From: Richard Earnshaw <rearnsha@arm.com>
To: Richard Henderson <rth@redhat.com>
Cc: Momchil Velikov <velco@fadata.bg>,
Alan Modra <amodra@bigpond.net.au>,
gcc@gcc.gnu.org, Richard.Earnshaw@arm.com
Subject: Re: Undefined behavior in 950605-1.c
Date: Fri, 26 Jul 2002 14:47:00 -0000 [thread overview]
Message-ID: <200207260854.JAA14169@cam-mail2.cambridge.arm.com> (raw)
In-Reply-To: Your message of "Thu, 25 Jul 2002 10:56:12 PDT." <20020725105612.A27073@redhat.com>
> PROMOTE_MODE has nothing to do with C types. It's for efficiency
> in the generated rtl *only*.
I believe it can also be part of the ABI specification, so someone writing
assembler would be able to tell the difference, and a compiler can assume
that a caller has done the promotion (so saving a repeat promotion).
> If a strictly conforming program can
> notice the existance of PROMOTE_MODE, there is a bug.
Agreed.
R.
next prev parent reply other threads:[~2002-07-26 8:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-07-25 7:08 Momchil Velikov
2002-07-25 8:54 ` Andreas Schwab
2002-07-25 9:04 ` Momchil Velikov
[not found] ` <20020725102412.GV26054@bubble.sa.bigpond.net.au>
2002-07-25 10:56 ` Momchil Velikov
2002-07-25 11:24 ` Andreas Schwab
2002-07-25 13:25 ` Richard Henderson
2002-07-26 14:47 ` Richard Earnshaw [this message]
2002-07-28 0:08 ` Richard Henderson
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