On 03/11/2015 10:43 AM, Marat Zakirov wrote:
On 03/03/2015 10:36 AM, Marat Zakirov wrote:
On 02/24/2015 03:49 PM, Marat Zakirov wrote:
On 02/20/2015 03:07 PM, Jakub Jelinek wrote:
On Fri, Feb 20, 2015 at 02:59:51PM +0300, Marat Zakirov wrote:
Here is simple patch that moves asan phase just behind sanopt for all
O0/O1/O2/O3 modes which gives +7% on x86 SPEC2006 (ref dataset).
Regression testing and sanitized GCC bootstrapping were
successfully done.
This isn't a regression, so I think it isn't appropriate for stage 4.
I bet the difference is mainly vectorization. I believe the right
change is to teach the vectorizer about the ASAN_CHECK internal call
instead.
Jakub
Jakub,
I reproduced +28% for 433.milk with "-fno-tree-vectorize" on ref
data. Are there some other GCC vectorization options? And why do you
think that performance difference caused only by vectorization? As an
example In llvm loop hoisting suffers from early asan phase
http://lists.cs.uiuc.edu/pipermail/llvmdev/2011-December/046332.html.
I think it would help if we could analyze where performance improvements
are coming from. You can check Max's presentation for inspiration
(http://www.youtube.com/watch?v=qTDBHJsWDHw).
-Y
