Sandy Bridge-specific double load ports optimization

[Martin Millnert]

Clarification,

On Wed, 2012-02-01 at 23:53 +0100, Martin Millnert wrote:
> Hi gcc-help,
> 
> I have a question regarding an optimization example for the Sandy Bridge
> march.
> 
> In the Intel 64 and IA-32 Architectures Optimization Reference Manual
> [1] on page 183, sec 3.6.1.2, there is a piece about optimizing L1D

This should be 3.6.1.1, on p. 181.  What I'm looking for is a way to
make GCC produce code that alternates register dependencies, such that
the double load ports of the architecture can be utilized, as in RHS of
example on page 3-32 (182).

Regards,
Martin