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re PR c/51628 (__attribute__((packed)) is unsafe in some cases (i.e. add -Waddress-of-packed-member, etc.))

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PR c/51628
	PR target/88682
	* c-c++-common/pr51628-10.c (unaligned_int128_t): Add
	may_alias attribute.

From-SVN: r267970
This commit is contained in:
Jakub Jelinek 2019-01-16 15:18:47 +01:00 committed by Jakub Jelinek
parent ee8045e577
commit e964d9b23a
2 changed files with 8 additions and 1 deletions
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7
gcc/testsuite/ChangeLog
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@ -1,3 +1,10 @@
2019-01-16 Jakub Jelinek <jakub@redhat.com>
PR c/51628
PR target/88682
* c-c++-common/pr51628-10.c (unaligned_int128_t): Add
may_alias attribute.
2019-01-15 Nikhil Benesch <nikhil.benesch@gmail.com>
* gcc.misc-tests/godump-1.c: Add test case for typedef before

2
gcc/testsuite/c-c++-common/pr51628-10.c
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@ -11,7 +11,7 @@ struct pair_t
typedef struct unaligned_int128_t_
{
__int128_t value;
} __attribute__((packed)) unaligned_int128_t;
} __attribute__((packed, may_alias)) unaligned_int128_t;
struct pair_t p = {0, 1};
unaligned_int128_t *addr = (unaligned_int128_t *) &p.i;