optimization/2649: optimization compilation error, causing unaligned execptions on Alpha Linux

[rth@gcc.gnu.org]

Synopsis: optimization compilation error, causing unaligned execptions on Alpha Linux

Responsible-Changed-From-To: unassigned->rth
Responsible-Changed-By: rth
Responsible-Changed-When: Wed Feb 20 17:36:31 2002
Responsible-Changed-Why:
    .
State-Changed-From-To: open->closed
State-Changed-By: rth
State-Changed-When: Wed Feb 20 17:36:31 2002
State-Changed-Why:
    I remember fixing this quite some time ago. I think with
    
    revision 1.152
    date: 2000/12/29 11:51:01;  author: rth;  state: Exp;  lines: +192 -39
            * config/alpha/alpha.c (alpha_expand_block_move): Initialize
            src_align and dst_align in bits.  Do unaligned quadword loads
            if possible for BWX too.
            (alpha_expand_block_clear): Initialize align in bits.  Track
            small leading offsets into a larger alignment.  Play games with
            stq_u for large 4-byte aligned blocks.  Use load/mask/store
            for appropreately aligned heads and tails.
    
    
    which would be after the 2.96 branch date.  In either case,
    both gcc 3.0 and 3.1 should have this fixed.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=2649