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re PR tree-optimization/31034 (ICE in set_value_range, at tree-vrp.c:267)

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PR tree-optimization/31034
	* tree-vrp.c (extract_range_from_assert): Don't try to handle a
	half-range if the other side is an overflow infinity.

From-SVN: r122562
This commit is contained in:
Ian Lance Taylor 2007-03-05 18:01:00 +00:00 committed by Ian Lance Taylor
parent 666ff4f65d
commit 7343ff45ca
2 changed files with 14 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-03-05 Ian Lance Taylor <iant@google.com>
PR tree-optimization/31034
* tree-vrp.c (extract_range_from_assert): Don't try to handle a
half-range if the other side is an overflow infinity.
2007-03-05 Bernd Schmidt <bernd.schmidt@analog.com>
* config.gcc (bfin*-uclinux*): Use t-bfin-uclinux.

14
gcc/tree-vrp.c
View File

@ -1137,13 +1137,14 @@ extract_range_from_assert (value_range_t *vr_p, tree expr)
/* If the maximum value forces us to be out of bounds, simply punt.
It would be pointless to try and do anything more since this
all should be optimized away above us. */
if (cond_code == LT_EXPR && compare_values (max, min) == 0)
if ((cond_code == LT_EXPR
&& compare_values (max, min) == 0)
|| is_overflow_infinity (max))
set_value_range_to_varying (vr_p);
else
{
/* For LT_EXPR, we create the range [MIN, MAX - 1]. */
if (cond_code == LT_EXPR
&& !is_positive_overflow_infinity (max))
if (cond_code == LT_EXPR)
{
tree one = build_int_cst (type, 1);
max = fold_build2 (MINUS_EXPR, type, max, one);
@ -1169,13 +1170,14 @@ extract_range_from_assert (value_range_t *vr_p, tree expr)
/* If the minimum value forces us to be out of bounds, simply punt.
It would be pointless to try and do anything more since this
all should be optimized away above us. */
if (cond_code == GT_EXPR && compare_values (min, max) == 0)
if ((cond_code == GT_EXPR
&& compare_values (min, max) == 0)
|| is_overflow_infinity (min))
set_value_range_to_varying (vr_p);
else
{
/* For GT_EXPR, we create the range [MIN + 1, MAX]. */
if (cond_code == GT_EXPR
&& !is_negative_overflow_infinity (min))
if (cond_code == GT_EXPR)
{
tree one = build_int_cst (type, 1);
min = fold_build2 (PLUS_EXPR, type, min, one);