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From: "su at cs dot ucdavis.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/60062] [4.7/4.9 Regression] wrong code (for code with the optimize attribute) at -O1 and above on x86_64-linux-gnu in 32-bit mode
Date: Wed, 05 Feb 2014 15:43:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60062

--- Comment #5 from Zhendong Su <su at cs dot ucdavis.edu> ---
(In reply to Jakub Jelinek from comment #4)
> *** Bug 60072 has been marked as a duplicate of this bug. ***

The testcase below is most likely another dup as the only difference is that it
affects the trunk at -Os only. Just include it here for reference. Thanks. 


----------------------------------


int printf (const char *, ...);

int a;

int
fn1 (unsigned char p1)
{
  return p1 % p1;
}

static void
fn2 (char *p1, int p2)
{
  if (p2)
    printf (p1);
}

__attribute__ ((optimize (0)))
int fn3 (short p1, short p2)
{
  a = 0;
  return 0;
}

__attribute__ ((optimize (1)))
int fn4 ()
{
  fn3 (0, 0);
  if (fn1 (1))
    for (;;)
      ;
  return 1;
}

__attribute__ ((optimize (0)))
int main ()
{
  fn4 ();
  fn2 ("", 0);
  return 0;
}