[tree-ssa] tree-ssa vs. fold

[Jeff Sturm]

On Sat, 28 Jun 2003, Jason Merrill wrote:
> A GIMPLE binop node can never have side effects; as of my recent change to
> is_gimple_val, a volatile decl will be copied into a temporary.

Oh, I see.  I wasn't aware of this change.  That does make things a little
easier...

> > 	* fold-const.c (fold): Don't save_expr unless TREE_SIDE_EFFECTS.
>
> OK.

I've applied this hunk.  Thanks.

> > 	* tree-ssa.c (rewrite_and_optimize_stmt): Check has_volatile_ops
> > 	before folding.
>
> I don't think this is necessary anymore.

I agree.  I bootstrapped again without, just in case.  There was no
change.

Jeff