docs: Improve the docs about llvm-isel-fuzzer on OSS Fuzz

llvm-svn: 315651

1 files changed, 9 insertions, 4 deletions

diff --git a/llvm/docs/FuzzingLLVM.rst b/llvm/docs/FuzzingLLVM.rst
index aa777cf7cd6..138c655a962 100644
--- a/llvm/docs/FuzzingLLVM.rst
+++ b/llvm/docs/FuzzingLLVM.rst
@@ -83,10 +83,15 @@ the following command would fuzz AArch64 with :doc:`GlobalISel`:
 
 Some flags can also be specified in the binary name itself in order to support
 OSS Fuzz, which has trouble with required arguments. To do this, you can copy
-or move ``llvm-isel-fuzzer`` to ``llvm-isel-fuzzer--x-y-z``, where x, y, and z
-are architecture names (``aarch64``, ``x86_64``), optimization levels (``O0``,
-``O2``), or specific keywords like ``gisel`` for enabling global instruction
-selection.
+or move ``llvm-isel-fuzzer`` to ``llvm-isel-fuzzer--x-y-z``, separating options
+from the binary name using "--". The valid options are architecture names
+(``aarch64``, ``x86_64``), optimization levels (``O0``, ``O2``), or specific
+keywords, like ``gisel`` for enabling global instruction selection. In this
+mode, the same example could be run like so:
+
+.. code-block:: shell
+
+   % bin/llvm-isel-fuzzer--aarch64-O0-gisel <corpus-dir>
 
 llvm-mc-assemble-fuzzer
 -----------------------