Path: utzoo!telly!ddsw1!mcdchg!rutgers!ucsd!sdcsvax!beowulf!dlong
From: dlong@beowulf.ucsd.edu (Dean Long)
Newsgroups: gnu.gcc.bug
Subject: Re: Bugs in gcc (I'm trying to get g++ working):
Message-ID: <5336@sdcsvax.UCSD.EDU>
Date: 29 Sep 88 00:53:16 GMT
References: <8809272301.AA01392@mouse.> <5335@sdcsvax.UCSD.EDU>
Sender: nobody@sdcsvax.UCSD.EDU
Reply-To: dlong@beowulf.UCSD.EDU (Dean Long)
Distribution: gnu
Organization: EE/CS Dept. U.C. San Diego
Lines: 41

>No fix, but the problem is returning a structure.  This simple program
>won't work for me:
>
>#include <stdio.h>
>
>FILE foo()
>{
>   FILE a;
>
>   return a;
>}
>
>Dean Long
>dlong@beowulf


Ok, I've found part (maybe all) of the problem.  This is for
Gcc 1.28 on Sun4 sparcs.  The problem is with block moves of more
than 16 bytes.  In output_block_move(), xoperands[]  should be
initialized before comparing elements to 0.  Since it is an
automatic variable by default, strange things show up.

-----BUG----FIX---CUT-------(CAREFULLY)-----HERE--------

*** output-sparc.c.orig	Wed Sep 28 17:39:41 1988
--- output-sparc.c	Wed Sep 28 17:40:57 1988
***************
*** 688,693 ****
--- 688,694 ----
  
    bzero (reg_conflicts, sizeof (reg_conflicts));
    bzero (op_conflicts, sizeof (op_conflicts));
+   bzero (xoperands, sizeof (xoperands));
  
    /* Get past the MEMs.  */
    operands[0] = XEXP (operands[0], 0);


Dean Long
University of California, San Diego
dlong@beowulf.ucsd.edu