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To: gcc-patches@gcc.gnu.org
Subject: [PATCH] [GCC-12] Mention O2 vectorization enabling.
Date: Fri, 8 Oct 2021 15:29:11 +0800
Message-Id: <20211008072911.86497-1-hongtao.liu@intel.com>
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---
htdocs/gcc-12/changes.html | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html
index 22839f2d..6e898db7 100644
--- a/htdocs/gcc-12/changes.html
+++ b/htdocs/gcc-12/changes.html
@@ -68,6 +68,15 @@ a work-in-progress.
General Improvements
+
+ - The vectorization is enabled in
-O2
, now -O2
is
+ equivalent to the original -O2 -ftree-vectorize
+ -fvect-cost-model=very-cheap
. Note that default vect cost model has
+ been changed which may have a subtle effect, for example for the case with
+ -O2 -fopenmp #pragma omp parallel for simd
.
+
+
+
New Languages and Language specific improvements