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re PR tree-optimization/23929 (segfault in expand_simple_operations, tree-ssa-loop-niter.c:637) 

PR tree-optimization/23929
	* tree-ssa-loop-niter.c (expand_simple_operations): Return immediately
	if expr is NULL.

	* gcc.c-torture/compile/pr23929.c: New test.

From-SVN: r104461
This commit is contained in:
Jakub Jelinek 2005-09-20 21:10:44 +02:00 committed by Jakub Jelinek
parent df5d636787
commit 6fff260313
4 changed files with 35 additions and 1 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2005-09-20 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/23929
* tree-ssa-loop-niter.c (expand_simple_operations): Return immediately
if expr is NULL.
PR tree-optimization/23818
* tree-stdarg.c (execute_optimize_stdarg): Call
calculate_dominance_info.

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2005-09-20 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/23929
* gcc.c-torture/compile/pr23929.c: New test.
2005-09-20 Steve Ellcey <sje@cup.hp.com>
PR testsuite/23186

21
gcc/testsuite/gcc.c-torture/compile/pr23929.c Normal file
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@ -0,0 +1,21 @@
/* PR tree-optimization/23929 */
extern void bar (char *);
void
foo (int n, char *z)
{
char b[2048];
int x, y;
bar (b);
for (y = 0; y < 60; y++)
if (n == 600)
for (x = 0; x < 320;)
{
*z++ = b[x];
x += 1;
*z++ = b[x];
x += 1;
}
}

6
gcc/tree-ssa-loop-niter.c
View File

@ -634,11 +634,15 @@ expand_simple_operations (tree expr)
{
unsigned i, n;
tree ret = NULL_TREE, e, ee, stmt;
enum tree_code code = TREE_CODE (expr);
enum tree_code code;
if (expr == NULL_TREE)
return expr;
if (is_gimple_min_invariant (expr))
return expr;
code = TREE_CODE (expr);
if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (code)))
{
n = TREE_CODE_LENGTH (code);