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diff --git a/docs/Vectorizers.rst b/docs/Vectorizers.rst index 291c76dd26..b60e46dbca 100644 --- a/docs/Vectorizers.rst +++ b/docs/Vectorizers.rst @@ -188,6 +188,19 @@ See the table below for a list of these functions. |fma |trunc|nearbyint| +-----+-----+---------+ +Performance +^^^^^^^^^^^ + +This section shows the the execution time of Clang on a simple benchmark: +`gcc-loops <http://llvm.org/viewvc/llvm-project/test-suite/trunk/SingleSource/UnitTests/Vectorizer/>`._ +This benchmarks is a collection of loops from the GCC autovectorization +`page <http://gcc.gnu.org/projects/tree-ssa/vectorization.html>` by Dorit Nuzman._ + +The chart below compares GCC-4.7, ICC-13, and Clang-SVN at -O3, running on a Sandybridge. +The Y-axis shows time in msec. Lower is better. + +.. image:: gcc-loops.png + The Basic Block Vectorizer ========================== |