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[multiple changes]

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2009-08-12  Andrey Belevantsev  <abel@ispras.ru>

    PR rtl-optimization/41033
    * alias.c (nonoverlapping_component_refs_p): Punt if strict aliasing is disabled.

2009-08-12  Richard Guenther  <rguenther@suse.de>

    PR rtl-optimization/41033
    * gcc.dg/pr41033.c: New test.

From-SVN: r150680
This commit is contained in:
Andrey Belevantsev 2009-08-12 15:50:22 +04:00
parent c0e18b82d0
commit 4c7af93945
4 changed files with 38 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-08-12 Andrey Belevantsev <abel@ispras.ru>
PR rtl-optimization/41033
* alias.c (nonoverlapping_component_refs_p): Punt when strict
aliasing is disabled.
2009-08-11 Adam Nemet <anemet@caviumnetworks.com>
* config/mips/predicates.md (qi_mask_operand, hi_mask_operand,

3
gcc/alias.c
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@ -1980,6 +1980,9 @@ nonoverlapping_component_refs_p (const_tree x, const_tree y)
{
const_tree fieldx, fieldy, typex, typey, orig_y;
if (!flag_strict_aliasing)
return false;
do
{
/* The comparison has to be done at a common type, since we don't

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2009-08-12 Richard Guenther <rguenther@suse.de>
PR rtl-optimization/41033
* gcc.dg/pr41033.c: New test.
2009-08-11 Janus Weil <janus@gcc.gnu.org>
PR fortran/41022

24
gcc/testsuite/gcc.dg/pr41033.c Normal file
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@ -0,0 +1,24 @@
/* { dg-options "-O1 -fno-strict-aliasing" } */
/* PR rtl-optimization/41033 */
struct X {
int i;
int j;
};
int foo(struct X *p, struct X *q)
{
p->j = 1;
q->i = 0;
return p->j;
}
extern void abort (void);
int main()
{
struct X x;
if (foo (&x, (struct X *)&x.j) != 0)
abort ();
return 0;
}