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re PR middle-end/40946 (Spurious array subscript is above bounds warning)

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PR middle-end/40946
	* gcc.dg/pr40946.c: New test.

From-SVN: r154047
This commit is contained in:
Jakub Jelinek 2009-11-09 20:40:56 +01:00 • committed by Jakub Jelinek
parent 633f54d041
commit 29a0acd42d
2 changed files with 38 additions and 0 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2009-11-09 Jakub Jelinek <jakub@redhat.com>
PR middle-end/40946
* gcc.dg/pr40946.c: New test.
2009-11-09 Jason Merrill <jason@redhat.com>
PR c++/41972

33
gcc/testsuite/gcc.dg/pr40946.c Normal file
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/* PR middle-end/40946 */
/* { dg-do compile } */
/* { dg-options "-O2 -Wall" } */
struct A
{
unsigned char a1[8];
unsigned short a2, a3, a4, a5, a6, a7;
};
int bar (void *, const char *, int);
char *foo (void *, int);
char *
baz (const char *x, const char *y)
{
int a = sizeof (struct A) + 2 * (__builtin_strlen (y)
+ __builtin_strlen (x) + 24) + 16;
struct A *b = __builtin_malloc (a);
char *c;
int d;
b->a4 = sizeof (struct A);
c = ((char *) b) + b->a4;
d = ((char *) b) + a - c;
b->a2 = b->a3 = (unsigned short) bar (c, y, d); /* { dg-bogus "array subscript is above array bounds" } */
c += b->a2;
d = ((char *) b) + a - c;
b->a7 = b->a4 + b->a2;
b->a5 = b->a6 = (unsigned short) bar (c, x, d);
c = foo (b, a);
return c;
}