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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/56888] memcpy implementation optimized as a call to memcpy
Date: Wed, 02 Oct 2013 08:49:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56888

--- Comment #22 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
(In reply to Richard Biener from comment #21)
> -fno-tree-loop-distribute-patterns is the reliable way to not transform loops
> into library calls.

Thanks!

Adding this fixed the generated code:

#pragma GCC optimize ("no-tree-loop-distribute-patterns")

BTW their memset.c looks like this:

externC void *
memset( void *s, int c, size_t n ) __attribute__ ((weak, alias("_memset")));

void *
_memset( void *s, int c, size_t n )
{
  while (...)
}