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Re: PR 23551: why should we coalesce inlined variables?

On 7/9/07, Alexandre Oliva <aoliva@redhat.com> wrote:
On Jul 9, 2007, Michael Matz <matz@suse.de> wrote:

> As some people said multiple times here, you can simply attach multiple
> variables to one SSA name.

Attaching the variables is just not enough.  You have to attach the
assignment points as well.  And I haven't see you address that at all,
even though it is a necessary part of the infrastructure.


Uh, this is simple.
each ssa name has a unique version number.
Each ssa name has a single definition statement.
Attaching the assignment points is as simple as setting a bitmap in
the bitmap for the version number.
To recover, SSA_NAME_DEF_STMT (ssa_name (bit index))

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