[cfe-dev] Vector conversion

[Douglas Gregor]

On Sep 2, 2010, at 8:19 AM, Gonsolo wrote:

> Hi!
> 
> Is this correct (SemaExpr.cpp, line 4763)?
> 
>      // If we are allowing lax vector conversions, and LHS and RHS are both
>      // vectors, the total size only needs to be the same. This is a bitcast;
>      // no bits are changed but the result type is different.
>      if (getLangOptions().LaxVectorConversions &&
>         (Context.getTypeSize(lhsType) == Context.getTypeSize(rhsType)))
>        return IncompatibleVectors;
> 
> I thought that if we are in "lax" mode and sizes match they are compatible.

Yes, but we still seem to warn about it:

  case IncompatibleVectors:
    DiagKind = diag::warn_incompatible_vectors;
    break;

	- Doug
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