From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Henderson <rth@redhat.com>
To: dalej@apple.com
Cc: gcc@gcc.gnu.org
Subject: Re: how to fix anti-optimization?
Date: Wed, 12 Sep 2001 15:14:00 -0000
Message-id: <20010912151445.A13526@redhat.com>
References: <200109121834.LAA21595@scv1.apple.com>
X-SW-Source: 2001-09/msg00489.html

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~