; LLVM IR from ashishzero/karma :: src/modules/core/lin_maths.ll (Z28nearest_point_origin_segment4Vec2S_Pf)

; 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"

%union.Vec2 = type { %struct.anon.1 }
%struct.anon.1 = type { float, float }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_Z8vec2_dot4Vec2S_(<2 x float>, <2 x float>) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zmi4Vec2S_(<2 x float>, <2 x float>) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zpl4Vec2S_(<2 x float>, <2 x float>) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zmlf4Vec2(float noundef, <2 x float>) #3

; Function Attrs: mustprogress uwtable
define dso_local <2 x float> @_Z28nearest_point_origin_segment4Vec2S_Pf(<2 x float> %0, <2 x float> %1, ptr noundef %2) #4 {
  %4 = alloca %union.Vec2, align 4
  %5 = alloca %union.Vec2, align 4
  %6 = alloca %union.Vec2, align 4
  %7 = alloca ptr, align 8
  %8 = alloca %union.Vec2, align 4
  %9 = alloca %union.Vec2, align 4
  %10 = alloca %union.Vec2, align 4
  %11 = alloca float, align 4
  %12 = alloca %union.Vec2, align 4
  %13 = alloca %union.Vec2, align 4
  %14 = alloca %union.Vec2, align 4
  %15 = alloca %union.Vec2, align 4
  %16 = alloca %union.Vec2, align 4
  %17 = alloca %union.Vec2, align 4
  %18 = alloca %union.Vec2, align 4
  %19 = getelementptr inbounds %union.Vec2, ptr %5, i32 0, i32 0
  store <2 x float> %0, ptr %19, align 4
  %20 = getelementptr inbounds %union.Vec2, ptr %6, i32 0, i32 0
  store <2 x float> %1, ptr %20, align 4
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #6
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %9, ptr align 4 %6, i64 8, i1 false), !tbaa.struct !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %10, ptr align 4 %5, i64 8, i1 false), !tbaa.struct !9
  %21 = getelementptr inbounds %union.Vec2, ptr %9, i32 0, i32 0
  %22 = load <2 x float>, ptr %21, align 4
  %23 = getelementptr inbounds %union.Vec2, ptr %10, i32 0, i32 0
  %24 = load <2 x float>, ptr %23, align 4
  %25 = call <2 x float> @_Zmi4Vec2S_(<2 x float> %22, <2 x float> %24)
  %26 = getelementptr inbounds %union.Vec2, ptr %8, i32 0, i32 0
  store <2 x float> %25, ptr %26, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #6
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %12, ptr align 4 %8, i64 8, i1 false), !tbaa.struct !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %13, ptr align 4 %8, i64 8, i1 false), !tbaa.struct !9
  %27 = getelementptr inbounds %union.Vec2, ptr %12, i32 0, i32 0
  %28 = load <2 x float>, ptr %27, align 4
  %29 = getelementptr inbounds %union.Vec2, ptr %13, i32 0, i32 0
  %30 = load <2 x float>, ptr %29, align 4
  %31 = call noundef float @_Z8vec2_dot4Vec2S_(<2 x float> %28, <2 x float> %30)
  store float %31, ptr %11, align 4, !tbaa !11
  %32 = call <2 x float> @_ZngRK4Vec2(ptr noundef nonnull align 4 dereferenceable(8) %5)
  %33 = getelementptr inbounds %union.Vec2, ptr %14, i32 0, i32 0
  store <2 x float> %32, ptr %33, align 4
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %15, ptr align 4 %8, i64 8, i1 false), !tbaa.struct !9
  %34 = getelementptr inbounds %union.Vec2, ptr %14, i32 0, i32 0
  %35 = load <2 x float>, ptr %34, align 4
  %36 = getelementptr inbounds %union.Vec2, ptr %15, i32 0, i32 0
  %37 = load <2 x float>, ptr %36, align 4
  %38 = call noundef float @_Z8vec2_dot4Vec2S_(<2 x float> %35, <2 x float> %37)
  %39 = load float, ptr %11, align 4, !tbaa !11
  %40 = fdiv float %38, %39
  %41 = load ptr, ptr %7, align 8, !tbaa !5
  store float %40, ptr %41, align 4, !tbaa !11
  %42 = load ptr, ptr %7, align 8, !tbaa !5
  %43 = load float, ptr %42, align 4, !tbaa !11
  %44 = fcmp ogt float 0.000000e+00, %43
  br i1 %44, label %45, label %46

45:                                               ; preds = %3
  br label %49

46:                                               ; preds = %3
  %47 = load ptr, ptr %7, align 8, !tbaa !5
  %48 = load float, ptr %47, align 4, !tbaa !11
  br label %49

49:                                               ; preds = %46, %45
  %50 = phi float [ 0.000000e+00, %45 ], [ %48, %46 ]
  %51 = fcmp olt float 1.000000e+00, %50
  br i1 %51, label %52, label %53

52:                                               ; preds = %49
  br label %63

53:                                               ; preds = %49
  %54 = load ptr, ptr %7, align 8, !tbaa !5
  %55 = load float, ptr %54, align 4, !tbaa !11
  %56 = fcmp ogt float 0.000000e+00, %55
  br i1 %56, label %57, label %58

57:                                               ; preds = %53
  br label %61

58:                                               ; preds = %53
  %59 = load ptr, ptr %7, align 8, !tbaa !5
  %60 = load float, ptr %59, align 4, !tbaa !11
  br label %61

61:                                               ; preds = %58, %57
  %62 = phi float [ 0.000000e+00, %57 ], [ %60, %58 ]
  br label %63

63:                                               ; preds = %61, %52
  %64 = phi float [ 1.000000e+00, %52 ], [ %62, %61 ]
  %65 = load ptr, ptr %7, align 8, !tbaa !5
  store float %64, ptr %65, align 4, !tbaa !11
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %16, ptr align 4 %5, i64 8, i1 false), !tbaa.struct !9
  %66 = load ptr, ptr %7, align 8, !tbaa !5
  %67 = load float, ptr %66, align 4, !tbaa !11
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %18, ptr align 4 %8, i64 8, i1 false), !tbaa.struct !9
  %68 = getelementptr inbounds %union.Vec2, ptr %18, i32 0, i32 0
  %69 = load <2 x float>, ptr %68, align 4
  %70 = call <2 x float> @_Zmlf4Vec2(float noundef %67, <2 x float> %69)
  %71 = getelementptr inbounds %union.Vec2, ptr %17, i32 0, i32 0
  store <2 x float> %70, ptr %71, align 4
  %72 = getelementptr inbounds %union.Vec2, ptr %16, i32 0, i32 0
  %73 = load <2 x float>, ptr %72, align 4
  %74 = getelementptr inbounds %union.Vec2, ptr %17, i32 0, i32 0
  %75 = load <2 x float>, ptr %74, align 4
  %76 = call <2 x float> @_Zpl4Vec2S_(<2 x float> %73, <2 x float> %75)
  %77 = getelementptr inbounds %union.Vec2, ptr %4, i32 0, i32 0
  store <2 x float> %76, ptr %77, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #6
  %78 = getelementptr inbounds %union.Vec2, ptr %4, i32 0, i32 0
  %79 = load <2 x float>, ptr %78, align 4
  ret <2 x float> %79
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local <2 x float> @_ZngRK4Vec2(ptr noundef nonnull align 4 dereferenceable(8)) #5

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress nounwind uwtable "min-legal-vector-width"="64" "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint mustprogress uwtable "min-legal-vector-width"="64" "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 #4 = { mustprogress uwtable "min-legal-vector-width"="64" "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 #5 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="64" "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 #6 = { 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 = !{i64 0, i64 8, !10}
!10 = !{!7, !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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"

%union.Vec2 = type { %struct.anon.1 }
%struct.anon.1 = type { float, float }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_Z8vec2_dot4Vec2S_(<2 x float>, <2 x float>) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zmi4Vec2S_(<2 x float>, <2 x float>) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zpl4Vec2S_(<2 x float>, <2 x float>) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local <2 x float> @_Zmlf4Vec2(float noundef, <2 x float>) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local <2 x float> @_Z28nearest_point_origin_segment4Vec2S_Pf(<2 x float> %0, <2 x float> %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #2 {
  %4 = alloca %union.Vec2, align 8
  store <2 x float> %0, ptr %4, align 8
  %5 = tail call <2 x float> @_Zmi4Vec2S_(<2 x float> %1, <2 x float> %0)
  %6 = tail call noundef float @_Z8vec2_dot4Vec2S_(<2 x float> %5, <2 x float> %5)
  %7 = call <2 x float> @_ZngRK4Vec2(ptr noundef nonnull align 4 dereferenceable(8) %4)
  %8 = call noundef float @_Z8vec2_dot4Vec2S_(<2 x float> %7, <2 x float> %5)
  %9 = fdiv float %8, %6
  %10 = fcmp olt float %9, 0.000000e+00
  %11 = fcmp ogt float %9, 1.000000e+00
  %not. = xor i1 %10, true
  %12 = and i1 %11, %not.
  %brmerge = or i1 %11, %10
  %.mux = select i1 %12, float 1.000000e+00, float 0.000000e+00
  %13 = select i1 %brmerge, float %.mux, float %9
  store float %13, ptr %2, align 4, !tbaa !5
  %.sroa.02.0.copyload = load <2 x float>, ptr %4, align 8, !tbaa !9
  %14 = call <2 x float> @_Zmlf4Vec2(float noundef %13, <2 x float> %5)
  %15 = call <2 x float> @_Zpl4Vec2S_(<2 x float> %.sroa.02.0.copyload, <2 x float> %14)
  ret <2 x float> %15
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local <2 x float> @_ZngRK4Vec2(ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #3

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="64" "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 = { inlinehint mustprogress uwtable "min-legal-vector-width"="64" "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 = { mustprogress uwtable "min-legal-vector-width"="64" "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 #3 = { inlinehint mustprogress nounwind uwtable "min-legal-vector-width"="64" "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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}


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