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From: "wojtek.golf at interia dot pl" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/60431] [PATCH] [TIC6X] target description missing abssi2 insn
Date: Wed, 05 Mar 2014 21:53:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60431

--- Comment #5 from Wojciech Migda <wojtek.golf at interia dot pl> ---
So, I'd like to learn some more from this. Suppose I have code like this:

int fn_i1(int x)
{
  x /= 2;
  return (x >= 0) ? x : -x;
}

or

short fn_s1(short x)
{
  return (x >= 0) ? x : -x;
}

In each case the compiler should know that the range of values being subjected
to *abs is such that it won't matter whether it will use the sign saturated
instruction or not. But it doesn't take advantage of that. Or I am still
getting it wrong?