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[wwwdoc] Mention O2 vectorization enhancement.

Message ID 20241015063156.232666-1-hongtao.liu@intel.com
State New
Headers show
Series [wwwdoc] Mention O2 vectorization enhancement. | expand

Commit Message

Liu, Hongtao Oct. 15, 2024, 6:31 a.m. UTC 
---
 htdocs/gcc-15/changes.html | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/htdocs/gcc-15/changes.html b/htdocs/gcc-15/changes.html
index 6dc46a52..8a238256 100644
--- a/htdocs/gcc-15/changes.html
+++ b/htdocs/gcc-15/changes.html
@@ -36,6 +36,16 @@  a work-in-progress.</p>
 <!-- .................................................................. -->
 <h2 id="general">General Improvements</h2>
 
+<ul>
+  <li>The default vectorizer cost model at <code>-O2</code> has been enhanced
+    to handle unknown tripcount. But it still disables vectorization of loops
+    when any runtime check for data dependence or alignment is required,
+    it also disables vectorization of epilogue loops but otherwise is equal
+    to the cheap cost model.
+  </li>
+</ul>
+
+
 <!-- .................................................................. -->
 <h2 id="languages">New Languages and Language specific improvements</h2>