[Bug target/100703] __vector_pair and __vector_quad cannot be passed by reference

[alexander.grund--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100703

--- Comment #1 from Alexander Grund <alexander.gr...@tu-dresden.de> ---
It goes further: Even the usual conversion rules for pointer types don't apply:

void foo(__vector_pair*){}
void bar(const __vector_pair*){}
int main(){
  __vector_pair p;
  foo(p); // works
  bar(p); // fails
}