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Re: Complex types aliasing and MEM_IN_STRUCT_P

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: Andrew Pinski <pinskia at physics dot uc dot edu>
Cc: "Joseph S. Myers" <joseph at codesourcery dot com>, gcc-patches at gcc dot gnu dot org
Date: Wed, 14 Feb 2007 07:50:20 +0100
Subject: Re: Complex types aliasing and MEM_IN_STRUCT_P
References: <200702140626.l1E6QfI6017648@localhost.localdomain>

I would suspect that vector-types have the same problem.


I doubt that because vector type is not treated like an aggregate but
instead it has the same aliasing set as the underlying type.

You're right.

Should complex types be implemented that way also?

Given the presence of instructions like HADDW in some processors, which allow one to use vectors of 2N elements to represent N complex values, I would be inclined to say yes.

Paolo

References:
- Re: Complex types aliasing and MEM_IN_STRUCT_P
  - From: Andrew Pinski

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