how to fix anti-optimization?

[Richard Henderson]

On Wed, Sep 12, 2001 at 11:35:00AM -0700, dalej@apple.com wrote:
> The substitution is done in the ARRAY_REF case of expr.c:expand_expr().  
> It looks like I could hack this by setting TREE_SIDE_EFFECTS on FP 
> constants, but surely that's not the right way to do it.  Any better ideas?

If the constant is not LEGITIMATE_CONSTANT_P, make the ARRAY_REF
expand as normal, then tag the resulting memory reference with a
REG_EQUAL note containing the known constant.


r~