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tree-scalar-evolution.c (set_nb_iterations_in_loop): Only check for TREE_OVERFLOW on INTEGER_CST trees. 

* tree-scalar-evolution.c (set_nb_iterations_in_loop): Only
	check for TREE_OVERFLOW on INTEGER_CST trees.
	* tree-chrec.c (chrec_convert): Only clear TREE_OVERFLOW on
	CONSTANT_CLASS_P tree nodes.

From-SVN: r99765
This commit is contained in:
Roger Sayle 2005-05-16 04:36:09 +00:00 committed by Roger Sayle
parent 21e4385058
commit 94a3e63aca
3 changed files with 14 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2005-05-15 Roger Sayle <roger@eyesopen.com>
* tree-scalar-evolution.c (set_nb_iterations_in_loop): Only
check for TREE_OVERFLOW on INTEGER_CST trees.
* tree-chrec.c (chrec_convert): Only clear TREE_OVERFLOW on
CONSTANT_CLASS_P tree nodes.
2005-05-15 H.J. Lu <hongjiu.lu@intel.com>
PR target/21551

6
gcc/tree-chrec.c
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@ -1062,9 +1062,11 @@ chrec_convert (tree type,
tree res = fold_convert (type, chrec);
/* Don't propagate overflows. */
TREE_OVERFLOW (res) = 0;
if (CONSTANT_CLASS_P (res))
TREE_CONSTANT_OVERFLOW (res) = 0;
{
TREE_CONSTANT_OVERFLOW (res) = 0;
TREE_OVERFLOW (res) = 0;
}
/* But reject constants that don't fit in their type after conversion.
This can happen if TYPE_MIN_VALUE or TYPE_MAX_VALUE are not the

5
gcc/tree-scalar-evolution.c
View File

@ -922,8 +922,9 @@ set_nb_iterations_in_loop (struct loop *loop,
count of the loop in order to be compatible with the other
nb_iter computations in loop-iv. This also allows the
representation of nb_iters that are equal to MAX_INT. */
if ((TREE_CODE (res) == INTEGER_CST && TREE_INT_CST_LOW (res) == 0)
|| TREE_OVERFLOW (res))
if (TREE_CODE (res) == INTEGER_CST
&& (TREE_INT_CST_LOW (res) == 0
|| TREE_OVERFLOW (res)))
res = chrec_dont_know;
if (dump_file && (dump_flags & TDF_DETAILS))