; LLVM IR from chrxh/alien :: source/Base/Vector2D.ll (ZN12RealVector2DC2ESt16initializer_listIfE)

; 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.std::initializer_list" = type { ptr, i64 }
%struct.RealVector2D = type { float, float }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN12RealVector2DC2ESt16initializer_listIfE(ptr noundef nonnull align 4 dereferenceable(8) %0, ptr %1, i64 %2) unnamed_addr #0 align 2 {
  %4 = alloca %"class.std::initializer_list", align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = getelementptr inbounds { ptr, i64 }, ptr %4, i32 0, i32 0
  store ptr %1, ptr %7, align 8
  %8 = getelementptr inbounds { ptr, i64 }, ptr %4, i32 0, i32 1
  store i64 %2, ptr %8, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %5, align 8
  %10 = getelementptr inbounds %struct.RealVector2D, ptr %9, i32 0, i32 0
  store float 0.000000e+00, ptr %10, align 4, !tbaa !9
  %11 = getelementptr inbounds %struct.RealVector2D, ptr %9, i32 0, i32 1
  store float 0.000000e+00, ptr %11, align 4, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %12 = call noundef ptr @_ZNKSt16initializer_listIfE5beginEv(ptr noundef nonnull align 8 dereferenceable(16) %4) #2
  store ptr %12, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = getelementptr inbounds float, ptr %13, i32 1
  store ptr %14, ptr %6, align 8, !tbaa !5
  %15 = load float, ptr %13, align 4, !tbaa !13
  %16 = getelementptr inbounds %struct.RealVector2D, ptr %9, i32 0, i32 0
  store float %15, ptr %16, align 4, !tbaa !9
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load float, ptr %17, align 4, !tbaa !13
  %19 = getelementptr inbounds %struct.RealVector2D, ptr %9, i32 0, i32 1
  store float %18, ptr %19, align 4, !tbaa !12
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  ret void
}

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

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt16initializer_listIfE5beginEv(ptr noundef nonnull align 8 dereferenceable(16)) #0 align 2

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

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, !11, i64 0}
!10 = !{!"_ZTS12RealVector2D", !11, i64 0, !11, i64 4}
!11 = !{!"float", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!11, !11, 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"

%"class.std::initializer_list" = type { ptr, i64 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN12RealVector2DC2ESt16initializer_listIfE(ptr nocapture noundef nonnull writeonly align 4 dereferenceable(8) %0, ptr %1, i64 %2) unnamed_addr #0 align 2 {
  %4 = alloca %"class.std::initializer_list", align 8
  store ptr %1, ptr %4, align 8
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  store i64 %2, ptr %5, align 8
  %6 = getelementptr inbounds i8, ptr %0, i64 4
  store <2 x float> zeroinitializer, ptr %0, align 4, !tbaa !5
  %7 = call noundef ptr @_ZNKSt16initializer_listIfE5beginEv(ptr noundef nonnull align 8 dereferenceable(16) %4) #1
  %8 = getelementptr inbounds i8, ptr %7, i64 4
  %9 = load float, ptr %7, align 4, !tbaa !5
  store float %9, ptr %0, align 4, !tbaa !9
  %10 = load float, ptr %8, align 4, !tbaa !5
  store float %10, ptr %6, align 4, !tbaa !11
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef ptr @_ZNKSt16initializer_listIfE5beginEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS12RealVector2D", !6, i64 0, !6, i64 4}
!11 = !{!10, !6, i64 4}


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