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re PR tree-optimization/31169 (Bootstrap comparison error at revision 122821)

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2007-04-12  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/31169
	* gcc.c-torture/execute/pr31169.c: New testcase.

From-SVN: r123737
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Richard Guenther 2007-04-12 09:20:42 +00:00 committed by Richard Biener
parent 5852948c5b
commit 6e734d9820
2 changed files with 56 additions and 0 deletions
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5
gcc/testsuite/ChangeLog
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2007-04-12 Richard Guenther <rguenther@suse.de>
PR tree-optimization/31169
* gcc.c-torture/execute/pr31169.c: New testcase.
2007-04-12 Richard Guenther <rguenther@suse.de>
PR tree-optimization/24689

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gcc/testsuite/gcc.c-torture/execute/pr31169.c Normal file
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extern void abort();
#define HOST_WIDE_INT long
#define HOST_BITS_PER_WIDE_INT (sizeof(long)*8)
struct tree_type
{
unsigned int precision : 9;
};
int
sign_bit_p (struct tree_type *t, HOST_WIDE_INT val_hi, unsigned HOST_WIDE_INT val_lo)
{
unsigned HOST_WIDE_INT mask_lo, lo;
HOST_WIDE_INT mask_hi, hi;
int width = t->precision;
if (width > HOST_BITS_PER_WIDE_INT)
{
hi = (unsigned HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT - 1);
lo = 0;
mask_hi = ((unsigned HOST_WIDE_INT) -1
>> (2 * HOST_BITS_PER_WIDE_INT - width));
mask_lo = -1;
}
else
{
hi = 0;
lo = (unsigned HOST_WIDE_INT) 1 << (width - 1);
mask_hi = 0;
mask_lo = ((unsigned HOST_WIDE_INT) -1
>> (HOST_BITS_PER_WIDE_INT - width));
}
if ((val_hi & mask_hi) == hi
&& (val_lo & mask_lo) == lo)
return 1;
return 0;
}
int main()
{
struct tree_type t;
t.precision = 1;
if (!sign_bit_p (&t, 0, -1))
abort ();
return 0;
}