[PATCH] Fix PR C++/3172, wrongly turning reference of a vector type into pointer to a vector type

[Andrew_Pinski at PlayStation dot Sony dot Com]

Hi,
  The problem here is that when reconstruct_complex_type is reconstructing 
a reference type, it just builds a pointer type which is incorrect.  And 
this causes using the vector_size attribute on references to become 
pointers.  This patch fixes the problem by splitting the two cases of 
POINTER_TYPE_P into their own code.  Also this changes so that we rebuild 
the pointer/reference with the same mode as the old one and the 
pointer/reference which could have cause issues for ia64-hpux and s390x.

OK?  Bootstrapped and tested on powerpc64-linux-gnu with no regressions, 
also built and tested for spu-elf with no regressions.

Note to the people who are doing the rvalue references, you should check 
how rvalue references interact with vector types.

Thanks,
Andrew Pinski

ChangeLog:
        * tree.c (reconstruct_complex_type): Reconstruct a reference 
correctly.
        Also use the same mode for the pointer as the old pointer type.

        * g++.dg/ext/vector7.C: New testcase.

Attachment: fixpr31721.diff.txt
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