[PATCH] Fixes tree-loop-distribute-patterns issues

[Ondřej Bílka]

On Thu, Jun 20, 2013 at 10:33:21PM +0000, Joseph S. Myers wrote:
> On Thu, 20 Jun 2013, Ondrej Bilka wrote:
> 
> > Actually you should split simple_* to separate files and compile them with
> > O0.
> > 
> > Doing otherwise makes their performance dependent on gcc version and
> > this makes results even more unreliable.
> 
> I expect -O0 performance to depend a lot more on GCC version than -O2.
> 
You expect but could you prove it? Please provide two versions of gcc
where you get different simple-* function when compiling with -O0 -S

Versions I checked are
 Debian 4.5.3-12
 Debian 4.7.1-2
gcc version 4.9.0 20130516 (experimental) (GCC)

Assemblies produced are same for following fragment:

void 
*memset (char *s, int c, int n)
{
  int i;
  for(i=0 ;i<n; i++) s[i] = c;
  return s;
}