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| -rw-r--r-- | docs/Vectorizers.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/docs/Vectorizers.rst b/docs/Vectorizers.rst index 9507fd6953..f585c630f9 100644 --- a/docs/Vectorizers.rst +++ b/docs/Vectorizers.rst @@ -12,6 +12,9 @@ original loop to operate on multiple consecutive loop iterations. The Loop Vectorizer =================== +Usage +^^^^^^ + LLVM’s Loop Vectorizer is now available and will be useful for many people. It is not enabled by default, but can be enabled through clang using the command line flag: @@ -208,6 +211,9 @@ The Y-axis shows time in msec. Lower is better. The Basic Block Vectorizer ========================== +Usage +^^^^^^ + The Basic Block Vectorizer is not enabled by default, but it can be enabled through clang using the command line flag: @@ -215,6 +221,9 @@ through clang using the command line flag: $ clang -fslp-vectorize file.c +Details +^^^^^^^ + The goal of basic-block vectorization (a.k.a. superword-level parallelism) is to combine similar independent instructions within simple control-flow regions into vector instructions. Memory accesses, arithemetic operations, comparison |