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Re: Fix powerpc64 g77
- From: Gabriel Dos Reis <gdr at integrable-solutions dot net>
- To: Mark Mitchell <mark at codesourcery dot com>
- Cc: David Edelsohn <dje at watson dot ibm dot com>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>, Alan Modra <amodra at bigpond dot net dot au>
- Date: 01 Aug 2002 23:23:16 +0200
- Subject: Re: Fix powerpc64 g77
- Organization: CodeSourcery, LLC
- References: <32320000.1028236190@warlock.codesourcery.com>
Mark Mitchell <mark@codesourcery.com> writes:
[...]
| > Actually, since the path is known at compile time to be dead, I don't
| > think the compiler should be issueing such diagnostic about the runtime
| > behaviour.
|
| I disagree -- and I don't know of any other compilers that work as
| you suggest.
Not just because they aren't working that way means it is OK :-)
| The whole point of using run-time conditionals is to allow the compiler
| to issue errors and warnings about pieces of code that we would otherwise
| not compile -- thereby preventing build failures for people with
| machines different from our own.
Whereas I agree with the general philosohy of the run-time
conditionals, I don't think that in this particular case, the warning
is any meaningful. It is about the value of an expression in a path
that would never be taken.
-- Gaby