diff options
| -rw-r--r-- | docs/Vectorizers.rst | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/docs/Vectorizers.rst b/docs/Vectorizers.rst index fc1f212..d5bc90b 100644 --- a/docs/Vectorizers.rst +++ b/docs/Vectorizers.rst @@ -2,12 +2,18 @@ Auto-Vectorization in LLVM ========================== -LLVM has two vectorizers: The *Loop Vectorizer*, which operates on Loops, -and the *Basic Block Vectorizer*, which optimizes straight-line code. These -vectorizers focus on different optimization opportunities and use different -techniques. The BB vectorizer merges multiple scalars that are found in the -code into vectors while the Loop Vectorizer widens instructions in the -original loop to operate on multiple consecutive loop iterations. +.. contents:: + :local: + +LLVM has two vectorizers: The :ref:`Loop Vectorizer <loop-vectorizer>`, +which operates on Loops, and the :ref:`Basic Block Vectorizer +<bb-vectorizer>`, which optimizes straight-line code. These vectorizers +focus on different optimization opportunities and use different techniques. +The BB vectorizer merges multiple scalars that are found in the code into +vectors while the Loop Vectorizer widens instructions in the original loop +to operate on multiple consecutive loop iterations. + +.. _loop-vectorizer: The Loop Vectorizer =================== @@ -209,6 +215,8 @@ The Y-axis shows the time in msec. Lower is better. The last column shows the ge .. image:: gcc-loops.png :width: 100% +.. _bb-vectorizer: + The Basic Block Vectorizer ========================== |