optimization/10362: Optimization with constant shifts and com pares fails on MIPS

[Berger David-MGI2063]

Copy code below to junk.c and compile as follows:  gcc -o junk.s -O2 -S junk.c

volatile unsigned long i;

void test(void)
{
  i = (((i & 0xf0) >> 4) >= 14); /* This one generates incorrect code with -O2 */
  i = ((i & 0xf0) >= (14 << 4)); /* This is what the optimizer is trying to do */ }


-----Original Message-----
From: bangerth@dealii.org [mailto:bangerth@dealii.org] 
Sent: Wednesday, April 09, 2003 3:45 PM
To: David Berger; gcc-bugs@gcc.gnu.org; gcc-prs@gcc.gnu.org; nobody@gcc.gnu.org
Subject: Re: optimization/10362: Optimization with constant shifts and compares fails on MIPS


Synopsis: Optimization with constant shifts and compares fails on MIPS

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Wed Apr  9 22:44:59 2003
State-Changed-Why:
    The attachment got lost. Can you please re-send it as a 
    reply to this mail?
    
    Thanks
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10362