TREE_SYMBOL_REFERENCED, assemble_name, memory wastage

[Zack Weinberg]

On Sat, Nov 18, 2000 at 09:15:12AM -0800, Richard Henderson wrote:
> On Fri, Nov 17, 2000 at 10:19:00PM -0800, Zack Weinberg wrote:
> > To put TREE_SYMBOL_REFERENCED in decls instead, we'd need to set it
> > way upstream, in tree->RTL conversion.  And then we'd need to make all
> > the optimizers update it when they deleted dead code.  This is not
> > happening.
> 
> Have assemble_name put all the strings that it outputs into
> a hash table.  TREE_SYMBOL_REFERENCED becomes the property
> of being in that data structure.

Good idea.  Unfortunately it turns out there's several other flags
that are relevant on identifier nodes (at least TREE_ADDRESSABLE and
TREE_USED).  I have to think about this some more.

zw