Path: utzoo!telly!ddsw1!lll-winken!killer!mit-eddie!bloom-beacon!tut.cis.ohio-state.edu!osu-cis!att!ulysses!hector!ekrell
From: ekrell@hector.UUCP (Eduardo Krell)
Newsgroups: gnu.gcc.bug
Subject: Re: GCC 1.30 complaints
Message-ID: <10752@ulysses.homer.nj.att.com>
Date: 22 Oct 88 12:42:04 GMT
References: <8810220131.AA00312@ucsci.ucsc.edu>
Sender: netnews@ulysses.homer.nj.att.com
Reply-To: ekrell@hector.UUCP (Eduardo Krell)
Distribution: gnu
Organization: AT&T Bell Laboratories
Lines: 13

In article <8810220131.AA00312@ucsci.ucsc.edu> dsgn047@UCSCI.UCSC.EDU (10017047) writes:

>2)  Loop optimization.  GCC 1.30 does *not* get rid of empty for loops;
>does anybody know why? (I.e., 'for (a=0;a<100;a++);' is executed in its
>entirety.)

I don't know what your C compiler does, but if a is not equal to 100
after this for loop, it's generating wrong code.
You can't throw away this for loop since it is modifying a variable in
an outer scope.
    
Eduardo Krell                   AT&T Bell Laboratories, Murray Hill, NJ

UUCP: {att,decvax,ucbvax}!ulysses!ekrell  Internet: ekrell@ulysses.att.com