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[wwwdocs] Describe behavior of -flifetime-dse in class constructors

Message ID 56CEE3F7.6020609@suse.cz
State New
Headers show

Commit Message

Martin Liška Feb. 25, 2016, 11:22 a.m. UTC 
On 02/19/2016 05:52 AM, Jan Hubicka wrote:
> Hi,
> thank you for working this out and writting summary. I think in a shorter form this would make
> excellent entry for changes.html, too.  We tell about the new feature and warn users about fallout
> that is always good.

Good idea.

That's a suggestion for changes.html.

Ready to be installed?
Martin

Comments

Gerald Pfeifer Feb. 28, 2016, 9:42 p.m. UTC | #1 
On Thu, 25 Feb 2016, Martin Liška wrote:
> That's a suggestion for changes.html.
> 
> Ready to be installed?

Works for me, Martin, but please give Jason a day or two to comment.

Thanks,
Gerald
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Patch

Index: htdocs/gcc-6/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-6/changes.html,v
retrieving revision 1.62
diff --unified -r1.62 changes.html
--- htdocs/gcc-6/changes.html	24 Feb 2016 09:36:06 -0000	1.62
+++ htdocs/gcc-6/changes.html	25 Feb 2016 11:21:42 -0000
@@ -230,6 +230,10 @@ 
     <li>The default mode has been changed to <code>-std=gnu++14</code>.</li>
     <li>C++ Concepts are now supported when compiling with
         <code>-std=gnu++1z</code> or <code>-std=c++1z</code>.</li>
+    <li><code>-flifetime-dse</code> is more
+    aggressive in dead-store elimination in situations where
+    a memory store to a location precedes a constructor to the
+    memory location.</li>
   </ul>
 
 <h4 id="libstdcxx">Runtime Library (libstdc++)</h4>