_impl" = type { %"struct.std::_Vector_base<Vertex, std::allocator<Vertex>>::_Vector_impl_data" }
%"struct.std::_Vector_base<Vertex, std::allocator<Vertex>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::vector.0" = type { %"struct.std::_Vector_base.1" }
%"struct.std::_Vector_base.1" = type { %"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl" }
%"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl" = type { %"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl_data" }
%"struct.std::_Vector_base<unsigned int, std::allocator<unsigned int>>::_Vector_impl_data" = type { ptr, ptr, ptr }

; 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: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI6VertexSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11isMeshValidRK4Mesh(ptr noundef nonnull align 8 dereferenceable(48) %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.Mesh, ptr %9, i32 0, i32 1
  %11 = call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %10) #2
  store i64 %11, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.Mesh, ptr %12, i32 0, i32 0
  %14 = call noundef i64 @_ZNKSt6vectorI6VertexSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %13) #2
  store i64 %14, ptr %5, align 8, !tbaa !9
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = urem i64 %15, 3
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %19

18:                                               ; preds = %1
  store i1 false, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %45

19:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.Mesh, ptr %20, i32 0, i32 1
  %22 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %21, i64 noundef 0) #2
  store ptr %22, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %23

23:                                               ; preds = %38, %19
  %24 = load i64, ptr %8, align 8, !tbaa !9
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = icmp ult i64 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  store i32 2, ptr %6, align 4
  br label %41

28:                                               ; preds = %23
  %29 = load ptr, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %8, align 8, !tbaa !9
  %31 = getelementptr inbounds i32, ptr %29, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !11
  %33 = zext i32 %32 to i64
  %34 = load i64, ptr %5, align 8, !tbaa !9
  %35 = icmp uge i64 %33, %34
  br i1 %35, label %36, label %37

36:                                               ; preds = %28
  store i1 false, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %41

37:                                               ; preds = %28
  br label %38

38:                                               ; preds = %37
  %39 = load i64, ptr %8, align 8, !tbaa !9
  %40 = add i64 %39, 1
  store i64 %40, ptr %8, align 8, !tbaa !9
  br label %23, !llvm.loop !13

41:                                               ; preds = %36, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %42 = load i32, ptr %6, align 4
  switch i32 %42, label %44 [
    i32 2, label %43
  ]

43:                                               ; preds = %41
  store i1 true, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %44

44:                                               ; preds = %43, %41
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  br label %45

45:                                               ; preds = %44, %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %46 = load i1, ptr %2, align 1
  ret i1 %46
}

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 = { 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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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 nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorI6VertexSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z11isMeshValidRK4Mesh(ptr noundef nonnull align 8 dereferenceable(48) %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 24
  %3 = tail call noundef i64 @_ZNKSt6vectorIjSaIjEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %2) #1
  %4 = tail call noundef i64 @_ZNKSt6vectorI6VertexSaIS0_EE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #1
  %5 = urem i64 %3, 3
  %.not = icmp eq i64 %5, 0
  br i1 %.not, label %6, label %.critedge

6:                                                ; preds = %1
  %7 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNKSt6vectorIjSaIjEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %2, i64 noundef 0) #1
  %.not14.not15.not = icmp eq i64 %3, 0
  br i1 %.not14.not15.not, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %6, %.lr.ph
  %.016 = phi i64 [ %11, %.lr.ph ], [ 0, %6 ]
  %8 = getelementptr inbounds i32, ptr %7, i64 %.016
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = zext i32 %9 to i64
  %.not13 = icmp ugt i64 %4, %10
  %11 = add nuw i64 %.016, 1
  %exitcond.not = icmp ne i64 %11, %3
  %or.cond.not = select i1 %.not13, i1 %exitcond.not, i1 false
  br i1 %or.cond.not, label %.lr.ph, label %.critedge, !llvm.loop !9

.critedge:                                        ; preds = %.lr.ph, %6, %1
  %.2 = phi i1 [ false, %1 ], [ true, %6 ], [ %.not13, %.lr.ph ]
  ret i1 %.2
}

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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass