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re PR tree-optimization/26425 (ice on valid C code with flag -Os)

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PR tree-optimization/26425
	* tree-vrp.c (vrp_visit_assignment): If the LHS's type has a NULL
	min/max, then assume its varying.

	* gcc.c-torture/compile/pr26425.c: New test.

From-SVN: r111399
This commit is contained in:
Jeff Law 2006-02-23 15:47:58 -07:00 • committed by Jeff Law
parent 10c5bc6c2d
commit e260a6142e
4 changed files with 24 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2006-02-23 Jeff Law <law@redhat.com>
PR tree-optimization/26425
* tree-vrp.c (vrp_visit_assignment): If the LHS's type has a NULL
min/max, then assume its varying.
2006-02-23 Zdenek Dvorak <dvorakz@suse.cz>
PR rtl-optimization/26316

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2006-02-23 Jeff Law <law@redhat.com>
* gcc.c-torture/compile/pr26425.c: New test.
2006-02-23 Jakub Jelinek <jakub@redhat.com>
PR middle-end/26412

9
gcc/testsuite/gcc.c-torture/compile/pr26425.c Normal file
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@ -0,0 +1,9 @@
struct keyring_list {
struct key *keys[0];
};
void keyring_destroy(struct keyring_list *keyring, unsigned short a)
{
int loop;
for (loop = a - 1; loop >= 0; loop--)
key_put(keyring->keys[loop]);
}

6
gcc/tree-vrp.c
View file

@ -3375,7 +3375,11 @@ vrp_visit_assignment (tree stmt, tree *output_p)
/* We only keep track of ranges in integral and pointer types. */
if (TREE_CODE (lhs) == SSA_NAME
&& (INTEGRAL_TYPE_P (TREE_TYPE (lhs))
&& ((INTEGRAL_TYPE_P (TREE_TYPE (lhs))
/* It is valid to have NULL MIN/MAX values on a type. See
build_range_type. */
&& TYPE_MIN_VALUE (TREE_TYPE (lhs))
&& TYPE_MAX_VALUE (TREE_TYPE (lhs)))
|| POINTER_TYPE_P (TREE_TYPE (lhs))))
{
struct loop *l;