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RE: 4.7.0 regression? gcc.c-torture/execute/vla-dealloc-1.c failure.


Hi,

Similarly for the following two test case which deals with VLA 
de-allocation in a branch back situation:
  1. gcc.c-torture/execute/pr43220.c
  2. gcc.c-torture/execute/20040811-1.c

Regards,
Kannan

-----Original Message-----
From: Mailaripillai, Kannan Jeganathan 
Sent: Thursday, May 03, 2012 4:48 PM
To: 'gcc@gcc.gnu.org'
Subject: 4.7.0 regression? gcc.c-torture/execute/vla-dealloc-1.c failure.

Hi,

This is regarding gcc.c-torture/execute/vla-dealloc-1.c failure.

4.7.0 ia64-hp-hpux:       program timed out (time out 300 seconds).
4.7.0 ia64-redhat-linux:  program timed out (time out 300 seconds).
4.7.0 x86_64-suse-linux:  execution completes successfully.

Inserting a printf statement in the loop path makes the executable to 
complete executing without any issues.

4.6.3 ia64-hp-hpux:       execution completes successfully.

So it looks like a regression in 4.7.0. Any suggestion, which fix (check in) 
between 4.6.3 and 4.7.0 could have caused this failure?

==== gcc.c-torture/execute/vla-dealloc-1.c

#if (__SIZEOF_INT__ <= 2)
#define LIMIT 10000
#else
#define LIMIT 1000000
#endif

void *volatile p;

int
main (void)
{
  int n = 0;
  if (0)
    {
    lab:;
    }
  int x[n % 1000 + 1];
  x[0] = 1;
  x[n % 1000] = 2;
  p = x;
  n++;
  if (n < LIMIT)
    goto lab;
  return 0;
}

Regards,
Kannan


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