From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Mitchell To: Geoff Keating Cc: "kenner@vlsi1.ultra.nyu.edu" , "jh@suse.cz" , "gcc@gcc.gnu.org" Subject: Re: simplify_subreg issues Date: Tue, 19 Jun 2001 22:05:00 -0000 Message-id: <24580000.993074627@localhost.localdomain> References: <200106121631.JAA05633@geoffk.org> X-SW-Source: 2001-06/msg01163.html > Think here of a hardware register, which is sensitive to 8-byte or > 4-byte accesses. Yeah -- but not a lot of hardware has registers that naturally store complex numbers. I wonder if we shouldn't just say that GCC makes no guarantees about the number of times something is accessed unless it is volatile and of one of the builtin C integer types. In pratice, that's what people usually care about. It might be better to make a limited promise that we could implement with confidence. -- Mark Mitchelll mark@codesourcery.com CodeSourcery, LLC http://www.codesourcery.com