diff options
| author | Jianzhou Zhao <jianzhouzh@google.com> | 2021-01-12 21:49:59 +0000 |
|---|---|---|
| committer | Jianzhou Zhao <jianzhouzh@google.com> | 2021-01-13 01:22:05 +0000 |
| commit | 82655c151450e0103a3aa60725639da607f9220c (patch) | |
| tree | f9d7ed4d78b4b4275fa7f7dd151bbaa9f9801d76 /llvm/lib/Transforms/Utils/LoopUtils.cpp | |
| parent | 25eb7b08ba77a0b7c9c938490444bb8b5121233c (diff) | |
| download | llvm-82655c151450e0103a3aa60725639da607f9220c.zip llvm-82655c151450e0103a3aa60725639da607f9220c.tar.gz llvm-82655c151450e0103a3aa60725639da607f9220c.tar.bz2 | |
[MSan] Tweak CopyOrigin
There could be some mis-alignments when copying origins not aligned.
I believe inaligned memcpy is rare so the cases do not matter too much
in practice.
1) About the change at line 50
Let dst be (void*)5,
then d=5, beg=4
so we need to write 3 (4+4-5) bytes from 5 to 7.
2) About the change around line 77.
Let dst be (void*)5,
because of lines 50-55, the bytes from 5-7 were already writen.
So the aligned copy is from 8.
Reviewed-by: eugenis
Differential Revision: https://reviews.llvm.org/D94552
Diffstat (limited to 'llvm/lib/Transforms/Utils/LoopUtils.cpp')
0 files changed, 0 insertions, 0 deletions