[eigen] alignment question

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Dear all,

I currently migrate my application to use Vector4f instead of Vector3f to benefit the vectorisation.
However I face an alignment error at runtime. (I use the latest clang from xcode on mac os x)

Vector4f toPoint(const Vector4f &v) {
  return Vector4f( v.x(), v.y(), v.z(), 1 );

void process( const Vector4f &v ) {
  // do process my vector

is there an issue with the alignment doing the following?

Vector4f v (1,3,4,0);
process( toPoint(v) );

Please let me know, I have the suspicion that the error comes from there, I wonder if I am right.

Best regards,

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