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[Bug c/66194] emit vectorization instruction for not aligned data(amd64), -fno-strict-aliasing not help
- From: "trippels at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 18 May 2015 17:51:30 +0000
- Subject: [Bug c/66194] emit vectorization instruction for not aligned data(amd64), -fno-strict-aliasing not help
- Auto-submitted: auto-generated
- References: <bug-66194-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66194
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |trippels at gcc dot gnu.org
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
-fsanitize=undefined shows:
% ./thash
dummyhash.c:10:11: runtime error: load of misaligned address 0x7ffd86aca073 for
type 'uint32_t', which requires 4 byte alignment
0x7ffd86aca073: note: pointer points here
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00
^