From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Hayes <m.hayes@elec.canterbury.ac.nz>
To: law@cygnus.com
Cc: Michael Hayes <m.hayes@elec.canterbury.ac.nz>, egcs@cygnus.com
Subject: Re: Ternary operator in loop condition
Date: Sun, 31 Jan 1999 23:58:00 -0000
Message-id: <13977.33688.460065.141289@ongaonga.elec.canterbury.ac.nz>
References: <13976.30162.513083.611567"@ongaonga.elec.canterbury.ac.nz> <18943.916017460@hurl.cygnus.com>
X-SW-Source: 1999-01n/msg00329.html

 > It may be something that could be caught by gcse/pre once alias analysis is
 > tied into that pass.

How about a case where there is no aliasing.  What mods are required
for the gcse/pre pass to hoist "(bar ? 4 : 8)" from the loop in the
following example?

static char fred[100];

void foo(bar)
     int bar;
{
  int i;
  
  for (i = 0; i < (bar ? 4 : 8); i++)
    fred[i] = 0;
}

Michael.