; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R2Shapes/R2Vector.ll (ZN8R2Vector9NormalizeEv)

; 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.R2Vector = type { [2 x double] }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef double @_ZNK8R2Vector6LengthEv(ptr noundef nonnull align 8 dereferenceable(16)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN8R2Vector9NormalizeEv(ptr noundef nonnull align 8 dereferenceable(16) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca double, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %6 = call noundef double @_ZNK8R2Vector6LengthEv(ptr noundef nonnull align 8 dereferenceable(16) %5)
  store double %6, ptr %3, align 8, !tbaa !9
  %7 = load double, ptr %3, align 8, !tbaa !9
  %8 = fcmp oeq double %7, 0.000000e+00
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 1, ptr %4, align 4
  br label %21

10:                                               ; preds = %1
  %11 = load double, ptr %3, align 8, !tbaa !9
  %12 = getelementptr inbounds %class.R2Vector, ptr %5, i32 0, i32 0
  %13 = getelementptr inbounds [2 x double], ptr %12, i64 0, i64 0
  %14 = load double, ptr %13, align 8, !tbaa !9
  %15 = fdiv double %14, %11
  store double %15, ptr %13, align 8, !tbaa !9
  %16 = load double, ptr %3, align 8, !tbaa !9
  %17 = getelementptr inbounds %class.R2Vector, ptr %5, i32 0, i32 0
  %18 = getelementptr inbounds [2 x double], ptr %17, i64 0, i64 1
  %19 = load double, ptr %18, align 8, !tbaa !9
  %20 = fdiv double %19, %16
  store double %20, ptr %18, align 8, !tbaa !9
  store i32 0, ptr %4, align 4
  br label %21

21:                                               ; preds = %10, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  %22 = load i32, ptr %4, align 4
  switch i32 %22, label %24 [
    i32 0, label %23
    i32 1, label %23
  ]

23:                                               ; preds = %21, %21
  ret void

24:                                               ; preds = %21
  unreachable
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"double", !7, 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 nounwind uwtable
declare dso_local noundef double @_ZNK8R2Vector6LengthEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN8R2Vector9NormalizeEv(ptr noundef nonnull align 8 dereferenceable(16) %0) local_unnamed_addr #0 align 2 {
  %2 = tail call noundef double @_ZNK8R2Vector6LengthEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %3 = fcmp oeq double %2, 0.000000e+00
  br i1 %3, label %9, label %4

4:                                                ; preds = %1
  %5 = load <2 x double>, ptr %0, align 8, !tbaa !5
  %6 = insertelement <2 x double> poison, double %2, i64 0
  %7 = shufflevector <2 x double> %6, <2 x double> poison, <2 x i32> zeroinitializer
  %8 = fdiv <2 x double> %5, %7
  store <2 x double> %8, ptr %0, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %1, %4
  ret void
}

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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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